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Journal articles on the topic 'Accident results removal'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zaki, Su'ud, Nuri Trianti, and Rosidah M. Indah. "Preliminary Analysis of Unprotected Loss of Heat Sink in Small Long Life Gas Cooled Fast Reactor." Applied Mechanics and Materials 751 (April 2015): 268–72. http://dx.doi.org/10.4028/www.scientific.net/amm.751.268.

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The failure of the secondary side in Gas Cooled Fast Reactor system, which may contain co-generation system, will cause loss of heat sink (LOHS) accident. In this study accident analysis of unprotected loss of heat sink due to the failure of the secondary cooling system has been investigated. The thermal hydraulic model include transient hot spot channel model in the core, steam generator, and related systems. Natural circulation based heat removal system is important to ensure inherent safety capability during unprotected accidents. Therefore the system similar to RVACS (reactor vessel auxili

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2

Kaliatka, Algirdas, Viktor Ognerubov, Virginijus Vileiniškis, and Eugenijus Ušpuras. "Analysis of the Processes in Spent Fuel Pools in Case of Loss of Heat Removal due to Water Leakage." Science and Technology of Nuclear Installations 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/598975.

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The safe storage of spent fuel assemblies in the spent fuel pools is very important. These facilities are not covered by leaktight containment; thus, the consequences of overheating and melting of fuel in the spent fuel pools can be very severe. On the other hand, due to low decay heat of fuel assemblies, the processes in pools are slow in comparison with processes in reactor core during LOCA accident. Thus, the accident management measures play a very important role in case of some accidents in spent fuel pools. This paper presents the analysis of possible consequences of fuel overheating due

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3

Hu, Chongju, Wangli Huang, Zhizhong Jiang, et al. "Analysis on passive residual heat removal system with heat pipes for longterm decay heat removal of small lead-based reactor." E3S Web of Conferences 236 (2021): 01018. http://dx.doi.org/10.1051/e3sconf/202123601018.

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.A lead-based reactor with employing heat pipes as passive residual heat removal system (PRHRS) for longterm decay heat removal was designed. Three-dimensional computational fluid dynamics (CFD) software FLUENT was adopted to simulate the thermal-hydraulic characteristics of the PRHRS under Station-Black-Out (SBO) accident condition. The results showed that heat in the core could be removed smoothly by the PRHRS, and the core temperature difference is less than 20 K.

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Skalozubov, V., V. Spinov, D. Spinov, Т. Gablaya, V. Kochnyeva, and Yu Komarov. "SUBSTANTIATION OF MODERNIZED BLACKOUT & LOSS-OF-COOLANT ACCIDENT MANAGEMENT STRATEGY AT NUCLEAR POWER PLANTS WITH WWER." Odes’kyi Politechnichnyi Universytet Pratsi 2, no. 61 (2020): 70–77. http://dx.doi.org/10.15276/opu.2.61.2020.08.

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The analysis of the known results of RELAP5/V.3.2 simulation for loss of coolant & blackout accidents at WWER nuclear power plants showed that the design accident management strategies with design passive safety systems do not provide the necessary safety conditions for the maximum permissible temperature of fuel claddings, the minimum permissible level of coolant in the reactor and feed water in the steam generators. A conservative thermohydrodynamic model for a design and modernized blackout & loss-of-coolant accident management strategy at a nuclear power plant with WWER has been de

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5

Kristiansen, N. I., A. Stohl, and G. Wotawa. "Atmospheric removal times of the aerosol-bound radionuclides <sup>137</sup>Cs and <sup>131</sup>I during the months after the Fukushima Dai-ichi nuclear power plant accident – a constraint for air quality and climate models." Atmospheric Chemistry and Physics Discussions 12, no. 5 (2012): 12331–56. http://dx.doi.org/10.5194/acpd-12-12331-2012.

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Abstract. Caesium-137 (137Cs) and iodine-131 (131I) are radionuclides of particular concern during nuclear accidents, because they are emitted in large amounts and are of significant health impact. 137Cs and 131I attach to the ambient accumulation-mode (AM) aerosols and share their fate as the aerosols are removed from the atmosphere by scavenging within clouds, precipitation and dry deposition. Here, we estimate their removal times from the atmosphere using a unique high-precision global measurement data set collected over several months after the accident at the Fukushima Dai-ichi nuclear po

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Kristiansen, N. I., A. Stohl, and G. Wotawa. "Atmospheric removal times of the aerosol-bound radionuclides <sup>137</sup>Cs and <sup>131</sup>I measured after the Fukushima Dai-ichi nuclear accident – a constraint for air quality and climate models." Atmospheric Chemistry and Physics 12, no. 22 (2012): 10759–69. http://dx.doi.org/10.5194/acp-12-10759-2012.

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Abstract. Caesium-137 (137Cs) and iodine-131 (131I) are radionuclides of particular concern during nuclear accidents, because they are emitted in large amounts and are of significant health impact. 137Cs and 131I attach to the ambient accumulation-mode (AM) aerosols and share their fate as the aerosols are removed from the atmosphere by scavenging within clouds, precipitation and dry deposition. Here, we estimate their removal times from the atmosphere using a unique high-precision global measurement data set collected over several months after the accident at the Fukushima Dai-ichi nuclear po

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7

Zaki, Su'ud. "Unprotected Loss of Flow Accident in Small Long Life Gas Cooled Fast Reactor." Applied Mechanics and Materials 751 (April 2015): 263–67. http://dx.doi.org/10.4028/www.scientific.net/amm.751.263.

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In post Fukushima nuclear accidents inherent safety capability is necessary against some standard accidents such as unprotected loss of flow (ULOF), unprotected rod run-out transient over power (UTOP), unprotected loss of heat sink (ULOHS). Gas cooled fast reactors is one of the important candidate of 4th generation nuclear power plant and in this paper the safety analysis related to unprotected loss of flow in small long life gas cooled fast reactors has been performed. Accident analysis of unprotected loss of flow include coupled neutronic and thermal hydraulic analysis which include adiabat

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8

Hu, Chongju, Hongyan Wang, Bo Wu, Xiuxiang Zhang, and Pinghua Zhang. "Effect of heat pipe failure on performance of residual heatremoval system with heat pipe for small lead-based reactor." E3S Web of Conferences 248 (2021): 01021. http://dx.doi.org/10.1051/e3sconf/202124801021.

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Heat pipe have the characteristics of high thermal conductivity, high safety performance, without external power, etc. In this paper, The numerical simulation CFD software FLUENT is used to study the thermal-hydraulic characteristics performance of heat pipe waste heat removal system with heat pipe for lead-based reactor under normal conditions and Station-Black-Out (SBO) with partial heat pipes damage respectively. Results showed that heat pipes promote heat transfer in the reactor and reduced the temperature of the fluid around the reactor during normal operation; Heat in the core could be r

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Li, Feng, Yazhe Lu, Xiao Chu, Qiang Zheng, and Guanghao Wu. "Design, Experiment, and Commissioning of the Passive Residual Heat Removal System of China’s Generation III Nuclear Power HPR1000." Science and Technology of Nuclear Installations 2021 (March 13, 2021): 1–6. http://dx.doi.org/10.1155/2021/6680400.

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In response to a station blackout accident similar to the Fukushima nuclear accident, China’s Generation III nuclear power HPR1000 designed and developed a passive residual heat removal system connected to the secondary side of the steam generator. Based on the two-phase natural circulation principle, the system is designed to bring out long-term core residual heat after an accident to ensure that the reactor is in a safe state. The steady-state characteristic test and transient start and run test of the PRS were carried out on the integrated experiment bench named ESPRIT. The experiment resul

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10

Lelieveld, J., D. Kunkel, and M. G. Lawrence. "Global risk of radioactive fallout after major nuclear reactor accidents." Atmospheric Chemistry and Physics 12, no. 9 (2012): 4245–58. http://dx.doi.org/10.5194/acp-12-4245-2012.

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Abstract. Major reactor accidents of nuclear power plants are rare, yet the consequences are catastrophic. But what is meant by "rare"? And what can be learned from the Chernobyl and Fukushima incidents? Here we assess the cumulative, global risk of exposure to radioactivity due to atmospheric dispersion of gases and particles following severe nuclear accidents (the most severe ones on the International Nuclear Event Scale, INES 7), using particulate 137Cs and gaseous 131I as proxies for the fallout. Our results indicate that previously the occurrence of INES 7 major accidents and the risks of

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Purbayanti, Hesti Fiskalisa, and Sho'im Hidayat. "RISK ASSESSMENT KECELAKAAN KERJA PADA PEKERJAAN AIRCRAFT PAINT REMOVAL DI PT. X." Indonesian Journal of Occupational Safety and Health 7, no. 1 (2018): 63. http://dx.doi.org/10.20473/ijosh.v7i1.2018.63-71.

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The entire activity involving human factors, machinery, chemicals, and through some work processes had the potential hazard that increased the risk of accidents and health problems. Aircraft paint removal job was a high risk of an accident. The purpose of this research was to identify hazards, assess pure risks, identify risk control, and assess risks after risk control were conducted on aircraft paint removal job in PT. X. Type of this research was descriptive research. Primary data retrieval techniques in the study was observational and interview. The subject of research were 1 PDCA HSE and

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Jaiswal, Disha M. "Haze Removal System using Dark Channel Prior." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (2021): 301–9. http://dx.doi.org/10.22214/ijraset.2021.34984.

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Mostly in winter season, the Northern area of India is mostly affected due to heavy haze. The road traffic and air traffic is affected due to poor visibility. According to the survey of Ministry of Road Transport and Highways of India, the number of accident due to poor visibility increasing every year. Hence there is need of robust algorithm to enhance the visibility of the camera feed. In the proposed approach, image dehazing algorithm has been present using dark channel prior. The proposed algorithm is developed for outdoor images. The proposed system processed the image through dark channe

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13

Gao, Yu Nan, Xing Guan Ma, Ping Ping Zhang, and Jin Xiang Fu. "Aniline Removal by Simultaneous PAC Adsorption and Dominant Bacteria Biodegradation." Applied Mechanics and Materials 170-173 (May 2012): 2403–6. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.2403.

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Simultaneous powdered activated carbon(PAC) adsorption and dominant bacteria biodegradation process was evaluated for the aniline pollution accident existing in source water. The jar test results showed the aniline adsorption capacity and adsorption rate of the PAC were represented by the Freundich adsorption isotherm model. The aniline adsorption ability of the PAC was high when the temperature was low; the biological activity of dominant bacteria was high when the temperature was at 25°C and pH value was at 6. The poly-aluminum-chloride in combination with PAC and potassium permanganate in c

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14

Nosovsky, А., A. Guryev, R. Serafyn, and O. Ivaniuk. "Features of Primary-to-Secondary Leak Accident Management Using Control Valve on HPIS Pressure Side." Nuclear and Radiation Safety, no. 2(70) (May 20, 2016): 27–31. http://dx.doi.org/10.32918/nrs.2016.2(70).06.

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The features of primary-to-secondary leak accident progression with high pressure injection system (HPIS) flow control using a control valve (CV) compared with HPIS operation without CV were analyzed within the scope of the revised accident management strategy. The management strategy for primary-to-secondary leak accident designed for symptom-oriented emergency instructions of South Ukrainian NPP unit 3 was taken as a basic strategy. The evaluation of CV efficiency applied two modes for CV (pressurizer filling mode and supporting of margin to saturation in the primary system mode), which have

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15

Villanueva, J. F., S. Carlos, F. Sanchez-Saez, I. Martón, and S. Martorell. "RELAP5 Simulation of PKL Facility Experiments under Midloop Conditions." Science and Technology of Nuclear Installations 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/6140323.

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Nuclear power plant risk has to be quantified in full power and in other modes of operation. This latter situation corresponds to low power and shutdown modes of operation in which the residual heat removal (RHR) system is required to extract the heat generated in the core. These accidental sequences are great contributors to the total plant risk. Thus, it is important to analyze the plant behavior to establish the accident mitigation measures required. In this way, PKL facility experimental series were undertaken to analyze the plant behavior in other modes of operation when the RHR is lost.

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Payami, Ali, and Andre H. Montazem. "Management of Penetrating Maxillofacial Trauma as a Result of Industrial Accident: Report of an Unusual Case." Craniomaxillofacial Trauma & Reconstruction Open 5 (January 1, 2020): 247275122094941. http://dx.doi.org/10.1177/2472751220949413.

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Facial injury as a result of an industrial accident from a stationary saw is rather uncommon; however, such an injury can result in significant damage to vital structures in the maxillofacial region and can even be life-threatening. Expeditious and prompt treatment at the time of such penetrating facial injury results in a favorable outcome. Appropriate care and proper treatment of a patient with penetrating facial injury includes immediate clinical assessment, diagnostic imaging, early wound exploration, removal of the foreign body, wound debridement, repair of hard and soft tissue, and adjun

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17

Chen, Xin. "Simulation Research on the Member Removal Method of the Typical Construction in Collapse Accident." Applied Mechanics and Materials 166-169 (May 2012): 2658–62. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2658.

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Component removal method is usually taken to open up relief channel. It is necessary to make a research on the feasibility of removing and make an analysis on some problems. This paper summarized the typical collapsed buildings and the typical rescue technique used in Wenchuan earthquake. The numerical model of typical buildings collapsed was gotten . Based on the characteristics of the application of removing technique, a numerical analysis was made. The results show that the angle between the component and ground should not be changed. The direction in which the components are lifted should

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18

Kaliatka, A., E. Uspuras, and M. Vaisnoras. "Evaluation of Heat Removal from RBMK-1500 Core Using Control Rods Cooling Circuit." Science and Technology of Nuclear Installations 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/430768.

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The Ignalina nuclear power plant is a twin unit with two RBMK-1500, graphite moderated, boiling water, multichannel reactors. After the decision was made to decommission the Ignalina NPP, Unit 1 was shut down on December 31, 2004, and Unit 2 is to be operated until the end of 2009. Despite of this fact, severe accident management guidelines for RBMK-1500 reactor at Ignalina NPP are prepared. In case of beyond design basis accidents, it can occur that no water sources are available at the moment for heat removal from fuel channels. Specificity of RBMK reactor is such that the channels with cont

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Ham, Jaehyun, Sang Ho Kim, Sung Il Kim, et al. "Source Term Estimation under the SBLOCA-Induced Severe Accident Condition in the SMART." Science and Technology of Nuclear Installations 2021 (April 12, 2021): 1–14. http://dx.doi.org/10.1155/2021/6686615.

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The SMART is a system-integrated modular reactor in which a nuclear steam supply system with a thermal power of 365 MW is contained inside of the reactor vessel. Although the probability is very low, the reactor core can be damaged during a small break loss-of-coolant accident when both the passive safety injection system and the passive residual heat removal system are completely unavailable. In this work, a total of five cases were analyzed considering the reactor vessel condition and the availability of the radioactivity removal tanks and the ancillary containment spray system as containmen

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Kim, Jongtae, Seongho Hong, Ki Han Park, Jin Heok Kim, and Jeong Yun Oh. "Experimental Study on a Hydrogen Stratification Induced by PARs Installed in a Containment." Energies 13, no. 21 (2020): 5552. http://dx.doi.org/10.3390/en13215552.

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Hydrogen can be produced in undesired ways such as a high temperature metal oxidation during an accident. In this case, the hydrogen must be carefully managed. A hydrogen mitigation system (HMS) should be installed to protect a containment of a nuclear power plant (NPP) from hazards of hydrogen produced by an oxidation of the fuel cladding during a severe accident in an NPP. Among hydrogen removal devices, passive auto-catalytic recombiners (PARs) are currently applied to many NPPs because of passive characteristics, such as not requiring a power supply nor an operators’ manipulations. However

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Lin, Chun-Hsien, Chun-Yuan Wang, Ying-Cheng Shen, and Li-Chen Wei. "Clinical Characteristics, Intraoperative Findings, and Surgical Outcomes of Canalicular Laceration Repair with Monocanalicular Stent in Asia." Journal of Ophthalmology 2019 (July 2, 2019): 1–6. http://dx.doi.org/10.1155/2019/5872485.

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Purpose. To report the epidemiological and clinical data as well as surgical outcomes of canalicular lacerations with Mini-Monoka insertion at a tertiary center in Taiwan and to discuss differences in traumatic pattern, pathogenesis, and surgical outcomes between Taiwan and other countries. Methods. From 2009 to 2018, all 48 patients who underwent canalicular laceration repair with Mini-Monoka stent at a tertiary center in Taiwan were retrospectively analyzed. Demographic and clinical data and surgical outcomes were recorded. Results. The mean age of the 48 patients was 38 years. Single lower

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Morozov, Andrej V., Anna V. Pityk, Sergej V. Ragulin, Azamat R. Sahipgareev, Aleksandra S. Soshkina, and Aleksandr S. Shlyopkin. "Estimation influence of boric acid drop entrainment to its accumulation in the VVER reactor in the case of accident." Nuclear Energy and Technology 4, no. 1 (2018): 65–71. http://dx.doi.org/10.3897/nucet.4.29844.

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Process of boric acid mass transfer during accidents accompanied with rupture of circulation pipelines in VVER reactors of new generation equipped with passive safety systems are examined. Results of calculation of variation of boric acid concentration in VVER-TOI reactor in case of accident development process are presented. Positive effects of boric acid droplet entrainment on the processes of acid accumulation and crystallization in the reactor core are demonstrated. The obtained results allow formulating the conclusion on the possibility of these processes in the reactor core which may lea

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Habib, Khadijah, and Cengiz Turkoglu. "Analysis of Aircraft Maintenance Related Accidents and Serious Incidents in Nigeria." Aerospace 7, no. 12 (2020): 178. http://dx.doi.org/10.3390/aerospace7120178.

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The maintenance of aircraft presents considerable challenges to the personnel that maintain them. Challenges such as time pressure, system complexity, sparse feedback, cramped workspaces, etc., are being faced by these personnel on a daily basis. Some of these challenges cause aircraft-maintenance-related accidents and serious incidents. However, there is little formal empirical work that describes the influence of aircraft maintenance to aircraft accidents and incidents in Nigeria. This study, therefore, sets out to explore the contributory factors to aircraft-maintenance-related incidents fr

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Vyshemirsky, M., O. Zhabin, and S. Ostapchuk. "Analysis of SG Feeding by Mobile Pump under Total Blackout of NPP with VVER-1000/320." Nuclear and Radiation Safety, no. 4(72) (November 14, 2016): 25–31. http://dx.doi.org/10.32918/nrs.2016.4(72).04.

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The paper presents the analysis of steam generator feeding by mobile pump under power unit total blackout with loss of heat removal to the ultimate heat sink. Thermohydraulic model of NPP with VVER-1000/320 for RELAP5/MOD3.2 was used in calculations. The assessment of hydraulic loss of mobile pump head was performed based on initial data of Zaporizhzhya NPP Unit 1. Results of thermohydraulic calculations confirmed the effectiveness of SG feeding via mobile pump at an early and late stages of the accident and revealed typical aspects of the transient progression.

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Zhu, Zi Cheng, Xue Jun Zhang, Guo Liang Mou, Chao Xin Li, and Jun You. "Design and Experiment of Thermal Water and Mechanical Deicing Device." Applied Mechanics and Materials 532 (February 2014): 311–15. http://dx.doi.org/10.4028/www.scientific.net/amm.532.311.

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Fast and economical removal of icing snow on the airport runways, road, highways and other roads is a problem for reducing traffic accident rate in frozen weather. Based on the analysis of current researches on various deicing methods, a new deicing method that combines thermal deicing method, water-jet cutting with mechanical deicing technology was presented. This context introduces the construction and working principle of this device, and milling cutting model was constructed, power calculation of milling equipment is also carried out. Subsequently, indoor experiments results was repeated.

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Sunarto, Sunarto, and Addi Mardi Harnanto. "Upaya Meningkatkan Kemampuan Melaksanakan Pertolongan Pertama pada Kecelakaan dengan Pendidikan Kesehatan Helmet Removal." jurnalempathy.com 1, no. 1 (2020): 42–49. http://dx.doi.org/10.37341/jurnalempathy.v1i1.6.

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Background: Head and neck injuries as the etiology of death for road users. then there are efforts to overcome them with protective equipment for the head ie the helmet, the use of the right helmet is expected to reduce the burden of collisions directly to the head. Furthermore, when an accident occurs in a patient who is still wearing a helmet, the helper must understand the technique and how to properly remove the helmet. Purpose this community enganggement is necessary to obtain health education through community service in order to improve their knowledge and skills. Methods: In the implem

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Purohit, Neeraj, Shalina Ray, Tom Wilson, and OP Chawla. "The ‘Parent's Kiss’: An Effective Way to Remove Paediatric Nasal Foreign Bodies." Annals of The Royal College of Surgeons of England 90, no. 5 (2008): 420–22. http://dx.doi.org/10.1308/003588408x300966.

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INTRODUCTION The objectives of this study were to: (i) evaluate the effectiveness of ‘parent's kiss’ as a technique for removal of nasal foreign bodies in children; and (ii) determine whether this technique reduces the number of children requiring general anaesthesia for their removal. PATIENTS AND METHODS This was a prospective observational study in the accident and emergency and ENT departments at Luton and Dunstable Hospital. The participants were 31 children with nasal foreign bodies, under the age of 5 years, presenting via the acute services over a 6-month period. The primary outcome me

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Tani, Kotaro, Yu Igarashi, Eunjoo Kim, Munehiko Kowatari, Takeshi Iimoto, and Osamu Kurihara. "PROBABILISTIC ANALYSES OF 131I THYROID ACTIVITY IN PERSONS WITH SURFACE CONTAMINATION IN DIRECT MEASUREMENT WITH A STANDING-TYPE WHOLE-BODY COUNTER AS AN EMERGENCY RESPONSE IN A RADIOLOGICAL INCIDENT." Radiation Protection Dosimetry 194, no. 2-3 (2021): 65–75. http://dx.doi.org/10.1093/rpd/ncab074.

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Abstract The authors’ previous study suggested that a simple standing-type whole-body counter called FASTSCAN (Canberra, Meriden, CT, USA), widely installed throughout Japan after the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in March 2011, could be used for thyroid measurements in internal dose assessment after a future radiological incident accompanied by the release of 131I into the environment. The present study performed Monte-Carlo simulations using a computational human phantom with several patterns of body surface contamination and used the results to formulate a method fo

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Sorokin, V. V. "Аnalysis Catalytic Hydrogen Recombiner Capacity Calculation Taking into Account Conditions Inside Sealed Enclosure of Containment Safety System of Nuclear Power Plants with Water-Water Energetic Reactor". ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, № 2 (2021): 178–86. http://dx.doi.org/10.21122/1029-7448-2021-64-2-178-186.

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Localizing safety systems are provided to contain radioactive substances in an accident and attenuate ionizing radiation at a modern nuclear power plant. Together with radioactive substances, hydrogen is also retained, which is formed during the decomposition of the primary coolant. The accumulation of hydrogen in the presence of oxygen from the atmosphere in the accident localization zone carries the danger of the formation of flammable and explosive concentrations of these components. Nuclear power plant (NPP) deigns with water-water energetic reactor (WWER) provides for a hydrogen removal s

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Guo, Yanbao, Shuhai Liu, Guibin Tan, Liu Yang, and Deguo Wang. "Removal and tribological behaviors of waxy deposition layer in cleaning process." Industrial Lubrication and Tribology 69, no. 4 (2017): 566–73. http://dx.doi.org/10.1108/ilt-11-2015-0179.

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Purpose The wax deposition in oil wells and pipelines is very viciously negative to the petroleum extraction and crude oil transportation, and it even causes severe blockage accident. This study aims to describe cleaning experiments performed on wax deposition of different deposition layer and experimental conditions to investigate the removal and tribological properties and chip formation. Design/methodology/approach An optical arrangement was used to visually record the cleaning process, whereas the friction forces were measured by a custom-built tribometer. Various measurements were perform

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Masuda, Takahiro, and Sumeet Mittal. "PS01.076: LAPAROSCOPIC REMOVAL OF A SLIPPED ANGELCHIK ANTIREFLUX PROSTHESIS." Diseases of the Esophagus 31, Supplement_1 (2018): 70–71. http://dx.doi.org/10.1093/dote/doy089.ps01.076.

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Abstract Background The Angelchik prosthesis is c-shaped silicone ring designed to prevent acid reflux. The device, which is fitted around the gastroesophageal junction, was popular in 1980s and over 25,000 devices were placed in patients worldwide. However, follow-up showed a high frequency of undesirable results, including device migration and esophageal erosion. The use of this device was therefore abandoned in the early 1990s. Methods A 70-year-old man with a body mass index of 36 kg/m2 presented to us with persistent dysphagia and progressively increasing heartburn. He had undergone place

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Zhou, Bo, Rui Yan, Xiaohan Yu, et al. "Study on Kinetic Characteristics of Krypton and Xenon radioactive source term in molten salt reactor." EPJ Web of Conferences 239 (2020): 22005. http://dx.doi.org/10.1051/epjconf/202023922005.

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A numerical simulation program for the dynamic distribution of krypton and xenon with flow and on-line removal function was established for primary loop system of molten salt reactor(MSR) Based on Mathe-matica7.0.The simulation results of the static burnup was compared with ORIGEN-S program, and the deviation is less than 10%, which is in good agreement.The distribution and dynamic characteristics of krypton and xenon in the primary loop system were analyzed under the flow regionalization and online removal model.The results show that,the static burnup model underestimates the total 135Xe acti

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Dako, Timea, Cristina Ioana Bica, Luminita Lazar, Ana Petra Lazar, and Monica Monea. "Separated Instrument Management as a Procedural Accident in Endodontics Using the EDTA (C10H16N2O8) Aided Bypassing Technique and the Ultrasonic Removal Method. An in vitro Study." Revista de Chimie 71, no. 11 (2020): 73–79. http://dx.doi.org/10.37358/rc.20.11.8375.

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Fracture of endodontic files can be considered a real concern during root canal treatment. This procedural accident is caused both by overusing instruments due to economic reasons and using an incorrect technique in root canals with difficult anatomy. A broken endodontic file does not always regard the treatment as a failure. Frequently the broken fragment can be bypassed, and the root canal treatment completed. In other cases, when the file is separated in a tooth with associated apical disease, its retrieval using ultrasonic tips is advised. Separation of a file usually occurs in molars, mai

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Ahmed, Ashar, Ahmad Farhan Mohd Sadullah, and Ahmad Shukri Yahya. "Effect of Roadside Development on the Safety of Intersections without Signals." Applied Mechanics and Materials 802 (October 2015): 393–98. http://dx.doi.org/10.4028/www.scientific.net/amm.802.393.

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Roadside development plays an important role in the safety of the entire road in general and intersections in particular. Illegal and improper buildouts such as roadside kiosks, bus stops and fire stations are an accident hazard and a hindrance towards sustainable development. This paper presents the first account of analysis of safety evaluation of intersections with respect to roadside development in Malaysia. The data collected on 14 sites was analyzed. The results indicated that the bus stops and restaurants located right infront of the unsignalized intersections were the major contributor

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Lepage, H., O. Evrard, Y. Onda, I. Lefèvre, J. P. Laceby, and S. Ayrault. "Depth distribution of radiocesium in Fukushima paddy fields and implications for ongoing decontamination works." SOIL Discussions 1, no. 1 (2014): 401–28. http://dx.doi.org/10.5194/soild-1-401-2014.

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Abstract. Large quantities of radiocesium were deposited across a 3000 km2 area northwest of the Fukushima Dai-ichi nuclear power plant after the March 2011 accident. Although many studies have investigated the fate of radiocesium in soil in the months following the accident, the potential migration of this radioactive contaminant in rice paddy fields requires further examination after the typhoons that occurred in this region. Such investigations will help minimize potential human exposure in rice paddy fields or transfer of radioactive contaminants from soils to rice. Radionuclide activity c

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Gaikwad, Avinash J., P. K. Vijayan, Sharad Bhartya, et al. "Effect of Coolant Inventories and Parallel Loop Interconnections on the Natural Circulation in Various Heat Transport Systems of a Nuclear Power Plant during Station Blackout." Science and Technology of Nuclear Installations 2008 (2008): 1–11. http://dx.doi.org/10.1155/2008/458316.

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Provision of passive means to reactor core decay heat removal enhances the nuclear power plant (NPP) safety and availability. In the earlier Indian pressurised heavy water reactors (IPHWRs), like the 220 MWe and the 540 MWe, crash cooldown from the steam generators (SGs) is resorted to mitigate consequences of station blackout (SBO). In the 700 MWe PHWR currently being designed an additional passive decay heat removal (PDHR) system is also incorporated to condense the steam generated in the boilers during a SBO. The sustainability of natural circulation in the various heat transport systems (i

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Zabolotny, Dmitry, Erwin Lukach, Diana Zabolotnaya, Fedor Yevchev, Irina Tsvirinko, and Yaroslav Kizim. "Surgical treatment of benign tumors of parapharyngeal space." OTORHINOLARYNGOLOGY 2-3(2) 2019, no. 2-3(2) 2019 (November 29, 2019): 35–40. http://dx.doi.org/10.37219/2528-8253-2019-2-35.

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Background: Neoplasms of the oropharynx and parapharyngeal space are quite rare, characterized by nonspecific development of the disease, and the involvement of important anatomical structures in the pathological process. Problems of diagnosis and choice of tactics of surgical treatment are relevant today. Aim: To evaluate the effectiveness of transoral approach when removing benign tumors of the parapharyngeal space. Materials and methods: In State Institution “O.S. Kolomiychenko Institute of Otolaryngology of National Academy of Medical Sciences of Ukraine” in recent years, 92 patients under

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Medentsov, Andrey, Ekaterina Azarova, and Vitaly Ruchkin. "View of Corpse Found at the Explosion Scene." Legal Concept, no. 2 (July 2020): 77–83. http://dx.doi.org/10.15688/lc.jvolsu.2020.2.11.

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Introduction: in the modern world, the level of international terrorism is constantly growing, with an increasing tendency for terrorists to use an impressive arsenal of weapons of destruction, which creates a real threat to the world community, for all countries without exception. The use of various types of explosive devices in public places – streets, railway stations, and trains – is directed by terrorists to intimidate the population and create a serious threat to stability and security in society. Therefore, at the present stage, it is important to apply all previously developed methods

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Mao, Jiarun, Lei Song, Yuhao Liu, Jiming Lin, Shanfang Huang, and Yaolei Zou. "CFD Analysis of the Passive Decay Heat Removal System of an LBE-Cooled Fast Reactor." Science and Technology of Nuclear Installations 2018 (December 6, 2018): 1–11. http://dx.doi.org/10.1155/2018/4821746.

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This paper presents capacity of the passive decay heat removal system (DHRS) operated under the natural circulation conditions to remove decay heat inside the main vessel of the Lead-bismuth eutectic cooled Fast Reactor (LFR). The motivation of this research is to improve the inherent safety of the LFR based on the China Accelerator Driven System (ADS) engineering project. Usually the plant is damaged due to the failure of the main pumps and the main heat exchangers under the Station Blackout (SBO). To prevent this accident, we proposed the DHRS based on the diathermic oil cooling for the LFR.

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Haddad Junior, Vidal. "Observation of initial clinical manifestations and repercussions from the treatment of 314 human injuries caused by black sea urchins (Echinometra lucunter) on the southeastern Brazilian coast." Revista da Sociedade Brasileira de Medicina Tropical 45, no. 3 (2012): 390–92. http://dx.doi.org/10.1590/s0037-86822012000300021.

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INTRODUCTION: Injuries caused by sea urchins are the most common caused by marine animals in humans in Brazil, with the black sea urchin (Echinometra lucunter) causing the most injuries to bathers. METHODS: This study observed 314 human wounds with emphasis on the early observation of clinical signs and symptoms and their implications on the recommended treatment. RESULTS: All the injuries were caused by black sea urchins and were observed in bathers. The lesions and the pain were associated with penetration of the spines; there was no early inflammation or pain without pressure on the wounded

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Omar Krimech, Mehdi. "Post - Traumatic Hip with Obtu rator Dislocation: Case Report a nd Review of t he Literature." Journal of Orthopaedics & Bone Disorders 2, no. 3 (2018): 1–3. http://dx.doi.org/10.23880/jobd-16000165.

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Introduction: Traumatic dislocation of the coxofemoral joint is defined as the permanent posterior or anterior displacement of the femoral head out of the acetabular cavity. It is generally the consequence of a violent trauma, most often an accident on the public road. o ur case it is a post - traumatic hip obtu rator dislocation, managed in our department. Clinical case and results: 16 years old patient, with no particular history, victim of a road accident, causing a closed trauma to his left hip, right ankle and left wrist. It presents with a vicious attitude: left lower limb in flexion, ab

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Jovanovic, Vesna, Zoran Vukasinovic, Igor Seslija, and Zorica Zivkovic. "Treatment of septic pseudoarthrosis of tibia by Ilizarov method: Case report." Srpski arhiv za celokupno lekarstvo 138, no. 9-10 (2010): 643–46. http://dx.doi.org/10.2298/sarh1010643j.

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Introduction. Septic pseudoarthroses of the tibia represent a relatively frequent complication of open fractures with a large soft tissue damage. They may be localized: in the proximal metaphysis, between the proximal and middle thirds, between middle and distal thirds, in the distal metaphysis. Case Outline. A case of a 52-year-old man with open fracture of the left tibia is presented. He fell from the height of 30 meters. The external fixation according to Mitkovic was performed in another institution. The patient was referred to our hospital nine months after the accident, with clear clinic

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Wang, Michael Y., Chad J. Prusmack, Barth A. Green, J. Peter Gruen, and Allan D. O. Levi. "Minimally Invasive Lateral Mass Screws in the Treatment of Cervical Facet Dislocations: Technical Note." Neurosurgery 52, no. 2 (2003): 444–48. http://dx.doi.org/10.1227/01.neu.0000043814.57539.59.

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Abstract OBJECTIVE The technique of lateral mass screw and rod or plate fixation is a major advancement in the posterior instrumentation of the cervical spine. This technique provides rigid three-dimensional fixation, restores the dorsal tension band, and provides highly effective stabilization in patients with many types of traumatic injuries. METHODS Patient 1 was a 32-year-old man who had been in a motor vehicle accident. He presented with right C5 radiculopathy. X-ray findings included 45% anterolisthesis of C4 on C5, bilateral facet disruption, and right unilateral C4–C5 facet fracture an

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Smirnov, Anton D., Ekaterina V. Bogdanova, Pavel A. Pugachev, et al. "Neutronic modeling of a subcritical system with corium particles and water (from international benchmark)." Nuclear Energy and Technology 6, no. 3 (2020): 155–60. http://dx.doi.org/10.3897/nucet.6.57742.

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After the accident at the Fukushima Daiichi NPP, the attention of the scientific community is riveted on how the consequences are being eliminated. Removing corium – a lava-like resolidified mixture of nuclear fuel with other structural elements of the reactor – remains the most difficult task, the solution of which can take several decades. It is extremely important to exclude the occurrence of any emergency processes during the removal of corium. The purpose of this work was to solve a coordinated hydrodynamic and neutronic problem characterized by a large number of randomly oriented and irr

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Grayson, Jessica W., Sunny S. Khichi, Do-Yeon Cho, Kristen O. Riley, and Bradford A. Woodworth. "Management Strategies for Skull Base Inverted Papilloma." Otolaryngology–Head and Neck Surgery 155, no. 1 (2016): 179–83. http://dx.doi.org/10.1177/0194599816639019.

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Objective Inverted papilloma attached to the ventral skull base presents a surgical dilemma because surgical removal of the bony pedicle is critical to decrease risk of recurrence. The objective of this study is to evaluate the effectiveness of endoscopic management of skull base inverted papilloma. Study Design Case series with planned data collection. Setting Tertiary medical center. Subjects Patients with skull base inverted papilloma. Methods Over 7 years, 49 patients with skull base inverted papilloma were referred for surgical resection. Demographics, operative technique, pathology, comp

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Daigneault, William, and David R. Betters. "A Comparison of the Economic Efficiency of Living and Artificial Snowfence Designs for Road Protection." Western Journal of Applied Forestry 15, no. 2 (2000): 70–74. http://dx.doi.org/10.1093/wjaf/15.2.70.

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Abstract Both artificial and living snowfences are used to protect roads from blowing and drifting snow. This article evaluates and compares the economic performance of three snowfence designs--the Wyoming and double-row slatted artificial snowfences and a three-row living snowfence. The economic analysis evaluates the snowfences by applying four economic performance indicators: total net benefits, present net value, benefit/cost ratio, and annual breakeven benefits. The study uses snow removal savings and accident reduction benefit information from a case study in the state of Wyoming. The ca

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Patrakeeva, Olga. "Prospects for Social and Economic Development of Krasnodar Krai in the Context of National Transport Infrastructural Projects." Regionalnaya ekonomika. Yug Rossii, no. 2 (August 2020): 122–30. http://dx.doi.org/10.15688/re.volsu.2020.2.12.

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The discrepancy between the pace of economic growth rates, needs of enterprises and population for transportation, quality of the road network is a significant infrastructural limitation for growth. The paper is devoted to the analysis of large scale investment projects aimed at the removal of infrastructural restrictions, i.e. the national project “Secure and High-Quality Roads” and “Comprehensive Plan for the Modernization and Expansion of Main Infrastructure”. It is noted that the project “Secure and High-Quality Roads” for Krasnodar Krai will become a prerequisite for the effectiveness of

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Philpott, Andrew, Callum Lawford, Simon C. Lau, Simon Chambers, Michael Bozin, and Andrew Oppy. "Modified Dorsal Approach in the Management of Lisfranc Injuries." Foot & Ankle International 39, no. 5 (2018): 573–84. http://dx.doi.org/10.1177/1071100717750837.

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Background: Open reduction and internal fixation of Lisfranc injuries has typically used multiple longitudinal incisions or a single transverse incision to approach the tarso-metatarsal joint (TMTJ). The incidence of wound-related complications is considerable. We describe a novel single-incision approach that utilizes subcutaneous windows to the medial TMTJ. Methods: A retrospective review identified 150 patients who underwent open reduction and internal fixation for Lisfranc injuries, via the modified dorsal approach, at our center between January 2011 and June 2016. Removal of hardware (ROH

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Fazili, Tasaduq, Ekta Bansal, Dorothy C. Garner, and Vijendra Bajwa. "323. First case of Prosthetic joint infection due to Nocardia veterana-elegans." Open Forum Infectious Diseases 7, Supplement_1 (2020): S234. http://dx.doi.org/10.1093/ofid/ofaa439.519.

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Abstract Background Nocardia are Gram-positive filamentous bacteria that cause Nocardiosis, a rare opportunistic infection. The most common site of infection is the lungs, with metastatic spread usually to the central nervous system. Prosthetic joint infection due to Nocardia is very rare. Methods We report the first case of prosthetic joint infection due to Nocardia veteran-elegans, and review the literature regarding Nocardia septic arthritis, with particular attention to prosthetic joint infection. Results The patient was a 35 year old male with history of Hodgkin’s Lymphoma for which he re

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Ramadhan, Anwar Ilmar, Indra Setiawan, and M. Ivan Satryo. "SIMULASI KARAKTERISTIK ALIRAN DAN SUHU FLUIDA PENDINGIN (H2O) PADA TERAS REAKTOR NUKLIR SMR (SMALL MODULAR REACTOR)." ROTASI 15, no. 4 (2013): 33. http://dx.doi.org/10.14710/rotasi.15.4.33-40.

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Safety is an issue that is of considerable concern in the design, operation and development of a nuclear reactor. Therefore, the method of analysis used in all these activities should be thorough and reliable so as to predict a wide range of operating conditions of the reactor, both under normal operating conditions and in the event of an accident. Performance of heat transfer to the cooling of nuclear fuel, reactor safety is key. Poor heat removal performance would threaten the integrity of the fuel cladding which could further impact on the release of radioactive substances into the environm

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