Relevant bibliographies by topics / Nuclear physics, juvenile literature

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Nuclear physics, juvenile literature'

Author: Grafiati
Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Nuclear physics, juvenile literature"

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Trung, Nguyen Ngoc, Nguyen Duy Hung, Nguyen Dinh Minh, Tran Quang Loc, Nguyen-Thi Tam, Ngo Quang Duy, and Nguyen Minh Duc. "Juvenile psammomatoid ossifying fibroma in paranasal sinuses: A case report and literature review." Radiology Case Reports 18, no. 1 (January 2023): 64–69. http://dx.doi.org/10.1016/j.radcr.2022.09.094.

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Suroyo, Indrati, and Taufik Budianto. "The role of diagnostic and interventional radiology in juvenile nasopharyngeal angiofibroma: A case report and literature review." Radiology Case Reports 15, no. 7 (July 2020): 812–15. http://dx.doi.org/10.1016/j.radcr.2020.04.017.

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Viet, Le Anh, Hoang-Thi Kim Khuyen, Dang Quang Hung, Le Hong Chien, Hoang-Van Lan Duc, Nguyen-Thi Mai Anh, Nguyen Hong Hai, Luu-Thi Bich Ngoc, and Nguyen Minh Duc. "Coincidence of juvenile granulosa cell tumor and serous cystadenoma in a pediatric patient: Case report and literature review." Radiology Case Reports 16, no. 9 (September 2021): 2370–75. http://dx.doi.org/10.1016/j.radcr.2021.06.008.

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Wang, Ya-Ting, Yu Zhang, Tao Tang, Chong Luo, Ming-Yue Liu, Li Xu, Li Wang, and Xue-Mei Tang. "Anti-nuclear matrix protein 2+ juvenile dermatomyositis with severe skin ulcer and infection: A case report and literature review." World Journal of Clinical Cases 10, no. 11 (April 16, 2022): 3579–86. http://dx.doi.org/10.12998/wjcc.v10.i11.3579.

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Borni, Mehdi, Fatma Kolsi, Ines Cherif, and Mohamed Zaher Boudawara. "Spontaneous rapid regression of a juvenile primary aneurysmal bone cyst of the skull: A case report and literature review." Radiology Case Reports 17, no. 5 (May 2022): 1634–39. http://dx.doi.org/10.1016/j.radcr.2022.02.037.

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Anandpara, Karan Manoj, Yashant Aswani, Hemangini Thakkar, Priya Hira, and Pragati A. Sathe. "Juvenile Granulosa Cell Tumour of the Ovary with Unilocular Pure Cystic Presentation: A Case Report and Review of Literature." Polish Journal of Radiology 81 (March 21, 2016): 120–24. http://dx.doi.org/10.12659/pjr.896033.

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Hernández-Núñez, Ismael, Ana Quelle-Regaldie, Laura Sánchez, Fátima Adrio, Eva Candal, and Antón Barreiro-Iglesias. "Decline in Constitutive Proliferative Activity in the Zebrafish Retina with Ageing." International Journal of Molecular Sciences 22, no. 21 (October 28, 2021): 11715. http://dx.doi.org/10.3390/ijms222111715.

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It is largely assumed that the teleost retina shows continuous and active proliferative and neurogenic activity throughout life. However, when delving into the teleost literature, one finds that assumptions about a highly active and continuous proliferation in the adult retina are based on studies in which proliferation was not quantified in a comparative way at the different life stages or was mainly studied in juveniles/young adults. Here, we performed a systematic and comparative study of the constitutive proliferative activity of the retina from early developing (2 days post-fertilisation) to aged (up to 3–4 years post-fertilisation) zebrafish. The mitotic activity and cell cycle progression were analysed by using immunofluorescence against pH3 and PCNA, respectively. We observed a decline in the cell proliferation in the retina with ageing despite the occurrence of a wave of secondary proliferation during sexual maturation. During this wave of secondary proliferation, the distribution of proliferating and mitotic cells changes from the inner to the outer nuclear layer in the central retina. Importantly, in aged zebrafish, there is a virtual disappearance of mitotic activity. Our results showing a decline in the proliferative activity of the zebrafish retina with ageing are of crucial importance since it is generally assumed that the fish retina has continuous proliferative activity throughout life.
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Hemke, Robert, Nele Herregods, Jacob L. Jaremko, Gunnar Åström, Derk Avenarius, Fabio Becce, Dennis K. Bielecki, et al. "Imaging assessment of children presenting with suspected or known juvenile idiopathic arthritis: ESSR-ESPR points to consider." European Radiology 30, no. 10 (May 12, 2020): 5237–49. http://dx.doi.org/10.1007/s00330-020-06807-8.

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Abstract Juvenile idiopathic arthritis (JIA) is the most common paediatric rheumatic disease. It represents a group of heterogenous inflammatory disorders with unknown origin and is a diagnosis of exclusion in which imaging plays an important role. JIA is defined as arthritis of one or more joints that begins before the age of 16 years, persists for more than 6 weeks and is of unknown aetiology and pathophysiology. The clinical goal is early suppression of inflammation to prevent irreversible joint damage which has shifted the emphasis from detecting established joint damage to proactively detecting inflammatory change. This drives the need for imaging techniques that are more sensitive than conventional radiography in the evaluation of inflammatory processes as well as early osteochondral change. Physical examination has limited reliability, even if performed by an experienced clinician, emphasising the importance of imaging to aid in clinical decision-making. On behalf of the European Society of Musculoskeletal Radiology (ESSR) arthritis subcommittee and the European Society of Paediatric Radiology (ESPR) musculoskeletal imaging taskforce, based on literature review and/or expert opinion, we discuss paediatric-specific imaging characteristics of the most commonly involved, in literature best documented and clinically important joints in JIA, namely the temporomandibular joints (TMJs), spine, sacroiliac (SI) joints, wrists, hips and knees, followed by a clinically applicable point to consider for each joint. We will also touch upon controversies in the current literature that remain to be resolved with ongoing research. Key Points • Juvenile idiopathic arthritis (JIA) is the most common chronic paediatric rheumatic disease and, in JIA imaging, is increasingly important to aid in clinical decision-making. • Conventional radiographs have a lower sensitivity and specificity for detection of disease activity and early destructive change, as compared to MRI or ultrasound. Nonetheless, radiography remains important, particularly in narrowing the differential diagnosis and evaluating growth disturbances. • Mainly in peripheral joints, ultrasound can be helpful for assessment of inflammation and guiding joint injections. In JIA, MRI is the most validated technique. MRI should be considered as the modality of choice to assess the axial skeleton or where the clinical presentation overlaps with JIA.
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O'Har, George M. "The Nuclear Muse: Literature, Physics, and the First Atomic Bombs (review)." Technology and Culture 42, no. 2 (2001): 377–78. http://dx.doi.org/10.1353/tech.2001.0077.

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Tolentino, Elen S., Bruna Stuchi Centurion, Kellen Cristine Tjioe, Ana Regina Casaroto, Priscila Lie Tobouti, Ulisses Frederigue Junior, Vanessa Soares Lara, José Humberto Damante, Eduardo Sant'ana, and Eduardo Sanches Gonçales. "Psammomatoid juvenile ossifying fibroma: an analysis of 2 cases affecting the mandible with review of the literature." Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology 113, no. 6 (June 2012): e40-e45. http://dx.doi.org/10.1016/j.oooo.2011.08.005.

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Dissertations / Theses on the topic "Nuclear physics, juvenile literature"

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Miranker, Emily. "An Infinity of Questions: Dramatizing Science on Stage." Oberlin College Honors Theses / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1212179899.

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Miháliková, Veronika. "Pojetí vědy ve vybraných románech Simona Mawera." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-346775.

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The aim of this thesis is to explore Simon Mawer's approach to science and to compare the roles of science in his novels Mendel's Dwarf and The Girl Who Fell from the Sky. The description of author's life and its influence on his work with emphasis on the scientific aspects is provided and his opinion on the relationship between science and literature given. The difference between fiction with aspects of science and science fiction is explained and other authors who deal with science in their fiction are exemplified. As Mendel's Dwarf employs genetics and eugenics and The Girl Who Fell from the Sky nuclear physics, the brief development of these scientific fields is described.
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Books on the topic "Nuclear physics, juvenile literature"

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Henderson, Harry. Nuclear physics. New York: Facts on File, 1998.

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Cooper, Christopher. The basics of nuclear physics. New York: Rosen Publishing, 2015.

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Bortz, Alfred B. The neutrino. New York: Rosen Pub. Group, 2004.

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Gillard, Arthur. Nuclear power. Farmington Hills, MI: Greenhaven Press, 2012.

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Stwertka, Albert. Recent revolutions in physics: The subatomic world. New York: F. Watts, 1985.

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Fields, B. H. Understanding neutrons. New York: Cavendish Square, 2016.

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Cooper, Dan. Enrico Fermi: And the revolutions in modern physics. New York: Oxford University Press, 1999.

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Stwertka, Albert. The world of atoms and quarks. New York: Twenty-First Century Books, 1995.

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Fox, Karen. The chain reaction: Pioneers of nuclear science. New York: Franklin Watts, 1998.

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Berger, Melvin. Our atomic world. New York: F. Watts, 1989.

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Book chapters on the topic "Nuclear physics, juvenile literature"

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Nie, Liming, Sa Liu, Xiukun Wu, and Zhe Li. "Analysis of Nuclear Power Economy and Its Influencing Factors." In Springer Proceedings in Physics, 121–32. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_12.

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AbstractThe improvement of nuclear power economy is indispensable to the safe and efficient development of nuclear power. This paper explores the scope of economic evaluation of nuclear power based on literature and actual project operation. The evaluation scope includes power plant level, grid level and external level and this paper proposes a corresponding evaluation indicators based on the above analysis. This paper qualitatively analyzes the characteristics and influencing factors of nuclear power economy based on the current situation of nuclear power economy in China. Considering the difference between economic evaluation standard and actual operation, the typical influencing factors of economic evaluation indicators of power plant level are quantitatively evaluated. The economy of grid level and external level is analyzed by referring to foreign literature. Finally, suggestions on improving the economic efficiency of nuclear power are put forward from the aspects of economic evaluation standards and policies.
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Zhao, Zixiang, Zhongdi Duan, Hongxiang Xue, Yuchao Yuan, and Shiwen Liu. "Effects of Inlet Conditions on the Two-Phase Flow Water Hammer Transients in Elastic Tube." In Springer Proceedings in Physics, 955–72. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_81.

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AbstractTwo-phase flow water hammer events occur in the pipelines of the nuclear power systems and lead to transient and violent pressure shock to tube structures. For the sake of operation safety, the occurrence and severity of the two-phase water hammer should be carefully assessed. This paper presents a parameter analysis of the inlet conditions on the two-phase flow water hammer transients, with considering the elastic effect of the tube walls. A numerical model is established for the vapor-liquid two-phase flow based on the two-fluid six-equation modelling approach, with incorporating correlations and criterions for two-phase flow regime, interfacial interactions and heat transfer. The governing equations are transformed to matrix form expressed by characteristic variables, and solved using the splitting operator method and the total variation diminishing scheme. The accuracy of the model is verified against the experimental data in open literature. Then, the model is applied to investigate the effect of inlet velocity and inlet water temperature on the two-phase flow water hammer transients. The simulation results show that the increase of inlet velocity increases the pressure peak values and brings forward the onset of water hammer, and the increase of inlet temperature decreases the pressure shock. A comparison of the water hammer results between the elastic tube and rigid tube is further presented, and the effect of the elastic modulus on the water hammer is analyzed. The results also show that the pressure peak is largely affected by the tube diameter.
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Mariani, Maria Anna. "Preserve the Capacity to Not Act." In Italian Literature in the Nuclear Age, 136–60. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/oso/9780192868855.003.0005.

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Abstract This chapter delves into the responsibility borne by nuclear physicists, through Sciascia’s The Mystery of Majorana. Standing midway between investigative writing and secular hagiography, The Mystery of Majorana idealizes its protagonist—a brilliant physicist in Enrico Fermi’s research group who disappeared mysteriously, leaving behind him a trail of contradictory clues—to the point of whitewashing him. According to Sciascia, the only possible reason for Majorana’s disappearance is that he foresaw the destruction portended by the atomic bomb. His withdrawal from the world is the radical act of a saint who renounces everything in order to prevent the bomb from being built and ensure humanity’s survival. In telling Majorana’s story, Sciascia fashions a moral allegory that spurs the reader to meditate on the concept of complicity. His objective is also to condemn Italian physics for its responsibility in developing nuclear technology.
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KOMAROV, Vyacheslav V., and Valery P. MESHCHANOV. "Two-dimensional Periodic Structures for Frequency Selection of Signals." In Modern Radio Signals Filtering Devices Methods, Technologies, & Structures, 304–19. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815196504124010012.

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Two-dimensional (2D) periodic structures of the microwave and terahertz ranges are becoming more and more widespread as the basic elements of instruments and devices for controlling the parameters of electromagnetic signals in radio astronomy, nuclear physics, medical technologies, electronic engineering, instrumentation, and radar technology. They are known in the literature as “Frequency Selective Surfaces” (FSS). Their electrodynamic performance depends not only on the geometric dimensions and physical properties of materials but also on the periodical spacing of their constituent elements. In the case when their dimensions are much less than the wavelength of the incident radiation, they are called “metasurfaces”. This chapter analyzes the effect of dimensions and electrophysical properties of structural materials on the transfer characteristics of frequency-selective surfaces with crossshaped apertures.
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Nitzan, Abraham. "The Spin–Boson Model." In Chemical Dynamics in Condensed Phases. Oxford University Press, 2006. http://dx.doi.org/10.1093/oso/9780198529798.003.0018.

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In a generic quantum mechanical description of a molecule interacting with its thermal environment, the molecule is represented as a few level system (in the simplest description just two, for example, ground and excited states) and the environment is often modeled as a bath of harmonic oscillators. The resulting theoretical framework is known as the spin–boson model, a term that seems to have emerged in the Kondo problem literature (which deals with the behavior of magnetic impurities in metals) during the 1960s, but is now used in a much broader context. Indeed, it has become one of the central models of theoretical physics, with applications in physics, chemistry, and biology that range far beyond the subject of this book. Transitions between molecular electronic states coupled to nuclear vibrations, environmental phonons, and photon modes of the radiation field fall within this class of problems. The present chapter discusses this model and some of its mathematical implications. The reader may note that some of the subjects discussed in Chapter 9 are reiterated here in this more general framework. In Sections 2.2 and 2.9 we have discussed the dynamics of the two-level system and of the harmonic oscillator, respectively. These exactly soluble models are often used as prototypes of important classes of physical system. The harmonic oscillator is an exact model for a mode of the radiation field and provides good starting points for describing nuclear motions in molecules and in solid environments. It can also describe the short-time dynamics of liquid environments via the instantaneous normal mode approach. In fact, many linear response treatments in both classical and quantum dynamics lead to harmonic oscillator models: Linear response implies that forces responsible for the return of a system to equilibrium depend linearly on the deviation from equilibrium—a harmonic oscillator property! We will see a specific example of this phenomenology in our discussion of dielectric response in Section 16.9.
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Chang, Hasok. "Scientific Realism and Chemistry." In Essays in the Philosophy of Chemistry. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780190494599.003.0018.

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SCIENTIFIC REALISM Is a philosophical issue with relevance to all sciences, but there are some particularly interesting and distinctive ways in which it has manifested itself in chemistry. Paying proper attention to such aspects will deliver two types of benefits: First, it will aid the philosophical understanding of the nature of chemical knowledge; second, it will throw some fresh light on the realism debate in places where it has developed without much attention to chemical practices and chemical concepts. In the following discussion I will attempt to make a reasonably comprehensive survey of relevant literature, while also advancing some original points and viewpoints. Recall Bas van Fraassen’s now-classic formulation of the realism debate as an argument about whether we can know about unobservable entities featuring in scientific theories, and whether we should try to know about them (van Fraassen 1980). If this is how we understand realism, and if we take the long view of the history of science, chemistry is the most important science to consider in the realism debate. Until the development of atomic, nuclear, and elementary-particle physics starting in the early twentieth century, chemistry was the science in which debates about the epistemic and ontological status of unobservable theoretical entities took place with most ferocity and most relevance to practice. An interesting contrast is astronomy, in which the Copernican Revolution brought in a long and secure phase of realism about astronomical objects far out of reach of any human senses (including those that do not even register as tiny specks of light to our eyes). In contrast, the achievements of chemistry up to the early nineteenth century only deepened the sense of inaccessibility and unobservability concerning the putative fundamental entities postulated in chemical theories. Unobservability in relation to chemical theories is not only an issue about atomism, though surely the problem was clearly present with the atomistic particles imagined by a wide range of thinkers from Democritus and Leucippus of ancient times to Descartes and other early-modern mechanical philosophers.
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"Both opponents and proponents of food irradiation have been sources of misinformation or valid information presented in a misleading way (20). As described by a leading British consumer representative: “ The battle to get irradiation of food accepted as a beneficial food processing technique has been waged for some 30 years. It is an interesting case of warring factions glaring at each other across a gulf of incomprehension” ( ). In this book an attempt will be made to provide factual data as a basis for a more rational approach to these controversies. The seminar jointly held by IOCU (International Organization of Consumer Unions) and ICGFI (International Con­ sultative Group on Food Irradiation) in 1993 (22) has raised hopes that this gulf of incomprehension can be narrowed, perhaps even closed. There is voluminous scientific literature on food irradiation, but it is not easy to come by because contributions have come from so many disciplines. Relevant reports have been published in journals of food technology, nutrition, microbiol­ ogy, analytical chemistry, food chemistry, radiation chemistry, radiation physics, toxicology, health physics, and other fields. There is only one scientific journal devoted exclusively to food irradiation research: Shokuhin-Shosha (Food Irradia­ tion, Japan), published by the Japanese Research Association for Food Irradiation since 1965; articles are in Japanese, with English abstracts. In order to facilitate access to this literature a computerized irradiation information database called IRREFCO (Irradiation Reference Collection) has been installed at the National Agricultural Library in the United States. It is initially aimed at making available the research contract reports generated in programs sponsored by the U. S. Army and U. S. Atomic Energy Commission in the 1950s and 1960s. Those reports are not accessible through ordinary library services. A selected annotated bibliogra­ phy is offered since 1993 (23). A bibliography on food irradiation has been prepared since 1955 by the Federal Research Center for Nutrition, Karlsruhe, Germany; it now contains over 10,000 documents. The whole database is pro­ cessed and stored on computer, and is also available in printed form. In recent years one issue of the printed bibliography has been published annually, each with 300-600 references (24). In the following chapters only a small fraction of these documents can be mentioned. The author endeavors to quote primarily those studies that will guide the reader to key issues, to review articles, and to other works showing a path to the remaining literature. Useful documentation of developments in food irradiation research can be found in three newsletters. Food Irradiation Quarterly International Newsletter (Saclay) was published in English and French by the European Information Center for Food Irradiation, Saclay, France, from 1960 to 1971. The International Project in the Field of Food Irradiation issued Food Irradiation Information (Karlsruhe) from 1972 until 1982. The Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, International Atomic Energy Agency, has Published Food Irradiation Newsletter (Vienna) since 1976." In Safety of Irradiated Foods, 24–26. CRC Press, 1995. http://dx.doi.org/10.1201/9781482273168-18.

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Conference papers on the topic "Nuclear physics, juvenile literature"

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Gorbatov, S., and V. Polunichev. "Pressure compensation systems in the primary circuit of a nuclear power plant with a pressurized water reactor." In International Conference "Computing for Physics and Technology - CPT2020". ANO «Scientific and Research Center for Information in Physics and Technique», 2020. http://dx.doi.org/10.30987/conferencearticle_5fd755c0372249.17562714.

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A pressure compensator is a technical pressure vessel with a special design that compensates for changes in the volume of water in a closed loop when it is heated. It is a design feature of two-circuit reactors with pressurized water as a coolant (including heavy water reactors) used at nuclear power plants, nuclear submarines and ships and is usually considered as part of a technological system that maintains the pressure in the primary circuit in stationary modes and pressure deviations in transient and emergency modes of the reactor plant. The pressure compensator is at the same time a system for providing the required pressure and compensating for changes in the volume of the coolant in the primary circuit, therefore it has a double name - in technical documentation and literature it can be called both a pressure compensator and a volume compensator.
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Arigi, Awwal, Ibrahim Aliyu, and Jinsul Kim. "A preliminary analysis of a nuclear power plant startup for a physics-based model of a digital twin." In Intelligent Human Systems Integration (IHSI 2024) Integrating People and Intelligent Systems. AHFE International, 2024. http://dx.doi.org/10.54941/ahfe1004513.

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Digital twins are a new paradigm that can revolutionize the way we work and manage complex systems due to its varied capabilities including, remote monitoring, controls, and prediction. Models are often used in engineering to represent the physical properties of the system concerned. However, the human is a fundamental part of nuclear power plant system function. Thus, a model is considered that will adequately represent not only the physical properties but the function of the human as well. The startup operation of a NPP is a representative process where the human plays a crucial role in the success of the operation. This paper shows a preliminary analysis of a representative NPP where the knowledge of the physical parameters and realistic operational functions have been leveraged for a potential digital twin. The work is based on a set of parameters defined in literature including, the physical data, the observable data, the physical inputs, the digital inputs, and others. The aim is to develop a comprehensive probabilistic digital twin model of the desired system.
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Feng, Beibei, Darong Chen, Xingtuan Yang, and Shengyao Jiang. "Prospective Applications of Flow Drag and Noise Reduction Technology for Nuclear Reactors." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-15427.

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Flow drag and noise reduction technology is a multidisciplinary field currently relative to hydrodynamics, materials and physics. A comprehensive review of the literature on the principles, limitations and engineering applications of the technology was performed in this paper. Due to restriction of experimental conditions, it is rarely adopted to use to reduce flow resistance associated with noise for nuclear reactors. Assessment of effects of flow drag and noise reduction on circulation efficiency of cooling water and helium gas was done based on riblet structured surface, which would efficiently reduce the flow resistance and noise with high reduction rate and was available to realize for nuclear reactors. Results of this analysis showed that vortex induced in riblet grooves was the dominant factor resulting in flow drag and noise reduction on the riblet structured pipeline inner wall of cooling water and helium gas. Accordingly, higher circulation efficiency and heat transfer efficiency would eventually lead to better performance of nuclear reactors.
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Wrigley, Paul, Paul Wood, Paul Stewart, Richard Hall, and Dan Robertson. "Design for Plant Modularisation: Nuclear and SMR." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81760.

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The UK Small Modular Reactor (UKSMR) programme has been established to develop an SMR for the UK energy market. Developing an SMR is a multi-disciplinary technical challenge, involving nuclear physics, electrical, mechanical, design, management, safety, testing to name but a few. In 2016 Upadhyay & Jain performed a literature review on modularity in Nuclear Power. They concluded that although modularisation has been utilised in nuclear to reduce costs, more work needs to be done to “create effective modules”. Hohmann et al also concluded the same for defining modules in the chemical process plant industry. The aim of this paper is to further define modules with a particular focus on an SMR for the UK market, the UKSMR. The methods highlighted may be relevant and applied to other international SMR designs or other types of plant. An overview and examination of modularisation work in nuclear to date is provided. The different configurations are defined for the Nuclear Steam Supply System (NSSS) in primary circuits and then for Balance of Plant (BOP) modules. A top level design process has been defined to aid in the understanding of design choices for current reactors and to further assist designing balance of plant modules. The paper then highlights areas for additional research that may further support module design and definition.
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Jiang, S., M. Perez-Ferragut, Z. Fu, and J. K. Hohorst. "Application of RELAP/SCDAPSIM/MOD4.1 to the Analysis of Advanced Reactor/Fluid Systems With Liquid Molten Salt in the Presence of Non-Condensable Gases." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82041.

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In recent years, organizations both at home and abroad are actively carrying out a research on the Molten Salt Reactor systems (MSRs). For example, the Shanghai Institute of Applied Physics (SINAP), Chinese Academy of Science (CAS), is currently involved in the design and development of a 10MWth Solid Fuel Thorium Molten Salt Reactor (TMSR-SF1). SINAP started their analysis of TMSR using an earlier version of RELAP/SCDAPSIM, MOD4.0. MOD4.0 included models and correlations for molten salts but was unable to treat molten salts in the presence of non-condensable gases. Since that time SINAP and ISS have worked in parallel to extend the models and correlations for such systems. The SINAP modified code, using SINAP proprietary models and correlations, is described in the “open literature” under the name RELAP5-MSR. More general, but comparable, models developed by ISS for liquid metals/salts in the presence of non-condensable have been incorporated into RELAP/SCDAPSIM/MOD4.1. This extended option is currently being implemented for Li-Pb, Pb-Bi, molten salts, and Na.
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Di Lecce, Francesco, Sandra Dulla, Piero Ravetto, Antonio Cammi, Stefano Lorenzi, and Carlo Fiorina. "CFD-Based Correlation for Forced Convection Heat Transfer in Circular Ducts of Internally Heated Molten Salts." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82507.

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Heat transfer phenomena involving internally heated fluid flows are of particular interest in several industrial applications, in chemical plants as in the nuclear field. This topic is relevant for the development of the Molten Salt Reactors (MSRs) since it involves the safety characteristics of the liquid molten salt fuel. In the literature, there is a lack of systematic studies on the heat transfer mechanism and correlations for flows in ducts featuring an internal heat source, apart from some analytical studies performed in Fiorina et al., “Thermal-hydraulics of internally heated molten salts and application to the MSFR”, Journal of physics, Conference series 501 (2014). In this work, the Nusselt number is computed multiplying the traditional Nu for internal flows times a corrective factor to account for the internal heat source. As a main outcome of this work, it is possible to obtain a CFD-based improved estimate of the corrective factor correlation for turbulent flow regime with respect to the work by Fiorina. The numerical CFD analysis is performed with the open source code Open FOAM. Despite its simplicity, the method is general and applicable for any geometrical and thermal situations.
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McNelles, Phillip, and Lixuan Lu. "A Review of the Current State of FPGA Systems in Nuclear Instrumentation and Control." In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16819.

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A Field Programmable Gate Array, or FPGA, is a form of integrated circuit that is programmed (configured) after it has been built. These devices have recently become a topic of interest for various applications in the nuclear field. Most of the recent work put into these FPGA systems is for the purpose of Instrumentation and Control (I&C) systems, but other applications include health physics, particle detectors, and pulse measurement systems. These new FPGA based systems are thought of as possible replacements for older, analog systems that are commonly used in Nuclear Power Plants (NPPs). Many of these systems are becoming obsolete, and it can be difficult to repair and maintain them. FPGAs possess certain advantages over traditional analog circuits, as well as microprocessors, for nuclear I&C applications. This paper provides an extensive literature survey on the current research into FPGA-based systems in NPP applications, such as shutdown systems, neutron monitors, and feedwater controls. Current plans and plans for future FPGA implementations are also discussed. Research from different countries in North America, Europe and Asia is discussed, covering a variety of NPP types (CANDU, Pressurized Water Reactors, Boiling Water Reactors, etc.). The main companies and organizations involved in the FPGA research and development are examined, and a direction for future research is presented.
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8

Xiao, Jianjun, John R. Travis, and Wolfgang Breitung. "Non-Boussinesq Integral Model for Horizontal Turbulent Strongly Buoyant Plane Jets." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48169.

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Horizontal buoyant jets are fundamental flow regimes for hydrogen safety analyses in the nuclear power plants. Integral model is an efficient, fast running engineering tool that can be used to obtain the jet trajectory, centerline dilution and other properties of the flow. In the published literature, most of the integral models that are used to predict the horizontal buoyant jet behavior employ the Boussinesq approximation, which limits the density range between the jets and the ambient. CorJet, a long researched, developed, and established commercial model, is such a Boussinesq model, and has proved to be accurate and reliable to predict the certain buoyant jet physics. In this study, Boussinesq and non-Boussinesq integral models with modified entrainment hypothesis were developed for modeling horizontal turbulent strongly buoyant plane jets. All the results and data where the Boussinesq model is valid will collapse to CorJet when they are properly normalized, which implies that the calculation is not sensitive to density variations in Boussinesq model. However, non-Boussinesq results will never collapse to CorJet analyses using the same normalized scaling, and the results are dependent on the density variation. The reason is that CorJet employs the Boussinesq approximation in which density variations are only important in the buoyancy term. For hydrogen safety analyses, the large density variation between hydrogen and the ambient, which is normally the mixture of air and steam, will make the Boussinesq approximation invalid, and the effect of the density variation on the inertial mass of the fluid can not neglected. This study highlights the assumption of the Boussinesq approximation as a limiting, simplified theory for strongly buoyant jets. A generalized scaling theory for horizontal strongly buoyant jet seems not to exist when the Boussinesq approximation is not applicable. This study also reveals that the density variation between jets and the ambient should be less than 10% to accurately model horizontal buoyant jets when the Boussinesq approximation is applied. Verification of this integral model is established with available data and comparisons over a large range of density variations with the CFD codes GASFLOW and Fluent. The model has proved to be an efficient engineering tool for predicting horizontal strongly buoyant plane jets.
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9

Gupta, Sahil, Amjad Farah, Krysten King, Sarah Mokry, and Igor Pioro. "Developing New Heat-Transfer Correlation for SuperCritical-Water Flow in Vertical Bare Tubes." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-30024.

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This paper presents an analysis of heat transfer in water at supercritical conditions in bare vertical tubes. A large dataset within conditions similar to those of SuperCritical Water-cooled nuclear Reactors (SCWRs) was obtained from the Institute for Physics and Power Engineering (Obninsk, Russia). This dataset was compared to existing heat-transfer correlations from the open literature. This comparison is an extension to the previous studies done with this dataset. Previous studies have shown that existing correlations, such as the Dittus-Boelter correlation significantly overestimates the experimental heat transfer coefficient (HTC) values within the pseudocritical range; the Bishop et al. and Jackson’s correlations were also found to deviate significantly from the experimental data. The Swenson et al. correlation provided a better fit for the experimental data, as compared to the previous three correlations within some flow conditions, but deviates from data for other conditions. HTC and wall temperature values calculated with the FLUENT CFD code also deviate from the experimental data within some conditions. After analyzing the existing correlations, it was decided to develop a better correlation for predicting HTC. Since the Swenson et al. correlation seems to be the best candidate for predicting the experimental data; it was selected as a basis for developing a new empirical correlation. The primary difference of the Swenson et al. approach is that it uses the majority of thermophysical properties at the wall temperature as opposed to those used at bulk-fluid temperatures in other models. Calculating various thermophysical properties based on wall temperature seems to give much better results in terms of accuracy. To obtain a basic empirical correlation, a dimensional analysis was conducted using a combination of various dimensionless terms. This approach was combined with the experimental dataset at the normal heat-transfer regime using statistical analysis. The final correlation showed the best fit for the experimental dataset within a wide range of flow conditions. The calculated wall temperatures were within (±15%) for the analyzed dataset, which is a considerable improvement from the previous correlations. The accuracy of calculated values was further improved when a term was added to the correlation that accounted for the entrance effect in bare tubes. Thus, the new correlation presented in this paper can be used for HTC calculations in supercritical-water heat exchangers at SCW Nuclear Power Plants (NPPs) in case of the indirect cycle, in heat exchangers for co-generation of hydrogen from supercritical water side, for a preliminary heat-transfer calculations in SCWR fuel channels as a conservative approach. It can also be used for future comparisons with other independent datasets, with bundled data, for the verification of computer codes for SCWR core thermalhydraulics and for the verification of scaling parameters between water and modeling fluids.
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Faucett, Chris, Bradley Beeny, and Karen Vierow Kirkland. "MELCOR Modeling of Combined Accident Tolerant Fuel and Reactor Core Isolation Cooling System Operation." In 2020 International Conference on Nuclear Engineering collocated with the ASME 2020 Power Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/icone2020-16409.

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Abstract The work presented in this paper presents new techniques for modeling the combined use of the Reactor Core Isolation Cooling (RCIC) System and Accident Tolerant Fuel (ATF) in a Boiling Water Reactor (BWR). With guidance from Sandia National Laboratories’ Severe Accident Analysis department, a MELCOR BWR model was developed from open source literature. The demonstration shown herein simulates BWR long-term station blackout (LTSBO) conditions with the Nuclear Regulatory Commission’s (NRC) MELCOR severe accident analysis code. By combining state-of-the-art MELCOR modeling practices with new, physics-based RCIC System and ATF MELCOR inputs, this BWR model provides a contemporary platform for BWR severe accident simulations. The authors are investigating the combined use of the RCIC System and ATF as a means of passively enhancing reactor safety. The benefits of this approach were evaluated by performing simulations using traditional fuel designs (i.e. Zircaloy cladding) and ATF with an iron-chromium-aluminum (FeCrAl) clad under BWR LTSBO conditions. ATF performance was evaluated using severe accident metrics, specifically event sequence timings and the hydrogen production rate from cladding oxidation. Preliminary results show delayed core degradation timelines with less hydrogen production for ATF simulations. Although the results are limited in scope, the presented analysis could easily be expanded to a full-scale uncertainty study that considers a range of severe accident boundary conditions. This paper describes objective technical results and analysis. Any subjective views or opinions that might be expressed in the paper do not necessarily represent the views of the U.S. Department of Energy or the United States Government.
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