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Forthcoming and Online First Articles
International Journal of Nuclear Safety and Security
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International Journal of Nuclear Safety and Security (3 papers in press)
The effect of reactor safety containment geometry changes on thermohydraulic parameters at the time of the accident by Farzad Choobdar Rahim, M.M. Sadeghiazad Abstract: With many years in high pressure systems and technology, pipe breaks still occur. The occurrence of this event and analysis of it in a PWR is too important, absolutely in highest grade of danger in a double-ended guillotine type of break. In this paper, the containment volume has changed then variation of pressure and temperature of containment with time has been analysed. This simulation is done with a hand-made computer code. Finally, the results of simulation are compared with plant reports. Keywords: AP1000 reactor; containment; LOCA; two phase; heat transfer; change of volume.
Use of nuclear material accounting and control for augmenting nuclear security: a logical step but challenges remain by K.L. Ramakumar Abstract: A cornerstone of both nuclear safeguards and the State system of accounting for and control of nuclear material (SSAC) is nuclear material accountancy of which nuclear material accounting is a key component. In 2008, the IAEA published Nuclear Material Accounting Handbook for use by States and their organisations in their application of nuclear material accounting. Recognising the important role of NMAC in nuclear security, in 2015 the IAEA published an implementation guide Use of nuclear material accounting and control for nuclear security purposes at facilities. The aim of this paper is to bring out important features of both the publications; one for safeguards and another for nuclear security. This paper also highlights some of the challenges, member States may come across in applying NMAC as we understand from safeguards directly to nuclear security. Keywords: nuclear security; nuclear safeguards; nuclear material accounting and control; SSAC; NMAC system for safeguards; NMAC system for nuclear security; nuclear material accounting handbook. DOI: 10.1504/IJNSS.2021.10032444
The statistical analysis and prediction associated with nuclear meltdown accidents risk evaluation by Bowen He, Qun Guan Abstract: The relevant safety property associated with nuclear meltdown is evaluated from both internal and external factors of reactors using three statistical models: logistic regression model, linear discriminant model, and support vector machines. For each statistical model, the relevant factors that affect the nuclear reactors and probability of nuclear meltdown are evaluated by mathematical statistical analytics. Through the study, the phenomena are found that external factors have the trend to overwhelm inner factors and play a dominant role in the accident. The model analysis and the prediction results presented here could potentially provide nuclear engineers and relevant decision-makers with suggestions on selecting appropriate locations, designs and relevant construction and operation strategy for nuclear reactors from a statistical perspective. Keywords: nuclear meltdown; logistic regression model; linear discriminant model; support vector machines. DOI: 10.1504/IJNSS.2020.10033873