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Reports Outline Nuclear Power Study Findings from Korea Atomic Energy Research Institute (Best-practice Severe Accident Analysis for the Opr1000 Short-term Sbo Sequence Using Melcor2.2 and Maap5)

  • Sep 17, 2021 1:23 am GMT
Energy Daily News

2021 SEP 16 (NewsRx) -- By a News Reporter-Staff News Editor at Energy Daily News -- Researchers detail new data in Energy - Nuclear Power. According to news reporting out of Daejeon, South Korea, by NewsRx editors, research stated, “A short-term station blackout (STSBO) accident has been considered as one of risk dominant sequences for nuclear power plants (NPPs). Unless appropriate mitigation actions are not taken, a rapid damage of the reactor core and thereby a severe accident may result in.”

Financial supporters for this research include International Atomic Energy Agency, National Research Foundation of Korea (NRF) - Korean government (MSIT: Ministry of Science and ICT).

Our news journalists obtained a quote from the research from Korea Atomic Energy Research Institute, “This paper presents best practice analysis results on the evolution of the severe accident sequences and fission product (FP) source terms expected during the STSBO accident of a reference pressurized water reactor. In addition, this study aims to analyze the impact of dedicated severe accident mitigation/management actions on the results of interest through the established modeling approach. As the modeling and simulation tools for the analysis, MELCOR2.2 and MAAP5.05, were used to compare the analysis results of interest such as the integrities of the reactor coolant system (RCS) pressure boundary and the reactor/containment building, the generation of flammable gases (such as hydrogen and carbon monoxide), and the environmental release of the FP cesium. As a key finding, this study demonstrated that both codes similarly predicted the environmental release of the FP cesium as well as the general trend of the evolution of the severe accident sequences and plant responses. Of particular interest was the substantial difference in predicting the generation of the flammable gases by the two codes.”

According to the news editors, the research concluded: “Relevant insights are summarized in terms of particular points of interest.”

This research has been peer-reviewed.

For more information on this research see: Best-practice Severe Accident Analysis for the Opr1000 Short-term Sbo Sequence Using Melcor2.2 and Maap5. Annals of Nuclear Energy, 2021;160. Annals of Nuclear Energy can be contacted at: Pergamon-elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; Annals of Nuclear Energy -

Our news journalists report that additional information may be obtained by contacting Kwang-Il Ahn, Korea Atomic Energy Research Institute, 989-111 Daedeok Daero, Daejeon 34057, South Korea. Additional authors for this research include Soo-Yong Park, Wonjun Choi and Sung Joong Kim.

The direct object identifier (DOI) for that additional information is: This DOI is a link to an online electronic document that is either free or for purchase, and can be your direct source for a journal article and its citation.


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