Long-Term Station Blackout Accident Analyses of a PWR with RELAP5MOD3.3
Joint Authors
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-05-08
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Stress tests performed in Europe after accident at Fukushima Daiichi also required evaluation of the consequences of loss of safety functions due to station blackout (SBO).
Long-term SBO in a pressurized water reactor (PWR) leads to severe accident sequences, assuming that existing plant means (systems, equipment, and procedures) are used for accident mitigation.
Therefore the main objective was to study the accident management strategies for SBO scenarios (with different reactor coolant pumps (RCPs) leaks assumed) to delay the time before core uncovers and significantly heats up.
The most important strategies assumed were primary side depressurization and additional makeup water to reactor coolant system (RCS).
For simulations of long term SBO scenarios, including early stages of severe accident sequences, the best estimate RELAP5/MOD3.3 and the verified input model of Krško two-loop PWR were used.
The results suggest that for the expected magnitude of RCPs seal leak, the core uncovery during the first seven days could be prevented by using the turbine-driven auxiliary feedwater pump and manually depressurizing the RCS through the secondary side.
For larger RCPs seal leaks, in general this is not the case.
Nevertheless, the core uncovery can be significantly delayed by increasing RCS depressurization.
American Psychological Association (APA)
Prošek, Andrej& Cizelj, Leon. 2013. Long-Term Station Blackout Accident Analyses of a PWR with RELAP5MOD3.3. Science and Technology of Nuclear Installations،Vol. 2013, no. 2013, pp.1-15.
https://search.emarefa.net/detail/BIM-503370
Modern Language Association (MLA)
Prošek, Andrej& Cizelj, Leon. Long-Term Station Blackout Accident Analyses of a PWR with RELAP5MOD3.3. Science and Technology of Nuclear Installations No. 2013 (2013), pp.1-15.
https://search.emarefa.net/detail/BIM-503370
American Medical Association (AMA)
Prošek, Andrej& Cizelj, Leon. Long-Term Station Blackout Accident Analyses of a PWR with RELAP5MOD3.3. Science and Technology of Nuclear Installations. 2013. Vol. 2013, no. 2013, pp.1-15.
https://search.emarefa.net/detail/BIM-503370
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-503370