Strategy Evaluation for Cavity Flooding during an ESBO Initiated Severe Accident
Joint Authors
Peng, Minjun
Jiang, Nan
Wei, Wei
Cong, Tenglong
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-02-01
Country of Publication
Egypt
No. of Pages
15
Abstract EN
Intentional depressurization and cavity flooding are two important measures in current severe accident management guidelines (SAMGs).
An extreme scenario of an extended station blackout (ESBO), when electric power is unavailable for more than 24 hours, actually occurred in the Fukushima Daiichi accident and attracted lots of attention.
In an ESBO, the containment spray cannot be activated for condensation, and, thus, cavity flooding will generate a large amount of steam, which, ironically, overpressurizes the containment to failure before the reactor vessel is melted through.
Therefore, consideration of these conflicting issues and the ways in which plants operate is crucial for strengthening the strategies outlined in SAMGs.
In this paper, the effects of intentional depressurization and cavity flooding in an ESBO for a representative 900 MW second-generation pressurized water reactor (PWR) are simulated with MAAP4 code.
Diverse scenarios with different starting times of depressurization and water injection are also compared to summarize the positive and negative impacts for accident mitigation.
The phenomena associated with creep ruptures, hydrogen combustion, corium stratification, and cavity boiling are also analyzed in detail to strengthen our understanding of severe accident mechanisms.
The results point out the facility limitations of second-generation PWRs which can improve existing SAMGs.
American Psychological Association (APA)
Jiang, Nan& Peng, Minjun& Wei, Wei& Cong, Tenglong. 2018. Strategy Evaluation for Cavity Flooding during an ESBO Initiated Severe Accident. Science and Technology of Nuclear Installations،Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1215004
Modern Language Association (MLA)
Jiang, Nan…[et al.]. Strategy Evaluation for Cavity Flooding during an ESBO Initiated Severe Accident. Science and Technology of Nuclear Installations No. 2018 (2018), pp.1-15.
https://search.emarefa.net/detail/BIM-1215004
American Medical Association (AMA)
Jiang, Nan& Peng, Minjun& Wei, Wei& Cong, Tenglong. Strategy Evaluation for Cavity Flooding during an ESBO Initiated Severe Accident. Science and Technology of Nuclear Installations. 2018. Vol. 2018, no. 2018, pp.1-15.
https://search.emarefa.net/detail/BIM-1215004
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1215004