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Assessment of Severe Accident Depressurization Valve Activation Strategy for Chinese Improved 1000 MWe PWR
Joint Authors
Source
Science and Technology of Nuclear Installations
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-26
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
To prevent HPME and DCH, SADV is proposed to be added to the pressurizer for Chinese improved 1000 MWe PWR NPP with the reference of EPR design.
Rapid depressurization capability is assessed using the mechanical analytical code.
Three typical severe accident sequences of TMLB’, SBLOCA, and LOFW are selected.
It shows that with activation of the SADV the RCS pressure is low enough to prevent HPME and DCH.
Natural circulation at upper RPV and hot leg is considered for the rapid depressurization capacity analysis.
The result shows that natural circulation phenomenon results in heat transfer from the core to the pipes in RCS which may cause the creep rupture of pipes in RCS and delays the severe accident progression.
Different SADV valve areas are investigated to the influence of depressurization of RCS.
Analysis shows that the introduction of SADV with right valve area will delay progression of core degradation to RPV failure.
Valve area is to be optimized since smaller SADV area will reduce its effect and too large valve area will lead to excessive loss of water inventory in RCS and makes core degradation progression to RPV failure faster without additional core cooling water sources.
American Psychological Association (APA)
Shao, Ge& Tong, Lili& Cao, Xuewu. 2013. Assessment of Severe Accident Depressurization Valve Activation Strategy for Chinese Improved 1000 MWe PWR. Science and Technology of Nuclear Installations،Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-498636
Modern Language Association (MLA)
Shao, Ge…[et al.]. Assessment of Severe Accident Depressurization Valve Activation Strategy for Chinese Improved 1000 MWe PWR. Science and Technology of Nuclear Installations No. 2013 (2013), pp.1-8.
https://search.emarefa.net/detail/BIM-498636
American Medical Association (AMA)
Shao, Ge& Tong, Lili& Cao, Xuewu. Assessment of Severe Accident Depressurization Valve Activation Strategy for Chinese Improved 1000 MWe PWR. Science and Technology of Nuclear Installations. 2013. Vol. 2013, no. 2013, pp.1-8.
https://search.emarefa.net/detail/BIM-498636
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-498636