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A Reliability Assessment Methodology for the VHTR Passive Safety System

Title
A Reliability Assessment Methodology for the VHTR Passive Safety System
Author
제무성
Keywords
UNCERTAINTY
Issue Date
2014-10
Publisher
INFORUM VERLAGS-VERWALTUNGSGESELLSCHAFT MBH, ATW-ADVERTISING-SUBSCRIPTIONS, ROBERT-KOCH-PLATZ 4, BERLIN, 10115, GERMANY
Citation
ATW-INTERNATIONAL JOURNAL FOR NUCLEAR POWER , Vol.59 No.10 [2014] , 564-570
Abstract
The passive safety system of a VHTR (Very High Temperature Reactor), which has recently attracted worldwide attention, is currently being considered for the design of safety improvements for the next generation of nuclear power plants in Korea. The functionality of the passive system does not rely on an external source of an electrical support system, but on the intelligent use of natural phenomena. Its function involves an ultimate heat sink for a passive secondary auxiliary cooling system, especially during a station blackout such as the case of the Fukusima Daiichi reactor accidents. However, it is not easy to quantitatively evaluate the reliability of passive safety for the purpose of risk analysis, considering the existing active system failure since the classical reliability assessment method cannot be applied. Therefore, we present a new methodology to quantify the reliability based on reliability physics models. This evaluation framework is then applied to of the conceptually designed VHTR in Korea. The Response Surface Method (RSM) is also utilized for evaluating the uncertainty of the maximum temperature of nuclear fuel. The proposed method could contribute to evaluating accident sequence frequency and designing new innovative nuclear systems, such as the reactor cavity cooling system (RCCS) in VHTR to be designed and constructed in Korea.
URI
http://dcollection.hanyang.ac.kr/jsp/common/DcLoOrgPer.jsp?sItemId=000000063113https://repository.hanyang.ac.kr/handle/20.500.11754/70900
ISSN
1431-5254
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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