An On-Line Pressurizer Surveillance System Design to Prevent Small-Break Loss-of-Coolant Accidents Through Power-Operated Relief Valves Using a Microcomputer
作者:
Ho LeeJong,
Heung ChangSoon,
期刊:
Nuclear Technology
(Taylor Available online 1987)
卷期:
Volume 76,
issue 1
页码: 27-40
ISSN:0029-5450
年代: 1987
DOI:10.13182/NT87-A33894
出版商: Taylor&Francis
数据来源: Taylor
摘要:
A small-break loss-of-coolant accident (LOCA) caused by a stuck-open power-operated relief valve is one of the important contributors to nuclear power plant risk. A pressurizer surveillance system was designed to use a microcomputer to prevent the malfunction of the system; the effect of this improvement has been assessed through probabilistic risk assessment. The microcomputer diagnoses the malfunction of the system by a process-checking method and automatically performs the backup action related to each malfunction. This improvement means that we can correctly diagnose“spurious opening,”“failure to reclose,”and“small-break LOCA,”which are difficult for operators to diagnose quickly and correctly, and by taking automatic backup action we can reduce the probability of human error.
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