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KMID : 0371819950270020165
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Nuclear Engineering and Technology
1995 Volume.27 No. 2 p.165 ~ p.175
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RCS Overpressure Protection Analysis Using SEBIM POSRV
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Abstract
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The overpressure protection system for PWR should be designed with sufficient capacity to limit the pressure to less than 110% of the reactor coolant system design pressure during the most severe abnormal operational transient. In this study, the
feasibility of adopting the SEBIM POSRV instead of the current spring loaded pop-opening safety valves to the ABB-CE designed 2895 MWt PWR is investigated for its overpressure protection capability. The required SEBIM POSRV size as well as its
opening/closing setpoints are determined through a series of computer analyses using the LTC code which has been used for the overpressure protection analysis for Yonggwang units 3&4. The analysis results show that the overpressure protection
system
with monobloc SEBIM POSRV can maintain the RCS pressure below 110% of the design pressure demonstrating its overpressure protection capability for the ABB-CE designed 2825 MWt PWRs.
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