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- W295030239 abstract "The emergency core cooling systems (ECCS) at a reactor site have a dual power source for their assured operation if and when needed. The normal power source is the off-site ac power. In the unlikely event of loss of all off-site power, emergency diesel generators are the backup ac source. Thus, there is an incentive to assure that the reliability of diesel generators at operating plants is maintained at an acceptable level. Recently, NRC has outlined in SECY-83-472 a new approach for performing ECCS analysis and has given approval to General Electric to use this new approach in their SAFER/GESTR LOCA computer code. This report addresses the sensitivity of peak cladding temperature that is determined using the realistic LOCA analysis approach outlined in SECY-83-472 for various diesel generator start durations. A quantitative assessment was made to determine the impact on the peak cladding temperature. The results for a BWR/6 show that using licensing assumptions and the SAFER/GESTR code (based on the SECY-83-472 approach), peak cladding temperature (PCT) during a design-basis LOCA for the present 10-s diesel generator start criteria is approx. 1100/sup 0/F. This is far below the prescribed limit of 2200/sup 0/F. The results further show that in ordermore » to maintain the PCT below 1600/sup 0/F, which is the current NRC approved SAFER application PCT limit, the diesel generator start time can be as high as 70 s (compared to present specified 10 s).« less" @default.
- W295030239 created "2016-06-24" @default.
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- W295030239 date "1986-01-01" @default.
- W295030239 modified "2023-09-23" @default.
- W295030239 title "Effect of diesel start time on BWR/6 peak cladding temperature: licensing basis sensitivity calculations" @default.
- W295030239 hasPublicationYear "1986" @default.
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