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seismic80
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10 CFR 50.46 gives the acceptance criteria as the required condition for the performance of
ECCS. There, it is indicated that PCT (Peak Clad Temperature) must be below 2200F.
On the other hand one can rarely find an accident analysis for NPPs with the result of the analysis showing the PCT exceeds 1800F.
For example
LB-LOCA analysis of AP-1000 -----> PCT=1800F
The same analysis for EPR -----> PCT= 1600F
I think this has a reason. Although different documents insist on the adequate safety margin from acceptance criteria but they don't give any quantified safety margin.
Is there any practical safety margin in nuclear industry? How much is this adequate margin?
Thanks
ECCS. There, it is indicated that PCT (Peak Clad Temperature) must be below 2200F.
On the other hand one can rarely find an accident analysis for NPPs with the result of the analysis showing the PCT exceeds 1800F.
For example
LB-LOCA analysis of AP-1000 -----> PCT=1800F
The same analysis for EPR -----> PCT= 1600F
I think this has a reason. Although different documents insist on the adequate safety margin from acceptance criteria but they don't give any quantified safety margin.
Is there any practical safety margin in nuclear industry? How much is this adequate margin?
Thanks