March 14th, 2011 – Seismic PRAs do not consider damage from earthquake aftershocks – Need to predict the fragility of the plant SSCs following the main shock

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From: Stutzke, Martin
Sent: Monday, March 14, 2011 9:51 AM
To: Coyne, Kevin
Subject: PRA Info on Tsunamis and Aftershocks

The Diablo Canyon PRA considered a tsunami leading to flooding of the ASW pumps. Nothing in the San Onofre PRA on tsunamis.

Seismic PRAs do not consider damage from earthquake aftershocks. To do so, you’d need to predict the fragility of the plant SSCs following the main shock.

Marty
Martin A. Stutzke
Senior Technical Advisor for PRA Technologies
Division of Risk Assessment
Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
(301) 251-7614

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