Energia i regulacje · 31.01.2018

An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis

The U.S. Nuclear Regulatory Commission (NRC) is issuing Revision 3 to Regulatory Guide (RG) 1.174, "An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant- Specific Changes to the Licensing Basis." This proposed guide, Revision 3, has been revised to incorporate additional information related to the evaluation of defense-in-depth since Revision 2 of RG 1.174 was issued in 2011. The proposed revision includes additional guidance on defense-in-depth to assure the defense-in-depth philosophy is interpreted and implemented consistently.