Document: NUREG-0800
Document ID: 02fef38f-79ed-4d55-825f-81551bcfdcdc
Document Type: srp
Title: LOSS-OF-COOLANT ACCIDENTS RESULTING FROM SPECTRUM OF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550016.pdf
Revision Date: 2023-06
Chapter: 15
Section ID: 15.6.5
CFR Part: 
CFR Title: 

Content:
f assurance that the plant will pose no undue risk to the public as a result of the consequences of LOCAs. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. The procedures below are used during the construction permit (CP), standard design certification, combined operating license (COL), and operating license (OL) reviews, as appropriate. During the CP or the standard design certification review, the values of system parameters setpoints used in the analysis are considered preliminary in nature and subject to change. At the OL or COL review, final values should be used in the analysis and the reviewer compares these to the limiting safety system settings included in the proposed technical specifications. For the review of the ECCS performance analysis, as presented in the applicant's SAR, the reviewer verifies the following: 1. The calculations were performed using an evaluation model as specified in 10 CFR 50.46 following the guidance of Appendix K, Section I, or Regulatory Guide 1.157. The application should clearly state this and properly reference the evaluation model. If the analysis is done with a new evaluation model, a generic review of the new model is required. Evaluation models pertain to both the short term behavior following both large and small break LOCAs as well as post-LOCA long term cooling evaluations that properly address boric acid precipitation and prevention for both large and small break LOCAs. 15.6.5-9 Revision 3 - March 2007 2. An adequate failure mode analysis has been performed to justify the selection of the most limiting single active