Document: NUREG-0800
Document ID: ecf7a8d4-0097-4a93-8609-630545f03f70
Document Type: srp
Title: REGULATORY TREATMENT OF NONSAFETY SYSTEMS FOR PASSIVE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1308/ML13081A756.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.3
CFR Part: 
CFR Title: 

Content:
roved by the NRC and is therefore acceptable. 2. Based on its review, the staff concludes that the applicant has correctly identified the nonsafety equipment relied upon to meet the SBO and ATWS rules and therefore requiring regulatory treatment. 3. The staff finds that the applicant has included sufficient nonsafety-related equipment in the RTNSS program to ensure that safety functions relied upon in the post-72-hour period and following seismic events have a reasonable likelihood of being successful. Further, the staff finds that the nonsafety-related equipment relied upon in the post-72-hour period has been designed in accordance with Commission policy and that the applicant has established appropriate ACs for this equipment. 4. The staff has reviewed the mission statements for SSCs including R/A missions. These statements correctly describe the missions of RTNSS and nonsafety-related SSCs and R/A missions are consistent with assumptions in the PRA; therefore, the staff finds them acceptable. 5. The applicant proposed a means for implementing RTNSS controls in the form of administrative ACs for the SSCs as discussed in the SER Section. The ACM, which has been incorporated into FSAR, documents the ACs. 6. The staff has reviewed the applicant’s implementation of the RTNSS process using the guidance in SRP 19.3 and determined that it satisfies the scope, criteria, and process described in SECY-94-084 and associated SRM, SECY-95-132 and associated SRM, and RG 1.206. Therefore, the staff finds the applicant’s implementation to be acceptable. The staff should support findings of acceptability with logical bases built from an evaluation of the considerations given in Subsection III of this SRP. Reviewers should verify that the applicant provided sufficient information to complete the review in accordance with this SRP and therefore that the review is sufficiently complete to support its general findings as identified above, which should be included in the staff’s