Document: NUREG-0800
Document ID: 80fe9eee-2d6e-4a7e-b7dd-ec23aab2d39f
Document Type: srp
Title: STRATEGIES AND GUIDANCE TO ADDRESS LOSS OF LARGE AREAS OF
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1211/ML121110138.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19.4
CFR Part: 
CFR Title: 

Content:
C inspections at licensed power reactor facilities revealed the level of detail and guidance provided in procedures varied considerably between facilities. Some licensees had established high quality, comprehensive procedures with clear guidance for responding to LOLA events. However, at many sites, the guidance was incomplete, erroneous, or inadequate, which called into question the quality of the validation of these procedures or whether verification and validation were performed. 19.4-20 Revision 0 – May 2013 Staff Position Implementation guidelines for strategies and the level of training on those guidelines will be considered adequate by the NRC if licensee staff members are able to walk through the strategies successfully using those guidelines. 6. During inspections at licensed power reactor facilities, the NRC staff found that some licensees had not established a maintenance program for equipment relied upon to implement strategies. A few licensees did not even test portable pumps required for some strategies. On the other hand, some licensees have established comprehensive maintenance programs which include: monthly surveillance checks, quarterly start and run checks, and annual pump flow tests. The NRC staff has found these programs acceptable. Staff Position Equipment relied upon to implement the strategies required by 10 CFR 50.54(hh)(2) should be maintained and periodically tested to ensure it will operate when called upon. Installed plant equipment with established maintenance and testing requirements may not need additional maintenance and testing. However, if these systems are modified to accommodate the strategies (e.g., adding fire hose connections) then licensees should confirm that existing maintenance and testing are adequate. Any new fire pumps, hoses, or nozzles purchased for these strategies should be maintained by licensees. An adequate program for equipment requiring maintenance will include: periodic surveillance checks, start and run