Document: NUREG-0800
Document ID: 591967ba-e3de-4621-8628-375311695d02
Document Type: srp
Title: REACTOR COOLANT PRESSURE BOUNDARY LEAKAGE DETECTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070422.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.2.5
CFR Part: 
CFR Title: 

Content:
llowing type, to be included in the staff's safety evaluation report: The reactor coolant pressure boundary (RCPB) leakage detection system provides reliable monitoring of reactor coolant leakage from components of the reactor coolant pressure boundary by the use of combinations of atmospheric particulate monitors, radiogas monitors, level indicators and pressure, humidity and temperature indicators. The leakage detection systems provided to detect leakage from components of the reactor coolant pressure boundary furnish reasonable assurance that structural degradation, which may develop in pressure-retaining components of the RCPB and result in coolant leakage during service, will be detected on a timely basis, so that corrective actions can be made before such degradation could become sufficiently severe to jeopardize the safety of the system, or before the leakage could increase to a level beyond the capability of the makeup system to replenish the coolant loss. The staff concludes that the design of the RCPB leakage detection systems is acceptable and meets the requirements of General Design Criterion 2 with respect to the capability to maintain and perform their safety functions in the event of earthquakes, and General Design Criterion 30 DRAFT Rev. 2 - April 1996 5.2.5-6 with respect to the detection, identification and monitoring of the source of reactor coolant leakage. This conclusion is based on the following: 1. The applicant has met the requirements of General Design Criterion 2 with respect to the systems capability to maintain and perform their safety functions in the event of earthquakes by meeting regulatory positions C-1 and C-2 of Regulatory Guide 1.29, and 2. The applicant has met the requirements of General Design Criterion 30 with respect to the detection, identification, and monitoring of the source of reactor coolant leakage by meeting regulatory positions C-1 through C-9 of Regulatory Guide 1.45. For design certification reviews, the findings