Document: NUREG-0800
Document ID: f0ec8180-bdec-47b1-b10f-926bce888716
Document Type: srp
Title: FUNCTIONAL DESIGN, QUALIFICATION, AND INSERVICE TESTING PROGRAMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16134A116.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.6
CFR Part: 
CFR Title: 

Content:
off the seat under normal and other minimum expected differential pressure conditions. (4) In 10 CFR 50.55a(b)(3)(iv), the regulations specify conditions for the voluntary application of Appendix II, “Check Valve Condition Monitoring Program,” to the OM Code. Those requirements must be satisfied when applying Appendix II to the OM Code. iv. Pressure Isolation Valve Leak Testing (1) Pressure isolation valves (PIVs) are the two normally closed valves, in series, within the RCPB (defined in 10 CFR Part 50) that isolate the reactor coolant system from an attached low-pressure system. PIVs are classified as A or A/C in accordance with the provisions of Subsection ISTC-1300 of the OM Code. (2) PIV seat leakage rate tests should be conducted on each individual PIV in accordance with Subsection ISTC-3630 of the OM Code. The FSAR should specify the allowable leak rates and 3.9.6-24 Revision 4 – March 2017 test intervals for each PIV. If leakage rates are not specified, the maximum allowable leak rate for each PIV at full reactor pressure should be less than 1.9 liters per minute (L/m) (0.5 gallons per minute (gpm)) per nominal inch of valve size, and not to exceed 19 L/m (5 gpm). The test interval should be 18 months or every refueling outage, whichever is longer. v. Containment Isolation Valve Leak Testing (1) The NRC regulations require that containment isolation valves (CIVs) be leak tested in accordance with Appendix J, “Primary Reactor Containment Leakage Testing for Water-Cooled Power Reactors,” to 10 CFR Part 50. (2) The applicant’s FSAR should provide a list of CIVs that includes the allowable leak rate for each valve or valve combination. vi. Inservice Testing Program for Safety and Relief Valves (1) Safety and relief valves, including thermal relief valves and vacuum relief valves, are pressure relief devices that protect systems (or portion of systems) that perform a function in shutting down the reactor to the safe-shutdown condition, maintaining the