Document: NUREG-0800
Document ID: c1650863-1de1-414d-af2a-3303c5a3d208
Document Type: srp
Title: FUNCTIONAL DESIGN, QUALIFICATION, AND INSERVICE TESTING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070720041.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.6
CFR Part: 
CFR Title: 

Content:
ting fluid flow conditions. (e) For passive plant designs, testing should verify that the valve disk moves freely off the seat under normal and other minimum expected differential pressure conditions. 3.9.6-13 Revision 3 - March 2007 (4) In 10 CFR 50.55a(b)(3)(iv), the regulations specify conditions for the application of Appendix II 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 AC 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 plant technical specifications or SAR should specify the allowable leak rates and test intervals for each PIV. 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. (3) The applicant’s SAR should provide a list of PIVs that includes the allowable leak rate for each valve. v. Containment Isolation Valve Leak Testing (1) Containment isolation valves (CIVs) should be leak tested in accordance with Appendix J to 10 CFR Part 50. (2) The plant SAR 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