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:
f 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 safe-shutdown condition, or mitigating the consequences of an accident. (2) Safety and relief valve tests should be conducted in accordance with Appendix I to the OM Code. (3) Stroke tests should be performed for dual-function safety and relief valves (e.g., boiling-water reactor main steam automatic depressurization system safety/relief valves). 3.9.6-14 Revision 3 - March 2007 (4) Power-operated relief valves should be tested in accordance with Subsection ISTC-5100 for Category B valves and Subsection ISTC-5240 for Category C valves. (5) The test equipment, including gages, transducers, load cells, and calibration standards, used to determine valve set-pressure is acceptable if the overall combined accuracy does not exceed ±1 percent of the indicated (measured) set pressure. (6) The plant SAR should provide a list of safety and relief valves that includes the set pressure and allowable tolerances for each valve. vii. Inservice Testing Program for Manually Operated Valves (1) The plant SAR should provide a list of manually operated valves, including their safety-related function. (2) In 10 CFR 50.55a(b)(3)(vi), the regulations take exception to the 5-year exercise interval for manually operated valves allowed in the OM Code. In accordance with the regulations, manual valves must be exercised on at least a 2-year interval. (3) The valve should exhibit the full range of obturator position set forth in the design bases. viii. Inservice Testing Program for Explosively Actuated Valves (1) At least 20 percent of the charges in explosively actuated valves should be fired and replaced at least every 2 years. (2) If a charge fails to fire, all charges with the same batch number should be removed and replaced with charges from a