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:
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) The NRC regulations in 10 CFR 50.55a require safety and relief valve tests to be conducted in accordance with Appendix I, “Inservice Testing of Pressure Relief Devices in Light-Water Reactor Nuclear Power Plants,” 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). (4) The NRC regulations in 10 CFR 50.55a require power- operated relief valves to 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 applicant’s FSAR 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 3.9.6-25 Revision 4 – March 2017 (1) The applicant’s FSAR 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 specific editions and addenda of the OM Code. In accordance with the regulations, manual valves must be exercised on a 2-year interval, provided that adverse conditions do not require more frequent testing. (3) The valve should exhibit the full range of obturator position set forth in the design bases. viii. Inservice Testing Program for Explosively Actuated