Document: NUREG-0800
Document ID: 217aa53e-c4ac-4a8f-b1b6-968ad75d68ab
Document Type: srp
Title: INSERVICE TESTING OF PUMPS AND VALVES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070368.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.6
CFR Part: 
CFR Title: 

Content:
and techniques should be verified during preoperational testing. (b) Each POV should be tested under various differential pressure and flow conditions up to maximum achievable conditions. A sufficient number of tests should be performed to determine the force requirements at design-basis conditions. The force requirements to close the valve to the position at which there is diagnostic indication of full valve closure (if required to fulfill the safety function for the particular valve) should be determined. (c) Design force requirements should be determined for such parameters as differential pressure, fluid flow, undervoltage, power supply, temperature, seismic effects, dynamic effects, minimum hydraulic or pneumatic pressure, and appropriate combinations, as applicable. The design force requirements should be determined allowing sufficient margin to account for diagnostic equipment inaccuracies. (e) The total force that is required to be delivered by the POV under static and dynamic conditions, including allowances for diagnostic equipment inaccuracies, should be compared to the allowable structural capability limits for the individual parts of the POV. 3.9.6-9 DRAFT Rev. 3 - April 1996 (f) Remote position indication testing should be conducted, if appropriate, to verify that proper open or closed position of the POV is indicated in the control room. (3) In addition to the inservice testing described in subsection II.2.b, periodic inservice testing of POVs should be conducted to permit an assessment of continuing operability under design basis conditions. (a) Periodic testing should be conducted under conditions, if applicable and practical, that objectively demonstrate continuing POV capability to open and/or close under design-basis conditions, as established in subsection II.2.d(2). A risk-based approach may be used to prioritize valve test activities, such as frequency of individual valve tests and selection of valves to be tested. The valve test program