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:
e hard seat contact. (b) The POV testing must demonstrate adequate margin to achieve design requirements, including consideration of diagnostic equipment inaccuracies, margin for degradation, degraded voltage if applicable, and minimum hydraulic or pneumatic pressure if applicable. (c) The maximum torque and/or thrust achieved by the POV, allowing sufficient margin for diagnostic equipment inaccuracies and control switch repeatability, must not exceed the allowable structural capability limits for the individual parts of the POV. (d) Remote position indication testing must provide verification of the proper disk position at the remote location. (e) Class 1E electrical requirements are to be verified for solenoid- operated valves (SOVs). Each SOV should be verified, to the extent practical, to be capable of performing its safety functions for the appropriate electrical power supply amperage and voltage.68 e. Inservice Testing of Check Valves (1) In addition to the inservice testing described in subsection II.2.b, preoperational tests should be conducted on each check valve. Each check valve should be tested in the open and/or closed direction, as required by the safety function, under normal operating system conditions. (a) Diagnostic equipment or nonintrusive techniques that monitor internal component condition or measure such parameters as fluid flow, disk position, disk movement, disk impact forces, leak tightness, leak rates, degradation, and disk stability, should be used, if practical, for preoperational and inservice testing. The equipment and its operating principles should be described and the techniques justified. The operation and accuracy of the diagnostic equipment and techniques should be verified during preoperational testing. (b) To the extent practical, testing should be performed under temperature and flow conditions which would exist during normal operation as well as cold shutdown. Testing at temperature and flow conditions that may exist in other