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:
ection II.2.c(1) and (2) should include the following: (a) As required by the safety function, the valve must fully open and/or the valve must fully close. Diagnostic equipment must indicate hard seat contact. (b) The testing must demonstrate adequate margin to achieve design requirements, including consideration of diagnostic equipment inaccuracies, degraded voltage, control switch repeatability, load- sensitive MOV behavior, and margin for degradation. (c) The maximum torque and/or thrust (as applicable) achieved by the MOV, allowing sufficient margin for diagnostic equipment inaccuracies and control switch repeatability, must not exceed the DRAFT Rev. 3 - April 1996 3.9.6-8 allowable structural and undervoltage motor capability limits for the individual parts of the MOV. (d) Remote position indication testing must provide verification of the proper disk position at the remote location.66 d. Inservice Testing of Power-Operated Valves (POVs) Other Than MOVs (1) POVs include those valves equipped with pneumatic, hydraulic, piston, and solenoid actuators. (2) In addition to the inservice testing described in subsection II.2.b, preoperational tests should be conducted on each POV in the open and closed directions under static and maximum achievable conditions up to design-basis conditions. (a) The use of diagnostic equipment and techniques that measure or provide information to determine total friction, stroke time, seat load, spring rate, travel under normal pneumatic or hydraulic pressure (if applicable), and minimum pneumatic or hydraulic pressure (if applicable) is acceptable 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) Each POV should be tested under various differential pressure and flow conditions up to maximum achievable conditions. A sufficient