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:
t. 3.9.6-11 Revision 3 - March 2007 (b) The testing should demonstrate adequate margin with respect to the design basis, 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, should not exceed the allowable structural and undervoltage motor capability limits for the individual parts of the MOV. ii. Inservice Testing Program for Power-Operated Valves Other Than Motor- Operated Valves (1) Safety-related POVs should be qualified to perform their design- basis functions either before installation or as part of preservice tests. (2) NRC Regulatory Issue Summary 2000-03 provides guidance for the development of IST programs for POVs that incorporate the lessons learned from MOV analysis and tests in response to GL 89-10 . (3) Class 1E SOVs are to be verified to function as designed. Each SOV should be verified, to the extent practical, to be capable of performing its safety functions for the electrical power supply amperage and voltage at design basis extremes. iii. Inservice Testing Program for Check Valves (1) Preservice tests should be conducted on each check valve. Each check valve should be tested in the open and closed direction, consistent with the safety function and under normal operating system conditions. Piping system design features should be able to accommodate all applicable check valve testing equipment and procedures. (a) Diagnostic equipment or nonintrusive techniques that monitor internal component conditions 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 testing and later during IST. The equipment and its operating