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:
Section XI of the Codeparagraph 1.4 of OM 10. Each specific valve to be tested by the 60 rules of Subsection IWVOM 10 is to be listed in the SAR by type, valve 61 62 identification number, code class, and IWV-2000 valve category. 63 b. The valve test requirements, procedures, acceptance criteria, and corrective actions are acceptable if the provisions of IWV-3000 of Section XI of the CodeSections 3, 4, and 5 of OM 10 are met with regard to preservice and 64 periodic inservice valve testing. c. Inservice Testing of Motor Operated Valves (MOVs) (1) In addition to the inservice testing described in subsection II.2.b, preoperational tests should be conducted on each MOV 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 torque, thrust, and motor parameters, and that will permit an assessment of the performance and condition of the MOV and its components under actual and projected loading, 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 adequate during preoperational testing. DRAFT Rev. 3 - April 1996 3.9.6-6 (b) Each MOV 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 torque and thrust requirements at design-basis conditions. The torque and thrust requirements to close the valve to the position at which there is diagnostic indication of hard seat contact should be determined. (c) Design torque and thrust requirements should be determined considering such parameters as differential pressure, fluid flow, undervoltage, temperature, seismic effects, dynamic effects, and appropriate combinations. The design torque and thrust requirements