Overview of NRC NUREG-1482, Revision 3, Guidelines for Inservice Testing at Nuclear Power Plants – Inservice Testing of Pumps and Valves, and Inservice Examination and Testing of Dynamic Restrains (Snubbers) at Nuclear Power Plants

Abstract

Abstract The U.S. Nuclear Regulatory Commission (NRC) staff issued Revision 3 to NUREG-1482, “Guidelines for Inservice Testing at Nuclear Power Plants,” to assist nuclear power plant licensees in establishing a basic understanding of the regulatory basis for pump and valve inservice testing (IST) programs and dynamic restraints (snubbers) inservice examination and testing programs. Since the issuance of Revision 2 to NUREG-1482, certain tests and measurements required by earlier editions and addenda of the American Society of Mechanical Engineers (ASME) Operation and Maintenance of Nuclear Power Plants, Division 1, OM Code: Section IST (OM Code) have been clarified, updated, or revised. The revision to NUREG-1482 and its Appendix A incorporates and addresses those changes, and includes the IST programs guidelines related to new reactors. This revision includes a new Appendix B related to guidance for treatment of pumps, valves, and dynamic restraints (snubbers) during implementation of 10 CFR 50.69, “Risk-Informed Categorization and Treatment of Structures, Systems, and Components for Nuclear Power Plants.” The revised guidance incorporates lessons learned and experience gained since the previous revision to NUREG-1482. This paper provides an overview of the contents of NUREG-1482 and those changes, and discusses how they affect NRC guidance on implementing pump and valve IST programs, and dynamic restraint (snubber) inservice examination, testing and service life monitoring programs. This paper highlights important changes to NUREG-1482, but is not intended to provide a complete record of all changes to the document. The NRC intends to continue to develop and improve its guidance on IST and inservice inspection (ISI) methods through active participation in the ASME OM Code consensus process; interactions with various technical organization and user groups; and periodic updates of NRC-published guidance and issuance of generic communications as the need arises.