Document: NUREG-0800
Document ID: f0ec8180-bdec-47b1-b10f-926bce888716
Document Type: srp
Title: FUNCTIONAL DESIGN, QUALIFICATION, AND INSERVICE TESTING PROGRAMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16134A116.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.6
CFR Part: 
CFR Title: 

Content:
nditions do not require more frequent testing. (3) The valve should exhibit the full range of obturator position set forth in the design bases. viii. Inservice Testing Program for Explosively Actuated Valves (1) In some editions and addenda of the ASME OM Code prior to the 2012 Edition, Subsection ISTC-5260, “Explosively Actuated Valves,” in the ASME OM Code specifies that at least 20 percent of the charges in explosively actuated (i.e., squib) valves shall be fired and replaced at least once every 2 years. If a charge fails to fire, the ASME OM Code states that all charges with the same batch number shall be removed, discarded, and replaced with charges from a different batch. When incorporated by reference in 10 CFR 50.55a, the 2012 Edition of the ASME OM Code will specify additional requirements for squib valves in post-2000 nuclear power plants, which are defined by ASME as plants receiving their construction permit or COL license on or after January 1, 2000. (2) The applicant’s FSAR should specify that industry and regulatory guidance will be considered in the development of the IST program for squib valves. The applicant’s FSAR also should state that the IST program for squib valves will incorporate lessons learned from the design and qualification process for these valves, such that surveillance activities provide reasonable assurance of the operational readiness of squib valves to perform their safety functions. (3) Where the applicant has not specified in its FSAR the application of the 2012 Edition of the ASME OM Code, when incorporated by reference in 10 CFR 50.55a, a license condition should be included for preservice and inservice surveillance activities consistent with the license conditions for squib valves in the COLs for the Vogtle Units 3 and 4 and V.C. Summer Units 2 and 3 nuclear power plants. For example, an acceptable squib valve license condition would be as follows: Implement a surveillance program for explosively actuated valves