Document: NRC Regulatory Guide
Document ID: 50995365-d97f-4101-970a-378af6b5374b
Document Type: regulatory_guide
Title: Qualification of Fiber-Optic Cables, Connections, and Optical Fiber Splices for Use in Safety Systems for Production and Utilization Facilities (Rev. 0)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2505/ML25052A253.pdf
Revision Date: 2025-08
Chapter: 
Section ID: RG-1.257
CFR Part: 
CFR Title: 

Content:
sufficient to provide reasonable assurance that the facility has been constructed and will be operated in accordance with the license; the Atomic Energy Act of 1954, as amended (Ref. 8); and NRC rules and regulations. RG 1.257, Rev. 0, Page 4 o 10 CFR 52.99(c)(1) requires that each combined license holder notify the NRC that the prescribed inspections, tests, and analyses have been performed and that the prescribed acceptance criteria are met for each ITAAC included in their combined license. o 10 CFR 52.137(a)(13) requires that an applicant for a standard design approval must provide the list of electric equipment that is important to safety, as mandated under 10 CFR 50.49(d). o 10 CFR 52.157(f)(6) requires that an applicant for a manufacturing license provide a list of electric equipment important to safety, as mandated under 10 CFR 50.49(d). Related Guidance • NUREG-0800, “Standard Review Plan for the Review of Safety Analysis Reports for Nuclear Power Plants,” Section 3.11, Revision 3, “Environmental Qualification of Mechanical and Electrical Equipment,” issued March 2007 (Ref. 9), identifies staff guidance for determining that all items of equipment that are important to safety (mechanical, electrical, and instrumentation and control equipment) are capable of performing their design safety functions under all normal environmental conditions, anticipated operational occurrences, and accident and post-accident environmental conditions. Environmental qualification, as discussed in NUREG-0800, includes all environmental conditions that may result from any normal mode of plant operation, anticipated operational occurrences, DBEs (as defined in 10 CFR 50.49(b)(1)(ii)), post-DBEs, and containment tests. • Before the 1983 issuance of the 10 CFR 50.49 final rule, the Commission (in CLI-80-21, “Petition for Emergency and Remedial Action,” dated May 23, 1980 (Ref. 10)) directed the staff to use NUREG-0588, “Interim Staff Position on Environmental