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:
lear Power Plants” (Ref. 19), describes a method that is acceptable to the NRC staff for use in complying with the regulatory requirements with respect to satisfying criteria for accident monitoring instrumentation in nuclear power plants. • RG 1.100, “Seismic Qualification of Electrical and Active Mechanical Equipment and Functional Qualification of Active Mechanical Equipment for Nuclear Power Plants” (Ref. 20), describes methods that the NRC staff considers acceptable for use in the seismic qualification of electrical and active mechanical equipment and the functional qualification of active mechanical equipment for nuclear power plants. • RG 1.183, “Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors” (Ref. 21), provides guidance to licensees of operating power reactors on acceptable applications of alternative source terms; the scope, nature, and documentation of associated analyses and evaluations; consideration of impacts on analyzed risk; and content of submittals related to the use of alternative source terms in radiological consequence analyses at operating power reactors. RG 1.183 can be used in radiological accident analysis and provides acceptable accident source term methodologies that may be used for EQ, as applicable. Therefore, for those applicants and licensees to which RG 1.183 is applicable, this guide references RG 1.183 to describe acceptable source term methodologies to be used for EQ. However, RG 1.183 is not the only approved methodology for accident source terms, and additional source term methodologies may be approved in the future. While this guide does not specifically reference other accident source term methodologies, approved accident source term methodologies for EQ may continue to be used (provided that they remain applicable) and the staff may consider new methodologies. The source term methodologies used should be applicable to the specific applicant or licensee and