Document: NRC Regulatory Guide
Document ID: 30181e34-3bc1-46b8-8de9-ef073c34bc13
Document Type: regulatory_guide
Title: Bypassed and Inoperable Status Indication for Nuclear Power Plant Safety Systems + HISTORY - HISTORY 10/2008 – DG-1205 , Proposed Revision 1 (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0821/ML082140114.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.47
CFR Part: 
CFR Title: 

Content:
en (301) 415-0701 DRAFT REGULATORY GUIDE DG-1205 (Proposed Revision 1 of Regulatory Guide 1.47, Rev. 0, dated May 1973) BYPASSED AND INOPERABLE STATUS INDICATION FOR NUCLEAR POWER PLANT SAFETY SYSTEMS A. INTRODUCTION This guide describes a method that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable for use in complying with the NRC’s regulations with respect to bypassed and inoperable status indication for nuclear power plant safety systems. The regulatory framework that the NRC has established for nuclear power plants consists of a number of regulations and supporting guidelines applicable to bypassed and inoperable status indication, including, but not limited to, General Design Criterion (GDC) 1, “Quality Standards and Records,” GDC 13, “Instrumentation and Control,” GDC 19, “Control Room,” GDC 21, “Protection System Reliability and Testability,” GDC 22, “Protection System Independence,” and GDC 24, “Separation of Protection and Control Systems,” as set forth in Appendix A, “General Design Criteria for Nuclear Power Plants,” to Title 10, Part 50, “Domestic Licensing of Production and Utilization Facilities,” of the Code of Federal Regulations (10 CFR Part 50) (Ref. 1). GDC 1 requires that structures, systems, and components important to safety be designed and installed to quality standards commensurate with the importance-to- safety of the functions to be performed. GDC 13 requires that appropriate controls be provided to maintain variables and systems that can affect the fission process, the integrity of the reactor core, the reactor coolant pressure boundary, and the containment and its associated systems within prescribed operating ranges. GDC 19 requires that a control room be provided from which actions can be taken to operate the nuclear power unit safely under normal operating conditions. GDC 21 requires that the protection system DG-1205, Page 2 be designed for high functional reliability