Document: NUREG-0800
Document ID: a8853b5a-7119-4e4d-8880-496c64ff5b6c
Document Type: srp
Title: INSTRUMENTATION AND CONTROLS - INTRODUCTION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1602/ML16020A050.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
ioners to inform them about policy matters. Staff Requirements Memoranda (SRM) provide the NRC’s decisions and directions on the issues discussed in the SECY. • RGs describe acceptable methods for meeting regulatory requirements and provide guidance to applicant or licensees. Industry codes and standards set forth industry consensus requirements and recommended practices applicable to I&C systems for nuclear power plants. These standards are endorsed by RGs, with or without modification, and provide acceptable methods for meeting the requirements of the NRC’s regulations. • Branch technical positions (BTP) document the resolution of significant technical issues or questions of interpretation that have arisen in past reviews. BTPs outline acceptable approaches to a particular issue. The approaches taken in BTPs, like the recommendations of RGs, are not mandatory. SECY and associated SRM, RGs and their endorsed industry codes and standards, and BTPs are the guidelines used as SRP acceptance criteria for the evaluation of conformance to the requirements of the NRC’s regulations. 2. Use of IEEE Std 603-1991 and IEEE Std 279-1971 for Nonsafety Systems. IEEE Std 603-1991 is an NRC requirement for safety systems and IEEE Std 279-1971 is an NRC requirement only for protection systems. However, these standards require that protection and safety systems be appropriately isolated from nonsafety systems. Consequently, the requirements of IEEE Std 603-1991 and IEEE Std 279-1971 apply to the interface between safety and nonsafety systems. The quality and reliability of systems important to safety that are not classified as safety systems should still be sufficient to minimize challenges to safety systems and to fulfill their overall role in plant nonsafety strategy. Although IEEE Std 603-1991 and IEEE Std 279-1971 are not requirements for nonsafety I&C systems, these standards describe concepts that are useful in any situation in which functional reliability is a goal.