Document: NUREG-0800
Document ID: 21b37b7c-b45c-4247-b4a5-c2f28df75be4
Document Type: srp
Title: INSTRUMENTATION AND CONTROLS (Tier 1)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070663.pdf
Revision Date: 2023-06
Chapter: 14
Section ID: 14.3.5
CFR Part: 
CFR Title: 

Content:
ent use of the standard ITAAC in Tier 1 for electrical isolation and physical separation (independence) as it pertains to I&C issues. Guidance regarding its use should be provided to other branches as appropriate. II. ACCEPTANCE CRITERIA The acceptance criteria for ITAAC are based on meeting 10 CFR 52.97(b)(1), which sets forth the comprehensive requirements for ITAAC. For design certification reviews, the scope of ITAAC is limited to the scope of the certified design as required by 10 CFR 52.47(b). 1. For I&C systems, acceptability is based on meeting the relevant requirements of the following regulations: 10 CFR 50.55a(h), "Criteria for Protection Systems for Nuclear Generating Stations," and IEEE Standard 279-1971, as it pertains to safety-related protection systems requirements. GDC 1, as it pertains to quality standards and records requirements GDC 2, as it pertains to protection against natural phenomenon GDC 4, as it pertains to environmental and dynamic effects GDC 13, as it pertains to instrumentation and control requirements GDC 19, as it pertains to control room requirements GDC 20, as it pertains to protection system design requirements GDC 21, as it pertains to protection system reliability and testability requirements GDC 22, as it pertains to protection system independence requirements GDC 23, as it pertains to protection system failure modes requirements GDC 24, as it pertains to separation of protection systems from control systems 14.3.5-3 DRAFT Rev. 0 - April 1996 GDC 25, as it pertains to protection system requirements for reactivity control malfunctions GDC 29, as it pertains to protection against anticipated operational occurrences requirements To meet the above regulations, the appropriate Tier 1 and ITAAC entries should address the following design issues: (1) General functional requirements for the system (2) Hardware and software architecture (3) Single failure criterion (4) Quality of components and modules (hardware, software, and