Document: NUREG-0800
Document ID: c3be7591-d074-48a8-bb9c-4dcdfccd0ddf
Document Type: srp
Title: Draft Revision 6 – August 2015
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A959.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
tem, or auxiliary supporting features and other auxiliary features. IEEE Std 603-1991, Clause 5.8.3, gives the equivalent requirements for safety systems. RG 1.53, “Application of the Single-Failure Criterion to Safety Systems,” which endorses IEEE Std 379, “IEEE Standard Application of the Single-Failure Criterion to Nuclear Power Generating Station Safety Systems,” states that the protection system must be capable of accomplishing the required protective function in the presence of any single detectable failure concurrent with all identifiable, but non-detectable, failures. Consequently, self-testing and periodic testing are important elements in the design's ability to meet the single-failure criterion. RG 1.118, “Periodic Testing of Electric Power and Protection Systems,” states that the criteria of IEEE Std 338, “IEEE Standard Criteria for the Periodic Surveillance Testing of Nuclear Power Generating Station Safety Systems,” are considered acceptable methods for the periodic testing of protection systems (subject to the specific exceptions discussed in RG 1.118). IEEE Std 338 provides design and operational criteria for the performance of periodic and automatic testing; its criteria are supplementary to IEEE Std 603-1991. RG 1.152, “Criteria for Use of Computers in Safety Systems of Nuclear Power Plants,” endorses IEEE Std 7-4.3.2, “IEEE Standard Criteria for Digital Computers in Safety Systems of Nuclear Power Generating Stations,” systems. The RG and endorsed standard provide guidance applicable to the development of self-test software and to making safety functions independent from self-test functions. 3. Definitions Periodic tests are tests performed at scheduled intervals to detect failures and verify operability (IEEE Std 338). Periodic tests include surveillance tests. A self-test is a test or series of tests performed by a device upon itself. Self-tests include on- line continuous self-diagnostics, equipment-initiated