Document: NUREG-0800
Document ID: 00471f3b-36d9-4ce3-af70-d4dac9bb0e67
Document Type: srp
Title: Draft Revision 6 – August 2015
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A809.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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Content:
are based on experience in the detailed reviews of applicant or licensee submittals describing the application of in-situ cross-calibration procedures for reactor coolant RTDs, as well as U.S. Nuclear Regulatory Commission (NRC) research activities. In addition, the staff has completed reviews of applicant or licensee submittals and found that they met the requirements of the regulations identified. Other methods, such as using a diverse parameter to provide a cross-correlation reference, can be used if adequate justification is provided. 1. Regulatory Basis Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(h), “Protection and Safety Systems,” requires compliance with the Institute of Electrical and Electronics Engineers (IEEE) Standard (Std) IEEE Std 603-1991, “IEEE Standard Criteria for Safety Systems for Nuclear Power Generating Stations,” and the correction sheet dated January 30, 1995. For nuclear power plants with construction permits issued before January 1, 1971, the applicant or licensee may elect to comply instead with the plant-specific licensing basis. For nuclear power plants with construction permits issued between January 1, 1971, and May 13, 1999, the applicant or licensee may elect to comply instead with the requirements stated in IEEE Std 279-1971, “Criteria for Protection Systems for Nuclear Power Generating Stations.” 10 CFR 50.55a(h) requires in part that safety systems satisfy the requirements of IEEE Std 603-1991, including Clause 5.7 as part of the safety system criteria, Clause 6.5 for functional design requirements, and Clause 6.8 for allowances and uncertainties. 10 CFR 50.55a(h) also requires in part that protection systems satisfy the criteria of IEEE Std 279-1971, including Clause 3(9) regarding the bases for minimum performance requirements including response times and accuracies, Clause 4.9 for the capability for sensor checks, and Clause 4.10 for the capability for test and calibration. 10 CFR Part 50,