Document: NUREG-0800
Document ID: 123b0c6f-59c2-4a34-9ab3-623e0eb04db3
Document Type: srp
Title: B-9
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A226.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
8, “Standard Criteria for the Periodic Surveillance Testing of Nuclear Power Generating Station Safety Systems.” The extent of test and calibration capability provided bears heavily on whether the design meets the single-failure criterion. Any failure that is not detectable must be considered concurrently with any random postulated, detectable, single failure. Periodic testing should duplicate, as closely as practical, the overall performance required of the protection system. The test should confirm operability of both the automatic and manual circuitry. The capability should be provided to permit testing during power operation. When this capability can only be achieved by overlapping tests, the test scheme must be such that the tests do, in fact, overlap from one test segment to another. Test procedures that require disconnecting wires, installing jumpers, or other similar modifications of the installed equipment are not acceptable test procedures for use during power operation. The review of test and calibration provisions should be coordinated with the organization responsible for the review of technical specification format and content to confirm that the system design supports the types of testing required by the technical specifications. The system design should also support the compensatory actions required by technical specifications when limiting conditions for operation are not met. Typically, the design should allow for tripping or bypass of individual functions in each protection system channel.