Document: NUREG-0800
Document ID: 4926757d-c89a-498c-a8cb-918908ab5496
Document Type: srp
Title: of the SAR should provide this information.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350467.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
lated events compared with.the credit taken for the parameter in the events for which it provides protection. 10. Section 4.9, Capability for Sensor Checks - The most common method used to. verify the availability of the input sensors is by cross checking between redundant channels that have readout available. When only two channels of readout are provided; the applicant should state the basis used to ensure that in operator will not take incorrect action when the two channel read- outs differ. The applicant should state the method to be used for checking the operational availability of nonindicating sensors. 11. Section 4.10, Capability for Test and Calibration - Guidance on periodic testing of the protection system is provided in RG 1.22 and in IEEE Std 338 as supplemented by RG 1.118. .The extent of test and calibration capa- bility 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. Periodic tests conducted during power operation should use only permanently installed test equipment. 12. Section 4.11, Channel Bypass and Removal from Operations - In'general, it is an operational rather than a safety problem if testing causes the initiation of a protective action. 13. Section 4.12, Operating