Document: NUREG-0800
Document ID: f4b8f0c1-9a14-46be-88c9-a6cb74d64dff
Document Type: srp
Title: Rev. 4 — June 1997
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500499.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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CFR Title: 

Content:
ilure 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. For digital computer-based systems, test provisions should address the increased potential for subtle system failures such as data errors and computer deadlock. BTP HICB-17 describes additional considerations in the evaluation of test provisions in digital computer-based systems. The review of test and calibration provisions should be coordinated with the Technical Specifications Branch (TSB) 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 safety system channel. BTP HICB-17 discusses considerations in performing this evaluation for digital computer-based systems. Rev. 4 — June 1997 SRP 7.1-C-10 13. Section 5.8 — Information Displays The review of information displays should be coordinated with the SRXB to confirm that the information displayed and the characteristics of the displays (e.g., location, range, type, and resolution) support operator awareness of system and plant status and will allow plant operators to make appropriate