Document: NUREG-0800
Document ID: f1629507-6318-4e71-94a6-9d6664ba96a3
Document Type: srp
Title: of the plant safety analysis report (SAR).  Although NRC did not endorse the annexes of
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070660327.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.6
CFR Part: 
CFR Title: 

Content:
March 2007 5.4 Equipment Qualification (IEEE Std 7-4.3.2-2003 Clause 5.4) In addition to the equipment qualification criteria provided by IEEE Std 603-1991 and Subsection 5.4 of SRP Appendix 7.1-C the following criteria are necessary to qualify digital computers for use in safety systems. 5.4.1 Computer System Testing (IEEE Std 7-4.3.2-2003 Sub-Clause 5.4.1) Computer system equipment qualification testing should be performed with the computer functioning with software and diagnostics that are representative of those used in actual operation. All portions of the computer necessary to accomplish safety functions, or those portions whose operation or failure could impair safety functions, should be exercised during testing. This includes, as appropriate, exercising and monitoring the memory, the central processing unit, inputs, outputs, display functions, diagnostics, associated components, communication paths, and interfaces. Testing should demonstrate that the performance criteria related to safety functions have been met. 5.4.2 Qualification of Existing Commercial Computers (IEEE Std 7-4.3.2-2003 Sub- Clause 5.4.2) EPRI TR-106439, as accepted by the NRC safety evaluation dated July 17, 1997, provides guidance for the evaluation of existing commercial computers and software to comply with the criteria of Sub-Clause 5.4.2 of IEEE Std 7-4.3.2-2003. The guidance of SRP BTP 7-14 may be applied to the evaluation of vendor processes described in EPRI TR-106439. EPRI TR-107330, “Generic Requirements Specification for Qualifying a Commercially Available PLC for Safety-Related Applications in Nuclear Power Plants, as accepted by the NRC safety evaluation dated July 30, 1998, provides more specific guidance for the evaluation of existing programmable logic controllers (PLC). The fundamental criteria for demonstrating reasonable assurance that the computer will perform its intended safety functions is presented in this portion of IEEE Std 7-4.3.2-2003 and additional guidance