Document: NUREG-0800
Document ID: 899b3059-69f1-4f7b-bead-1d58e5f4870f
Document Type: srp
Title: Revision 5 - March 2007
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550080.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
y between individual units. The qualification testing should validate the results of the analysis at the extremes of fault conditions. 2. Information to be Reviewed Information to be reviewed includes the applicant/licensee’s description of the (1) device application, (2) device design, (3) test method, and (4) test results. 3. Acceptance Criteria General acceptance guidelines for application and qualification are provided in IEEE Std 603-1991, or IEEE Std 279-1971, and Regulatory Guide 1.75. Acceptance criteria for the descriptions of the device application, device design, test methods, and test results are as follows: Description of Device Application Isolation devices should be classified as part of the safety system and powered in accordance with criteria of IEEE Std 603-1991 or IEEE Std 279-1971 and the guidelines of Regulatory Guide 1.75. If non-safety power sources interface to the isolation device, the applicant/licensee should verify that the non-safety power is not required for the device to perform its isolation function. MCF requirements should be established by analysis of proximate circuits that are credible sources of the fault, either through inadvertent application from human error or through a fault or failure postulated to occur that involves proximate circuits, cabling, or terminations (e.g., a “hot short” from an adjacent conductor). The determination of specific MCF characteristics is plant-specific. Surge waveforms and characteristics should be defined for the worst-case conditions expected at the installation. The acceptable leakage current into the safety system should be identified for specified MCFs. Description of Device Design The design of isolation devices should conform to IEEE Std 603-1991, or IEEE Std 279-1971, and Regulatory Guide 1.75 guidelines for (1) independence of redundant safety divisions, and (2) independence between protection (safety) and control (non-safety) systems. The isolation device should include design