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:
ctrical faults and failures should be included in the test program. A specific definition of pass/fail acceptance criteria for each type of device should be provided. This should include justification that the pass/fail acceptance criterion is sufficient to demonstrate that the tested device meets the requirements of IEEE Std 603-1991, Clause 5.6, or IEEE Std 279-1971, Clause 4.7.2. Regulatory Guide 1.75 recommends that: • The maximum credible voltage or current transient applied to the device output should not degrade below an acceptable level the operation of the circuit connected to the device input. • Shorts, grounds, or open circuits occurring in the output will not degrade below an acceptable level the circuit connected to the device input. • Transient voltages that may appear in the output circuit (e.g., surges) should also be considered. • The qualification should consider the levels and duration of the fault current on the non-safety side of the device. For safety/non-safety isolation, during and following the application of the MCF or surge test, there should be no degradation or distortion of the isolation device input that would have a detrimental effect on the performance of the safety system. For isolation of redundant safety circuits, there should be no degradation or distortion of the redundant channel that would have a detrimental effect on the performance of the safety system. BTP 7-11-7 Revision 5 - March 2007 Applicable industry standards should be used as the basis for performing the qualification testing (e.g., IEEE Std C62.45-2002). Devices might be used either for isolation of safety circuits from non-safety circuits or for isolation of redundant safety divisions. For qualification testing, the detailed device configuration depends on the objective of the isolation and the specific type and configuration of the isolation device (e.g., relay, isolation amplifier, optical-electronic device). The MCF represents the application of the