Document: NUREG-0800
Document ID: 43123a17-321c-4751-b3ba-9ba5e9b0b364
Document Type: srp
Title: Draft Revision 6 – August 2015
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1515/ML15159A726.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
CFR Part: 
CFR Title: 

Content:
nt Important to Safety for Nuclear Power Plants,” or the applicant or licensee should provide an acceptable alternative for complying with 10 CFR 50.49(b)(3). For plants using Revision 4 of RG 1.97, accident monitoring equipment identified as Type A, B, or C in accordance with that guide should be environmentally qualified as required by 10 CFR 50.49. Type D variables should be environmentally qualified for the particular accident‘s postulated environment at the installed location in accordance with the plant’s licensing basis. Licensees converting to Revision 4 or performing modifications based on Revision 4 may reference previously accepted alternatives as their basis for deviations from the environmental qualification criteria in Revision 4. Seismic Qualification For plants using Revisions 2, 3, or 4 of RG 1.97, if a reactor’s licensing basis does not include a commitment to RG 1.100, “Seismic Qualification of Electric Equipment for Nuclear Power Plants,” and credit is taken for original equipment in meeting the guidelines identified in RG 1.97, installation of the original equipment in conformance with the licensing basis for seismic qualification is acceptable, provided the other guidelines identified in RG 1.97 and this BTP are satisfied. However, for all reactors, new instrumentation that is installed to satisfy RG 1.97 or to replace original equipment for which credit was taken in satisfying RG 1.97 should satisfy the seismic qualification guidelines identified in RG 1.100. Redundancy For Category 1 variables under Revisions 2 and 3 of RG 1.97, no single failure should prevent the operators from being presented information necessary to determine the safety status of the plant and to maintain the plant in a safe condition following an accident. Channels provided to monitor a Revision 2 or 3 Category 1 variable do not need to meet this criterion during channel maintenance, test, or calibration, provided the duration of such testing satisfies the