Document: NUREG-0800
Document ID: 4926757d-c89a-498c-a8cb-918908ab5496
Document Type: srp
Title: of the SAR should provide this information.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350467.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
to fail to function if failure adversely affects protection system performance. These components and systems are assumed to function if functioning adversely affects protection system performance. All failures in the-protection system that can be predicted as a result of an event for which the protec- tion system is designed to provide a protective function are assumed to occur if the failure adversely affects the protection system performance. In general, the lack of equipment qualification may serve. as a bases to assume failures. After assuming the failures of nonsafety-grade, nonquali- fied equipment and those failures caused by a specific event, a random single failure is arbitrarily assumed. With these failures assumed, the protection system must be capable of performing the protective functions required to mitigate the consequences of the specific event. 4. Section 4.3, Quality of Components and Modules - The applicant should confirm that quality assurance provisions of Appendix B to 10 CFR Part 50 are applicable to the protection system. The evaluation of the adequacy of the quality assurance program is addressed in the review of Chapter 17 of the SAR. 7.1-23 Rev. 0 - July 1981 5. Section 4.4, Equipment Qualification - The applicant should confirm that the protection system equipment is designed to meet the'functional perfor- mance requirements over the range of normal environmental .conditions for the area in which it is located. The applicant should confirm that a single failure within the environmental control system for any area in which protection system equipment is located will not result in conditions which could result in damage to thb protection system equipment nor prevent the balance of the protection system not within the area from accomplishing its safety function. In this regard, the loss of an environmental control system is treated as a single failure which should not prevent the protec- tion system from accomplishing its safety functions.