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:
d, they shall be identified and evaluated to determine their applicability, adequacy, and sufficiency and shall be supplemented or modified as necessary to assure a quality product in keeping with the required safety function.” GDC 21, “Protection System Reliability and Testability,” requires in part that “redundancy and independence designed into the protection system shall be sufficient to assure that no single failure results in a loss of the protection function.” GDC 22, “Protection System Independence,” requires that “the effects of natural phenomena, and of normal operating, maintenance, testing, and postulated accident conditions on redundant channels do not result in loss of the protection function.” 10 CFR Part 50, Appendix B, Criterion III, “Design Control,” requires in part that “where a test program is used to verify the adequacy of a specific feature in lieu of other verifying or checking processes, it shall include suitable qualification testing of a prototype unit under the most adverse design conditions.” 2. Relevant Guidance If a referenced industry code or standard has been separately incorporated into NRC’s regulations, licensees and applicants must comply with that code or standard as set forth in the regulations. If the referenced code or standard has been endorsed by NRC staff in a regulatory guide, that code or standard constitutes an acceptable method of meeting the related regulatory requirement as described in the regulatory guide. By contrast, if a referenced code or standard BTP 7-11-3 Revision 5 - March 2007 has neither been incorporated into the NRC’s regulations nor endorsed by a regulatory guide, licensees and applicants may consider and use the information in the referenced code or standard, if appropriately justified, consistent with current regulatory practice. Regulatory Guide 1.75, “Criteria for Independence of Electrical Safety Systems,” endorses IEEE Std 384-1992, “IEEE Standard Criteria for