Document: NUREG-0800
Document ID: 32a9be97-f6b6-4a3c-a565-ce0c914e5e92
Document Type: srp
Title: B-3
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550087.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
Revision 5 - March 2007 3. DESIGN BASIS Clause 3 of IEEE Std. 279-1971 requires in part that a specific protection system design basis be provided. The design basis should be reviewed to confirm that it has the following characteristics: • Completeness - The design basis should address all system functions necessary to fulfill the system's safety intent. The design basis for protection systems should be shown to address the requirements of 10 CFR 50 Appendix A, General Design Criterion (GDC) 20. Information provided for each design basis item should be sufficient to enable the detailed design of the I&C system to be carried out. All functional requirements for the I&C system and the operational environment for the I&C system should be described. As a minimum, each of the design basis aspects identified in IEEE Std. 279-1971 Clauses 3(1) through 3(9) should be addressed. • Consistency - The information provided in the design basis should be analyzed to confirm its consistency with the plant safety analysis, including the design basis event analysis of Chapter 15 of the SAR; the mechanical and electrical system designs; and other plant system designs. The design bases should not contain contradictory requirements. • Correctness - The information provided for the design basis items should be technically accurate. • Traceability - It should be possible to trace the information in each design basis item back to the safety analyses, plant system design documents, regulatory requirements, applicant/licensee commitments, or other plant documents. • Unambiguity - The information provided for the design basis items, taken alone and in combination, should have one and only one interpretation. • Verifiability - The information provided for the design basis items should be stated or provided in such a way as to facilitate the establishment of verification criteria, and the performance of analyses and reviews of the various protection systems. In addition to these