Document: NUREG-0800
Document ID: db9aeb59-557f-4a92-984d-d29d30600143
Document Type: srp
Title: B-4
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1601/ML16019A091.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
Revision 6 – August 2016 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 characteristics, the following should be noted about the parts of IEEE Std 279-1971, Clause 3. Clause 3(1) of IEEE Std 279-1971 requires in part the identification of conditions that require protective action. This information should be consistent with the analysis provided in Chapter 15 of the SAR. SRP Branch Technical Position (BTP) 7-4, “Guidance on Design Criteria for Auxiliary Feedwater Systems,” provides specific guidance on the failures and malfunctions that should be considered in identification of design basis events for systems that initiate and control auxiliary feedwater systems. SRP BTP 7-5, “Guidance on Spurious Withdrawals of Single Control Rods in Pressurized Water Reactors,” provides specific guidance on the reactivity control malfunctions that should be considered in the identification of conditions requiring protective action. The malfunctions assumed should be consistent with the control system failure modes described in Section 7.7 of the SAR and the reactivity control interlock functions described in Section 7.6 of the SAR. Clause 3(2) of IEEE Std 279-1971 requires in part the identification of