Document: NUREG-0800
Document ID: ac43f632-9db1-4857-9f56-bfba45965456
Document Type: srp
Title: * These are modifications to a plant’s design, operations, or other activities that require NRC approval. These modifica
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0232/ML023250195.pdf
Revision Date: 2023-06
Chapter: 19
Section ID: 19
CFR Part: 
CFR Title: 

Content:
ss of the shading of the figure. In the context of the integrated decisionmaking, the boundaries between the regions should not be interpreted as being definitive; the numerical values associated with defining the regions in the figure are to be interpreted as indicative values only. SRP 19-34 IV. EVALUATION FINDINGS The results of the reviewers’ evaluation should reflect a consistent and scrutable integration of the probabilistic considerations and traditional engineering considerations provided by the licensee or applicant and developed independently by the reviewers. To reach a finding of acceptability, reviewers will generally need to show that in light of a small or nonexistent increase in risk and a reduced level of conservatism, defense in depth and sufficient safety margins are maintained. Findings of acceptability should be supported with logical bases built from an evaluation of the considerations given in Section III of this SRP chapter. Reviewers should confirm that sufficient information is provided in accordance with the requirements of this SRP chapter and that the evaluation supports the following conclusions; these confirmations are to be included in the staff’s safety evaluation report. IV.1 General • The proposed change meets the current regulations unless it is explicitly related to a requested exemption or rule change, i.e., a "specific exemption" under 10 CFR 50.12 or a petition for rulemaking under 10 CFR 2.802. • The proposed change is consistent with the defense-in-depth philosophy. • The proposed change maintains sufficient safety margins. • When proposed changes result in an increase in CDF or risk, the increases are small and are consistent with the intent of the Commission's Safety Goal Policy Statement (Ref. 7). • The impact of the proposed change is monitored using performance-based strategies. • All safety impacts of the proposed change are evaluated in an integrated manner as part of an overall risk management