Document: NUREG-0800
Document ID: 7f6b0af0-d79e-4704-9eac-aa03109a7731
Document Type: srp
Title: RISK-INFORMED DECISIONMAKING: TECHNICAL SPECIFICATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0425/ML042520260.pdf
Revision Date: 2023-06
Chapter: 16
Section ID: 16.1
CFR Part: 
CFR Title: 

Content:
d by the TS change (e.g., when changing TS for containment systems). f. Defenses against human errors are maintained, e.g., TS change requests should consider whether the anticipated operation changes associated with a change in an AOT or STI could change the expected operator response or introduce any new human errors not previously considered, such as the change from perfoming maintenance during shutdown to performing maintenance at power when different personnel and different activities may be involved. Rev. 0 - August 1998 SRP 16.1-8 g. The intent of the General Design Criteria in Appendix A to 10 CFR Part 50 (Ref. 15) is maintained. 2. Safety Margins The engineering evaluation conducted should assess whether the impact of the proposed TS change is consistent with the principle that sufficient safety margins are maintained (Principle 3). An acceptable set of guidelines for making that assessment are summarized below. Other equivalent decision guidelines are acceptable. Sufficient safety margins are maintained when: a. Codes and standards (e.g., American Society of Mechanical Engineers (ASME), Institute of Electrical and Electronic Engineers (IEEE)) or alternatives approved for use by the NRC are met, e.g., the proposed TS AOT or STI change is not in conflict with approved Codes and standards relevant to the subject system. b. Safety analysis acceptance criteria in the Final Safety Analysis Report (FSAR) are met, or proposed revisions provide sufficient margin to account for analysis and data uncertainties, e.g., the proposed TS AOT or STI change does not adversely affect any assumptions or inputs to the safety analysis, or, if such inputs are affected, justification is provided to ensure sufficient safety margin will continue to exist. For TS AOT changes, an assessment should be made of the effect on the FSAR acceptance criteria assuming the plant is in the AOT (i.e., the subject equipment is inoperable) and there are no additional failures. Such an assessment