Document: NUREG-0800
Document ID: ba447c99-c09a-4d8c-84cd-804a2261f17c
Document Type: srp
Title: MAINTENANCE RULE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0729/ML072920088.pdf
Revision Date: 2023-06
Chapter: 17
Section ID: 17.6
CFR Part: 
CFR Title: 

Content:
SSCs from service will be evaluated, since it is important to be aware of what MR function(s) is/are being lost so the impact of removing multiple SSCs from service can be determined. For qualitative | risk assessments, the program description should explain how the risk assessment and | management program will preserve defense-in-depth and plant-specific key safety functions. The maintenance risk assessment and management area of the program | description should address (but not be necessarily limited to) the following areas: | | A. Determination of the scope (or limited scope) of SSCs to be included in | 50.65(a)(4) risk assessments | B. Risk assessment and management during work planning, addressing qualitative, quantitative or blended approach in different modes of plant operation, pre-established plant risk categories or bands and basis (e.g., baseline core damage frequency multiples (address time limits), and/or incremental conditional core damage probability), defense-in-depth, preservation of key safety functions, standard risk management actions for the various risk bands, provisions for configuration-specific risk management plans C. Risk assessment and management of emergent conditions and updating risk assessments as maintenance situations and plant conditions and configurations are changed 17.6-10 Revision 1 - August 2007 D. Assessment (quantitative and qualitative capabilities) and management of risk of external events or conditions NOTE: The NRC and industry are considering amplification and clarification of | the guidance on consideration and management of the risk of external events or | conditions to better address fire (internal, external, and fire-risk-sensitive | maintenance activities), severe weather, internal and external flooding, | landslides, seismic activity and other natural phenomena, and grid/offsite power | reliability for grid-risk-sensitive maintenance activities (as addressed in NRC | Generic Letter (GL) 2006-02). The need for