ML13140A269

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NRC Slides for 5/23/13 Meeting Regarding Risk - Informed GSI-191 Pilot Application Initial Review Insights
ML13140A269
Person / Time
Site: South Texas  
Issue date: 05/20/2013
From: Balwant Singal
Plant Licensing Branch IV
To:
South Texas
Singal B
Shared Package
ML13140A284 List:
References
TAC MF0613, TAC MF0614
Download: ML13140A269 (7)


Text

Risk-Informed GSI-191 Pilot Application Initial Review Insights Initial Review Insights May 23, 2013 y

Objective:

Provide high level review insights regarding the risk-informed portion of STPs pilot submittal, consistent with the intent of Regulatory Guide 1 200 with the intent of Regulatory Guide 1.200.

2

Review Area Regulatory Guidance

1. Risk-informed applications should include a complete list of changes made to the PRA in support of an application RG 1.174 states that data, methods, and assessment criteria used to support regulatory decisionmaking must be well support of an application, including but not limited to:

- Changes to basic event values decisionmaking must be well documented and available for public review.

- Changes to mission times

- Application-specific Human Reliability Analysis (HRA) summary summary

- Key Assumptions 3

Review Area Regulatory Guidance

2. Risk-informed applications should include a summary of all Facts and Observations (F&Os) identified by full or focused scope Modified PRA should meet guidance in Regulatory Guide 1.200.

identified by full or focused scope peer reviews and their resolution.

4

Review Area Regulatory Guidance

3. Risk-informed applications should address all hazard groups (e.g., seismic) and operational modes Regulatory Guide 1.174 states that the risk from a hazard group may be treated qualitatively if the licensee can demonstrate that the modes.

A technical justification should be provided if a particular hazard licensee can demonstrate that the risk contributions from the hazard group would not affect the decision.

group or operating mode is not germane to the application.

Regulatory Guide 1.200, Section 1.2.5 provides acceptable methods for screening seismic methods for screening seismic and other external hazards from further analysis.

5

Review Area Regulatory Guidance

4. Risk-informed applications LIC-101 states that NRC staff pp should clearly identify and describe all methods that have not been previously reviewed and accepted by the NRC must obtain all relevant information needed to make a regulatory decision on a license amendment request that is fully accepted by the NRC.

Documents referenced in a submittal but not previously amendment request that is fully informed, technically correct, and legally defensible.

reviewed and approved by the NRC staff should be submitted.

6

References 1.

An Approach for Using Probabilistic Risk Assessment in Risk-Informed Decisions on Plant-Specific Changes to the Licensing Basis. Regulatory Guide 1 174 Revision 2 May 2011 Guide 1.174, Revision 2. May 2011.

(ML100910006) 2.

An Approach for Determining the Technical Adequacy of Probabilistic Risk Assessment Results for Risk-Informed Activities Regulatory Guide 1 200 Assessment Results for Risk-Informed Activities. Regulatory Guide 1.200, Revision 2. March 2009.

(ML090410014) 3 NRR License Amendment Review Procedures LIC-101 Revision 4 May 3.

NRR License Amendment Review Procedures. LIC 101, Revision 4. May 2012.

(ML113200053) 7