ML22277A725

Additions to Turbine Bldg Wind Load Audit

ML22277A725
Person / Time
Site:	Surry
Issue date:	10/03/2022
From:	John Klos NRC/NRR/DORL/LPL2-1
To:	Geoffrey Miller Dominion Energy
Klos J, NRR/DORL/LPL2-1
References
Download: ML22277A725 (2)

Text

John Klos From: John Klos Sent: Monday, October 03, 2022 9:07 AM To: gary.d.miller@dominionenergy.com Cc: John Klos

Subject:

Request for NRC Scope and Personnel additions to the Surry Turbine Bldg. Wind Load LAR electronic audit plan

Gary, I am writing to request that the Surry Turbine Bldg. Wind Load LAR electronic audit plan (ML22250A467) be amended with the following additions.

Please confirm receipt and if you have any comments or questions, please do not hesitate to contact me.

3.0 SCOPE The audit team will view the documentation and calculations that provide the technical support for the LAR.

The scope of the NRC staffs audit will focus on the following subjects:

1. Procedures governing the safe shutdown of the plant after a tornado, including a potential roof collapse scenario.

2. Availability of equipment required to achieve and maintain safe shutdown conditions after a potential roof collapse scenario.

3. Qualitative or quantitative risk insights based on the evaluation of a potential roof collapse scenario and their impact on the application.

4. The SSCs in the turbine building basement that were evaluated by the TMRE methodology.

5.0 AUDIT TEAM The following are the NRC audit team members:

Steven Alferink, Reliability and Risk Analyst, Steve.Alferink@nrc.gov De Wu, Reliability and Risk Analyst, De.Wu@nrc.gov Shilp Vasavada, Reliability and Risk Analyst, Senior Reliability and Risk Analyst, Shilp.Vasavada@nrc.gov.

Thanks in advance, John Klos DORL Mcguire, Surry Licensing Project Manager U.S. NRC, Office of Nuclear Reactor Regulation (NRR),

Division of Operating Reactor Licensing (DORL),

NRC/NRR/DORL/LPL2-1, MS O9E3 1

Washington, DC 20555-0001 301.415.5136, John.Klos@NRC.gov 2