ML19046A063

NRR E-mail Capture - on the Standardized Plant Analysis Risk Model Question Regarding North Anna 1 and 2

ML19046A063
Person / Time
Site:	North Anna
Issue date:	11/05/2018
From:	Valentin M Division of Licensing Projects
To:	Aitken D Dominion Generation
References
Download: ML19046A063 (2)

Text

NRR-DMPSPEm Resource From: Valentin-Olmeda, Milton Sent: Monday, November 5, 2018 12:22 PM To: Diane Aitken

Subject:

On the plant mod question...

Diane, After discussing with the plant-response reviewers, we still have some questions that we are considering to submit as follow-ups. However, there might be a way to avoid them.

To do so, it might be worth considering to add the following items to the pending response for plant-modifications (the response for Question 4 on Topic #16 to be submitted on 11/16/18). Please consider the following inputs for the SPRA model run and include the final results (SCDF & SLERF importance values for the basic events in tables 5.4-2, 5.4-3, and 5.4-5 of the submittal) in your response:

• Use a FLEX DG failure rate of 10

• Use a high HEP value Please call me if you have any questions.

Respectfully, Milton Valentín, PM US NRC Division of Licensing Projects Beyond Design Basis Management (Fukushima)

Office of Nuclear Reactor Regulation Milton.Valentin@nrc.gov 301-415-2864 1

Hearing Identifier: NRR_DMPS Email Number: 801 Mail Envelope Properties (Milton.Valentin-Olmeda@nrc.gov20181105122200)

Subject:

On the plant mod question...

Sent Date: 11/5/2018 12:22:08 PM Received Date: 11/5/2018 12:22:00 PM From: Valentin-Olmeda, Milton Created By: Milton.Valentin-Olmeda@nrc.gov Recipients:

"Diane Aitken" <diane.aitken@dominionenergy.com>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 1000 11/5/2018 12:22:00 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: