ML19004A138

Letter to NuScale Power, LLC, Regarding Single Failure and the Inadvertent Actuation Valve

ML19004A138
Person / Time
Site:	NuScale
Issue date:	02/12/2019
From:	Margaret Doane NRC/EDO
To:	Bergman T NuScale
Cranston G V/nro/0546
References
LTR-18-0490
Download: ML19004A138 (1)

Text

February 12, 2019 Mr. Thomas Bergman Vice President, Regulatory Affairs NuScale Power, LLC 1100 NE Circle Boulevard, Suite 200 Corvallis, OR 97330

Dear Mr. Bergman:

The Commission has received your letter dated December 14, 2018, concerning the NuScale Power, LLC request to revisit and clarify the single failure criterion as it applies to devices that involve mechanical movement but that are considered as having passive single failures in the Chapter 15 safety analysis. The NRC staff is developing a policy paper on this issue for the Commissions deliberation. This is consistent with the staffs established approach of raising policy issues to the Commission that emerge during small modular reactor design certification reviews. Any additional policy issues that the staff may encounter during the review of NuScales application will be addressed through this established process for handling such matters. As discussed in the staffs January 17, 2019 letter (Agencywide Documents Access and Management Systems (ADAMS) Accession No. ML19008A270), the staff intends to work to resolve issues in accordance with the overall 42-month schedule.

If you have any questions or need additional information, please contact Robert M. Taylor, Director, Division of Licensing, Siting, and Environmental Analysis in the NRCs Office of New Reactors at 301-415-1634 or via e-mail at Robert.Taylor@nrc.gov.

Sincerely,

/RA/

Margaret M. Doane Executive Director for Operations