ML19105B163

NRR E-mail Capture - Request for Additional Information (RAI) for Voglte TSTF-412 Adoption LAR (L-2018-LLA-0731)

ML19105B163
Person / Time
Site:	Vogtle
Issue date:	04/15/2019
From:	John Lamb Plant Licensing Branch II
To:	Lowery K Southern Nuclear Operating Co
References
L-2018-LLA-0731
Download: ML19105B163 (2)

Text

NRR-DMPSPEm Resource From: Lamb, John Sent: Monday, April 15, 2019 10:24 AM To: Lowery, Ken G.

Subject:

Request for Additional Information (RAI) for Voglte TSTF-412 Adoption LAR (L-2018-LLA-0731)

Mr. Lowry:

By letter dated December 19, 2018, Southern Nuclear Operating Company, Inc. (SNC) submitted a license amendment request (LAR) for the Vogtle Electric Generating Plant, Units 1 and 2 (Vogtle), (Agencywide Documents and Access Management System Accession No. ML18353B056; EPID L-2018-LLA-0731) to adopt TSTF-412, Revision 3, Provide Actions for One Steam Supply to Turbine Driven AFW/EFW Pump Inoperable.

The U.S. Nuclear Regulatory Commission (NRC) staff has reviewed your application and determined that additional information is needed to complete its detailed technical review to make an independent assessment regarding the acceptability of the proposed amendment in terms of regulatory requirements and the protection of public health and safety and the environment. Enclosed is the request for additional information.

Thanks.

John REQUEST FOR ADDITIONAL INFORMATION Section 2.2 of Enclosure 1 of the LAR states:

SNC is not proposing any variations or deviations from the technical specification changes described in TSTF-412, Revision 3, or the NRC staffs model safety evaluation published in the Federal Register on July 17, 2007 (72 FR 39089).

Upon review of the LAR and comparison of existing Vogtle TS to the STS as modified by TSTF-412, there appear to be variations between the Vogtle Technical Specification (TS) and Standard Technical Specification (STS) and deviations in the adoption of TSTF-412.

Vogtle TS contain an existing Conditions A, B and C which allow for Completion Time in accordance with the Risk Informed Completion Time. STS as modified by TSTF-412 do not contain risk informed completion times.

Existing Condition C in Vogtle TS describes the situation where two AFW trains are inoperable. The associated Required Action is to restore Auxiliary Feedwater (AFW) trains to OPERABLE status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or with a Completion Time in accordance with the Risk Informed Completion Time. For the situation where two AFW trains are inoperable, the STS as modified by TSTF-412 require the plant to be in MODE 3 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and plant specifically appropriate lower MODE within a plant specifically appropriate time.

(1) Please provide an explanation of the variation between Vogtle TS and STS as modified by TSTF-412 as well as the deviations from the TS changes described in TSTF-412.

(2) Please provide a discussion of the need for a new Condition C in Vogtle TS, which describes a very limited case of two inoperable AFW trains, given the existing Condition C apparently applies to all cases of two inoperable AFW trains.

1

Hearing Identifier: NRR_DMPS Email Number: 922 Mail Envelope Properties (BL0PR0901MB37319D9DAE56A9F4BAC0F839FA2B0)

Subject:

Request for Additional Information (RAI) for Voglte TSTF-412 Adoption LAR (L-2018-LLA-0731)

Sent Date: 4/15/2019 10:24:15 AM Received Date: 4/15/2019 10:24:00 AM From: Lamb, John Created By: John.Lamb@nrc.gov Recipients:

"Lowery, Ken G." <KGLOWERY@southernco.com>

Tracking Status: None Post Office: BL0PR0901MB3731.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2596 4/15/2019 10:24:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: