ML19304B154

Acceptance Review Determination (E-mail 10/31/19) Extension of TS 3.8.1.1 Allowed Outage Time

ML19304B154
Person / Time
Site:	Millstone
Issue date:	10/31/2019
From:	Richard Guzman Plant Licensing Branch 1
To:	Sinha S Dominion Energy Nuclear Connecticut
Guzman R
References
EPID L-2019-LLA-0177
Download: ML19304B154 (2)

Text

From: Guzman, Richard To: Shayan Sinha Cc: RidsNRRLIC109 Resource; Danna, James

Subject:

Millstone Power Station, Unit No. 2 - Acceptance Review Determination Re: Extension of Technical Specification 3.8.1.1 Allowed Outage Time (EPID: L-2019-LLA-0177)

Date: Thursday, October 31, 2019 12:07:15 PM Mr. Sinha, By letter dated August 14, 2019 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML19234A111), Dominion Energy Nuclear Connecticut, Inc. (the licensee) submitted a license amendment request for the Millstone Power Station, Unit No.

2. The proposed license amendment would revise Technical Specification 3.8.1.1, A.C.

Sources - Operating, to add a permanent Required Action a.3 that would provide an option to extend the allowed outage time (AOT) from 72 hours3 days <br />0.429 weeks <br />0.0986 months <br /> to 10 days for one inoperable offsite circuit. In addition, the licensee proposed a one-time exception to the new proposed Required Action a.3 that would extend the AOT to 35 days for one inoperable offsite circuit.

One-time use of the 35-day AOT would allow replacement of the Millstone, Unit No. 3, A reserve station service transformer, its associated equipment, and other 345 kV south bus switchyard components that are nearing the end of their dependable service life. This work is planned to take place no later than the fall 2023 outage (3R22) for Millstone, Unit No. 3.

By letter dated October 7, 2019 (ADAMS Accession No. ML19277B908), the NRC staff informed the licensee that supplemental information was necessary to enable the staff 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.

The licensee provided the requested information by letter dated October 22, 2019 (ADAMS Accession No. ML19304A294.

The purpose of this e-mail is to provide the results of the U.S. Nuclear Regulatory Commission (NRC) staffs acceptance review of this amendment. The acceptance review was performed to determine if there is sufficient technical information in scope and depth to allow the NRC staff to complete its detailed technical review. The acceptance review is also intended to identify whether the application has any readily apparent information insufficiencies in its characterization of the regulatory requirements or the licensing basis of the plant.

Consistent with Section 50.90 of Title 10 of the Code of Federal Regulations (10 CFR),

whenever a holder of an operating license under this part desires to amend the license, application for an amendment must be filed with the Commission fully describing the changes requested, and following, as far as applicable, the form prescribed for original applications. Section 50.34 of 10 CFR addresses the content of technical information required. This section stipulates that the submittal address the design and operating characteristics, unusual or novel design features, and principal safety considerations.

The NRC staff has reviewed your application, as supplemented, and concluded that it does provide technical information in sufficient detail to enable the NRC staff to complete its detailed technical review and 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. Given the lesser scope and depth of the acceptance review as compared to the detailed technical review, there may be instances in which issues that impact the NRC staffs ability to complete the detailed technical review are identified despite completion of an adequate acceptance review. If additional information is needed, you will be advised by separate correspondence.

Based on the information provided in your submittal, as supplemented, the NRC staff has estimated that this licensing request will take approximately 580 hours24.167 days <br />3.452 weeks <br />0.794 months <br /> to complete. The NRC staff expects to complete this review by October 2020 (i.e., approximately 12 months). If there are emergent complexities or challenges in our review that would cause changes to the initial forecasted completion date (greater than a month) or significant changes in the forecasted hours (greater than 25%), the reasons for the changes, along with the new estimates, will be communicated during the routine interactions with the assigned project manager. These estimates are based on the NRC staffs initial review of the application and they could change, due to several factors including requests for additional information, unanticipated addition of scope to the review, and review by NRC advisory committees or hearing-related activities. Additional delay may occur if the submittal is provided to the NRC in advance or in parallel with industry program initiatives or pilot applications.

If you have any questions, please contact me.

Rich Guzman Sr. PM, Division Operator Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Office: O-9C7 l Phone: (301) 415-1030 Richard.Guzman@nrc.gov