ML23024A154

Proposed Reactor Vessel Surveillance Capsule Withdrawal Schedule to Support Potential Subsequent License Renewal Activity

ML23024A154
Person / Time
Site:	Summer
Issue date:	01/23/2023
From:	James Holloway Dominion Energy South Carolina
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
22-227
Download: ML23024A154 (1)

Text

Dominion Energy South Carolina, Inc.

5000 Dominion Boulevard, Glen Allen, VA 23060 Dominion DominionEnergy.com Energy January 23, 2023

Attn: Document Control Desk Serial No.: 22-227 U. S. Nuclear Regulatory Commission NRANG: RO Washington, DC 20555-0001 Docket No.: 50-395 License No.: NPF-12

DOMINION ENERGY SOUTH CAROLINA VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 PROPOSED REACTOR VESSEL SURVEILLANCE CAPSULE WITHDRAWAL SCHEDULE TO SUPPORT POTENTIAL SUBSEQUENT LICENSE RENEWAL ACTIVITY

Pursuant to the provisions of Title 10 of the Code of Federal Regulations Part 50 (10 CFR 50), Appendix H, Dominion Energy South Carolina, Inc. (DESC), hereby submits the attached request for approval to add a new surveillance capsule withdrawal schedule in the Virgil C. Summer Nuclear Station (VCSNS) Updated Final Safety Analysis Report (UFSAR) Section 5.4.3.6.2.3, Removal Schedule.

10 CFR 50, Appendix H, Section 111.B.3 requires that changes to the withdrawal schedule be submitted in accordance with 10 CFR 50.4 and that the proposed schedule must be approved by the NRC prior to implementation. Per NRC Administrative Letter 97-04, a proposed change to the withdrawal schedule may be approved without a license amendment if the changes conform to the American Society for Testing and Materials (ASTM) Standard Practice E 185-82. The proposed request complies with ASTM E 185-82 as discussed in the Attachment.

There is no in-vessel capsule at VCSNS currently and the capsules previously withdrawn did not receive fluence greater than the projected peak vessel fluence for an 80-year or 100-year operation. To support the demonstration of reactor vessel integrity through the potential subsequent license renewal(s) at VCSNS, a capsule is planned to be inserted in the reactor vessel with a proposed withdrawal schedule to meet the requirements for a potential 80-year or 100-year operating period.

A detailed description of, and justification for, the proposed activity are provided in the Attachment and Enclosures to this letter, respectively. DESC requests NRC review and approval of this request by January 23, 2024, with a 60-day implementation period for incorporating the VCSNS UFSAR changes.

In accordance with 10 CFR 50.91, a copy of this request, with the Attachment and Enclosures, is being provided to the designated South Carolina State Official.

2. 1.

Enclosures:

1.

Attachment:

c!m:n~etter: Vice James Respectfully, 273-2768. Should Surveillance Station Westinghouse Aging 1 Subsequent Westinghouse Proposed President E. you Unit Analysis," Holloway have Revision -Nuclear Capsule 1 License Report any Subsequent Letter August to questions Withdrawal CGE-RV000-TM-ME-000004, Renewal: WCAP-18728-NP, VCSNS Engineering 2022 License UFSAR related None.

Schedule," Evaluation and to

Renewal: Section Fleet this Rev. submittal, September of Support Reactor 3, 5.4.3.6.2.3, Recommended "V.C.

Rev. please 9, Vessel Summer 2022 3, Removal contact "V.C. Integrity Nuclear Changes Summer Schedule Yan Docket Serial Time-Limiting Station Gao Page No. No.

to Nuclear at 50-395 22-227 Unit (804) 2 of the 3

Proposed

Revision

Dominion Virgil to C. VCSNS Summer Energy UFSAR Attachment South Nuclear

Section Carolina, Station 1

(VCSNS) 5.4.3.6.2.3, Inc.

(DESC)

Unit Removal

1 Docket Serial Schedule No. No.

50-395 22-227 4.0 3.0 2.0 1.0 TABLE

REFERENCES CONCLUSIONS PROPOSED INTRODUCTION OF

CONTENTS

................................................................................................................ CHANGES

AND..............

TECHNICAL

ANALYSIS....

Attachment

........................................ Docket Serial 1 -Page

................ No. No.

1 of 50 22

. 5 -395 -227 6 3 2 6

year must fluence. minimum meet above. Therefore, Capsule meet capsule (2 assembly 9.06 Effective GALL-SLR Appendix years Program schedule and wall at recommendations the remaining To 2.1 are as DESC 2.0 re-inserted preserve requirements The conformance. are x 8.64 tested neutron an 60 date, being listed determined fluence be the the x 10 of outage -year 38 (Fall Revise is PR existing withdrawn In of Therefore, Y: GALL-SLR must x 10 relative 19 Full H [4.2). plant for VCSNS (Fall proposed: in planning OPOSE the order 4.9 GALL-SLR this Capsule n/cm [4.1] change in license. untested 2027) VCSNS into is reach 19 Power 80 accordance fluence with the possibility for surveillance within additional capsule n/cm operation, years, 2039) the to to Capsule powers) (which 2 Recommendations satisfies a neutron of Unit as withdrawal to D CHANG reactor operation conform before remain Ywas [4.1] a fluence 2 Year at NUREG-2191 However, capsule. a standby UFSAR revise the [4.1] does, which provides the 1 has to allowable 22.4 EFPY recommended Y is recommended withdrawn recommendations. and includes (EFPY), and with end fluence tested [4.4], the vessel operate capsule to below not meet conservatively the The schedule ES through EFPY above the meets a mechanism the of the capsule VCSNS AN the of two one regulatory requirements the of schedule capsules 5 of Section to the ASTM range the irradiation 9.06 -times a 10% for ASTM between [4.1] D TECH satisfy the withdrawal of two the at -times subsequent 6 capsules and to Unit plant additional GALL-SLR 17.71 x 10 Fluence: which re-insert 5.4.3.6.2.3. 60-year standard of -times fluence, excludes the bias E requirements change already withdraw 1 surveillance NICAL NUREC-2191 for one to to EFPYwith peak 185-82 to one 80 experience be 19 end on obtain of states schedule to irradiation. the n/cm the reactor The ASTM period and is being tested initially Capsule ANAL years license require two-times end Capsule reinserted [4.1] the of one Capsule Specifically, and 2 SPEO peripheral 80-year, [4.3] a neutron two-times and of requirements a fluence 10% vessel of E of capsule satisfy inserted. Y during capsule YSIS [8.04 renewal fully only SPEO one-times Y below unbiased). fluence as the 185 extended pursued Y during beyond, the Since must and required -82 the the.1). satisfies staff Attachment 80 irradiated and wall assumed fluence Reactor should Capsule the withdrawal period.

-year the fluence, of 1.73 = 1.73