RA-23-0063, Notification of Deviation from BWRVIP Guidelines

Notification of Deviation from BWRVIP Guidelines

ML23102A188
Person / Time
Site:	Brunswick
Issue date:	04/11/2023
From:	Dewire M Duke Energy
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
RA-23-0063
Download: ML23102A188 (1)

Text

Brunswick Nuclear Plant 8470 River Rd SE Southport, NC 28461 April 11, 2023 Serial: RA-23-0063 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Brunswick Steam Electric Plant, Unit No. 1 Renewed Facility Operating License No. DPR-71 Docket No. 50-325 Notification of Deviation from BWRVIP Guidelines

Reference:

1. BWRVIP-76, Revision 1-A, BWR Core Shroud Inspection and Flaw Evaluation Guidelines, EPRI Report 3002005566, April 2015.

2. BWRVIP-278, Revision 0, Technical Bases for Revision of the BWRVIP-76 Core Shroud Inspection Program, EPRI Report 3002000650, December 2013.

3. BWRVIP-94, Revision 4, Program Implementation Guide, EPRI Report 3002019689, November 2020.

Ladies and Gentlemen:

The purpose of this letter is to notify the Nuclear Regulatory Commission (NRC) of a deviation from the inspection schedule guidance outlined in Boiling Water Reactor Vessel and Internals Project (BWRVIP) guidelines (i.e., Reference 1) for the Duke Energy Progress, LLC (Duke Energy), Brunswick Steam Electric Plant (BSEP), Unit 1. The inspection schedule for BSEP, Unit 1, was modified such that exam of the core shroud horizontal weld H1 was deferred to the 2026 Refuel Outage (RFO). In accordance with Reference 3, the acceptability of this exam deferral was documented and approved in a deviation disposition.

The deferral of the H1 weld inspection to the 2026 RFO was justified using a plant specific calculation. The methods used in this calculation were consistent with Reference 1. The calculational results demonstrate that structural margin is maintained with deferral of this examination to the 2026 RFO.

fa DUKE

~ ENERGY

U.S. Nuclear Regulatory Commission Page 2 of 2 The deviation disposition concluded that this inspection deferral will not result in a reduction of nuclear safety for BSEP, Unit 1. In addition to the plant specific calculation which demonstrates structural margin with the deferral, Reference 2 documents the low safety significance of the

'H1' weld. This change in schedule will not create additional risk.

This letter is being submitted for information only (i.e., no action is requested from the NRC staff) in accordance with Reference 3. This letter contains no regulatory commitments.

Please refer any questions regarding this submittal to Mr. Stephen Yodersmith, Brunswick Regulatory Affairs, at (910) 832-2568.

Sincerely, Mark R.

eWire Manager - Nuclear Support Services Brunswick Steam Electric Plant cc:

Ms. Laura Dudes, NRC Regional Administrator, Region II Mr. Luke Haeg, NRC Project Manager Mr. Gale Smith, NRC Senior Resident Inspector Ms. Lois James, NRC BWRVIP Project Manager Chair - North Carolina Utilities Commission