ML24108A067
| ML24108A067 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 04/17/2024 |
| From: | Ryan Justice Dominion Energy South Carolina |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| 24-148 | |
| Download: ML24108A067 (1) | |
Text
Dominion Energy South Carolina V. C. Summer Nuclear Station Bradham Boulevard & Highway 215, Jenkinsville, SC 29065 Mailing Address:
P.O. Box 88, Jenkinsville, SC 29065 Dominion Energy.com Document Control Desk April 17, 2024 U.S. Nuclear Regulatory Commission Washington, DC 20555 DOMINION ENERGY SOUTH CAROLINA (DESC)
~
Dominion
- iiiiiii" Energy Serial No.
- 24-148 VCS-LIC/JB RO Docket No. 50-395 License No. NPF-12 VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) UNIT 1 CONDITION OF THE SERVICE WATER INTAKE STRUCTURE PROVIDED IN ACCORDANCE WITH LICENSE CONDITION 2.C.5.d Dominion Energy South Carolina hereby submits a summary of the condition of its Service Water Intake Structure, in accordance with the reporting provisions of VCSNS Facility Operating License Condition 2.C.5.d. A summary of the most-recent 2023 Service Water Intake Structure Diver's Inspection findings is enclosed.
Should you have any questions, please call Mr. Michael Moore at (803) 345-4752.
Sincerely, ustice Site Vic President V.C. Summer Nuclear Station Enclosure Commitments contained in this letter: None cc:
G. J. Lindamood - Santee Cooper L. Dudes - NRC Region II G. Miller-NRC Project Mgr.
NRC Resident Inspector
Serial No.24-148 Enclosure VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) Unit 1 DOCKET NO. 50-395 OPERA TING LICENSE NO. NPF-12 ENCLOSURE
VCSNS INSPECTION FINDINGS FOR SERVICE WATER INTAKE STRUCTURE Serial No.24-148 Enclosure Page 1 of 1 Engineering review of the most-recent SWIS inspection findings was documented in February 2024. This review found that there is negligible long-term consolidation-related settlement of the SWIS occurring, as expected based on previous inspections.
The inspection report confirms that the observed changes in individual cracks and patterns are minimal, consistent with previous inspection results, and indicate that there is not significant ongoing long-term structure settlement. Most of the changes in observed cracking can be attributed to underwater visibility at the time of inspection, as well as local effectiveness of pressure washing cleaning techniques prior to inspection.
The 2024 documented inspection results confirm the ability of the SWIS to perform its design basis function.
Below is a summary of the Service Water Intake Structure 2023 Diver's Inspection findings. The 2023 results were compared against the 2018 Diver's Inspection findings.
Number of Finding Description Cracks Not observed in 2023 inspection that were 17 noted in 2018 inspection New observed in 2023 inspection that were 2
not noted in 2018 inspection No change 25 Reduction in length and/or width from 4
previous inspection Increase in length and/or width from 3
previous inspection Additional missing grout from previous 1
inspection