ML22025A375
| ML22025A375 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 01/25/2022 |
| From: | Lippard G Dominion Energy South Carolina |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 22-016 | |
| Download: ML22025A375 (1) | |
Text
V.C. Summer Nuclear Station Bradham Blvd & Hwy 215, Jenkinsville, SC 29065 Mailing Address:
January 25 2022 P.O. Box BB, Jenkinsvill e, SC 29065 Dominion Energy.com Attn: Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555-0001 DOMINION ENERGY SOUTH CAROLINA (DESC)
VIRGIL C. SUMMER NUCLEAR STATION (VCSNS) UNIT 1 SPECIAL REPORT 2022-001 P
Dominion
,iJ Energy Serial No.22-016 VCS UC/BAB/Rev 0 Docket No. 50-395 License No. NPF-12 INOPERABLE LOOSE-PART MONITORING SYSTEM CHANNELS Dominion Energy South Carolina, Inc. (DESC) hereby submits Special Report 2022-001 pursuant to the requirements of Technical Specifications (TS) 3.3.3.10 Action a and TS 6.9.2. This special report is required by VCSNS TS because Loose-Part Monitoring System (LPMS) Channel 9 has been inoperable for greater than 30 days and Channel 6 will be inoperable for greater than 30 days.
LPMS Channel 9, monitoring Steam Generator (SG) 'C', was declared inoperable on December 17, 2021. LPMS Channel 6, monitoring SG 'B', was declared inoperable on January 13, 2022. They were declared inoperable due to diminished signal strengths, most likely caused by intermittent electrical connections. SG 'C' LPMS Channel 8 continues to monitor SG 'C' for loose parts, without Channel 9 coincidence. SG 'B' LPMS Channel 7 continues to monitor SG 'B' for loose parts, without Channel 6 coincidence. Both channels have been disabled in LPMS. Loss of dual channel coincidence reduces one aspect of the false alarm filtering functionality. The failed transducers for Channel 6 (IAT00756) and Channel 9 (IAT00759) are scheduled for repair or replacement during Refuel 27 in Spring 2023.
Should you have any questions, please call Michael S. Moore at (803) 345-4752.
Sincerely, Georg
. Lippard Site Vice President V.C. Summer Nuclear Station Commitments contained in this letter: None cc:
G. J. Lindamood - Santee Cooper L. Dudes - NRC Region II G. Miller - NRC Project Manager NRC Resident Inspector