05000400/LER-2022-005-01, Manual Reactor Trip Due to B Condensate Pump Motor Failure
| ML22332A494 | |
| Person / Time | |
|---|---|
| Site: | Harris  (NPF-063) |
| Issue date: | 11/28/2022 |
| From: | Hoffman D Duke Energy Progress |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| RA-22-0327 LER 2022-005-01 | |
| Download: ML22332A494 (1) | |
| Event date: | |
|---|---|
| Report date: | |
| 4002022005R01 - NRC Website | |
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£ a., DUKE
~ ENERGY~
November
, 2022 Serial: RA-22-0327 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Shearon Harris Nuclear Power Plant, Unit 1 Docket No. 50-400/Renewed License No. NPF-63 Subject: Licensee Event Report 2022-005-01 Ladies and Gentlemen:
David S. Hoffman Plant Manager Shearon Harris Nuclear Power Plant 5413 Shearon Harris Road New Hill, NC 27562-9300 10 CFR 50.73 Duke Energy Progress, LLC, submits the enclosed Licensee Event Report 2022-005-01 in accordance with 10 CFR 50.73 for Shearon Harris Nuclear Power Plant, Unit 1 (HNP). This report is a planned supplement to LER 2022-005-00 submitted on October 21, 2022. On August 28, 2022, with HNP in Mode 1, the reactor was manually tripped in response to an automatic trip of the "B" main feedwater pump caused by a trip of the "B" condensate pump (CP). The "B" CP tripped following an electrical failure of its motor caused by a lightning strike. This event had no significance with respect to the health and safety of the public.
There are no regulatory commitments contained within this report.
Please refer any questions regarding this submittal to Sarah McDaniel at (984) 229-2002.
David S. Hoffman Enclosure: Licensee Event Report 2022-005-01 cc:
P. Boguszewski, NRC Senior Resident Inspector, HNP M. Mahoney, NRC Project Manager, HNP NRC Regional Administrator, Region II
Abstract
Shearon Harris Nuclear Power Plant, Unit 1 400 3
Manual Reactor Trip due to B Condensate Pump Motor Failure 08 28 2022 2022 005 01 11 28 2022 1
100
Sarah McDaniel, Regulatory Affairs Engineer (984) 229-2002 C
SD MO S188 Y
On August 28, 2022, at 03:29 Eastern Daylight Time, with Shearon Harris Nuclear Power Plant, Unit 1 (HNP), in Mode 1 at 100 percent power, the reactor was manually tripped in response to an automatic trip of the B main feedwater pump (MFP) caused by a trip of the B condensate pump (CP). The B CP tripped following an electrical failure of its motor. The trip of the B CP resulted in subsequent trips of the B condensate booster pump and the B MFP as designed. In accordance with plant procedures, the operations crew manually tripped the reactor upon the trip of a MFP with initial reactor power greater than 90 percent. The A MFP tripped shortly after the manual reactor trip due to a low suction pressure condition created from the condensate and feedwater transient. The auxiliary feedwater pumps auto-started on low steam generator level as designed.
Safety systems functioned as required. This event had no impact on the health and safety of the public.
The B CP motor electrical failure was caused by a lightning strike. The design of CP motors and associated surge protection did not prevent motor damage and failure from a lightning strike. The B CP motor was replaced. The A CP and B CP motor surge protectors were inspected and tested, with no deficiencies identified. A study will be completed to determine changes needed to prevent future lightning induced failures of the CP motors. Page of 05000-
- 3. LER NUMBER YEAR SEQUENTIAL NUMBER REV NO.
E. Safety Analysis
The manual reactor trip had no impact on public health and safety. The reactor was manually tripped by control room operators as directed by plant procedures. The plant is designed for a loss of main feedwater and plant systems responded as expected for this condition. The condition did not result in a safety system functional failure and had no adverse impact on the health and safety of the public.
F. Additional Information
There have been no events at HNP similar to the event documented in this LER in the past three years.
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Shearon Harris Nuclear Power Plant, Unit 1 400 2022 005 01