RA-25-0079, Part 21 Notification - Love Controller
| ML25079A082 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 03/20/2025 |
| From: | Flippin N Duke Energy Carolinas |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| RA-25-0079 | |
| Download: ML25079A082 (1) | |
Text
e__f_~ DUKE
~ ENERGY RA-25-0079 March 20, 2025 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555-0001
Subject:
Duke Energy Carolinas, LLC Catawba Nuclear Station, Unit Nos. 1 and 2 Docket Nos. 50-413 and 50-414 Part 21 Notification - Love Controller Nicole Flippin Vice President Catawba Nuclear Station Duke Energy CN01VP I 4800 Concord Road York, SC 29745 o: 803.701.3340 Nicole.flippin@duke-energy.com 10 CFR 21.21 In accordance with 1 O CFR 21.21 (d)(3)(ii) and (d)(4), enclosed is the required 30 day written notification of the identification of a defect for the Duke Energy dedicated Love Controllers. This information was initially reported to the NRG Operations Center on February 19, 2025 (i.e.,
There are no regulatory commitments contained in this letter or its attachment.
Please direct any questions or concerns to Sherry Andrews, Lead Regulatory Affairs Specialist, at 803-701-3424.
Sincerely, Nicole Flippin Vice President, Catawba Nuclear Station Enclosure www.duke-energy.com
U.S. Nuclear Regulatory Commission March 20, 2025 xc (with enclosure):
Mark Miller, Region II Administrator, Acting U.S. Nuclear Regulatory Commission Jack Minzer-Bryant, Project Manager U.S. Nuclear Regulatory Commission David Rivard, Senior Resident Inspector, Catawba Nuclear Station U.S. Nuclear Regulatory Commission
U.S. Nuclear Regulatory Commission March 20, 2025 Catawba Nuclear Station Part 21 Notification Per 10 CFR 21.21(d}(3} and (d}(4}
(i)
Name and address of the individual or individuals informing the Commission.
Nicole Flippin Vice President Catawba Nuclear Station 4800 Concord Road York, SC 297 45 (ii)
Identification of the facility, the activity, or the basic component supplied for such facility or such activity within the United States which fails to comply or contains a defect.
The basic component containing the defect which is the subject of this notification is the Limpet Love controller, supplier part number 54-834-838-8187-8160-8134-817 4, purchased and dedicated by Duke Energy, Catawba Nuclear Station, for use in nuclear safety related applications.
(iii)
Identification of the firm constructing the facility or supplying the basic component which fails to comply or contains a defect.
Limpet manufactured the Love controllers. The subject parts were procured as commercial grade and dedicated by Duke Energy, Inc., solely for use at Catawba Nuclear Station.
(iv)
Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply.
Manufacturer circuit board workmanship issues associated with the Love controller resulted in a failed controller installed in Catawba's 2A 1 emergency diesel generator room ventilation train and resulted in Catawba submitting licensee event report (LER) 2024-001-00. The loss of one emergency diesel room ventilation fan, under certain conditions, could cause a loss of safety function at elevated outside air temperatures and could result in a substantial safety hazard.
(v)
The date on which the information of such defect or failure to comply was obtained.
Duke Energy performed the evaluations required by 10 CFR 21 and Duke Energy procedures and determined this issue was 10 CFR 21 reportable on February 18, 2025.
(vi)
In the case of a basic component which contains a defect or fails to comply, the number and location of these components in use at, supplied for, being supplied for, or may be supplied for, manufactured, or being manufactured for one or more facilities or activities subject to the regulations in this part.
Duke Energy procured the commercial grade controllers, dedicated, and installed some of the subject controllers in safety related applications at Catawba Nuclear Station.
Eighteen of the subject basic components are installed in various safety related applications at Catawba Nuclear Station. Five of the subject basic components are available for use at Catawba Nuclear Station. The installed, and available, controllers have all been inspected and determined acceptable. Duke Energy did not sell, and
U.S. Nuclear Regulatory Commission March 20, 2025 currently does not plan to sell, or transfer, any of the affected controllers to any other utility.
(vii)
The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and the length of time that has been or will be taken to complete the action.
Catawba Engineering completed an evaluation which identified workmanship issues internal to the Love controller. The installed and 'available for use' dedicated Love controllers at Catawba Nuclear Station were inspected and determined to be acceptable for use. Procurement Engineering has enhanced the receipt inspection to ensure a thorough, internal visual inspection is performed for the Love controllers during the digital exam process, to be completed using appropriate tools to specifically look for any parts quality and workmanship issues. This is to include, but not limited to, PCB, soldered connections, sub-assemblies, piece parts, and conductors. Corrective actions have all been completed.
(viii)
Any advice related to the defect or failure to comply about the facility, activity, or basic component that has been, is being, or will be given to purchasers or licensees.
None.
(ix)
In the case of an early site permit, the entities to whom an early site permit was transferred.
This event does not involve an early site permit.