ML13091A387
| ML13091A387 | |
| Person / Time | |
|---|---|
| Site: | Crane, Fort Calhoun  |
| Issue date: | 03/28/2013 |
| From: | Brosemer J Integrated Resources |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 48863 | |
| Download: ML13091A387 (1) | |
Text
03/28/2013 Part 21 (PAR)
U.S. Nuclear Regulatory Commission Operations Center Event Report PazelI Event#
48863 Rep Org: INTEGRATED RESOURCES, INC.
Notification Date / Time: 03/28/2013 15:53 (EDT)
Supplier: INVENSYS (FOXBORO METER CO.)
Event Date / Time: 03/27/2013 15:30 (CDT)
Last Modification: 03/28/2013 Region:
4 Docket #:
City:
NEBRASKA CITY Agreement State:
Yes County:
License #:
State: NE NRC Notified by: JOHN F. BROSEMER Notifications: GREG PICK R4DO HQ Ops Officer: HOWIE CROUCH PAUL KROHN RiDO Emergency Class: NON EMERGENCY PART 21 GROUP EMAIL 10 CFR Section:
DEBORAH SEYMOUR R2DO 21.21 (d)(3)(i)
DEFECTS AND NONCOMPLIANCE JULIO LARA R3DO PART 21 REPORT - FOXBORO POWER SUPPLY POTENTIAL FAILURES DUE TO DEFECTIVE TIE WRAPS AND HOLDERS Mr. John F. Brosemer, President of Integrated Resources, Inc., reported discovery of repeated defects in Foxboro Meter Company's N-2ARPS-A6, Style D power supplies. When manufactured, the power supplies utilized Thomas and Betts TC105A aluminum wire tie holders in random numbers and placements. As the power supplies age, the tie wrap holder adhesive degrades and the tie wraps embrittle resulting in the separation of the tie wraps and loss of holder adhesion to the power supply enclosure. This causes the wraps and holders to fall to the bottom of the enclosure which could result in shorts when the aluminum comes in contact with electronic components. In one particular power supply, all tie wrap holders in use failed and separated from the enclosure.
The power supplies are used in Foxboro SPEC-200 cabinetry that are used throughout the industry. At the time of this notification, Integrated Resources has one power supply from Three Mile Island and two power supplies from Ft. Calhoun undergoing refurbishment. Integrated Resources will be following up this telephonic notification with a written report once their internal investigation is done.
Recommended corrective actions are for affected facilities to open and inspect all power supplies and remove the aluminum tie wrap holders and replace the tie wraps and holders with Teflon types.