ML20069B391
| ML20069B391 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 12/15/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8112240198 | |
| Download: ML20069B391 (2) | |
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Re: Catawba Nuclear Station b/
Units 1 & 2 Docket Nos.'50-413 and -414 N
Dear Mr. 0'Reilly:
Pursuant to 10 CFR 50.55e, please find attached Significant Deficiency Report SD-413, 414/81-29.
Ve,ry truly yours, l
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William 0. Parker, RWO/php Attachment cc: Director Mr. Robert Guild, Esq.
Office of Inspection and Enforcement Attorney-at-Law U. S. Nuclear Regulatory Commission 314 Pall Mall Washington, D. C. 20555 Columbia, South Carolina ~29201 NRC Resident Inspector Palmetto Alliance Catawba Nuclear Station 2135h Devine Street 2
Columbia, South Carolina 29205 fpgqiAISOPY eu o
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p-CATAWBA NUCLEAR STATION REPORT NUMBER: SD-413, 414/81-29 REPORT DATE:
December 15, 1981 FACILITY: Catawba Nuclear Station, Units 1 & 2 IDENTIFICATION OF DEFICIENCIES:
Improper application of a Westinghouse type ECT current transformer, Part No. 7524A68G16, in the paralleling circuit of the static exciter voltage regulator system on the Catawba main diesel generators.
INITIAL REPORT:
On November 20, 1981, Mr. J. Bryant of NRC Region II, Atlanta, Georgia was notified of this deficiency by Mr. W. O. Henry, and Mr. W. J. Foley of Duke Power Company, Charlotte, NC 28242.
This notification was in response to Mr. Steven G. Schumacher (Transamerica Delaval) letter dated October 30, 1981, to Mill Power Supply Company.
SUPPLIER AND/0R COMPONENT:
Portec, Inc. Electric Products Control Division; Highland, Illinois supplied these CT's to Transamerica Delaval. The CT's are Westinghouse Type ECT current transformers, Part No. 7524A68G16.
DESCRIPTION OF DEFICIENCY:
The deficiency consists of an improper application of a Westinghouse Type ECT current transformer, Part No. 7524A68G16, in the paralleling circuit of the static exciter voltage regulator system on the Catawba main diesel generators. As presently applied, this transformer will operate outside of its rated temperature range whenever the anbient temperature at its location in the generator control panel exceeds 30 C.
The design ambient temperature where these current transformers are to g
be installed is 40 C.
ANALYSIS OF SAFETY IMPLICATION:
If the deficiency was not corrected a potential would exist for these current transformers to become thermally aged to end of life without this being detected. A failure of this current transformer could result in the Diesel Generating System being unable to perform its Class lE function due to a line to ground fault, or by degrading adjacent lE components.
CORRECTIVE ACTION:
In order to correct this deficiency, the Westinghouse current transformers will be replaced with current transformers that are designed for this appli-cation.
This work will be accomplished under NCI #13448.