ML20039F629
| ML20039F629 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/05/1982 |
| 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 8201130166 | |
| Download: ML20039F629 (2) | |
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s c!$ "'o'o'c7" January 5, 1982 Mr. James P. O'Reilly, Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietm Street, Suite 3100 Atlanta, Georgia 30303 Re: Catawba Nuclear Station Units 1 & 2 Docket Nos. 50-413 and -414
Dear Mr. O'Reilly:
Pursuant to 10 CFR 50.55e, please find attached corrected Sig *"
O Deficiency Report SD-413, 414/81-29.
D V ry truly yours, pggg,j,
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40 S$ Y4,jagam.:e ice William O. Parker, Jr.
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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 2135 Devine Street Columbia, South Carolina 29205
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'.i CATAWBA NUCLEAR STATION REPORT NUMBER _: SD-413,414/81-29 REPORT DATE:
January 5, 1982 FACILITY:
Catawba Nuclear Station, Units 1 & 2
_ID_ENTIFICATION OF DEFICIENCIES:
Improper application of a Westinghouse type ECT current transformer, Part No. 7524AE8G16, 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 ambient U
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 49 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 ACT, ION:
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.