ML20086D402

Ro:On 760402,discovered That Boric Acid Heat Tracing Circuit 56 Had No Current Flow & Was Inoperative.Breaker Opened in Each Heat Trace Power Panels

ML20086D402
Person / Time
Site:	Robinson
Issue date:	04/02/1976
From:	Mcgirt J CAROLINA POWER & LIGHT CO.
To:	Knuth D, Moseley N NRC, NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20086D401	List: ML20086D402
References
NUDOCS 8312010435
Download: ML20086D402 (1)

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C;rolina P:wer & Lloht Compmyr

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H. B. RODINSON _ STEAM ELECTRIC PLAliT .

Post Office Box 790

, Hartsville, South Carolina April 2,1976 Robinson Filo No. 2-0-4--a-1

• Mr. Norman C. Moceley, Director Directorate of Regulatory Operations Nuclear Regulatory Commission Region II, Suite 818 . .-

230 Peachtree Street, N.V. . i,

• Atlanta, Georgia 30303 .

,Hr. Donald Knuth, Director

, Directorate of Regulatory Nuclear Regulatory Commincion Washington, D. C. 20545

Dear Siro:

In accordance with Section 6.6.2 of the Technical Specifications, the following Reportable Occurrence is reported: -

On April 2,1976, while performing PT-7.3, Boric Acid Heat Tracing, it uno diccovered that' Circuit 56 (primary) had no current flow and was inoperativo.

Circuit 56 (secondary) was operating properly. This circuit covers a portion of the charging pumps cuction lines.

Later on April 2, at 131.0, in order to r.ecuro power to repair Circuit 56, ca breaker uno opened in each of the two Heat Traco Power Panels. About 35 minuten later due to a temperature alam it van realized that theso breakorn and poweralso vaasupplied bothrentored.

primary and so,condary on Circuits 25 and 55, immediately These circuits cover. portions of the boric acid pump diocharge piping.

Thio con. ^,.ttutes an immediate Rcoortabic Occurrence as defined in Technical Specificationo 3.2.2.e and 6.9.2'.a.(2) . It was reported to the NRC, Atlanta and Mr. D. J. Furr of Carolina Power & Light Company on April 2,1976.

Yours very tru ,

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[ck B.,McGirt, Manager H. D. Robincon SEG Plant ACTtola 1

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8312010435 760416 ' '

PDR ADOCK 05000261 .

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