ML19340A231

Responds to Violations Noted in Insp Rept 50-270/73-17. Corrective Actions:Tagging Procedures for Motor Operator Breakers of Reactors Bldg Spray Sys Reviewed W/Personnel & RCS Heatup Limitations Reviewed by Station Review Committee

ML19340A231
Person / Time
Site:	Oconee
Issue date:	01/17/1974
From:	Thies A DUKE POWER CO.
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8001140846
Download: ML19340A231 (3)

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January. 17,'1974 l

Mr. Norman C. Moseley, Director Directorate of Regulatory Operations-Region II - Suite 818 230 Peachtree Street, Northwest Atienta, Georgia 30303 Re: RO:II:FJ 50-270/73-17 l

Dear Mr. Moseley:

Please find attached for your information and review responses to Items I. A.lb. (2), b. (3) and dg, contained in RO Inspection Report t

No. 50-270/73-17.

Duke Power Company does not consider any information contained in RO Inspection Report No. 50-270/73-17 to be proprietary.

Very truly yours, O.

A. C. Thies ACT:vr Attachment 4

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M DUKE. POWER COMPANY OCONEE NUCLEAR STATION - UNIT 2 RESPONSE TO B0 INSPECTION REPORT 50-270/73-17

. I.A.1.b.(2)'and (3)

Procedure Violations.

i-On October 1,1973, the motor-operated valves 2BS-1 and 2BS-2 in the reactor

~ building spray system were closed and the notor operator breakers were opened and white tagged to prevent inadvertent initiation of the spray system.

They were' tagged a second time on October 5, 1973 for Engineering Safeguards testing. During the period October 17-24, 1973, maintenance was' performed on the 2B building spray pump to repair a seal leak. On October 26, 1973, the performance of the reactor building spray pump 2B was checked using the reactor building spray system performance test PT/0/A/204/7.

Step 12.11 of

- the procedure requires that valve 2BS-2 be closed and its breaker be white tagged open.

Since this valve aircady had two white tags issued to it in this position, the operator signed the procedure step as having been completed, without issuing his own tag for the required test. After completion of the test,.the operator left the existing tags and signed off the procedure. step

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requiring removal of his white tag.

To avoid recurrence of a similar situation, the Oconee operating engineer reviewed this incident with the shift supervisors and they in turn with all shift personnel.

Strict adherence to procedures regardless of whether they 1

think that other actions have covered a step was emphasized to these personnel.

1 Furthermore, an additional step has been added to the reactor building spray i

j system performance test procedure, requiring the' test coordinator to personally verify that the breakers on-2BS-1 and 2BS-2 have been racked in or that he 3

-has personally notified the shift supervisor that they are still open for reasons other than for the test.

I. A.1.d Reactor Coolant System Heatup Limitations The Station Review Committee reviewed this incident again during its meeting of December 18, 1973. The committee concluded that either -reactor coolant 1

system heatup or depressurization would have been appropriate; however, 1%

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reduction of reactor coolant pressure would have returned the system within the heatsp limits r;ooner and would have been the best course of action to take.,

The Station Review Committee minutes of December 18, 1973 should provide sufficient information to close this item.

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