ML20053C971

RO 82-007:on 820509,oxygen Concentration Exceeded Tech Specs Limit of 2% After Reactor Coolant Bleed Tank Was Returned to Svc After Maint.Nitrogen Purge Initiated on Tank to Reduce Oxygen.Erroneously Numbered

ML20053C971
Person / Time
Site:	Three Mile Island
Issue date:	05/11/1982
From:	Toole R GENERAL PUBLIC UTILITIES CORP.
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-82-007, RO-82-7, NUDOCS 8206030233
Download: ML20053C971 (1)

Text

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p OPU Nuclear

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g g7 P.O. Box 480 Madetown. Pennsylvania 17057 .

• 717-944-7621 .-

Writer's Direct Dial Number-3200-82-201 [

May 11, 1982 5211-82-122 y Mr. Ronald C. Haynes, Regional Administrator ,

I Office of Inspection and Enforcement ,

Region 1 [

Nuclear Regulatory Commission 1 j

631 Park Avenue King of Pruesia, PA 19406 -

g Subj ect Licetsee Event Report No.82-007 ,

Dear Mr. Haynes:

Re: Operating Licensee DPR-50 Docket 50-289  :

'Ihis telecopy.is to confirm the conversation between Mr. D. R. Haverkamp, Region l' NRC and Mr. R. 7. Tooln, Operations and Maintenance Director, TMI 1, at 1430 hours0.0166 days <br />0.397 hours <br />0.00236 weeks <br />5.44115e-4 months <br /> on May 11,1982. The event described belov was declared reportable at 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> this date. l At 0230 on May 9,1982, oxygen concentration exceeded the Technical Specification 3.22.2.5 limit of 2% af ter the "C" Reactor Coolant Bleed Tank was returned to ser-vice af ter being open for maintenance. A nitrogen purge was initiated on the RCBT to reduce the oxygen concentration. Oxygen was reduced to less than 2% by 1530 on May 10, 1982. Hydrogen concentration during this period was negligible.

Technical Specification 3.22.2.5 ves therefore considered to be violated since the oxygen concentration could not be reduced below 2% within one hour. This event is considered reportable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> in accordance with Technical Specification 6.9.2.A.(2).

A similar event oceurred on April 8,1982, but was considered not reportable at that ti ne since the event was a direct consequence of maintenance, not degradation, and since Technical Specification 3.22.2.5 was undarstood at that time to require that the limits for both 0,, and H2 be exceeded in order to consider the 140 to be violated.

This report Ac intendtd to cover that event also.

Iong term corrective action for the.se events requires revision of the Technical Specifications to specify limits that can be met.

The details of this occurrence and the corrective actions to prevent its recurrence will be provided within 14 days.

. N.

8206030233 820511 R. J. Toole PDR ADOCK 05000289 Operations & Maintenance S PDR Director, TMI 1 I O cc D. R. Haverkamp ,

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