ML20140C014

Responds to Violations Noted in Insp Repts 50-317/85-31 & 50-318/85-26.Corrective Actions:Isolation Damper & Access Door Leakage Rates Measured & Leakage Rate in Duct Work Outside Control Room Envelope Estimated

ML20140C014
Person / Time
Site:	Calvert Cliffs
Issue date:	01/13/1986
From:	Tiernan J BALTIMORE GAS & ELECTRIC CO.
To:	Martin T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8601270206
Download: ML20140C014 (2)

Text

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BALTIMORE ~

GAS AND ELECTRIC

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CHARLES CENTER R O. BOX 1475 BALTIMORE, MARYLAND 21203 JOSEPH A.TsERNAN Vict PmEsiotNT NUCLEAR ENERG1F January 13,198o U. S. Nuclear Regulatory Commission Docket Nos. 50-317 Region I 50-318 631 Park Avenue License Nos. DPR-53 King of Prussia, PA 19406 DPR-69 ATTENTION: Mr. Thomas T. Martin, Director Division of Radiation Safety & Safeguards Gentlemen:

This refers to Inspection Report 50-317/85-31, 50-318/85-26; which identified apparent deficiencies in the area of Control Room Habitability. We have conducted a thorough review of the findings and have worked with Mr. P. Clemons of your office previously in this area.

Enclosure (1) to this letter is a written statement in reply to those findings noted in your letter.

Based on the information provided in Enclosure (1), we request you reevaluate the appropriate findings. Should you have further questions regarding this reply, we will be pleased to discuss them with you.

Very truly yours, b%4fAA -

JAT/SRC/gla Enclosure cc: D. A. Brune, Esquire G. F. Trowbridge, Esquire D. H. Jaffe, NRC T. Foley, NRC B601270206 860113 PDR O ADOCK 05000317-P D R '.

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O e ENCLOSURE (1)

REPLY TO APPENDIX A 0F NRC INSPECTION REPORT 50-317/85631; 50-318/8 5-26 FINDING 317/8 5631-01 We plan to measure the isolation damper and access door leakage rates, in addition to estimating the leakage rate in the duct work outside the Control Room envelope. A total inleakage rate will then be estimated and, if necessary, used in a new dose calculation for Control Room Operators. We will provide the results of the inleakage determination and dose calculation by February 1,198 6.

We will determine any appropriate corrective action, if necessary, when deficiencies are noted.

FINDING 317/8 5627-01; 318/85-2 5-01 1

The following maintenance deficiencies have been corrected:

oCracked panels in the air handling unit have been repaired (welded),

oAir leaks at the cooling coil penetrations have been sealed, and oLatches on duct windows have been replaced.

In addition to the missing screws and bolts, and holes at stress points on the fabric expansion joints, the following deficiencies were noted during the walkdown of affected ductwork:

oCrack in a panel for #12 Air Handling Unit, and oMissing plugs in test penetration holes in the ductwork.

These deficiencies will be corrected by April 1, 1986.

FINDING 317/8 5631-02 Licensee Event Report 8 5-014 (Unit 1) documented specific issues in this finding. The louvered dampers were repaired and shut on a Control Room high radiation signal.

The following corrective actions were taken:

oBroken blade bracke ts were replaced ,

oDamper linkages were adjusted, and oA sampling of similar dampers were inspected.

We intend to evaluate the isolation capability of the louvered dampers by measuring' the leakage through these dampers in the recirculation mode with the butterfly dampers open. This evaluation should be completed by April 1,1986.

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