ML17250B261

Responds to NRC Bulletin 93-002, Debris Plugging of ECC Suction Strainers. Actions Currently Taken During Refueling Shutdowns & Prior to Return to Power Operations Meets Actions Stated in Bulletin

ML17250B261
Person / Time
Site:	Ginna
Issue date:	06/10/1993
From:	MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-93-002, IEB-93-2, IEIN-93-034, IEIN-93-34, NUDOCS 9306210029
Download: ML17250B261 (6)

Text

ACCELERATP9 DOCUMENT DISTRIBUTION SYSTEM REGULA~.Y INFORMATION DISTRIBUTIO

.SYSTEM (RIDS)

SUBJECT:

Responds to NRC Bulletin 93-002,"Debris Plugging of ECC Suction Strainers." Actions currently taken during refueling shutdowns 6 prior to return to power operations meets actions stated in bulletin.DISTRIBUTION CODE: IE11D COP1ES RECEIVED:LTR ENCL SIZE: TITLE: Bulletin Response (50 DKT)NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).

05000244 ACCESSION NBR:9306210029 DOC.DATE: 93/06/10 NOTARIZED:

YES DOCKET FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G 05000244 AUTH.NAME AUTHOR AFFILIATION MECREDY,R.C.

Rochester Gas&Electric Corp.RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)R D RECIPIENT ID CODE/NAME PD1-3 PD COPIES LTTR ENCL 1 RECIPIENT ID CODE/NAME JOHNSON,A COPIES LTTR ENCL D D INTERNAL: AEOD/DOA NRR/DRPW/OGCB NRR/DSSA NRR/SCSB RES/DSIR/EIB EXTERNAL: NRC PDR NRR/DE/EMEB NRR/DRSS/PEPB NRR/WJ3+-2~REG FILE 02 RGN1'ILE 01 NSIC D D NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTEI CONTACI'HE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT.504-2065)TO ELIMINATE YOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEEDI D TOTAL NUMBER OF COPIES REQUIRED: LTTR 14 ENCL 0

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',, ROCHESTER GAS AND ELECTRIC CORPORATION s, i~!p rotc star t o e9 EAST AVENUE, ROCHESTER N.K 14649.0001 ROBERT C.MECREDY Vice President Clnna Nuclear Production TEt.EPHONE AREA CODE ate 546 2700 June 10, 1993 U.S.Nuclear Regulatory Commission Document Control Desk Attn: Allen R.Johnson Project Directorate I-3 Washington, D.C.20555

Subject:

30 Day Response to NRC Bulletin No.93-02: Debris Plugging of Emergency Core Cooling Suction Strainers, dated May 11, 1993 R.E.Ginna Nuclear Power Plant Docket No.50-244 Ref.(a): NUREG/CR-2403, SAND 82-0927 Supplement No.1,"Survey of Insulation Used in Nuclear Power Plants and the Potential for Debris Generation," May 1982

Dear Mr.Johnson:

We have reviewed NRC Bulletin No.93-02 and the associated Information Notices 93-34 and 93-34 Supplement 1.We have also reviewed previously issued NRC Information Notices and generic correspondence related to the potential for debris plugging of PWR containment sumps.Based upon our review we conclude that the actions currently taken during refueling shutdowns and prior to return to power operations meet the requested actions stated in the subject bulletin.The ECCS design of Ginna Station does not utilize.RHR suction strainers sim'lar to those described in Information Notice 93-34, but utilizes a combination of concrete curbing, steel grating, and steel debris screen in the protection of the recirculation sump (sump'B')from entrance of debris.RG&E recognizes the significance of the potential for debris plugging of the containment recirculation sump.Sump'B'esign and protective features (discussed in Ref.a)and procedural actions described below are in place to ensure that this will not occur.It is not our practice to store fibrous air filters or other temporary sources of fibrous material inside the reactor containment.

Procedure A-3.1,"Containment Storage Inspection" establishes guidelines for equipment storage requirements inside containment during reactor operation.

The procedure is invoked during refueling outages just prior to return to power operations.

It requires the identification and evaluation of the list of materials and equipment to be stored within containment.

It also f fi fi I t"t:"'tt30bZi0029

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"ensures that materials that could potentially float and clog the sump are restrained or removed.Our review of this procedure and list of materials identified following our recently completed outage has identified no such temporary fibrous materials stored in-containment as described.

In addition, during refueling outages added measures are taken for foreign material exclusion purposes by laying hardware cloth over the sump'B'rating to minimize the entrance of debris.Following maintenance activities, sump'B's inspected and cleaned as necessary.

This inspection is independently verified by Quality Control.Based upon our review of the bulletin and the results of the inspection completed April 25, 1993 prior to startup from our refueling, outage, no fibrous air filters or other temporary sources of fibrous material have been identified.

The actions and reporting requirements requested by the bulletin have, therefore, been performed.

Very truly yours, Robert C.Mecredy GAH/288 Attachment Subscribed and sworn to before me on this.10th day of June, 1993 I c~r Veff: C ifLLEi~rtfVf.

Notary Public, State of lievr,'i/ark tAonroe Coun!y Commission Expitea October 31',39 xc: Mr.Allen R.Johnson (Mail Stop 14D1)Project Directorate I-3 Washington, D.C.20555 U.S.Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Ginna Senior Resident Inspector