ML20072H017

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Responds to IE Bulletin 83-03 Re Check Valve Failures in Raw Water Cooling Sys of Diesel Generators.No Check Valves Installed in Cooling Water Sys at Facilities
ML20072H017
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 06/08/1983
From: Beckham J
GEORGIA POWER CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
REF-SSINS-6820, REF-SSINS-SSINS-6 IEB-83-03, IEB-83-3, NED-83-342, NUDOCS 8306290264
Download: ML20072H017 (3)


Text

a Georgia Power Corrpany 333 Piecmont Avnnue

, Atlanta. Georg a 30308

  • Telephone 404 526-7020 ,

MaSr'g Address Post OfSce Box 4545 Atlanta. Georg:a 30302 ATL tr ' mprya h k Georgia Power 83 JUN 15 P 8 : 28 J. T. Beckham, Jr.

Vce President and Ge eral Managrr Nuciear Generanon ED-83-342 June 8, 1983 lf. S. Nuclear Regulatory Commission

REFERENCE:

Office of Inspection and Enforcement RII: JPG Region II - Suite 2900 50-321/50-366 101 Parietta Street, NW I1E Bulletin Atlanta, Georgia 30303 63-03 ATTENTION: Mr. James P. O'Reilly GENTLEMEN:

Georgia Power Company (GFC) hereby submits the following information in response to NP.C I&E Bulletin 83-03, cated March 10, 1983. The subject bulletin - pertains to check valve failures in raw water ecollng systems of diesel generators. '

Item 1 Licensees are requested to review the plant pump and valve in-service test IST program required by Section XI of the ASME Boiler and Pressure Vessel Code and modify it if necessary to include check valves in the flow path of cooling water to the diesel generators from the intake to the discharge.

Response

l Pursuant to the requirements of I&E Bulletin 83-03, the IST programs for i Hatch thits 1 and 2 were reviewed. It was found that the IST programs did

! not include the check valves in the diesel generator plant service water cooling water lines. Unit I has check valves 1P41-F552A and IP41-F552C in l the cooling water discharge lines of the 1A and 1C diesel generators,

respectively. The Standby Diesel Service Water Pump, which supplies the i

18 diesel generator, has check valve 2P41-F321 at its discharge. There are no check valves in the cooling water systems for the 2A and 2C diesel generators on Unit 2. A review of the past maintenance history on the subject check valves revealed no significant trends or failures on check valves 1P41-F552A and C. Check valve 2P41-F321 has had a history of the disc sticking and the bonnet leaking. Maintenance has been required in the past to replace various internal parts of check valve 2P41-F321.

Item 2 For the valves described in Item 1, licensees are requested to examine the IST program and modify it if necessary to include verification procedures that confirm the integrity of the valve internals.

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Georgia Power d U. S. MJclear Regulatory Commission Office of Inspection and Enforcement Region II - Suite 2900 June 8, 1983 Page Two

Response

The three check valves in question will be visually inspected to verify valve integrity. Any necessary modifications to the IST program will be determined later pending the results of the valve internals visual inspectio,1.

i. Fem 3_

Licensees are Icqaasted to perform initial valve integrity verification procyoutes for valves identified in Item 1 prior to the end of the next refueling cutage coamencing arter Apejl 1,1983.

Response

All of t! e subject vrt1ves will be visually inspected with an engineering evaluat).on of ity? Jntegrity of the valve internals. Check valve 2P41-F321 vill be inspected prior to startup frcm the current traintenance/ refueling cuta.,)e. Valves IP41-F532A End C will be inspected prior to the end of the Unit I mciater.ance/ refueling outage which is scheduled to comence in February, 1984.

Item 4 Licensees are requested to submit a report to the IRC within 90 days of the date of this bulletin which lists the valves identified in Item 1 and describes the valve integrity verification procedure methods and schedule.

Response

Affected Valve Verification Method Completion Schedule 2P41-F321 Visual / engineering Prior to Unit 2 startup evaluation after completion of maintenance / refueling outage currently in progress.

IP41-F522 A and C Visual / engineering Prior to end of 1984 evaluation maintenance / refueling outage on Unit 1.

700776

Georgia Power d U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II - Suite 2900 June 8, 1983 Page Three Should you have any questions in this regard, please contact this office.

J. T. Beckham, Jr. states that he is Vice President of Georgia Power Company ar:d is outhorized to execute this oath on behalf of Georgia Power Company, and that to the best of his kricwledge and belief the facts set forth in this letter are tree.

GEORGIA POWER C0KoANY By: k

() J. T. Beckhain, JrT i

Sworn tg aid subscrioed before,me tnis 8th dry of June, 1983.

?' Notary Public, Georgta. State at Large l

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My Commisson Expires Sept. 20,1983 Notary Public JAE/mb Enclosure xc: H. C. Nix, Jr.

Senior Resident Inspector UStEC Document Control Desk (Washington) 700775