ML20097D984

Requests Mod to 810113 Order to Allow Extension Until Start of Cycle 8 for Implementation of Portions of Torus Attached Piping Mods Located within Drywell

ML20097D984
Person / Time
Site:	Hatch
Issue date:	09/10/1984
From:	Gucwa L GEORGIA POWER CO.
To:	Stolz J Office of Nuclear Reactor Regulation
References
NED-84-479, TAC-55977, NUDOCS 8409180066
Download: ML20097D984 (2)

Text

. Georgia Power Company 333 Piedmont Avenue Attanta, Georg!a 30308 Te!ephone 404 5264526 MaSng Address:

Post Office Box 4545 Atlanta. Georgia 30302 - g Georgia Power L T. Gucwa the soortem electoc sprem Manager Nuclear Engineenng and Chief Nuclear Engineer NED-84-479 September 10, 1984 Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz, dilef Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Ccmnission Washington, D. C. 20555 NRC DOQGT 50-321 OPERATING LICENSE DPR-57 EDWIN I. EA701 NUCLEAR PIANT UNIT 1 EXTENSION TO INSTALLATICE SCHEDULE FOR MARK I GNTADMENT LONG-TEBM PROGRAM Gentlemen:

ne Nuclear Regulatory Comnission issued an order dated January 19, 1982, for Plant Hatch Units 1 and 2 which modified a 1981 order by extending the cmpletion dates for the installation of plant modifications needed for empliance with the NRC staff's acceptance criteria for the Mark I Containment Iong-Term Progra (LTP) . he cmpletion date for Unit 1 ordered therein was "...no later than prior to the start of Cycle 7 for Hatch Unit 1...".

he elenents of Plant Hatch's extensive LTP, including the Plant Unique Analysis Report, have been cmpleted with the exception of the modifications to the Torus Attached Piping (TAP) on Unit 1. %e Unit 1 refueling outage prior to Cycle 7 is scheduled to begin on or about September 29, 1984. %e renaining TAP modifications have been scheduled for impleentation during this upcoming outage. However, the large anount of work related to safety and cmpliance with regulations which is scheduled to be performed within the drywell during this outage period makes the implenentation of modifications to sme 57 safety / relief valve tailpipe supports located within t' : drywell impractical within the limits of available time and personnel resources. We, therefore, request a modification to your January 13, 1981 order to allow an extension until the start of cycle 8 for the implementation of that portion of the TAP modifications which are located within the drywell. %ose portions of TAP located outside the drywell will be modified during the upcming outage in accordance with the existing schedule.

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Georgia Power d 1

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-Director'of. Nuclear Reactor Regulation

-U. 'S. Nuclear Regulatory Canaission Washington, D. C. 20555 Septaber 10, 1984 Page W o

%e maintenance and modification work scheduled for the upcming Unit 1 outage, which follows closely the arduous . seven-conth Unit 2 recirculation pipe replacement outage, presents an undue demand on the available~ personnel

- resources. In order to maintain the level of control and coordination necessary to assure plant and personnel safety, the impleoentation of see work needs to be rescheduled to future outages. In the specific case of the TAP modifications on safety relief valve piping supports, there is other .

, more pressing work. (e.g. equipnent qualification, recirculation pipe

. inspection and potential. repair) to -be accmplished within the very restricted workspace of the drywell. Further, the ability to properly

' supervise the implenentation of outage activities is limited by the nmber

~ of 'available qualified personnel. We, therefore, propose that the TAP-modifications within the drywell be performed during the next refueling

outage which precedes Unit l's cycle 8.

' As 'part of the Mark I Contalment Short-Term Progran (STP), the - NRC staff determined that a margin of safety of at least- two was available in the contaiment design. %is margin was sufficient to assure the ,

containment- function in the event of a design basis loss of coolant accident. % erefore, an adequate basis for continued plant operation exists

. through cepletion of the LTP. %e majority of the LTP which has already been cmpleted on Unit 1 has provided a very significant improvenent in the

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contalment's safety margin. We originally intended margins of safety in the contaiment design will have been largely restored by the improvements

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already acceplished under the LTP and the TAP. work outside the drywell which is to be accmplished during the upcming outage. %erefore, the requested extension can be granted without significant impact to the public health and safety.

c Your earliest attention to this request is solicited so that final planning for the upcm ing. Unit 1 outage can proceed. If you have questions regarding this request, please contact this office.

l~ Yours very truly,

/S $4

• L. T. Gucwa i

NEB /inb xc: J. T. ~ Beckhan, Jr.

H. C. Nix, Jr.

J. P. O'Reilly (NRC- Region II)

Senior Resident Inspector

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