ML20083N619

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Forwards Rev 1 to Nutech Rept, Design Rept for Weld Overlay Repairs & Flaw Evaluations in Recirculation & RHR Sys
ML20083N619
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 03/29/1984
From: Gucwa L
GEORGIA POWER CO.
To: Stolz J
Office of Nuclear Reactor Regulation
Shared Package
ML20083N623 List:
References
NED-84-181, TAC-51407, NUDOCS 8404190241
Download: ML20083N619 (2)


Text

, > Georgta Power Corroar'y .

333 Piedmont Avenue Atlanta. Georg a 30308 Telephore 404 526-6526 Malog Address:

Post Oftce Box 4545 Atlanta. Georgia 30302 h

Georgia Power L T. Gucwa me souten mM SM Manager Nuclear Engineer ng and Chsef Nuclear Eng;neer NED-84-181 March 29, 1984 Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Cmmission Washington, D. C. 20555 NRC DOCKET 50-366 OPERATING LICENSE NPF-5 EDWIN I. HAICH NUCLEAR PLANT UNIT 2 DESIGN REPORT REVISION - RECIRCULATION AND RHR SYSTEMS ANALYSES AND REPAIRS Gentlenen:

By letter dated' June 8, 1983, Georgia Power Company (GPC) subnitted information regarding the analyses and repairs of Recirculation Systen and Residual Heat Renoval (RHR) Systen piping welds which were inspected during the 1983 Hatch Unit 2 maintenance / refueling outage and found to have unacceptable flaw indications. Enclosed as Attachnent 1 to that subnittal was Revision 0 of NUTECH report no. GPC-07-102, " Design Report for Weld

- Overlay Repairs and Flaw Evaluations in Recirculation and RHR Systens_ at E. I. Hatch Nuclear Plant, Unit 2."

Since our subnittal of June 8, 1983, NUTECH has - revised the design report. Enclosed herein are seven (7) copies of _ Revision 1 of the subject report. The revised NUIECH report supercedes that subnitted as Attachnent 1 in our June 8,1983 subnittal. ~ Sane of the changes in Revision 1 of the NUIECH design report include:

o Correction of recirculation systen conceptual drawing to add weld

. numbers inadvertently anitted.

o Correo ion of weld listing regarding through-wall depth of crack and ext < " (length) of cracking, o Addition of discussion on end cap replacanent.

o. Reassessment of maximarr ~ exial. shrinkage and maximtsn calculated

. stress.

Affected pages are so noted in the " Revision Control Sheet" contained in the 9 revised NUTECH report.

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GeorgiaPowerkh Director of Nuclear Reactor Regulation Attention: Mr. John F. Stolz, 011ef Operating Reactors Branch No. 4 March 29, 1984 Page 'IWo

'Ihe overall conclusions of the original report are not changed as a result of these revisions.

Subnittal of the revised NITIECH report cmpletes all transnittals regarding weld overlays on Hatch Unit 2.

By copy of this letter, a copy of .the revised NITIECH design report is being supplied to NRC Region II for their information.

Should you have any questions in this regard, please contact this office.

Sincerely yours, f *]~ & -- +

L. T. Gucwa JAE/inb Enclosures (7) xc: (all w/l encl.)

H. C. Nix, Jr.-

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

Senior Resident Inspector k

h 7700775 -