HL-1158, Forwards Rev 0 to SIR-90-039, Flaw Evaluation & Weld Overlay Designs for Ei Hatch Unit 1 Spring 1990 Refueling Outage. Rept Details IGSCC Exam Results,Weld Overlay Design & Evaluation of Weld Shrinkage Stresses

From kanterella
(Redirected from ML20058K517)
Jump to navigation Jump to search
Forwards Rev 0 to SIR-90-039, Flaw Evaluation & Weld Overlay Designs for Ei Hatch Unit 1 Spring 1990 Refueling Outage. Rept Details IGSCC Exam Results,Weld Overlay Design & Evaluation of Weld Shrinkage Stresses
ML20058K517
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 06/29/1990
From: Hairston W
GEORGIA POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20058K520 List:
References
RTR-NUREG-0313, RTR-NUREG-313 GL-88-01, GL-88-1, HL-1158, NUDOCS 9007060312
Download: ML20058K517 (2)


Text

, .- .. .-

l Geoiga Power Company

'2 1033 Piedmont Acue

'. Atlanta Geo g:a 30308 Tuephone 404 520 3195 MadinDAddress.

- 40 inverness Center Pa4 way

~ Post Othce Box 1295.

.' Birmingham, Alabarna 35201 .

hephee 205 868-5581 J Ue soumem turtre systern W. G. Hairston. lH Sencor Wee President Nuclear Operattons HL-1158 I 000696 June 29, 1990 l U.S. Nuclear Regulatory Commission ATTN: Document Control Desk l: Washington, D.C. 10555  ;

.1 p  !

I.. PLANT HATCH - UNIT 1  !

l NRC DOCKET 50-321 l l: OPERATING LICENSE DPR-57 i l- IGSCC FLAW EVALUATIONS AND WELD OVERLAY DESIGNS i E UNIT 1 SPRING 1990 CONDENSER RETUBE/ REFUELING OUTAGE i

Gentlemen:

During the Spring 1990 Unit I condenser retube/ refueling outage, .;

l ' Georgia' Power -Company (GPC) inspected intergranular stress corrosion '

cracking (IGSCC) susceptible welds per our commitments to Generic Letter a (GL) 88-01 and NUREG-0313, Revision 2. . As a -result of these inspections, 1 twelve 28-inch . welds 'were found to require repair. By letter dated l April 30, 1990, GPC transmitted the proposed weld overlay designs for these q L- Ewelds and requested NRC permission to restart Unit 1. The NRC responded by 1 R . letter on May 17,.1990 stating, " ... when the identified welds have been  ;

repaired in accordance with the overlay designs, restart of the unit may be i safely conducted. We will, of course, expect to receive the full report of t the outage related inspection activities following-. restart of Unit- 1."

i Enclosed,- per your request, is a report detailing the IGSCC examination results, . weld overlay design (proposed and as-built) and evaluation of the weld. overlay shrinkage stresses.

9007060312 900706 '

i DR ADOCK 05000321 pdc n0\

v /

\Q

l U.S. Nuclear Regulatory Commission l' June 29, 1990 Page Two l

We believe this satisfies our commitment relative to IGSCC reports for '

the - Unit 1 Spring 1990 outage. A full report of the results of inservice inspection- (ISI) activities will be submitted per the Owners Data Report, i Form NIS-1. The ISI report will be submitted no later than 90 days after the. ISI outage activities were completed (i.e., by August 31,1990).

Please contact this office if you have questions.

Sincerely, id. -

I W. G. Hairston, III GKM/eb

Enclosure:

" Flaw Evaluation and Weld Overlay Designs For Plant E. I. Hatch $

Unit 1 Spring 1990 Refueling Outage," SIR-90-039, June 1990 c: Georaia Power Comoany Mr.- H. C. Nix, General Manager - Nuclear Plant Mr. J. D. Heidt, Manager Engineering and Licensing - Hatch t G0-NORMS 1

U.S. Nuclear Reaulatory Commission. Washinaton. D.C.

Mr. L. P. Crocker, Licensing Project Manager - Hatch-U.S. Nuclear Reaulatorv Commission. Reaion II Mr. S. D. Ebneter, Regional Administrator Senior Resident Inspector - Hatch i

I l l l- .

l l- l l

I I

i l

l 1 000696 l 1 l l-

-