ML20072A430

Forwards Rev 0 to Design Rept for Weld Overlay Repairs & Flaw Evaluations in Recirculation & RHR Sys. Sensor Check Will Be Performed Every 4 Hours in Addition to Interval Required by Tech Specs,Effective at Restart

ML20072A430
Person / Time
Site:	Hatch
Issue date:	06/08/1983
From:	Gucwa L GEORGIA POWER CO.
To:	Stolz J Office of Nuclear Reactor Regulation
Shared Package
ML20072A435	List: ML20072A430 ML20072A439
References
RTR-NUREG-0313, RTR-NUREG-313 NED-83-341, TAC-51407, NUDOCS 8306100132
Download: ML20072A430 (2)

Text

I g Georgia Power Company 333 Piecmont Avenue Atlanta, Georgia 30308 Telephone 404 526 6526 Ma;hng Address:

Post Ottice Box 4545 Atlanta. Georgia 30302 Georgia Power L T. Gucwa t?e southem eWJnc system Chiet Nuclear Engineer Power Generation Department E .83_341 June 8, 1983 Director of NtJclear Reactor Regulation Attention: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 NRC DOCKET 50-366 OPERATING LICENSE NPF-5 EDWIN I. HATCH NUCLEAR PLANT UNIT 2 REVISION TO TIE ANALYSES APO REPAIRS ON LARGE-DIAMETER PIPING WELDS SUBMI1TAL abo RCS LEAKAGE DETECTION SLRVEILLANCE C0h44ITMENT Gentlemen:

Georgia Power Company (GPC) submits as Attachment 1 to this letter the final version of the NUTECH design report for weld overlay repairs and flaw evaluations in Recirculation System and Rm System piping at Plant Hatch Unit 2. The final version of the design report supersedes the draft MJTECH design report submitted as Attachment 5 to our May 26, 1983 letter to you.

In Attachment 4 to the May 26, 1983 letter, GPC committed to augmenting leakage detection requirements for the rer tor coolant system (RCS) as a result of the discovery of unacceptabL , pe flaw indications in the Recirculation and R m systems. These new requirements were intended to incorporate the surveillance frequencies suggested in Section IV.B.l.a.2 of NJREG-0313, Rev. 1. The MC Hatch Licensing Project Manager has indicated, through conversation with GPC staff personnel, that additional commitments were required to meet the generic guidance stated in the subject NUREG.

Enclosed as Attachment 2 is a copy of our letter to you dated June 2,1983, which revises the requirements of RCS surveillance discussed in Attachment 4 to our May 26, 1983 letter.

Further, pursuant to a subsequent conversation with the NRC Hatch Licensing Project Manager on June 7, 1983, it was indicated that an additional commitment in addition to those in our May 25, 1983 and June 2, 1983 letters was required concerning RCS leakage detection system technical specifications. " Sensor" surveillance of the primary containment sump level and flow monitoring system was deemed necessary to assure operability.

Consequently, GPC commits to performing a " sensor" check at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> for the primary containment sump level and flow monitoring system. This

" sensor" check would be in addition to the surveillance already specified in Technical Specification 4.4.3.1.b and will be implemented at the time of restart following the current maintenance / refueling outage.

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8306100132 83060s DR ADOCK 05000366 PDR ll I J

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Georgia Power d Director of Nuclear Reactor Regulation Attention: . Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 June 8, 1983 Page Two This transmittal completes our submittal of information pertaining to the analyses and repairs of Recirculation System and RHR System piping welds observed to have flaw-like indications during the 1983 maintenance / refueling outage at Plant Hatch Unit 2.

A copy of this transmittal will be provided concurrently to the MIC regional office so they may assist in the review of the analyses and repairs performed.

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

Sincerely yours, cf 7 &c~*

L. T. Gucwa JAE/mb Attachments xc: J. T. Beckham, Jr.

H. C. Nix, Jr.

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

Senior Resident Inspector TlA)TTS

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