ML20079N907

Documents 830124 Telcon Re Replacement of Selected Portion of Stainless Steel 4-inch Diameter Reactor Water Cleanup Return Line Piping

ML20079N907
Person / Time
Site:	Hatch
Issue date:	02/18/1983
From:	Gucwa L GEORGIA POWER CO.
To:	Stolz J Office of Nuclear Reactor Regulation
References
NED-83-097, NED-83-97, TAC-49156, NUDOCS 8303040463
Download: ML20079N907 (2)

Text

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_y .- i O Georma Pom Company

, 335 Pemuct hverm ANrda Geo'g+a 30308 Telephone 404 52fi 6S26 W:.ng Adten Po*,t Of+ce Boe 4545 Acada G<:crgta 30302 Georgia Power Power Generation Department khShhh9r February 18, 1983 Director of Nuclear 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 50-321 OPERATING LICENSE DPR-57 EDWIN I. HATCH NUCLEAR PLANT UNIT 1 RWCU RETURN PIPING REPLACEE NT Gentimen:

This letter documents the January 24, 1983 telephone conversation between Messrs. W. E. Burns and J. A. Edwards of Georgia Power Company (GPC) and Messrs. G. Rivenbark and W. S. Hazelton of the NRC staff. The conversation concerned the replacement of a selected portion of the stainless steel 4" diameter RWCU Return line piping at Plant Hatch Unit 1.

The subject piping is designated as ASE Code Class 2 piping.

A portion of the subject piping was replaced during the 1982 maintenance / refueling outage pursuant to a commitment made to NRC Region II by GPC. After installation was completed and the necessary functional tests f

(i.e., nondestructive tests and hydrostatic test) were performed, it was discovered that the replacment piping and fittings were not " conforming" material (e.g., "L" grade stainless eteel) es committed to NRC as a result of NUREG-0313, Rev. 1. " Nonconforming" pipir,; and fitting material (as ,

defined in the aforementioned NUREG) was used in error.

Mill certifications were reviewed for the replacement piping and fittings. Review indicated that the carbon content for the piping was .039 percent, thus, bordering on being "L" grade material. The two fittings (i.e., 450 elbows) used were found to have a carbon content of .049 and

.051, respectively. Based on the percentage of carbon involved with the replacment materials (particularly with the piping), Edwards indicated that it was GPC's desire to leave the replacement materials in place and requested NRC's concurrence in deviating (in this particular case) from the commitment to use "confaming" material when replacements are required.

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! Director of Nuclear Reactor Regulation l Attention: Mr. John F. Stolz, Chief Operating Reactors Branch No. 4 February 18, 1983 Page Two 4

Hazelton stated tnat the piping used would have been "L" grade stainless steel material under the old "L" grade specification (.040 % carbon) and was acceptable for use. He did suggest that the elbows be checked periodically because of their higher carbon content. The replacement of the selected portion of the subject ASME Code Class 2 RWCU line recently completed at Plant Hatch Unit 1 and the associated commitment deviation were acceptable l to Messrs. Rivenbark and Hazelton.

Please inform us if your understanding of this matter is different than that discussed herein.

Sincerely yours,

[N b L. T. Gucwa Chief Nuclear Engineer JAE/mb xc: J. T. Beckham, Jr.

H. C. Nix, Jr.

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

Senior Resident Inspector um i - . - - - - -

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