ML19224D572

Updates Status of 790608 RO 1 & RO 2,in Response to NRC 790626 Ltr.Ro 2 Is Voided.Further Infor Re RO 1 Welding Qualifications to Be Sent 790801

ML19224D572
Person / Time
Site:	Marble Hill
Issue date:	07/06/1979
From:	Coughlin J, Couglin J PSI ENERGY, INC. A/K/A PUBLIC SERVICE CO. OF INDIANA
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
CPPR-170, NUDOCS 7907120633
Download: ML19224D572 (2)

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PUB 8M 0706790094 SEP VICE INDtANA July 6, 1979 Director, Office of Inspection & Enforcement U. S. Nuclear Regulatory Com::ission Docket Nos.: STN 50-546 799 Roosevelt Road STN 50-547 Glen Ellyn, Illinois 60137 Construction Permit Hos.*

CPPR-170 CPPR-171 Marble Hill Nuclear Generating Station Units 1 & 2 Centlemen:

This letter is an up-date to the PSI June 8,1979 transmittal and a re-sponse to the June 20, 1979 tblephone conversation and June 26, 1979 NP.C transmittal.

The July 2 date for a final report cannot be met in that the Cherne Con-tracting Corporation has elected to requalify (see Reportable Incident No.

I up-date below) the particular welders to a procedure that will extend the wall thickness capabilities. The procedure is currently in the review /

approval cycle betwem PSI and Cherne. The July 2 date was established based ou re-qualification, utilizing Cherne Welding Procedure 1013021 -

2.25. Procedure 1013021 - 2.25 is approved but does not contain the ex-tended range or techniques Cherne virhes to accomplish at this time for a group of particular welders. The review /spproval cycle is expected to be cotplete and the welders re-qualified by August 1, 1979.  ;

Status Reportable Incident No. 1 The hne 8 transmittal should be corrected to indicate that fourteen (14) qualAfications were accomplished by eleven (11) welders using Charne Pr e cedura 14.6.1.77.

The current status is as follows:

The original qualifications were accomplished by placing the penetromater on the film side of the source. The procedure was correet; however, the interpretation was incorrect. For the eleven (11) welders originally qualified the status is as follows:

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7907120( 3 3 8

irector, Office of Inspection July 6, 1979 Pusuc& Enforcement SEmACE INO(ANA Three (3) re-qualifications were accomplished by the band test method (rather than by radiography) on their original test coupons and six (6) by the preparation and test of new coupons.

One (1) re-qualification could ant be acccmplished in that the original test coupon was not available, and the welder is no longer employed by Cherne. The production veld made by the individ"-? vas identified and cut out.

The re:aining four (4) will be requalified using the bend tc . .

method; however, the test c.oupons will be made fica velds made by Cherne Welding Procedure 1013021-2.25 in conjunction with revised procedure 13.3 Rn. 4 in order to extend their thickness quali-fications to unlimited. This vill be accomplished by August 1, 1979.

Reportable Incident No. 2 A review of Cherne Procedure Qualification Reports (PQR) Nos. ten (10),

eleven (11) and thirteen (13) was conducted based on their applicability to Cherne Welding Procedures 1013R11-4.5 and 101B021-5.0. It was con-cluded the precedures verts correctly qualified initially, and the con-cern expressed was incorrect and should not be construed to be a re-portable deficiency under the 10CFR50.55(e) requirements.

In sm=ury, this letter constitutes a status of Reportable Incident No.1, and eliminates, based on the above explanation, Reportable Incident No. 2.

A final report on Raportable Incident No. I will be forwarded to your office by August 1, 1973.

Sincerely,

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James Coughlin Vice President-Nuclear JC:jb cc: Director of Inspection & Enforcement #

U. S. Nuclear Regulatorv Co= mission Washington, D. C. 20555 E. R. Schweieinz, P.E.

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