ML19309G135

Responds to IE Bulletin 79-14.Assembly & Transmittal of Data to Bechtel for Computer Input Verification Delayed by Activities Re LER-15.Eight Items Identified Requiring Mod. Estimates Final Results Will Be Available Wk of 800414

ML19309G135
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	02/27/1980
From:	Goodwin C PORTLAND GENERAL ELECTRIC CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML19309G136	List: ML19309G135 ML19309G147 ML19309G153 ML19309G157
References
IEB-79-14, TAC-07551, TAC-11299, TAC-7551, NUDOCS 8005050020
Download: ML19309G135 (2)

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February 27, 1980 Trojan Nuclear Plant Docket 50-344 License NPF-1 Mr. R. H. Engelken, Director U. S. Nuclear Regulatory Commission Region V Suite 202, Walnut Creek Plaza 1990 N. California Blvd.

Walnut Creek, CA 94596

Dear Sir:

In my letter of October 30, 1979 regarding IE Bulletin 79-14, I stated that computer input verification required by that Bulletin would be reported af ter the Plant's next refueling.

During the December 1979 hearings before the Atomic Safety and Licensing Board for the Trojan Control Building, Licensee's representatives esti-mated that such erification for all piping in the Control-Auxiliary-Fuel Building Complex (Complex) would be completed by the end of January 1980 (Tr. 3382-83).

It is now evident that such date underestimated the amount of work involved and also did not take into account the fact that assembly and transmittal of the IEB 79-14 field walkdown data to Bechtel for the computer input verification had been delayed by the extensive walkdown and analysis activities related to the LER 79-15 " wall problem".

In light of our commitment to supply such information with respect to the Complex to the parties in the Control Building proceeding (see Tr. 3378-79), we intend to complete and report the results of the verification for piping within the Complex prior to the inspection of

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Portland GeneralBechicOcmviny Mr. R. H. Engelken February 27, 1980 Page 2 remaining piping inside Containment. At this time, approximately 75 per-cent of the piping in the Complex has been reviewed and computer veri-fication is approximately 40 percent complete.

Eight items out of approximately 500 reviewed have been identified as requiring modifica-tion. None of these eight items affect Plant operability. We now estimate that the results of the total verification for the Complex will be available approximately the week of April 14.

Sincerely, 1

0 kJ C. Goodwin, Jr.

Assistant Vice President Thermal Plant Operation and Maintenance CG/LWE/4sa10Al c:

Mr. A. Schwencer, Chief Operating Reactors Branch #1 Division of Operating Reactors U. S. Nuclear Regulatory Commission Mr. Lynn Frank, Director State of Oregon Department of Energy i

Control Building Service List L.