PNO-III-85-022B, on 850719,scheduled Maint & Refueling Outage Concluded.Inservice Insp Revealed through-wall Cracks & Crack Indications on Welds in Recirculating Sys Piping. Repairs Made by Weld Overlay Method

PNO-III-85-022B:on 850719,scheduled Maint & Refueling Outage Concluded.Inservice Insp Revealed through-wall Cracks & Crack Indications on Welds in Recirculating Sys Piping. Repairs Made by Weld Overlay Method

ML20129J679
Person / Time
Site:	Duane Arnold
Issue date:	07/19/1985
From:	Boyd D, Shafer W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
References
GL-84-11, PNO-III-85-022B, PNO-III-85-22B, NUDOCS 8507230223
Download: ML20129J679 (1)

PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-III-85-22B Date July 19, 1985 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without veri- [

fication or evaluation, and is basically all that is known by the staff on this date.

Facility: Iowa Electric Light & Power Co. Licensee Emergency Classification:

Duane Arnold Energy Center Notification of an Unusual Event Palo, IA 52324 Alert Site Area Emergency Docket No: 50-331 General Emergency XX Not Applicable

Subject:

THROUGH-THE-WALL CRACK IN RECIRCULATION PIPING (SECOND UPDATE)

The unit resumed operation at 4:30 a.m. (CST), July 19, 1985, concluding a scheduled maintenance and refueling outage which began on February 2, 1985. During this outage, sch:duled Inservice Inspection and inspection as set forth in NRR Generic Letter 84-11 revealed several through-wall cracks and crack indications on welds in the Recirculating Syst:m piping. (See PN0s-III-85-22,22A).

These cracks and indications have been repaired by the weld overlay method. These repairs were monitored closely by Region III specialists and by analysis of the repair data by both the Office of Nuclear Reactor Regulation and Region III. All weld overlay repairs were found to be acceptable.

A r: circulating system integrity hydrostatic test was successfully completed on July 1, 1985. An integrated leak rate test (ILRT) was also successfully completed on June 30, 1985. These tests were reviewed and witnessed by a Region III specialist.

Preparations for restart and the unit restart were monitored by the resident inspectors.

The State of Iowa will be notified.

This information is current as of 9 a.m. (CST), July 19, 1985.

CONTACT:

/N D. Boyd 8

W. Shafer FTS 388-5546 FTS 388-5656 DISTRIBUTION:

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8507230223 850719 Rev. 07/06/84 PDR I&E PNO-III-85-022 PDR 6p 0{t