ML20081E018

Submits Plant Unit 1 Cycle 5 mid-cycle Outage SG ISI Rept

ML20081E018
Person / Time
Site:	Braidwood
Issue date:	03/13/1995
From:	Kofron K COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
BW-95-0036, BW-95-36, NUDOCS 9503210110
Download: ML20081E018 (3)

Text

_

Commonwealth Edrwin Company

. Hraidwcx>d Generating Station

.-

• Route 01, Ikix 84 Braceville, 11.60607 % I9 Tel Hi%658 2Hnl hfarch 13,1995 BW/95-0036 U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

Braidwood Station Unit 1 Cycle 5 hfid-Cycle Outage Steam Generator Inservice Inspection Report Docket No. STD SD-456

References:

(1) NUREG-1276, Technical Specifications, Braidwood Station, Unit Nos. I and 2 Gentlemen:

Specification 4.4.5.5.a of reference (1) requires that within 15 days following the completion of each inservice inspection of steam generator tubes, the number cf tubes plugged or repaired in each steam generator shall be reported to the Commission in a Special Report pursuant to Specification 6.9.2.

During the Braidwood Unit 1 Cycle 5 Mid-cycle Outage which began on February 18,1995,an eddy current inspection of the steam generator tubing was conducted. One hundred percent of the steam generator tubing in each steam generator received a full-length bobbin coil probe inspection.

One hundred percent of the steam generator tubing was inspected at the top of the tubesheet, roll transition region, using a rotating pancake coil probe. A rotating pancake coil probe was also used to confirm and characterize all distorted indications at the tube support plates greater than I volt.

The inspection was completed on March 3,1995. The attachments summarize the results of this inspection, and include a tube plugging history for Braidwood Unit 1.

Please direct any questions regarding this submittal to Doug Huston, Braidwood Licensing Supervisor, (815) 458-2801, extension 2511. t Yours truly, o$

k. L. Kofro Station Manager Braidwood Nuclear Station KLK/Dil/dla o:\corresp\zesteno\. doc.

Attachments cc: S. G. DuPont, Sr. Resident hispector, Braidwood R. R. Assa, Braidwood Project Manager, NRR J. B. Martin, Regional Administrator, Rill k101M.J umpany 9503210110 950313 //

PDR ADOCK 05000456 h. I 0 PDR W l

1

. Attachment A A1M05 Plugging Results 1

SG 1 A . SG 18 - SG 1C - SG1D: -TOTALS l Total Tubes 4578 4578 4573 4578 18312 Previously Plugged, Tubes- 243 58 366 171 838 .

Total Tubes _

inspected This_.; l Outace - 4335 4520 4212 4407 17474 i A1M05 Tube -. I Support Plate ' I Muccable 235 41 315 180 771 1 Anti Vibration Bar -~

Weer ' 2 0 1 0 3 1 1

Confirmed' Wedge ' l Location Indication' 17 2 12 13 44 l l

' Top of Tubesheet ,

Circumferential- I Cracks : 4 0 11 0 15 Misc. Top of Tubesheet L Indications '- 4 1 1 1 7 A1M05 Total Tubes Plucced 262- '44~ 340 ~1 94 840' Restart Total Tubes Available ' 4073 4476 3872 4213 16634 Total Tubes Plugged 11.0 2.2 15.4 8.0 9.2 I

(%)

• All Circumferencial Cracks in the 1 A and 1C SGs plus the one Mixed Mode l Indication in the 1 A SG were " stabilized" with an inconel alloy 690 sleeve.

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