ML20134Q155

Forwards Results of Cycle 6 mid-cycle Outage SG ISI

ML20134Q155
Person / Time
Site:	Braidwood
Issue date:	11/26/1996
From:	Tulon T COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
RTR-NUREG-1276 NUDOCS 9612020158
Download: ML20134Q155 (2)

Text

__

=

Commonweahh rAlison Company I firaidwood Generating Station Route

• 1, llox N 6 liraces ille, II. 6( OO*'-9619 Tel H15-iSH-2801 I

November 26,1996 U.S. Nuclear Regulatory Commission Document Control Desk j Washington, D. C. 20555 i

Subject:

Braidwood Station Unit 1 l Cycle 6 hiid-Cycle Outage l Steam Generator Inservice Inspection Report  !

Docket No. STN 50-456 i i

i

References:

(1) NUREG-1276, Technical Specifications, Braidwood Station,  ;

Unit Nos. I and 2

{

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

During the Braidwood Unit 1 Cycle 6 hiid-cycle Outage which began on October 12, 1996 an eddy current inspection of the steam generator tubing was conducted. An initial  !

sample size of 100% of all available hot-leg top-of-tubesheet roll transitions was selected.  ;

The inspection was conducted using the 3-coil Plus Point probe consisting of a Plus Point l coil, a 0.080 inch Pancake coil, and a 0.115 inch Pancake coil. The eddy current data was ,

analyzed using the EddyNet 95 software. The inspection was completed on November 22, l 1996. Attachments 1 and 2 summarize the results of this inspection.  !

Please direct any questions regarding this submittal to Douglas Huston, Braidwood Licensing Supenisor, (815) 458-2801, extension 2511.

Very tmly yours, l )}

.' J. Tulon '

g Station hianager Braidwood Station ry Attachments I cc: Senior Resident Inspector - Braidwood Braidwood Project hianager - NRR Regional Administrator-RIII 9612020158 961126 6

$2( PDR G

ADOcK 0500 0:\cfpl\timitrs\96014. doc A l'nicom Compan)

,. Attachment 1 Braidwood Unit 1 A1P02 SG Eddy Current Results Number of Tubes With indications Indication 1A SG 1BSG 1C SG 1D SG Total SCI - Single Circumferential Indication 146 250 543 245 1184 MCI - Multiple Circumferential Indication 75 26 67 48 216 sal- Single Axial Indication 1 17 3 6 27 4

MAI - Multiple Axial Indication 0 3 0 2 5 4

MMI- Mixed Mode indication 2 3 6 3 14 i

MBM - Manufacture Bumish Mark

! (Not a repairable indication) 1 0 0 0 1 Total Number of Indications 225 299 619 304 1447 Total Repairable Tubes

• 224 295 618 299 1436

• Some tubes have more than one type of indication Attachment 2 Braidwood Unit 1 A1P02 Inspection / Repair Overview Number of Tubes With Indications Indication 1 A SG 18SG 1C SG 1D SG Total .

Circumferential 221 276 610 293 1400

Axial 1 20 3 8 32 ,

Mixed Mode 2 3 6 3 14 Total Repairable indications 224 299 619 304 1446 Total Repairable Tubes

• 224 295 618 299 1436 Tubes Sleeved 181 0 445 271 897 Tubes Stabilized and Plugged 43 295 173 28 539 2

Tubes Miss Plugged 0 1 0 0 1

A1P02 Equivalent Plugged Tubes 53.5 296.0 198.9 43.8 592.2 1 Tubes Previously Plugged 549 128 743 397 1817 Total Tubes Plugged 602.5 424 941.9 440.8 2409.2 Total Equivalent Plugging 13.2 9.3 20.6 9.6 13.2

• Ten tubes have more than one type of indication k

i