ML023430328

12/6/2002, ANO-1, Unit 1, Enclosure 2, Summary of Conference Calls on Steam Generator (SG) Inspection Results During 1R17

ML023430328
Person / Time
Site:	Arkansas Nuclear
Issue date:	12/06/2002
From:	Alexion T NRC/NRR/DLPM/LPD4
To:	Anderson C Entergy Operations
Alexion T W,NRR/DLPM,415-1326
Shared Package
ML023430538	List: ML023430328
References
TAC MB6339
Download: ML023430328 (2)

Text

Entergy Actions for TMI Tube Sever Concerns for ANO-1 ANO-1 Scope of Potential Concern

"* ANO-1 did not install Westinghouse or B &W 1-600 mechanical rolled plugs during the 1980's. Instead, ANO-1 used either welded, ribbed or explosive plugs

"* The first rolled plug was installed in the ANO-1 OTSG's in 1992 which was Alloy-690 material.

"* Review of past outage eddy current data revealed no wear indications have ever been detected at the tubesheet face

" ANO worked with Framatome, based on the criteria presented at the Feb. 1.

2002 meeting with the NRC, to determine the susceptible plugged tube list

" List included:

- UTS plugs removed and replaced at a later date,

- UTS plugs installed could have leaked and another type of plug was placed in the tube to seal the water in the tube, 690 plugs installed was rerolled/retorqued at a later date to possibly seal in water

"* A total of 12 tubes were determined to be susceptible to possible tube swelling Entergy Planned Actions During 1R17 Outage

"* ANO has no plans to remove any plugs during 1R17

" All susceptible tubes have been evaluated and a total of 63 neighboring tubes will be plugged. 4 stabilizers will be installed in the upper span due to the industry operating experience events

"* Some tubes will be plugged as an extra "buffer zone" downstream of plugged tubes

"* Eddy Current Analysis will be performed on all tubes surrounding susceptible tubes to ensure no wear is seen on tubes prior to plugging/stabilizing Enclosure 2

a-SEntergy IRI7 Steam Generator A Status Report FRAMATOME ANP 10/17/02 3.04 AM OTSG A OTSG B Test Type Leg Probe Extent Planned Acquired Resolved Planned Acquired Resolved soblbn Col Exam -....

Non-Sicwed Tubes COLD 510ULL UTELTE 12738 13734 13734 14220 14225 1422S Non-Sleeved Tubes HOT 510UL LTEUTE 4448 A" 487 467 Tubes wt3"Slesos COLD 510UL LSELTE 54 54- 121 121 Tubes w/W.Sfe.*es COLD 101UL LSELTE 176 3 m75 351 359 Total Bobbln Exams 14812 14810 14810 15176 15172 15172 Sleeve Bobbin Exam 31"GOOSleeves HOT 400UL USELSE 54 54 121 121 W 1600 Sleeves HOT 400UL USELSE 376 275 359 353 Total Sleeve Bobbin Exams 430 JIM 430 480 480m Sleeve *Point Exam 31"Sreevs -Upper Rolls HOT 400PP USEUSR 11 11 23 23 31" Sleeves - Lomer Rolls HOT 400PP NMRLSE 11 11 23 22 8(" Sleev - Upper Rolls HOT 400PP USEUSR 156 156 125 129 80" Sleeves -Loaer Roik HOT 400PP MSRLSE 156 156 129 129 Total Sleeve *Point Exams 334 334 _ 304 304 Lower Tubesheet Crevice

• Point Examlnation Lawer Tubeshel Crevice COLD 520FP LTSLTS 683 S83 290 290 Lower Tubesheei COLD 520FP LTSLTS 24 34 Total Lower Tubesheet Crevice *Point Examinations ___17 _17 290 290 Upper Roll #Poirrt Exurramrtlon Upper Roll Trnsit ion HOT 520PP UTEUTE 12074 12072 12072 13452 13448 13448 Re-Roll Transdton HOT 520PP UTEUTE 2104 2101 2101 1244 1244 Deep Re-Roll Transition HOT 520PP UTEUTE 4 4 Total Upper Roll .*Point Examinatons _1417_ 1 14182 1_17 148_ 14.W2 14M Selected .*PointExaminartons Denied Locations 08S-UTE HOT/COLD 520PP Various 122 122 92 G2 SSA MRPC Exam HOT 520PP Vanous 11 11 1 1 Total Seleced *Point Exams = 1 6; I3 Special IlnlerststDlagnostic)

MRPC Tubes Various 6 65 4n7 4"7 W

indicalions Various 758 758 S4"4 ____

Post Re-Roll Eddy Current Bobbin HOT 51OUL I5SUTE 1188 123 123 184 76 75

.1Poinl HOT 520PP UTEURI 188 178 122 154 76 71 Plug Visual Examination 20% BAW Ribbed PlJgs HOT 9 2% WeldedPlugs CHOT _4_I_"__,.__.36 -_18 100% WesfnghaZeýRbbed 10%65 ~!rePlugs COLD ___

1__I___ I___ _______

20% Welded PILus COD7-l EMý Disinbution: Entergy R.Henry. R Jones. OCC Framartme-ANp - G.Aigelas, B Ce-1. M.Boudreaux. Fast Track, Data Managemenl