ML20101D032

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Forwards Nonproprietary Info Discussed 960306 Between Util & NRR Re ABB/C-E Nuclear Operations Welded Sleeves for Disclosure in PDR
ML20101D032
Person / Time
Site: Byron, Braidwood  Constellation icon.png
Issue date: 03/13/1996
From: Lesniak M
COMMONWEALTH EDISON CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9603190340
Download: ML20101D032 (42)
v • d • e


Text

{{#Wiki_filter:e Commonwealth Ediwn Company 14(X) Opus Place i Downen Grove, IL 60515 5701 March 13,1996 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

Subject:

Meeting Held March 6,1996, between Commonwealth Edison Company (Comed)and Office of Nuclear Reactor Regulation (NRR) Byron Station Units 1 and 2, Braidwood Station Units 1 and 2 NRC Docket Nos. 50-454/455: 50-456/457 The enclosed document contains all non-proprietary information discussed March 6,1996, between Comed and NRR regarding ABB/ Combustion Engineering Nuclear Operations Welded Sleeves for disclosure in the Public Document Room. If you have any questions regarding this correspondence, please contact this office. Sincerely, Al ZM Marcia T. Lesni' Nuclear Licensing Administrator cc: H. Miller, Regional Administrator-Rlli G. Dick, Byron Project Manager-NRR H. Peterson, Senior Resident inspector-Byron Illinois Department of Nuclear Safety-IDNS l 180159 ktaletbyrbwdtstmgenstseetsum,wpf 1 9603190340 960313 l PDR ADOCK 05000454 i P PDR 3 o / A Unicom Company

l i i l Comed /NRR MARCH 6,1996 ABB COMBUSTION ENGINEERING NUCLEAR OPERATIONS WELDED SLEEVES

AGENDA e INTRODUCTIONIOBJECTIVES [J. BLOMGREN] e ABB CENO SLEEVE DESIGN AND EXPERIENCE [D. STEPNICK] RECENT EVENTS l - PRAIRIE ISLAND OBSERVATION / PROCESS [R. PEARSON] - PRAIRIE ISLAND TUBE PULL RESULTS j [w. GAHWILLER/J. LAREAU] 1 - INSTALLATION PROCESS / INSPECTION CHANGES [J. LAREAU] t 4

i i -l AGENDA l l

  • OPERATING UNITS i

[D. AYRES] t e BASIS FOR BYRON BRAIDWOOD SLEEVE APPROVAL [J. BLOMGREN]

  • CONCLUSIONS

[J. BLOMGREN] I

I } l Comed /NRR 'l l I i INTRODUCTION / OBJECTIVES 1 1 [ i

~ .l f -l i 1 Comed /NRR l j l l OBJECTIVES e GET NRC CONCURRENCE FOR USE OF ABB CENO SLEEVES AT BYRONIBRAIDWOOD e PRESENT ABB CENO INFORMATION ON RESULTS OF PI TUBE PULLS e ABB CENO PLAN AND SCHEDULE FOR RESOLUTION OF SLEEVE ISSUES i l 1 i

l i i Comed /NRR l t OUTAGE SCHEDULE BYRON STATION l e TS CHANGE BYRON 1 SUBMITTED 5/19/95 i REQUIRED APPROVAL 2/96 i e UNIT OFF-LINE APRIL 5 l e ECT APRIL 11 TO APRIL 18 i e SLEEVING APRIL 22 TO MAY 5 e MANWAY INSTALLATION MAY 2 TO MAY 7 l MODE 4 MAY 14 e UNIT ON-LINE MAY 20

I Comed /NRR SLEEVE MEETING i i REQUEST FOR ADDITIONAL INFORMATION

  • ABB CENO SLEEVING HISTORY
  • PI RECENT EVENTS t

e INSTALLATION PROCESS ISSUES e NDE TECHNIQUES

  • PROCESS CHANGES l
  • OPERATING SLEEVES i

i

'l PRAIRIE ISLAND UNIT 1 i PRELIMINARY CONCLUSIONS i e WELD INDICATIONS ARE PROCESS INDUCED l t

  • PROCESS INDUCED FLAWS CAUSED BY INADEQUATE CLEANING i

OXIDES PRESENT IN ALL CASES NO INTERGRANULAR NATURE NO GROWTH INDICATED BY I COIL )

  • OXIDE INDUCED WELD INDICATIONS DETECTED BY NDE e STRUCTURAL INTEGRITY IS ADEQUATE e LEAK RATE SMALL I

l

^ t BYRON /BRAIDWOOD BASIS FOR ACCEPTANCE i e HISTORICAL PERFORMANCE OF SLEEVES e PROCESS CONTROLS l e IMPROVED INSPECTION i e ENHANCED UT PROCESSING j e ADDING VISUAL OF CLEANED TUBE (PROCESS INSPECTION) e + POINT EXAM i

I Comed /NRR k l l =, f b I ( ABB CENO SLEEVE DESIGN i EXPERIENCE

t f I ABB WELDED SLEEVE i DESIGN CRITERIA i e LEAKTIGHT TO > 6500 psi e LOW RESIDUAL STRESS i e CORROSION RESISTANT e INSPECTABLE I:100% U.T.N.T./ECT;l i

  • REPAIRABLE I; REWELD;l e STRUCTURAL REQUIREMENTS e MAXIMUM TUBESHEET COVERAGE
  • MINIMUM EFFECT ON HEAT TRANSFER l
  • PLUGGABLE 1

l l

0 O O CENO SLEEVING EXPERIENCE l DATE PLANT STANDARD PERIPHERAL ETZIRTZ ISE 1/96 PRAIRIE ISLAND 1 253 0 0 0 10I95 ANO2 0 0 627 0 10/96 ZION 1 911 0 0 0 1f96 ZION 2 182 0 0 0 6I94 PRAIRIE ISLAND 1 117 0 0 0 11/93 ZION 1 61 0 0 0 5/93 KRSKO O O 164 16 4/93 GINNA 51 0 0 0 11/92 PRAIRIE ISLAND 1 158 0 0 0 11192 ZION 2 170 0 0 0 6/92 ASCO1 0 0 49 5 419 2 GINNA 178 63 0 0 419 2 ZION 1 124 0 0 0 3/92 KEWAUNEE O 16 0 0 7/91 RINGHALS 3 0 0 46 22 4/91 GINNA 183 29 0 NA 450 DON 2 82 0 0 4/90 GINNA 198 48 0 31190 PRAIRIE ISLAND 1 62 0 NA 418 9 GINNA 408 107 10/89 ZION 1 445 0 9/88 PRAIRIE ISLAND 1 73 0 6/87 RINGHALS 2 571 NA 4187 PRAIRIE ISLAND 1 27 l 2/87 GINNA 104 10/86 ZION 1 128 5/86 RINGHALS 2 539 2/86 GINNA 36 6/85 RINGHALS 2 59 4!84 RINGHALS 2 1R__ 6178 263 886 43 l

i t 1 b Comed /NRR l i i i h L ti RECKN T EVEN TS i I i l I i l i l l

e PRAIRIE ISLAND SLEEVING HISTORY Date installed Plugged in Service 8704 27 0 27 8808 74 1 100 9001 63 0 163 9106 0 1 162 i 9210 158 1 319 9405 118 1 436 9601 285 41 680 i 2

i t SLEEVE INDICATIONS FROM EDDY t CURRENT t i e Volumetric Indications at Upper Sleeve Weld 25 old sleeves I no change over one 20 month cycle based on 1-coil and 3 coil RPC;l i 26 new sleeves Circumferential Indications at Upper Sleeve Weld e 4 old sleeves I no change over 20 month cycle based on l-coil and 3 -coil RPC;l 6 new sleeves No indications in parent tubing or sleeve away from the sleeve e weld

~; STEAM GENERATOR TUBE N s / / \\ / / T \\ N ) SLEEVE 3 s v 's N j ffff(f(ff 1 i i ^ j,' \\((( ( ( ( (( / ,s '/ UPPER WELD Q m s s 1ot of Tun t su t <*T s ~,, / s -s 's N j \\ / \\ N gg /y \\ / g s / N N / / \\ s / \\ \\ s / 25 1/2" , s s N / s s \\ p \\ / f s s N / s s / m / L MX'X^XX'x XXXXX>A ~ v r v . ir 6 1 / TUBE SHEET LOWER WELD 4 e Figure cosasurnoWhEteGINEEltfMC SLEEVE INSTALLATION 2

4 SLEEVE PULL - PURPOSE t i e identify physical condition which is source of ET Indications Evaluate Effect on Structural Integrity e identify Root Cause (Service or Process) e e Evaluate Leak Tightness Plant developed a 23 GPD(max) leak on 11/17/96 One Sleeve, R7C63, leaked 1 drop per 6 minutes under 750# Secondary Pressure e Received Encouragement from NRC j

SLEEVE PULL - TUBE SELECTION e R5C48 Single Circumferential Indication Installed 9210 1 Weld e R7C52 Multiple Circumferential Indication Installed 9405 4 Welds e R9C57 Single Circumferential Indication Installed 9210 1 Weld e R7C63 Volu;aetric Indication j installed 9210 2 Welds i e RSC74 Multiple Circumferential Indication Installed 9601 2 Welds

c 4 2 csestsEEEIHdnEhttOD5!tBMOC NOITALLATSNI EVEELS erugiF 9 DLEW REWOL TEEHS EBUT .f T A>XXX X< x'XX(>'XX/ , s s : / s N s N s s N s / s \\ / , s s , s s y , s s 2v s2 / s N / N-N \\ / / N s / \\ Y 02 s s s , s _f X, j,~ ' s TecusedoT fo / 0f" e p s DLEW REPPU N- / ((( ( ( ( ( (( ^ 1 ' (ff( 1f( ff s EVEELS )s, s s s s / EBUT ROTARENEG MAETS p'

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lool letti... u..p File: PIR5C49a Exam Date: 02/21/96 Time: 17:06 - 17:10 Channel: 1 Gote: SW i Hode: Hex Video Mode: OFF Video Filter: 0 Gaing 74.,0 dB_,Dact,0FF _ Offset: 0.0 db _ Pulser Voltage: 400,, X Axis: 142.000, Y Rxis: -0.060 AMP: 2% TOF: 0.370 us dB: -26.0 HP: 0.031 in Dpth: 0.031 9 1/2 V TPeak (%) 120 'Y 100 O.4-go

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Comed /NRR CONCLUSIONS o ROOT CAUSE INADEQUATE CLEANING

  1. CORRECTIVE ACTION CLEANING PROCESS CHANGED IMPROVED INSPECTION D

i BYRON /BRAIDWOOD BASIS FOR ACCEPTANCE e HISTORICAL PERFORMANCE OF SLEEVES j

  • PROCESS CONTROLS

[ i

  • IMPROVED INSPECTION e

ENHANCED UT PROCESSING e ADDING VISUAL OF CLEANED TUBE (PROCESS INSPECTION;l e + POINT EXAM i ')

,...c., ACRONYMS i l SCl/ MCI Single / Multiple circumferential indications sal /MAI Single / Multiple axial indications PV Permeability variation f VOL Volumetric indication l WZI Weld zone indication +PT Plus point probe design C SCAN Plan view of data B SCAN 0 - 360 degree cross section view B' SCAN Axial cross section SEM Scanning electron microscope UET Upper expansion transition

AIB GN) 810 Cccre QeretItg 15 stcry (te Icch:ry 1996) lht Leg Sieeve Estineted EFPY of Sleeve Qerstion (2) inat Temp (F) Type (I) <1 l I. $

2. 0
2. 5
3. 0
3. 5
4. 0
4. 5
5. 0
5. 5
6. 0
6. 5
7. 0 7.5lItKAL laghal 2 610 STAW 16 600 STAW

$71 $99 $9 16 1243 B ana 608 STAW SI 178 183 198 408 104 36 1858 PTAW 63 29 48 107 ~ ~ 247 Natrio Isisad l (4) $90 STAW 73 27 100 871E 253 187 158 62 . 590 Neunenes (4) S99 PTAW is 16 S ee 1 (4) 594 STAW 911 61 124 445 128 1669 Jasil 2 (4) $94 STAW 162 170 32 414 402 (4) Gil Rt1F 627 627 Jaghals 3 (4) 610 RI1F 46 46 SPiK 22 22 IM3 (4) 619 Rillt 164 164 SPif 16 16 Totti 1191 162 $28 146 1014 0 866 262 0 $77 128 0 177 0 63 6314 Osantlative Total 6384 4323 4361 3833 3087 2073 2073 1207 945 945 363 240 240 63 63 (3) Mtest (1) Ceste lype destgaatIons and thelt tetals ere as foliove: Tot al s STAW Stendardhhesheet siceves whero the welds ere Ia the As WIded condition PTAW 4586 Peripheral (Initlally Obrved) hbesheet sleeves where the welds are In the As Wided condition 87110 263 StandardTubesheet sieeves dere the upper weld has been Post WId Ibat 'tYeat ed 590 Rillr Roll 1Yanstalon sleeves where the weld has been Post Wid that 1Yeated Spit 837 Support P1 ate sisevss dere the welds have been' Post WId ikat 'lYeated 38 (2) EFPY of operation 1: based elther en deta recelved from the plant or estcuiated from the Iond fsetor published la Welear Engineering International for the period during which the sleeves have been la place. y Qorstlag time Is remaded to the neares 0.1 EFPY as of I 3mly 1995 k3),16 Siteves whleh ran for a year at Ringhals.3 before T hot was reduced are included in totals for 600 F s-(4)- Plants laspected.with I-coli or Plus Polat BCr probe}}

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