ML20149H742

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Rev 0 to 5.2.2-BRW-97-0667, Evaluate Tendon H4ED for Broken/Unseated Wires
ML20149H742
Person / Time
Site: Braidwood Constellation icon.png
Issue date: 07/10/1997
From: Montgomery R, Namperumal R, Valathur M
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20149H729 List:
References
5.2.2-BRW-97-06, 5.2.2-BRW-97-0667-R0, 5.2.2-BRW-97-6, 5.2.2-BRW-97-667-R, NUDOCS 9707250147
Download: ML20149H742 (18)
v • d • e


Text

. - _ . .- . __ _ ~ . . . _ _ _ . . _ . . _ _ . . . . _._ _ _ _ _ . _ _ . . _ _ . _ . - . _ . _ _ . _ _ _ _ _ _ _ _ _ _ _

NEP-12 03 Nucirr D=ign Information Tranamittal

@' Saf6ty Related Originating Organization:

O'Non-Safety-Related 0 Comed NDIT No; BB-EXT-1293 O Regulatory Related @Other(specify) Sament a Lundy Station: &sidwood Unit: .2 Page 1. of 1 Design Change Authortty No.: N/A

i. System Designation: RB To: D. Christiana-BRW

Subject:

7 Unit 2 Containment Tendon H4ED l i b.

-~

R. Montoorngv Project Enoineer 7LiggI

Properor Poestion Preparere S~gnendre Date l- D. C. Patel Prolect Manaaer T [A Renewers Signature ~

f . 7/.10/97 4

j Romewer Poeftson Date i

Status of Information: @ Approved for Use O unvenfied O Engineering Judgement j Method and Schedule of Verification for Unveriflod NCITs: bl(f

f. Description of Information:

Sargent & Lundy (S&L) has evaluated the Unit 2 containment structure assuming that all unseated wk.. m Tendon H4ED are broken. Our evaluation, which is documented in the attached Calculation 5.2.2-E" .97-067,

' Revision 0, has shown that the contcinment structure is adequate and that stress levels remain below the allowables.

Purpose of lssuance: To document the resuts of S&L's evaluabon of the Unit 2 containment structure due to broken / unseated wires found in Tendon H4E0 during the recent %eter tendon' Inspection.

i Source of Information: Calculation #5.2.2 BRW 97 0667, Revision 0

! Distribution

  • l Site E&C Library (1/1) D. L. Leone /J. Bojan/J. Saltarelli (EM)

T. Johetson (1/0) D. C. Patel (EM)

J. Panfil (1/0) P. H. Kirsch / File 4.2 (Original) ,

4 B/B File 1.0 (1/1)

Pro}ect No.:2 50-061 Flie No.: t0 Chron No.:

nInpavam\ncit1293. doc V

coraronen Escirone Form Page 1 of 1 FWe:12038 8c~oc See NF.P Tatne of Contents leause: 12/1&95 i 4

'- 9707250147 970718 9 PDR ADOCK 05000457 O PDR g ,

,. _, u _ _. - - _ . . _

COMMONWEALTH EDISON COMPANY Exhibit C ,

- NEP-12-02 1 Calculation Title Page .

a.y,.jon 4 I- .,

Calculation Nc.: 5.2.2 BRW-97-0657 Page No.: 1  ;

@ Safety Related O Regulatory Related O Non-Safety Related l

Calculation Tiths: Evaluate Tendon H4ED For Broketvunseated Wires l l

l I

I Station / Unit: 2 System Abbreviation: RB Equipment No. (r app

  • Project No. (if app.) 9050-63 1

=

Rev.: O Status: Approved QA Serial No. or Chron No. Date:

Prepared by: R. Namoeimmal/ 7.M-In. M Date: 7/9/97 Revision Summary: Originalissue Added pages 1 thru 6 Attachment A, pages A t thru A9 Attachment B, pages B1 and 82 Attachmer:t C, pages C1 and C2 Electronic Calculation Data Files Revised:

(Name ext / size /cate/hourt mmNenreaten twJwd/ remarks)

Do any assumptions in this calculatlon require later verification? O Yes @ No Reviewed by: ,,M Valathur/ 4'/ PPM- Date: 7/9/97 Review Method: Comments (C. NC or Cl): NC Detailed Approved by: R. Montaomerv/ 2.N / Date: 7//O / S"7 rhe47 l-

i Enibit C f

  • NEP-12 02 1 Revision 4 l i

l COMMONWEALTH EDISON COMPANY l

CALCULATION REVISION PAGE .

i CALCULATION NO. 5.2.2 BRW-97-0667 -

PAGE NO.: 2 )

REV:O STATUS: OA SERIAL NO. OR CHRON NO. DATE: j PREPARED BY:. DATE:

1 REVIS!OfI

SUMMARY

l.

I CALCULATION FILES REVISED: l (Name ext / size /date/houn min / verification method / remarks)

DO ANY ASSUMPTIONS IN THIS CALCULATION REQUIRE LATER VERIF! CATION O YES O NO 4

4 REVIEWED BY:, DATE REVIEW METHOD: COMMENTS (C, NC or Cl): l APPROVED BY: ,,,, DATE.  !

\

REV: STATUS: QA SERIAL NO. OR CHRON NO. DATE:

PREPARED BY: , DATE:

4 REVISION

SUMMARY

l j

I CALCULATION FILES REVISED:  ;

i (Name ext / size /date/ hour: min / verification method / remarks) l

\

00 ANY ASSUMPTIONS IN THIS CALCULAilON REQUIRE LATER VERIFICATION: O YES C NO I A

REVIEWEO BY: DAT :.: 1 REVIEW METHOD: COMMENTS (C, NC cr Cl):  ;

- l

! APPROVED BY , DATE: l l

m .

o .-

i l I

l 3

l

Edibit D

+ NEP-17. 02 Revision 4 1

. . COMMONWEALTH EDISON COMPANY f

CALCULATION TABLE OF CONTENTS PROJECT NO. 9050-63 l CALCULATION NO. 5.2.2 BRW-97-0667 REV. NO. O PAGE NO. 3 l DESCRIPTION Unit 2 Tendon H4ED Broken Wires PAGE NO. SUB-PAGE N Tm E PAGE 1 REVISION

SUMMARY

2 3

TABLE OF CONTENTS 4

PURPOSE / OBJECTIVE METHODOLOGY / ACCEPTANCE CRITERIA 4 ASSUMPTIONS l

.i REFERENCES / DESIGN INPUT 4 P

CALCULATIONS S l l

4

SUMMARY

AND CONCLUSIONS 6

ATTACHMENT "A" A y.Ag

[

ATTACHMENT "B" B1-82 'l

l ATTACHMENT "C- C1-02 I ., . .

.Eskibk E NIF-12-02

. Revision 4

. COMMONWEALTH EDISON COMPANY

1. < .

l CALCULATION NO. : 5.2.2-BRW-97-0667 PROJECT NO. 9050-83 PAGE NOI'4 l

1. PURPOSE / OBJECTIVE -

To evaivate tne effects of the Hoop Tendon H4ED broken / unseated wires on the l Braidwood Unit 2 Containment Post-TensionMg Sys:em and hence the load carrying I capacity of the containment structure.

The number of protrud!ng (unseated) wires at the shop end/D Buttress (Reference 2) and at the field end/E Buttress (Reference 3) of Tendon H4ED ir: creased during the i current, July 1997 inspection from the installed condition, as reported in NSCI NCR - 1

  1. 209 and Comed NCR #435 (Reference 1).  ;
11. METHODOLOGY / ACCEPTANCE CRITERIA

d 1

1. . The total number of defective wires in Tendon H4ED (Shop + Field Ends) will be evaluated against the defective wire tendon previously evaluated in Reference 1
1(f). )
2. Critical hoop reinforcing steel stress, considering two (2) adjacent tendons will l be evaluated for the increased unseated wires based on Calculation 5.2.2.9,  :

pages 120 and 121 (Reference 4) j

. 111. ASSUMPJ]Qtgi -

, 1 None .

i IV. REFERENCESIDESIGN INPUT:

1. Historical data on (BRW) Unit 2 Tendon H4ED, transmitted by Tim Johnson,
Comed Braidwood Station, July 2,1997 containing the following (Attachment A)
l a)' Anchorage inspection Sheet, PSC Procedure SQ 8.0 for shop and 1 b) Original Gtressing Card c) NSCI NCR #209 d) Closure of Comed NCR #435 l e) NCR #435 l f) S&L Evaluation Letter to Comed for NCRs L-403, L-421, Lnd L-435, i April 28,1983 i i
2. NC/CA Report for Tendon H4ED, Shop End/D Buttress, dated 7-3-97
(Attachmont B) l

~

l REVISION NO.: 0 ,

l!

. . ._ _ _ _ _ _ _ _ _ = _ _ _ _ . _ . - _ _ _ _ _ _ _ _ _ _ _ _ _ _ . .

uy* ,

r wwe g 4 r NEP-12 02

- Revisies 4 COMMONWEALTH EDISON COMPANY l CALCULATION NO. : 5.2.2.BRW 97-0667 ' PROJECT NO. 9050 43 _ PAGE NO. 5 l

. 3. NC/CA Report for endon H4ED, Field End/E Buttress, dated 7-8 97 ,

. (Attachment C) ~

4 Byron /Braidwood Calculation No. 5.2.2, Section 9, pages 108A, Rev. 8 and 109 thru 123, Rev. 7. Ext:ess% Defective Wires in Tendons (NCR L-403, L-421, .

. and L-435)

V. GALCULATION:

1. Cefective wires at installation per original strassing card, Reference 1(b) and j

' NCR #435, Reference 1(e) for Tendon H4ED.  !

ShopEnd 8 . (4 Broken,4 Unseated)  :

b FieldEnd 7 (3 Broken,4 Unseated)  !

~

l Total 1,5

' ,l

'e Defective Wires as of 7-1-97 and 7-8-97 Inspections:

ShopEnd it (unsestadwires). Reference 2 (8 unseated,1 missing buttonhead)-Reference 3  !

FieldEnd 9

- 1 CurrentTotal 2_Q

, -)

  • 1983 Evaluatien for Tendon 51FE (NCR # L-403) in Reference 1(f) J Number Of Defective Wires Found,Accentable = 22 > 20 for H4ED

..200efediveWireCondition Fo rH4ED is Acceptable 1

(If Concrate Rein *orcing Steel Stress isMhin Allowables Per Step 2.) )

i

2. Critical Rebar Stress I Critical Hoop Reba Stress at 20 Ft. above basemat is due to average pre-stressing force on containment concrete section considering ad cent hoop  !

tendon ringo MS (Reference 4, page 121).

Increase in o3fec6ves wires for H4ED = 20 - if = 5 -

AverageDecrease in Prestress = T (6s (901.69 170 15i-

= 4.85 k  ;

~

= 4.05 /1.375'(Effective Tendon Spacing} K /F !

= 3.53K /IT

= 4 K /Ft, Conservative l REVISION NO.: 0 l

" b

. Exhibit E -

NEP-12 02

- Revision 4 I

~

COMMONWEALTH EDISON COMPANY -

. l CALCULA110N NO. : 5.2.2-BRW 97 0667 PROJECT NO. 9050 43 PAGE NO. 61Finall

. I This decrease in prostress shall be compensated by an incrnase in rebar strast, under desige loads.

Hoop Reinbreement, A3 =2.54tn* /Ft ,

1 tJncreastsinHoopRebarStressa4k/2.54 =138ksi I

Design MaximumRebarStress =46.29 ksi l Net Rebor Stems = 46.29 + 1.54 = 47.87 ksi < 54 ksi(Fs) l

/. Defective Wiius in Tendon H4ED Do Not Cause Oversgss in the Re!nforting Steet y

VI. EMMMARY AND CpNCLUSION Based on the evaluation, the 1983 Evaluation / Disposition of NCRs in Reference 1 (f) is ,

still valid. The defective wire condition noted on the shop and field end anchor heads l of Tendon H4ED is acceptable and no further corrective action is required. However, it 1 is recommended that continuity tests be performed on the protruding wires and the actual condition of the wires (protruding, broken, missing buttonheads, etc.) be )

recorded.

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4 SAJtemtT & Lt.Muy PROMCT No. toe-U MGMMS cat.C. No.k2 2.RN.J1.p-47 i

. . neumoso ... 1 su cut ue .oc ones, REY. O . DATr l

.cmen o, w uois o. PAGF A 3 Of c:::: ....sooo l TWM 9tO.t t r e t GO P April 28, 1983 l

- Project No. 4684 I S'ile 1.1/5.14.6 I

Commonwealth Edison Company Braidwood Station - Unit 2 .

Commonwealth Edison Company Nonconformance Reports L-403, L-421 & L-435 tfperification L-2722 I

' l I

f Mr. J. T. Westermoier Cowaanwealth Edisch Company ,

I 35 FN West First National Bank Building i Dear Mr. Westermeiegs ]

As you requested we have reviewed Commonwealth Edison Company Nonconformance Reports L-403, L-421 and L-435 for Braidwood Unit 2. These nonconformances concern defective wirma in tendons which exceeded the limits given in Specification L-2722. The

. specification allows three broken and/or unscated wires for each i individual tendon and 24 defective wires for 10 consecutive ten-dons.

Nonconformance Report L-403 is the worse case covered in these  !

three nonconformance reports wherein 22 defective wires exist a. i in tendon 51FE. We have performed a re-analysis of the contain- -I ment considering adjacent tendons and actual initial tenden forces. , g9 l

. We have found that the defective wires do not cause an overstress . *1 l in the hoop reinforcing steel. However, the defective wires

' reduce the ultimate capacity of the containment structuro by

/,'-

approximately 1 to 24. We consider this to be a significant -

l reduction. -

Ja.. l

.,5 ** J , ' l The non-defectis a wires in these tendons were stressed b 2 yond sl l the a.pecified ACI 313 allowablear 0.8 rpu at overstress and 0.7 -

Ppu at release, due to the presence of defective wires. At the -

overseress level the non-defective wires of tene]cn 51FE were -

strensed to about 900 of their ultimate tensile strength. The .

crerstaesa force is the largest force that will be applied to the tendon under the design loads 'Due to the fact that the tendon reeisted this force at stressing without exceeding allow- ...

. .able elongation, we believe the non-defective wires have not been

' damaged. .

1 .

e CAmotNT oa.uNcy anonnaenu kermweg A. -

>-' ""**** PRO.'ECT No. N S~D- 63 April 28, 1983 CALC floft.2 8m17 o L.

Conraonwealth Edison company

. , Mr. J T. Westermeier '

. Pnge 2 REY. O DATr ,,,

PAcr 49 .0FFI94't.

nased upon this review, no.further corrective action is required and the tendons with defective wires are considered acceptable.

Year v ry t u y, -

i' R.. Netzel sen or stru ,. ural Proj ect . Engl.neer  ;

j RJN:kv -l Enclosure - All Recipients  :

Copies:- )

n. Casato  :

T. R. Scenarfield l D. L. Leone /W. C..Cleff I 1

E. G. Tersce j M. Camba i i R. Hooks /D. C. Patel.

8. Puttaan
.T. J. Ryan/G. Willt.an a ,

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. MONCONFQEM&MCE/CCREECT:'/E AC"ON EEFCE: FCEE PSC s-c

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Any nonconforsins t hem to be venait ed chall have an aweroved repair trocedure.

i '~CORREC;;VF. ACTION TO PRE"/E.NT RECJ13DCE: m = _,,a ~ n.aw i .

Titledepe r.- 7 :::'

D ate %.p- p f' TnitIat er . Da an.s3Mir.m., __ NO - If yes, reger q u sect.:cn 4 C;;.terts IT.

l SIGNIFICANT CONDITION: ]TE3 l- Arr1oviL ccxusr:s:

4

.I

@ No h88" Ragineering b i PSC gym

[~A * /*Mm~ .

y Jg a 6 ,,,o g, 2nww JenmJent M

      • ~ M'M sza, s a,.,g 1-3 -7 ~? a. r. s-17 .

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Ctel11/ AGENT APPERFAta Enginser O no l REQUIEFlD > Date . Date _

C olGGAT32 ,

E,

, g _.

-s -'

W\- '

DISTRIBUTICN .

DUFosIIIc3 Ccurr.ETED sisned

]VicePresident .Ovaa. tor -

j Q QA Sectica -

Qt sestion cont.r. Ngat.,

~

g g,w Aur" 21 Date tie *

._,. -.,,,,.,,=

ktastneerist t Cuner/ Agent r __ 1 si w v. ..-.. w r w ,,,,, -. -

PSC PROCEDURE SQ 6.0

, , AMCHORAGE INSPECTION QwgJT $

DATA SHEET 8.0

. . JtlNE 19, 1992 PROJECT NdN~O ,

Page 1 of 1 CALC, nam 22 8#MT p67

f. *
  • i Revision 0 REV O DATF PAGE.fal._OFFA ANCMORACE INsPECTIcg DOCN90W 9ECRC: hums.,a* << '<*ALgg&;: G- / 99 'T ttAn jppy
tgycog 30. N4/J'27 TENDOW LND/80T21ES
NO. TAW' ,//7 mm- UgIT 2 (8,3,S) ,ANWORMEAD I,D. ,,[>M V RU5 KING I.D. _ T'P# /ar" ghnhff 4

(8.1) gggpyrcN TN3P?CTION (For Cerrosten Lavsis & Condition refer to Proc.sq 8.1) m ., p ,

(s.1.1) autteabasti . condition _ # _ wr_

(3.1.2) Anchorage Essd L'aval 1 (4.2) Cracks (8.1.2) 3pshi.sg Lavel , J. (3.1) Cracks er (8.1.;t) 'Shias Laval / _ (8.2) Crseks war (8,1,2) Bear!.n6 Plate Leve.1,,,, J (8.2) Cracks ms ' _ .

a ,.f. f y SQ 10.1.(8.1.2) Cuating - Complets g Incomplets d Lath. of Air Pocket 4 m7#pp 4'

SQ 10.1 (8.2.1) Wirs - Conditi.on gp Centing Complete g/cIncomplate g p., y

"~

ca.3) nmemin rwarreav_ pf (8.3.4) EntcNHtAD DAQ ntuonst===-a=oved Removed for Testir.s

/ OO O.O O O 0 0000O00O \

- Pr==*iatetr missins / 0000OOO00OO \

000000000000 OOOOOOOOOOOOQA, iW_ =

hl",I"nNUnsg of1,u.malz d)

O.O O O O00 gave_o o a '

. . suoun. Coa i:M*f.Monh.,20

\

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M33.f y ;

Z = Intersecting Cracks /*'

(W.3.5) Loca",e Anchorage k au-n og, l

n o t cod. on sk.tca ogOco go ,

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Z = ,,,g/g',

p"M-77a$.' N yg Gp (8.3.7.2) Butterheads Found -/4 jf tap w-ry:

Q w.97

--M (s.3.7.3) Total Effectiva DE M"4 ___

42.A-9 1 (8. 6.1) Protruding BH j,4,,,, Hisiing BH _f, ~~Yetai LH O ,~ 'dE2 W) 8,4.1.2.1) CantLymity Test Required ,,,$r1,, Wires %dentified/F.arked IE'5' en7

((8.5.1) SHIM GAP 5: ASJOUND /f r* g n g , g M nt Linn A LJ.FT _M4 (9.0) Reporting: Accept hitinacenpAsblehEn5 neer i Eotified WCR Wo./antal/Nad dr.-es.fr

, u- _

Laval Da.ta Q.C. Review

  • l

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Titis . _____ ,

I

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NONCCNFotgA38CE/CCERECTIYF ACTICN EEFCEI TCFM PSC  % <

  • Can==m.

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GOLD ggg go, y/f MC/CA No.fs'G?b//~AW" . . _ . ,,

c.

l ONCONICEKANCE: h Pf8,)% snuff.M T U ~ %w. % mfd &a 4 pair- l

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i PROJECT No 9eSU-63

@NO-Ifyes, describe: //ww CALC. No.GB-8tM7-o6h]

AFPARENT CAUSE KNow YES

'

  • ntV o _ nATF I raw wn yy I' ,

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  • ]

2 REcc3OLENDED COEEECTr/E ACTION: / L m e O + n M Yt w 's si e m or o d i / .

I 1

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- _ _ - - - - ~ - - - - - - - - - - - - - - - _

Any nonconforsinst (tes to be roostred shan have an mooroved recair oracedure.

CORRECTIVE ACTION TO PREVENT RECURRENCE: Ls//w a nnmu kn 1,ow,uwn?* l l

I('

l

=,zc 'Date M 97 int histoe %cs h54uss Title Jae> # 7

  • l 'S~.?WIFICANT CONDIIICN ]YE3 gNO-Ifyes,referQAM3ection4 Criteria 17.

ArcaovAL c:nnants:

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Engineering l 'PSC e [E'[M '

QA /, h

/lhe Save duswe, Jil++ Jrer m *

  • av<a.ams ARnec97 APPR07A1.  ?' T- 77 / Af7 EIcu & DATE --

Engineer qa OWNta/ AGENT APPROYAL i mEquzano Orss Owo-3 Data . Date CcanfENT3: --

t ~

i 4.,4 2 DISTRI3tl. ION. ,

  • DISPOSITICII C03 Pf.ETED j j"#K QA Section SVice President .Oveadar --

sis ==4 QE 3.4shion [Contr.Mgint. _fre_)fu' . Title '

ll Date - -

($agineerin$ p er/Agnat _

. . _ . _ _ _ . _ - _._ _ _ _. _._ _.____ ~._.___ __..._ __

~"

4 .

PSC PROCEDURE SQ 8.0 AWCHORAGE fMSPECTZON

OATA SHEET 8.0 O W -) C. '

JUNE 19,1992  ;

PROJECT No,902-43 l

Page 1 of 1

}

Revision O CALC, Nof*2 2-Nd.97 66 4; REY. O DATF

}

5:

  • AMCMORAGE INSPECTICE DocUMENTATI0W .

PAGE C Z OF AJ4L.  ;

i.' PsoJrCT hw a n. , wsmo.~ r--*-- .. /# >- ygga p f Mr*YF005'6 y 9'f e /

~

} Tzwoor 30. EfB TENDCN END/ BUTTRESS 30. h[Empr- gagg._JL

$ (8.3.3),ASCHOEHEAD I.D. 7dX .1 BUSMINC I.D. e/4- g (8.1) COR,RCSIQW TNSPECTION (For Corrosion Levels & Condition rafar to Proa.3Q 8.1) l (8.1.1) Buttenheads . Condition J p.y p.77

$ (8.1.2) Anshorage Head Level J (8.2) craaks -w i (8.1.2) 5 98== Level # (8.2) cracks a j

g (9) 1.2)

  • Shims Level .A (8.2) Cracks M (8.2) Cracks .** *er" 3.>p f7 P 8 Level /

l j:s(g.1.2)EsaringPlats 10.1.(8.1.2) Coating - Complate IncompletedLath, of Air Pocket m1,um,y-Jftp7

~

SQ 10.1 (8.2.1) Wire - Condition Coating ComplategIncompleta'd' my p fr l (8.) .mennran1meCTIon u

(8.3. A) . pVTTQEHEalLDATA /

. Discontinuous-Samoved /-

l Removed for Testing '

\ 4

- Pr.viou.ir ut== int OO OoOOO OOO O N  !

1

- g ",d t ,1,,

us'O O O O Q4in O OO O O Q..ar-i . oefoi .(m.tfor d)

T.)00 O 00 OO OO wT)o e i k

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- st = tins Cr.a

\ QgOOOOOOO90 W j.

r x-gaanc;.org.gq,.v,.

>==2 sta 1

oOOoosOoOO

- - - - - ~ , _O ,

4~ x . Int.r. tin. crea ( 1 i mwe (3.3.5) Locate Anchorage \

na" cad * = ***ta OOOOO0000 0 0 ,.,, / " ' "  ;

(8.3.83 oef.t.. Totat, i OOOO0000OOOO n.d \ OOOOOO O GLO OO OOOOOOO A- 4 N 0000 000g y

""g -

m (8.3.7.2 (8.3.7.3) Total Effective BH da Found A vd.ad./

- / a

[EJM  !

  1. Total 88 _f _,

(8. A.1) Protruding 3R ,,,J,,,,, MifEWilI ,,,f 8.4.1.2.1) continuity Test teguired .yE[,, Wires Identified /Macked W 8##)

! ((8.5.1) SHIM GAPS: AS_FOUND JA  %. Mn- Thread 7aint fAne

,E LEFT 3.C (s.o) RaPortinst L iesePt Qf: UnseesPtablebEnsineerBotified.BCEE0.

.g' q.C. Review' Level Date Title' .

    • TOTAL PfE 05 **

_ . . _ _ , _ . . _ ,-

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