ML20236W623

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Revised Interim Fracture Mechanics Analysis,Welds 02BS-S5 & 02BS-S9
ML20236W623
Person / Time
Site: Quad Cities Constellation icon.png
Issue date: 11/24/1987
From:
NUTECH ENGINEERS, INC.
To:
Shared Package
ML20236W497 List:
References
NUDOCS 8712080112
Download: ML20236W623 (14)
v • d • e


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1 NRC / CECO / NUTECH Conference, Call Quad Cities: Unit 111987 Outage November.. 2 4 ,. 1 9 8 7.'-

REVISED; INTERIM' FRACTURE MECHANICS ANALYSIS-

. WELDS 02BS-SS:& 02BS-S9.

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NRC /-CECO } NOTECH Conference. Call:

Quad Cities, Unit 1 1987' Outage:

November-24;;.1987' FLAW. LOCATION, MAP-l' .:

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NRC / CECO-/ NUTECH Conference Call!

Quad' Cities. Unit. 111987. Outage

-November?24,_1987-WELD GEOMETRY.

02BS-SS. -02BS-89^

Pipe Geometry:

Outside DiameterL(0 D.)' 28" 28"'

Wall Thickness (tp)  :

Upstream 1.24" 1.22"'

Downstream (1) 1.325" l Weld Overla~y Repair Thickness (to) -

Upstream. 0.231*' .

_. 0117 2" .( 2 );

Downstream- (1) ,0.143" (2)- .

Total Thickness'(tp + to) - .

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Upstream. 1.471"- 1.392" Downstream. (1), 1.468"-

Notes: ,

1. Pipe wall thickness on tee side of weld::not taken due to geometry.
2. Final weld overlay repair thickness not available at this time. Final 1 overlay thicknesaLestimated  :
rom current pre-surface finishing
thickness.

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NRC / CECO / NUTECH Conference Call Quad: Cities Unit 1'1987 Outage i November 24,~1987 APPLIED STRESSES (1) ,

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-02BS-SS 02BS-S9 y

Deadweight Stress (DW)- 199 psi. 88 pai :l )

Internal Pressure Stress (P) 5,949 pai 6,287fpsi OBE Seismic Stress (OBE) 448 pai 125 pai:

3, -

~ Differential' Thermal 3,296 psi 660-psi.

Expansion Stress (TE)

Held Overlay Shr.inkage 489 psi ;612l psi j Stress (WOS).(2) 1 i

Notes:

1. Applied stresses based upon thinner of. upstream or downstream component.
2. Complete weld overlay shrinkage data is'not1 available at this time. Weld' overlay shrinkage. ,

stress estimated based upon' 1984/1987 chrinkage .j data.

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NRC / CECO /."NUTECH2ConferencelCall Quad Cities-Unit 1.1987EOutage'

. November: 24,:;1987-CRACK GROWTH ANALYSIS Analytical Tool: NUTECH Computer. Program NUTCRAK, Version 2.0.2 IGSCC Crack Growth' Correlation:

da/dt : -(3.59 E-8)*(K**2.161)-

where:

da = differential crack size-(inch'es)1 dt = differential time-(hours)

K = stress intensity . factor -(ksi-Qin'.')'

Intial Flaw Size:

02BS-SS- 02BS-S9~

Depth (% Original Pipe- 25% 44% 1 Wall Thk.)(See Page 1) l Depth (d'= %

  • tp)- 0.31" 0.54" .

Depth (% (Pipe. Wall + 21% 39% 1 Overlay Thk.))

(ai = d/(tp + to))

j Length 360' degrees 360 degrees-

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NRC-/. CECO / NUTECH Conference: Call Quad Cities. Unit 1'.198710utage; November 24 ,1987

-CRACKLGROWTH. ANALYSIS;

-(Concluded).

' Applied Stress Load Combinations':

02BS-SS: 02BS'-S9-DW +'P + TE +LWOS.- :9,933 psi . 7., 6 4 7. p s i Residual Stresses':

l l NRC Document NUREG-0313, l Draft Revision 2 (Figure 11)-

l Predicted End-of-Evaluation' Period-(18-months) Crack ~

Depths ~(af):

l 02BS-SS 02BS-S9 af - -46% 51%-

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1 (QCINRCRR.WK1) i NRC / CECO / NUTECH Conference Call i Quad Cities Unit 1 1987 Outage  ;

November 24, 1987 I INSIDE WALL OUTSIDE WALL .)

50  ;  ;  ;  ;  ;  ; i 3 l J o GE 26 l 40 -

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Figure 1 DRAFT NUREG-0313 THROUGH-WALL RESIDUAL STRESS DISTRIBUTION Page 7 of 11 nutech 1

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NRC / CECO / NUTECH-Conference. Call-

Quad Cities' Unit 1'1987. Outage November:24,11987<

CRACK 1 GROWTH EVALUATIONS i d

Governing / Applicable Documents: '#

1. ASME Section XI,-1983 Edition-with Addenda j through Winter 1985. ..)

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2. USNRC'NUREG-0313, " Technical. Report on:  !

Material. Selection'and Processing Guidelines for BWR Coolant Pressure Boundary Piping",, -

l Draft Revision 2..

H

3. ASME Section III, 1983 Edition withLLatest- d Addenda. j Crack Lengths & Flaw Depth Ratios:

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02BS-S5 '02BS-S9

___________ ___________ 1 Initial Crack Length (Li) -

Upstream- 9" 11"  !

Downstream

  • 12.~25" }l Initial Crack Depth -

(% thru-wall x pipe i wall thickness)

Upstream 0.31" O.488" o

Downstream

  • 0.583" ,

Initial Flaw Length-to-Depth Ratio -

F l Upstream 29.0 '22.5. i l

Downstream

  • 21.0 l

Therefore.-crack does not change shape.during.  ?

evaluation period.

l

  • UT examination on tee side of we]d can not be performed due to geometry.

Page 8 of 11 nutech? o

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URC-/ CECoI/'NUTECH' Conference Call' Quad Cities Unit 1.1987 Outage November 24, 1987-

. CRACK ~ GROWTH EVALUATION (Continued)

Applied Stress Load Combinations-(LC):

02BS-S9

__'02BS-SS NUREG-0313 7,962. psi 6 959Lpai (DW + P + OBE +

(TE + WOS)/2.77)

SMAW Stress' Ratio Penalty Factor (M):

From ASME Section XI Table:IWB-3641-5 (Page?11)1-M: 1.0 + 0.01(0.D. - 24)

M = 1.04 Allowable Design Stress Intensity (SM):

i For 304 stainl'ss e steel at 575 degress F -

SM = 16,950 poi (perfASME  !

Section III).

Ctress Ratios (SR) - .

i 02BS-SS 02BS-S9- l

___________ ___a_______ >

NUREG-0313 0.49 0.43 ,  ;

(M * (LC / SM) i

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NRC./ CECO./ NUTECH ConferenceTCall' Quad Cities Unit.1 1987LOutage.

. November 3 24,_1987 CRACK GROWTH' EVALUATION-(Concluded).

Initial Flaw Length Ratios (lie /.(PI

  • 0.D;)):- ,

02BS-SS- 02BS-S9 Upstream. 0.10- 0.13 '

Downstream- * '.14' 0'

Combined. H/A 0.26'-

End-of-Evaluation Period Flaw' Length Ratiosi (af/ai)*(Li./ (PI

  • 0.D.)):

02BS-S5 - 02BS-S9 Upstream 0.22 0.17 Downstream

  • 0.18 j u

i Combined N/A 10.35' i l

Allowable Flaw Depth Ratio: -

i

'02BG-S5- 02BS-891 ~d NUREG-0313 - 0.60- 0;80' '

(ASME Sect XI Table IWB-3641-5)(Page 11)-  !

Conclusion:

I Tak11:g credit for the lo6d carrying capacity l of the overlay repair, but not taking credit: i for residual stress improvement,- Welds 02BS-S5i and 02BS 89 meet the requirements of: draft' NUREG-0313 for at least one. additional' fuel.

cycle of operation.

  • UT examination on tee side of weld can not be:
j. performed due to geometry.

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(QCINRCRR.WK1) ,j NRC / CECO / NUTECH Conference Call i Quad Cities Unit 1 1987 Outage November 24,.1987 l j

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Wes TABLE iWS 36415 -

ALLOWABLE END-OF-EVALUATION PERIOD FLAW,

- DEPTH 1 TO THICKNESS RATIO  ;

FOR CIRCUMFERENTIAL FLAWS IN SHIELDED METAL. : I ARC AND SUBMERGED ARC WELOS .)

NORMA.' OPERATING (INCLUDING UPSET AND TEST) CON 0(TIONS -

Ratio of Flow Lanoth, t,, to Pipe Carannferenes (Neee Oil Strees Ratio . 0.5 (Note (2)] 0.0 0.1 0.2 03 0.4 er Geester ,

1.05 (4) (4) (4) (4) (4) (C 1.00 0 to 0.25 0.16 0.15 (4) (4) 0.95 0.60 0.47 0.25 0.10 0.15 0.12 j 0.90 0.40 0.60 0.39 0.27 0.22 0.19 '

O.SS 0.60 0.60 0.51 0.M 0.29 0.25 0.00 0.60 0.60 0.60 0.49 0.M 0.30 3

0.75 0.60 0.60 0.60 0.92 0.45 0.35 1 0.70 0.60 0.60 0.60 0.60 0.51 0.41, O.6S 0.60 0.60 0.60 0.60 0.96 0.49 5 0.60 0.60 0.60 0.60 0.60 0.40 - 0.49 NOTES:

(1) Flaw depth = a,fer a surface flaw 2a.for a subourface flew i = nominalthicknees Lineer interpolation is pomeseitde.

(2) Stress ret;n = M(P.,+ P. + P/2.771/$.

)

whers  !

S. = allowable deelen stress intensity (in accordance with Sectlen III)

P. = primary lenytud6nel enembre.no stress (P. 5 0.55.)  ;

P = primary bending swees P, = expension stresers resulting from restraint of free end displacement l M = 1.0 for shleidad metal art weeds where 0.D. - 24 in.

= 1.0 + 0.01(0.0. 24) for shielded metal art weeds where 0.0. > 24 in.

- 1.00 for admorged are welds where 0.D. 5 24 In. ,

= 1.00 A 0.00*(0.fs. 141 for ssWW are weeds where 0.D. > 24 in.  !

(3) Cirewnference fasasd en evmenal pape diameter.

(4) IWB-3S14.3 sham he used.

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