ML20236W623
| ML20236W623 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 11/24/1987 |
| From: | NUTECH ENGINEERS, INC. |
| To: | |
| Shared Package | |
| ML20236W497 | List: |
| References | |
| NUDOCS 8712080112 | |
| Download: ML20236W623 (14) | |
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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-
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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-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) -
I u
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)
- q y
-02BS-SS 02BS-S9
.y
- l Deadweight Stress (DW)-
199 psi.
88 pai
)
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 data.
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nutech I
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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.))
j (ai = d/(tp + to))
Length 360' degrees 360 degrees-1 l
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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'-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%-
J
,d 1
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- 1 Page 6 of 11
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nutech a
1 (QCINRCRR.WK1) i NRC / CECO / NUTECH Conference Call i
Quad Cities Unit 1 1987 Outage November 24, 1987 I
INSIDE WALL OUTSIDE WALL
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50 o GE 26 l
40%
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F a ANL 26 (2 ozimuths) j 30 o
o ANL 26(IN-SERVICE FROM KRB)
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-400 0.2 0.4 0.6 '
0.B 1.0 -
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Figure 1 i
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.
..)
.]
- 2. USNRC'NUREG-0313, " Technical. Report on:
Material. Selection'and Processing Guidelines for BWR Coolant Pressure Boundary Piping",,
Draft Revision 2..
l H
- 3. ASME Section III, 1983 Edition withLLatest-d Addenda.
j Crack Lengths & Flaw Depth Ratios:
)
'02BS-S9 1
Initial Crack Length (Li) -
Upstream-9" 11"
}l Downstream 12.~25" Initial Crack Depth -
(% thru-wall x pipe i
wall thickness)
Upstream 0.31" O.488" Downstream o
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?
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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-SS 02BS-S9 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 steel at 575 degress F -
e SM = 16,950 poi (perfASME Section III).
Ctress Ratios (SR) -
i 02BS-SS 02BS-S9-l
___a_______
NUREG-0313 0.49 0.43,
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i Page 9 of 11
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(QC1NRCRR.WK1)'
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
'.14' Downstream-0' Combined.
H/A 0.26'-
End-of-Evaluation Period Flaw' Length Ratiosi (af/ai)*(Li./ (PI
- 0.D.)):
- 02BS-S9 Upstream 0.22 0.17 Downstream 0.18 j
u i
Combined N/A 10.35' i
l Allowable Flaw Depth Ratio:
~d i
'02BG-S5-02BS-891 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.
j.
performed due to geometry.
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Page 10 of 11 l
110 tech i
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(QCINRCRR.WK1)
,j NRC / CECO / NUTECH Conference Call i
Quad Cities Unit 1 1987 Outage l
November 24,.1987 j
l l
Wes TABLE iWS 36415 -
ALLOWABLE END-OF-EVALUATION PERIOD FLAW,
- DEPTH 1 TO THICKNESS RATIO FOR CIRCUMFERENTIAL FLAWS IN SHIELDED METAL. :
.)
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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ATTACHMENT C i
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