ML20205Q398
| ML20205Q398 | |
| Person / Time | |
|---|---|
| Site: | Byron  |
| Issue date: | 03/31/1986 |
| From: | Bamford W, Lee Y, Palusamy S WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML20205Q374 | List: |
| References | |
| WCAP-11063, NUDOCS 8605280280 | |
| Download: ML20205Q398 (218) | |
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WESTINGHOUSE CLASS 3 CUSTOMER DESIGNATED DISTRIBUTION WCAP 11063 BACKGROUND AND TECHNICAL BASIS FOR THE HAND BOOK ON FLAW EVALUATION FOR BYRON UNITS 1 AND 2 STEAM GENERATORS AND PRESSUREIZERS March 1986 Y. S. Lee W. H. Bamford -
APPROVED: m-
/ Y
[S S[ Pal my, Manager Structural Materials Engineering Although information contained in this report is nonproprietary, no distribution shall be made outside Westinghouse or its licensees without the customer's approval.
WESTINGHOUSE ELECTRIC CORPORATION Nuclear Energy Systems P.O. Box 355 l Pittsburgh, Pennsylvania 15230 l
1451E:10/031986 0605280280 860521 PDR 0 ADOCK 05000455 PDR l
EXECUTIVE
SUMMARY
This report contains the background and technical basis for the handbook of flaw evaluation for Byron Units 1 and 2 steam generators and pressurizers.
The work is based on criteria via Section XI of the ASME Boiler and Pressure Vessel Code for assessing allowable flaw sizes for continued service without repair. The assessment capability is provided in the form of charts for selected regions of the steam generators and pressurizers. These are contained in the flaw evaluation handbook itself, Reference 2. For convienience these are also contained in Appendix A of this document. The o
evaluation charts are preceeded by a simple example demonstrating their use.
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TABLE OF CONTENTS SECTION TITLE PAGE 1 INTRODUCTION 1-1 1.1 Code Acceptance Criteria 1-2 1.1.1 Criteria Based on Flaw Size 1-3 1.1.2 Criteria Based on Stress Intensity Factor 1 -4 1.1.3 Primary Stress Limits 1-5 1.2 Geometry 1-5 1.3 Scope of This Work , 1-5 2 LOAD CONDITIONS, FRACTURE ANALYSIS METHODS AND MATERIAL 2-1 PROPERTIES 2.1 Transients for the Reactor Vessel 2-1 2.2 Stress Intensity Factor Calculations 2-1 2.3 Fracture Toughness 2-3 2.4 Critical Flaw Size Determination 2-B -
3 FATIGUE CRACK GROWTH 3-1 3.1 Analysis Methodology 3-1 3.2 Stress Intensity Factor Expressions 3-2 3.3 Crack Growth Rate Reference Curves 3-3 3.4 Fatigue Crack Growth Results 3-5 4 DETERMINATION OF LIMITING TRANSIENTS 4-1 5 SURFACE FLAW EVALUATION 5-1 5.1 Scope of Evaluation 5-1 5.2 Code Criteria 5-1 5.3 Longitudinal Flaws and Circumferential Flaws 5-2 5.4 Basic Data 5-3 5.4.1 Final Flaw Size a 5-3 f
5.4.2 Minimum Critical Flaw Size ac and/or a 3 5-4 v
1451E:10/031086
TABLE OF CONTENTS (cont'd)
SECTION TITLE PAGE 5.5 Typical Surf ace Flaw Evaluation Chart 5-4 5.6 Procedure for the Construction of Surface Flaw S-5 Evaluation Charts 6 EMBEDDED FLAW EVALUATION 6-1 6.1 Scope of Evaluation 6-1 6.2 Embedded vs.' Surface Flaws 6-1 6.3 Code Criteria 6-3 6.4 Basic Data 6-3 6.5 Fatigue Crack Growth for Embedded Flaws 6-5 6.6 Typical Embedded Flaw Evaluation Chart 6-7 6.7 Procedures for the Construction of Embedded Flaw 6-9 Evaluation Charts 6.8 Comparison of Embedded Flaw Charts with Acceptance 6-12 Standards of IWB-3511-1 7 REFERENCES A-1 APPENDIX A FLAW EVALUATION CHARTS A-1 A-1 Introduction to Evaluation Procedure A-2 Tube Sheet-Channel Head Junction of the A-11 Steam Generator (SGC-01)
A-3 Tubesheet-Stub Barrel Weld of the Steam A-25 Generator (SGC-02)
A-4 Feedwater Nczzle Region of the Steam A-33 Generator (SGN-02) vi 1451E:lD/031286
TABLE OF CONTENTS (cont'd)
SECTION TITLE PAGE A-5 Stub P,0.rrel Intermediate Seam Weld of the Steam A-46 Generator (SGC-03)
A-6 Lower Shell-Cone Weld of the Steam Generator A-56 (SGC-05)
A-7 Upper Shell Cone Weld of the Steam Generator A-71 (SGC-06)
A-8 Upper Shell-Dome Weld of the Steam Generator A-81 (SGC-08)
A-9 Lower Middle Shell Longitudinal Weld of the A-95 Pressurizer (PLO2)
A-10 Upper Middle Shell to Lower Middle Shell Weld A-106 (PC03) and Upper Shell to Upper Middle Shell Weld (PC04) of the Pressurizer APPENDIX B STRESS DISTRIBUTIONS FOR GOVERNING TRANSIENTS B-1 APPENDIX C FATIGUE CRACK GROWTH RESULTS C-1 APPENDIX 0 ALLOWABLE FLAW SIZE DETERMINATIONS D-1 i
vii 1451E:lD/031286 t_ . . . .-
ACKNOWLEDGEMENT 3 The fracture analysis work presented in this report was based on the stress analysis performed at the Westinghouse Tampa and Pensacola Plants as part of the design stress analysis for the Byron Steam Gerierators and Pressurizer.
The assistance of Susan Kron, Buddy Middlebrooks and their manager Don Green
.in collecting the detailed results of these analyses is much appreciated.
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ix 1451E:10/031086
_ _ _ _ _ . . _ . - _ - . _ _ _ , ~ _ _ _ ._ ___ _ _ _ _ .-
SECTION 1 INTRODUCTION This flaw
- evaluation handbook has been designed for the evaluation of indications which may be discovered during inservice inspection of the Byron Units 1 and 2 steam generators and pressurizer vessels. The tables and charts provided herein allow the evaluation of any indication discovered in the regions listed below without further f racture mechanics calculations. The fracture analysis work has instead been done in advance, and is documented in this report. Use of the handbook will allow the acceptability of much larger indications than would be allowable by only using the standard tables of Section XI (1). This report provides the background and technical basis for i
the handbook, which has been published under separate cover [2].
. The handbook has been developed for the following locations in the Byron steam generators and pressurizer (the geometry of each of these regions is shown in Figures 1-1 and 1-2):
4
- The steam generator
o Tubesheet to channel head weld region (weld seam SGC-01) o Tubesheet to stub barrel weld region (SGC-02) ,
o Stub barrel internediate seam (SGC-03) o Lower shell to cone weld region (SGC-05) o Upper shell to cone weld region (SGC-06) o Upper shell to dome weld region (SGC-08) o Feedwater nozzle to shell weld region (SGN-02)
The pressurizer:
o Upper shell to upper middle shell weld (seam PC04) o Upper middle shell to lower middle shell weld (PC03) o Lower middle shell longitudinal weld (PLO2)
- The use of the term " flaw" in this document should be taken to be synonymous with the term " indication" as used in Section XI of the ASME Code.
1451E:lD/031986 1 -1 4
i
The highlight of the handbook is the design of a series of flaw evaluation charts for both surface flaws and the embedded flaws. Since the characteristics of the two types of flaws are different, the evaluation charts
, are distinctively different in style. One section of this technical basis document deals with surface flaws at various locations, and another section concentrates on the evaluation of embedded flaws.
The flaw evaluation charts were designed based on the Section XI code criteria of acceptance for continued service without repair. Through use of the charts, a flaw can be evaluated by code criteria instantaneously, and no ,
follow-up hand calculation is required. Most important of all, no fracture mechanics knowledge is ne?ded by the user of the handbook charts.
- The evaluation charts constructed reveal a number of interesting points with regard to the Byron steam generator and pressurizer. The allowable flaw depths for embedded flaws are generally very large, with charts for most regions showing that any flaw which can be characterized as embedded will be acceptable. Allowable flaw depths for outside surface flaws in most regions are also very large.
It is important to note that indications which are large enough that they exceed the standards limits, and must be evaluated by fracture mechanics, will also require additional inservice inspection in the future, as discussed in Section XI, paragraph IWB 2420.
1.1 CODE ACCEPTANCE CRITERIA There are two alternative sets of flaw acceptance criteria for continued service without repair in paragraph IWB-3600 of ASME Code Section XI [1].
Namely, 1451E:10/031986 1-2
- l. Acceptance Criteria Based Cn Flaw Size (IWB-3611)
- 2. Acceptance Criteria Based on Stress Intensity Factor (IWB-3612)
Both criteria, in general, are comparable in accuracy for thick sections, and the acceptance criteria (2) have been assessed by past experience to be less restrictive for thin sections, and for outside surface flaws in many cases.
In all cases, the most beneficial criteria has been used. The criteria actually used for each region are listed in Table 1-1.
1.1.1 CRITERIA BASED ON FLAW SIZE The code acceptance criteria stated in IWB-3611 of Section XI are:
,, a f 5 .1 a For Normal Conditions
( (Upset & Test Conditions Inclusive) and a f 5 .5 a g For Faulted Conditions (Emergency Condition Inclusive) where a
f
= The maximum size to which the detected flaw is calculated to grow at the end of design life, or till the next inspection time.
a c
= The minimum critical flaw size under normal operating conditions (upset and test conditions inclusive) a 4
= The minimum critical flaw size for initiation of nonarresting growth under postulated faulted conditions. (emergency conditions inclusive) 1451E:10/031986 1-3
To determine whether a flaw is acceptable for continued service without repair, both criteria must be met simultaneously. However, both criteria have been considered in advance before the charts were constructed.Only the most restrictive results were used in these charts.
1.1.2 CRITERIA BASED ON STRESS INTENSITY FACTOR As mentioned in the preceeding paragraphs, these criteria are from IWB-3612 of Section XI.
The term stress intensity factor (Kg ) is defined as the driving force on a crack.
It is a function of the size of the crack and the applied stresses, as well as the overall geometry of the structure. In contrast, the fracture toughness (Kg ,, Kgc) is a measure of the resistance of the .
mater:al to propagation of a crack.
It is a material property, and a function of temperature.
The criteria are:
K K
g ~<b_ a For nomal conditions (upset & test conditions inclusive)
K K
g5(2 For faulted Conditions (emergency Conditions inclusive) where K =
g The maximum applied stress intensity factor for the flaw size a
f to which a detected flaw will grow, during the conditions under consideration, at the end of design life, or to the next inspection.
K,g
=
Fracture toughness based on crack arrest for the corresponding crack tip temperature.
K =
gg Fracture toughness based on fracture initiation for the corresponding crack tip temperature.
1451E:lD/031085 1-4
To determine whether a surface flaw is acceptable for continued service '
without repair, both criteria must be met simultaneously. .However, both I criteria have been considered in advance before the charts were constructed. ;
Only the most restrictive results were used in the charts.
1.1.3 PRIMARY STRESS LIMITS In addition to satisfying the f racture criteria, it is required that the primary stress limits of Section III, paragraph NB 3000 be satisfied. A local area reduction of the pressure retaining membrane must be used, equal to the area af the indication, and the stresses increased to reflect the smaller cross section. All the flaw acceptance tables provided in this handbook have included this consideration, as demonstrated herein. The allowable flaw .
' depths determined using this criterion have been summarized in Table 1-2 for each of the locations for which handbook charts have been constructed.
1.2 GEOMETRY '
The geometry of the steam generator and pressurizer units are shown in Figures 1-1 through 1-2.
The outside surfaces have been assumed to be insulated. The notation used for both surface and embedded flaws in this work is illustrated in Figure 1-3.
1.3 SCOPE OF THIS WORK The calculations for the construction of the flaw evaluation charts have been carried out to provide assessment for a range of flaw shapes. Separate charts were constructed for hydrostest and leak tests, and are presented as a function of temperature, since the severity of these tests can be easily controlled.
The fracture and f atigue crack growth evaluations carried out to develop the handbook charts have employed the recommended procedures and material properties for low alloy steels, as contained in Section XI, Appendix A.
Ther,efore, the charts apply primarily for those materials, 1451E:10/031086 1-5
TABLE 1-1 SumARY OF CRITERIA USED IN PREPARING THE HANDBOOK CHARTS Inside Surface Outside Surface Embedded REGION Flaw Charts Flaw Charts Flaw Charts Tubesheet to channel head weld region (SGC-01)
- 1. Circumferential flaw 1*, 2** -
2
- 2. Longitudinal flaw 1 -
2 Tubesheet to stub barrel weld region (SGC-02) 1, 2 -
2 Feedwater nozzle to shell weld region (SGN-02) 2 2 2 Stub barrel intermediate seam weld (SGC-03) 2 -
2 Lower shell to cone weld region (SGC-05) 2 -
2 Upper shell to cone weld region (SGC-06) 2 2 2 Upper shell to dome weld region (SGC-08) 2 2 2 I
Upper shell to upper middle shell weld (seam PC04) 2 -
2 Upper middle shell to lower middle shell weld (PC03) 2 -
2 Lower middle shell longitudinal weld (PLO2)
Covered case 1, 2 -
2 Uncovered case 1, 2 -
2
- Criteria on flaw size (IWB 3611)
- Criteria on K (IWB 3612) 1 I
TABLE 1-2
SUMMARY
0~ ALLOWABLE FLAW DEPTHS BASED ON PRIMARY STRESS LIMIT CRITERIA Region Allowable Flaw Depths Orientation of Flaw (a/t)
Tubesheet to Channel Head Weld 0.8 Circumferential Region (SGC-01) - Inside Surface 0.93 Longitudinal Flaw.
Tubesheet to Stub Barrel Weld 0.21 Circumferential Region (SGC-02) - Inside Surface Flaw.
Feedwater Nozzle to Shell Weld Region (SGN-02) - Inside Surface Flaw 0.73 Circumferential Outside Surface Flaw 0.46 Circumferential 1 Stub Barrel Intermediate Seam (SGC-03) - Inside Surface Flaw 0.67 Circumferential Lower Shell to Cone Weld Region (SGC-05) - Inside Surface Flaw 0.941 Circumferential Outside Surface Flaw 0.32 Circumferential Upper Shell to Cone Weld Region (SGC-06) - Inside Surface Flaw SINCE THE PRIMARY STRESS IS COMPRESSIVE, THE CRITICAL FLAW SIZE IS NON-EXISTENT T e e
TABLE 1-2'(continued) Region Allowable Flaw Depth (a/t). Uppershell to Dome Weld Region Circumferential (SGC-08) - Inside Surface Flaw 0.86
- Outside Surface Flaw 0.55- Circumferential Pressurizer Uppershell to Upper' Middle Shell Weld (PC04) and Upper Middle Shell to Lower Middle Shell Weld (PC03) - Inside Surface Flaw 0.39 Circumferential Lower Middle Shell Longitudinal
, Weld (PLO2) - Inside Surface Flaw 0.39 Longitudinal ! i' i i l l i w_.
N/ f' Uppershell-dome (SGC-08) O O O - Upper shell-cone (SGC-06) Lower shell-cone (SGC-05) Stub barrel intemediate seam (SGC-03) Feedwater no::le-shell (SGN-02) ( l Tuberreet-stub barrel (5G0-02) l Tubes .eet-channel head (SGC-01) a-Figure 1-1 Schematic of Byron Ur.it 2 Mo:el D-5 5 tear. Gererator 1-9
a y Upper Head to
' Upper Shell Weld D
x pg,, Upper Shell to Upper Middle Shell Weld I c rces Upper Middle Shell to Lower Middle Shell Weld Lower Middle Shell ptez Longitudinal Weld c.
"** Lower Middle Shell to Lower Shell Weld A
r . Lower Shell to i r f/ "' ' ' Bottom Head Weld Figure 1-2 Schematic of Byron Unit 20-84 Pressurizer i 1-10 d
Figure 1-3 Typical Notations of Surface and Embedded Flaw Indications s' IN'*b).$, ". ' T w' cal I W I le. Indic a t io., i Wall Ihltlness,t til TNctesa Nw- .. 3 b i
*7 (VT 4 ._ Lt A. - -- - \)_l s- .
,rI Surface (Clad-BaseMetal Interface for Indications
,/
Near Inside Surface). m ,
" Nl Surface (Ciad-Base Metal Interface for Indications Near Inside Surface).
e
SECTION 2 LOADING CONDITIONS. FRACTURE ANALYSIS METHODS AND MATERIAL PROPERTIES 2.1 TRANSIENTS FOR THE STEAM GENERATOR AND PRESSURIZER The design transients for the Byron steam generators and pressurizers are listed in Tables 2-1 and 2-2. Both the minimum critical flaw sizes, (a c under normal operating conditions, or a under j faulted conditions) and K g are functions of the stresses at the cross-section where the flaw of interest is located, along with the material properties. Therefore, the first step for the evaluation of a flaw indication is to determine the appropriate limiting load conditions for the location of interest. The selection of the most limiting transient for normal / upset / test conditions was straightforward. The transient with the highest surface stress in the area where the flaw was postulated was chosen as the worst case. Note that this can result in a dif ferent limiting transient for an inside flaw as
~
opposed to an outside flaw, as may be seen in the detailed treatments of the in'dividual locations. The governing transient for cach region is listed in the tables of Appendix D where the limiting flaw sizes are also provided. The transients listed in these tables are the governing ones for the region involved, regardless of the criterion used to construct the flaw evaluation charts, [either the criteria on flaw size (Section 1.1.1) or on applied K y (Section 1.1.2)]. 2.2 STRESS ANALYSIS AND STRESS INTENSITY FACTOR CALCULATIONS The stress analyses for the Byron steam generators and pressurizer vessels were carried out using a general purpose finite element program (WECAN). These analyses considered all the normal upset and test conditions, and the governing emergency and faulted conditions, and were carried out in support of the design stress analysis required of ASME Class 1 vessels. The stress distributions for the governing transients in each region are tabulated in Appendix B. 1451E:lD/032086 2-1
One of the key elements @f the allowable flaw size calculations is the determination of the driving force or stress intensity f actor (K y ). This was done for each of the regions using expressions available from the literature. In all cases the stress intensity f actor for the allowable flaw size calculations utilized a representation of the actual stress profile rather than a linearization. This was necessary to provide the most accurate determination possible of the critical flaw size, and is particularly important for consideration of emergency and faulted conditions, where the stress profile is generally nonlinear and often very steep. The stress profile was represented by a cubic polynomial: 2 3
+A o(x) = A0 + ^1 +A2() 3 I) where x = the coordinate distance into the wall t = wall thickness o = stress perpendicular to the plane of the crack For the surface flaw with length six times its depth, the stress intensity f actor expression of McGowan and Raymund [3] was used.
The stress intensity factor K7 (4) can be calculated anywhere along the crack front. The point of maximum crack depth is represented by 4 = 0. The following expression is used for calculating Ki (4). 2 K;(4) = (cos 4 + sin 2) (A0 "0 + A) H) c
+
t A2 "2 + t A3 "3) The magnification factors H ' 0 "l' "2 aM H3 an a funcdon of 4 aM are obtained by the procedure outlined in Reference [3]. For the semi-circular surf ace flaw the stress intensity f actor calculation was carried out using the expressions developed by Raju and Newman [4]. Whereas for the 6:1 flaw McGovern and Raymond expression was used. 1451E:10/032086 2-2 l
The stress intensity factor expression used for a continuous surface flaw was that developed by Buchalet and Bamford [5]. Again the stress profile is represented as a cubic polynomial, as shown above, and these coefficients as well as the magnification factors are combined in the expression for K y K g = /d [A 0 F) + Aj F2* A2 F3+ a A3 F] 4 where F),2 F,F' 3 4 are magnWcadon factors, avaHaMe in W. The stress intensity factor calculation for an embedded flaw was taken from work by Shah and Kobayashi [6] which is applicable to an embedded flaw in an infinite medium, subjected to an arbitrary stress profile. This expression has been shown to be applicable to embedded flaws in a thick-walled pressure ' vessel in a recent paper by Lee and Bamford [7]. 2.3 FRACTURE TOUGHNESS The other key element in the determination of critical flaw sizes is the f racture toughness of the material. The fracture toughness has been taken directly from the reference curves of Appendix A, Section XI. In the transition teniperature region, these curves can be represented by the following equations: K = 1c
+ .806 exp. [0.02 ( bRINDT
- Kg , = 26.8 + 1.233 exp. [0.0145 (T-RTNOT + 1609]
where K g and K g are in ksi/in. The upper shelf temperature regime requires utilization of a shelf toughness which is not specified in the ASME Code. A value of 200 ksi/in has been used here. This value is consistent with general practice in such evaluations, as shown for example in reference [8), which provides the background and technical basis of Appendix A of Section XI. 1451E:10/031986 2 -3
The other key element in the determination of the f racture toughness is the value of RTNDT, which is a parameter determined f rom Charpy V-notch and drop-weight tests. Information for material chemistry and initial RTNDT was determined from the vendors material certification reports. When no information on the chemistry or RT was avaHaMe, consename NOT assumptions were made. The limiting material properties for the steam generators and pressurizers were used in the analyses here. For the steam generators, RT equal to 40*F for the base metal, and 10*F for the welds, NDT while for the pressurizer RT equal to 60*F for the base metal and 10*F NDT for the welds. 2.4 CRITICAL FLAW SIZE DETERMINATION , The applied stress intensity f actor (K;) and the material f racture toughness values (K la and Kyc) can be used to determine the critical flaw size values used to construct the handbook charts. For normal, upset and test conditions, the critical flaw size a is determined as the depth at which the applied stress intensity factor K cxceeds the arrest fracture toughness la' For emergency and f aulted conditions the minimum flaw size for crack initiation is obtained from the first intersection of the applied stress intensity factor (K )g curve with the static fracture toughness (Kgc) curve. Crack arrest calculations were not utilized for the steam generators and pressurizers considered in this handbook even though they are specifically allowed by Section XI. 1451E:10/032086 2-4
l l TABLE 2-1 l
SUMMARY
OF STEAM GENERATOR TRANSIENT GROUPING FOR FATIGUE ANALYSIS , Transient Total Cycles ( Croup Description Cycles In Group 1 No Load 220 220 l 2 Plant Loading /Unioading 0-15% 1500 1500 3 Full Load 13200 13200 a 4 Large Step Load Decrease
- 200 4350 Step Load Increase 2000 Step Load Decrease 2000 Loop Out of Service-Shutdown 80 Loop Out of Service-Startup 70 5 reedwater cycling 2000 2000 6 Loss cf Lead
- 80 680 Less of Power 40 Inadvertent Startup 10 Control Rod Drop 80 Par:ial Loss of Flow 80 Reactor Trip A 230 Reactor Trip B 160 7 Inadvertent RCS Depressurization 20 30 Reactor Trip C 10 8 Excessive Bypass Feedwater 30 90 Inadvertent Safety njectien 60 9 Bypass Line Te=pering valve Failure 20 20 2-5
TABLE 2-1 (cont'd) Transient Tetal Cycles Group Description Cycles In Group 10 Excessive Teodwater Tiow 30 30 11 Primary Side Leak Test 200 200 12 Secondary Side Leak Test 80 80 13 Secondary Side Hydrotest 10 10 14 Tube Leak Test 840 psig
- 80 800 Tube Leak Test 600 psig 120 Tube Leak Test 400 psig 200 Tube Leak Test 200 psig 400 15 OBE 400 400 2:0TES:
- Umbrella transient Transients not included have a negligible effect on the se condary side of the steam generator.
2-6
TABLE 2-2 SUNRY OF THE PRESSURIZER TRANSIENT FOR FATIGUE ANALYSIS
# of Cycles Transient 1200 Heatup .
1200 Cooldown 200 l No Load 13,200 Full Load 36,600 Unit Loading 20 Turbine Roll Test 2000 Step Load Increase Baron Concentration Equalization 26,400 520 Group #1 Umbrella Inadvertent Startup of an Inactive Loop Loss of Load Inadvertent S.I. Actuation large Step Load Decrease with Steam Dump Nomal Loop Shutdown Nomal Loop Startup Inadvertent Auxiliary Spray / Inadvertent RCS 10 Depressurization Inadvertent RCS Depressurization 540 400 OBE 10 Primary Side Hydrotest 200 Primary Side Leak Test 200 Secondary Side Leak Test 2-7
k 300 = KI f g 200 {KIc ---- E 8 3 t. a
$ c t
a f E
$ 100 e
m NOTE: An Example 0 l I I I I i 1 I I 0.0 0.1 0.2 0.3 0.4 0.E 0.6 0.7 0.8 0.0 't.0 FRACTIONAL DISTANCE (a/t} KI PLOT Figure 2-2 Determination of Critical Flaw Size - a Schematic Example, 2-8
SECTION 3 FATIGUE CRACK GROWTH ; In applying code acceptance criteria, as introduced in Section 1, the final flaw size a fused in criteria is defined as the ininimum flaw size to which the detected flaw is calculated to grow at the end of the design life, ,or until the next inspection time. In this handbook, ten , twenty- and thirty-year inspection periods are astumed. These crack growth calculations have been carried out for all the regions the , Byror, steam generators and pressurizers for which evaluation charts have been constructed. This section will examine each of the calculations, and provide the methodology used as well as the assumptions. . The crack growth calculations reported here are extensive because a range of flaw shapes have been considered, to encortpass the range of flaw shapes which could be encountered in service. . 3.1 ANALYSIS HEltt000 LOGY , The analysis procedure involves postulating an initial flaw at specific regions and predicting the growth of that flaw due to an imposed series of Icading transients. The input required for a fatigue crack growth analysis is basically the information necessary to Calculate the parameter AKg wnich depeads on crack a'id structure geornetry and the range of applied stresse.s in the area where the crack exists. Once 4K gis calculated, the gro.ith due to that particular stress cycle can be calculated by equations given in Section 3.3 and Figure 3-1. This increment of growth is then added to the original crack size, and the analysis proceeds to the next transient. The ' procedure is continued in this manner until all the transients known to occur in the period of evaluation have been analyzed. The transients ccnsidered in the analysis are all the design transients contained in tf e vessel equipment specification, as sncwn in Section 2, Tables 2-1 and 2-2. These transients are spread equally over the design lifetime of i t P 1451E:lD/031906 3-1
i l th2 vessel, with the exception that the preoperaticnal tests are considered first. Faulted cocditions are not considered because their frequency of I occurrence is too leu to affect fatigue crack growth. ! Crack grcwth calculatiores for steara generator were dc' rried out for a range of ; flaw depths, and three basic types. The first type was a surface flaw with length (t) equal to six tirres its depth (a). The seccnd type was a rohtinuous surface flaw, which represents a worst case for surf ace flaws, and the third was an embedded flaw, with len.jth (t) equal to three times its width (?a). Crad growth calculaticns for pressurizer were performed using the flaw assumptior's adopted for the steam ge,ierator except for the case of embedded , 71aws an asoect ratin (*1/2a) of 6: 1 was used. . 3.7 STRESS INTENSITY FACIOR EXP;E5510NS Str.ess intensity f actorr wers calculated f rom methods available in the ' literature f or each of the i' law ty;ec analyzed. The surface flaw with . aspect ratio 6:1 was analyzed using en expressicn develcped by McGowan and Raymund [2] Mhere the stress ititensity f actor Ky is calculated from the actual stress profile through the wall at the location of interest. Tr.e maximum and ?niniseum stre:s profiles corresponding to each transient are , represented by a third order polyr.omta), such that: o (X)
- A0*A1 +O 2 *A 3 ,
The stress intentity factor K g (+) c'ne be calculated anywhere along the crack f r. oat. The point of niaxir.um crack depth is reDresented by + = 0 The folicwing expressiin is used for calculating Kg (4). Kg (4) = (cosk& sin k [ (A0 "O + A) H) c
+ A A2 "2 + 3- 3 3) 1451E:lD/032086 3-2 l
1
The magnification factors H ' 0 "I' "2 and H3 are a function of 4 and are cbtained by the procedure outlined in referencc[3] , The stress intensity factor for a continuous surface flaw was calculated using an expression for a*a edge cracked plate [9]. The stress distribution is linearized through the wall thickness to determine membrane and bending stress and the applied K is calculated from: g K g = e, Y, d & og Yg d The cagnification factors Y ,and YB are taken f rom [9] and a is the crack depth. For an embedded flaw, the stress intensity factor expression provided in Appendix A of Section XI was used directly, which again requires linearizing the strssses. The flag shape-was set with length equal to three times the width, and the ecce.ntricity ratio as defined in Figure 1-3 (2e/t) was set at (1.25, which corresponds to a flaw near the inside surf ace of the vessel, although still cnibedded. This flaw will provide a worst case calculation of stress intensity factor f or embedded flaws. Since the calculated crack growth was very small for this case, no further consideratien of other flaw shapes or locetions was deemed necessary for an embedded flaw. The embedded flaw stress intensity f actor expression given in [6] was used for the f atigue crack growth calculatica for the pressurizer and this results in more realistic values than obtairted by the linearization discussed above. 3.3 CRACK GROWTH RATE REFERENCE CURVES The crack growth rate curves used in the analyses were taken directly from Appendix A of Section XI of the ASME Code. Water environment curves were used for all inside surface flaws, and the air environment curve was used for embedded flaws and outside surface flaws. For water environments the reference crack growth curves are shown in Fig. 3-1, and growth rate is a function of both the applied stress intensity factor range, and the R ratio (Kmin # max) for the transient. 1451E:lD/032086 3-3
For R<0.25 (AK g<19ksivin)h-(1.02x10-6) 3g 5.95 (AKg>19ksi/in)h=(1.01x10-3) 3g 1.95 where h = track Growth rate, micro-inches / cycle. For R>0.65 i (AKg<12ksi/in)h-(1.20x10-5) 3g 5.95 ,' (AKg>12ksivin)'h=(2.52x10-I) aK l.95 y For R ratio between these two extremes, interpolation is recomended. The crack growth rate reference curve for air environments is a single curve , with growth rate Deing only a function of applied aK. is also shown in Figure 3-1. This reference curve h-(0.0267x10-3) aK 3.726 1 a where, fg = track growth rate, micro-inches / cycle AK g - stress intensity factor range, ksivin "I Imax ' KImin) 3.4 FATIGUE CRACK GROWTil RESULTS The fatigue crack growth results for all locations for which handbook charts were developed are sumarized in the tables which are included in Appendix C. 1451E:10/031286 3-4
l
~
16904 1 1000
~
- ' LINEAR INTERPOLATION IS 700 - RECOMMENDED TO ACCOUNT
/
, _ . FOR RATIO DEPENDENCE OF /
WATER ENVIRONMENT CURVES, 500 - FOR 0.25 < R < 0.es FOR # U _ SHALLOW SLOPE:
= 1.01 X 'O'l 02 0"1'8$
fs 'g _ [ G g 0 2= 3.75 R + 0.00 g#40 ,p 8 g 200 - ,N 8
- 4 M=K MINMMAX f/g 8 #@g SUB. SURFACE FLAWS (AIR ENVIRONMENT)
!4 .
100 h 2 b""= 10.0267X10'31/dC'3.726 o 70 - ! n - (DETERMINE THE AK AT / 50 - WHICH THE LAW CHANGES
){
- SY CALCULATION OF THE 9- INTERSECTION OF THE
_ TWO CURVES) ( SURFACE FLAWS (WATER REACTOR ENVIRONMENT) l APPLICABLE FOR f
$ R < 0.25-M 10
- 0.25 < R < 0 A6 -
U - R > 0.85-MIN#MAX 7 -
- I f 5
. LINEAR INTERPOLATION IS RECOMMENDED TO ACCOUNT 5 - I9 f1 -
FOR R RATIO DEPENDENCE OF WATER ENVIRONMENT CURVES,
$~
f M U. FOR 0.25 < R < 0.05 FOR STEEP SLOPE:
~
4 5A5 5 = 1.02 X 10 Og AK
/ ile
_ gjg 0, = 2ssR . s.725 R=K MINMMAX f i l l I IIlllli l I I I Il lll 1 2 5 7 10 20 50 70 100 STRESS INTENSITY FACTOR RANGE (AK g (KS! fin.) FIG. 3-1 REFERENCE FATIGUE CRACK GROWTH CURVES FOR CARBON AND LOW ALLOY FERRITIC STEELS 3-5
- e u----
SECTION 4 ! DETERMINATION OF LIMITING TRANSIENTS The key parameters used in the evaluation of indications discovered during in service inspection are two critical flaw depths. The first of these critical flaw depths is calculated using stresses from governing normal, upset, and test conditions. The second is calculated based on stresses for the governing emergency and faulted conditions. Critical flaw depths are calculated based on these two sets of conditions to correspond to the two ASME Code criteria outlined in Section 1.1.1. To allow for the evaluation of indications of various shapes, critical flaw sizes are calculated for embedded flaws as well as surface flaws of other ,, shapes, with lengths up to continuous flaws. Critical flaw sizes have been calculated for emergency and faulted conditions and the results for the single most limiting transient for each region have been used directly. The most limiting emergency and faulted transient was chosen on the basis of stress. The limiting transient was found to be the Large Steamline Break (LSB) for the secondary side of the steam generator. The limiting transient was the large loss-of-coolant accident (LOCA) for the primary side of the steam generator and the pressurizer. The selection of the governing transient for normal, upset, and test conditions has been done based on the results of the stress analyses at the sections of interest [10-19]. Each transient or grouping was analyzed separately, and this made the selection of the governing transient based on stress very straightforward. 1451E:10/031986 4 -1
SECTION 5 SURFACE FLAW EVALUATION 5.1 SCOPE OF EVALUATION The surface flaw evaluation covers the following regions: The steam generator: o Tubesheet to channel head weld region (seam SGC-01) o Tubesheet to stub barrel weld region (SGC-02) o Stub barrel intermediate seam (SGC-03) < .
'- o Lower shell to cone weld region (SGC-05) o Upper shell to cone weld region (SGC-06) o Upper shell to dome weld region (SGC-08) o Feedwater nozzle to shell weld region (SGN-02) ,
The pressurizer: o Upper shell to upper middle shell weld (seam PC04) o Upper middle st. ell to lower middle shell weld (PCC3) o Lower middle shell longitudinal weld (PLO2) 5.2 CODE CRITERIA , i, The acceptance criteria for surface flaws has been readily presented in paragraph 1.1. For convenience they are repeated as follows: af 11a For Normal Conditions c (Upset & Test Conditions inclusive) and af 55a g For Faulted Conditions (Emergency Condition inclusive) l l 1451E:lD/030686 5-1
where a - The maximum size to which the detected flaw is calculated to grow f at the end of 40 year of designed life, or the period till the next inspection. 10, 20, and 30 year periods have been considered in this handbook. a = The minimum critical flaw size under normal operating conditions c (upset and test conditions inclusive) a = The minimum critical flaw size for initiation of nonarresting 4 growth under postulated faulted conditions. (emergency conditions inclusive) Alternatively criteria based on applied stress intensity f actors may be used: Kgi For normal conditions (upset & test conditions inclusive) C Kg5 For Faulted Conditions (Emergency Conditions inclusive) where K g
=
The maximum applied stress intensity factor for the flaw size af to which a detected flaw will grow, during the conditions under consideration. K,g
=
Fracture toughness based on crack arrest for the corresponding crack tip temperature. K k
=
Fracture toughness based on fracture initiation for the corresponding crack tip temperature. 1451E:10/031986 5-2
5 5.3 LONG11UDINAL FLAWS AND CIRCUMFERENTIAL FLAWS l Longitudinal flaws may be defined as flaws oriented in a radial plane, such l that circumferential or hoop stresses would tend to operi them. Ori the other hand, circumferential flaws would be oriented in a radial plane such that longitudinal or axial stresses would open them. Circumferential flaws were evaluated for the steam generator in all regions. The pressurizer waslevaluated for circumferential flaws in two seams and for longitudial flaws at the lower middle shell longitudinal weld (PLO2). 5,.4 . BASIC DATA sin view of the criteria, it is noticed that three groups of basic data (a , f a , a g ) are required for the construction'of charts for surface flaw c evaluation. The determination of these three sets nf basic data will be discussed in the following paragraphs.
. 5.4.1 FINAL FLAW SIZE a f ,
The first set of basic data required for surfaEe flaw chart construction is the final flaw size a . As defined in IWB-3611 of ASME Code Section XI, f , a is the maximum size resulting from growth during a specific time period, , f which can be the next scheduled inspection of the component, or until the end Of vessel design lifetime. Therefore, the final depth, a after a specific f service period of< time must be used as the basis for evaluations The charts have been constructed to allow the initial (measured) indication size-to be used directly. Charts have been constructed for operational periods of 10' , E l 20, and 30 years f rom the time of detection. The final flaw size a can be calculated by f atigue crack growth analysis, f which has been performed covering the range of postulated flaw sizes', and flaw t 1451E:10/031986 , 5-3
shapes at various locations of the reactor vessel needed for the construction of surface flaw evaluation charts in this handbook. All crack growth results have been summarized in the appropriate sections of the Appendix. Notice that all the finite surface flaws and embedded flaws analyzed are semi-elliptical in shape. Crack growth analyses for finite surface flaws with aspect ratio (length to depth) less than 6:1 have utilized the results of 6:1, and for any flaw with aspect ratio larger than 6:1, the results of the continuous flaw are used. This is conservative in both cases. 5.4.2 MINIMUM CRITICAL FLAW SIZE c a AND/0R a$ By definition acis the minimum critical flaw size for normal operating
, conditions. It is calculated based on the load of the most limiting transient of normal operating conditions. Similarly, a$ is defined as the minimum critical flaw size for faulted conditions. It is calculated based on the most governing emergency or faulted condition. The governing transients are dif ferent for different regions, and those for each category of load condition have been identified in tables in each section of the Appendix. The theory and methodology for the calculation of a$ and a has been provided in Section 2.
1 5.5 TYPICAL SURFACE FLAW EVALUAlION CHART The two basic dimensionless parameters, which can fully address the characteristics of a surface flaw are used for the evaluation chart
- construction. Namely, o Flaw Shape Parameter a/t or aspect ratio (AR) - t/a o Flaw Depth Parameter a/t where, t -
Wall thickness, in. a - flaw depth, in. 1 - flaw length, in. 1451E:lD/031986 5-4
A typical chart was chosen for illustraticn purpose as follows: (Refer to Fig. 5-1) o The flaw shape parameter a/t was plotted as the abscissa f rom 0 (continuous flaw) to .5 (AR = 2.0) o The flaw depth parameter a/t was plotted as the ordinate. o The lower curves is the code acceptable flaw depth tabulated in Table IWB-3511-1 of Section XI. These curves indicate the acceptance standards of the code, below which analytical evaluation is not required. .. o The upper boundary curve shows the maximum acceptable flaw depth beyond which no surface flaw is acceptable for continued service without repair. This upper bound curve has been determined by the f racture and fatigue evaluations described herein. o Any surface indication which falls between the two boundary curves will be acceptable by the code rules, based on the analytical justification provided herein. However, IWB-2420 of ASME Section XI requires future monitoring of such indications. The surface flaw evaluation charts constructed for various locations in the steam generator and pressurizer are presented in Appendix A. 5.6 PROCEDURE FOR THE CONSTRUCTION OF A SURFACE FLAW EVALUATION CHART An example is used here to show how a surface flaw evaluation chart was constructed. Example Required: To construct a surface flaw evaluation chart for the circumferential flaws at the tubesheet-stub barrel weld region (SGC-02), at the inside surface. 1451E:10/031986 5-5
SteD 1 Determine the critical flaw sizes f rom Table A-2.1 as follows: Load Allowable Critical Flaw Sizes Condition Flaw Continuous AR=6.0 AR=2.0 N/U/T* Longitudinal a = 1.562 c a = 3.13 c a = 3.13 c E/F* Longitudinal ag = 3.13 ag = 3.13 ag = 3.13 Step 2 . Determine the maximum code acceptable critical flaw depth (ac ra). We g have: Load Allowable Critical Flaw Sizes Condition Flaw Size Continuous ARs6.0 AR=2.0 N/U/1 .1 a c . 62 0.313 0.313 (0.8371)** E/F .5 a g 1.565 1.565 1.565 Therefore the limiting critical flaw depth (in.) is: 0.1 a c 0.1562 0.313 0.8371**
- N/U/T normal, upset, and test conditions E/F emergency and faulted conditions
** Number in the bracket is obtained based on the criteria, KI 5 KIA/ 10 and 0.8371 in. is selected as the allowable flaw size since 0.8371" > 0.313" 1451E:10/032086 5-6
Step 3 Determine the corresponding initial flaw sizes which will grow to the above critical flaw sizes after 10 years of service. We define the above limiting critical flaw depth as a . The initial flaw f size a can be found f rom the f atigue crack growth results of Table C-3 by using linear interpolation, or extrapolation. Similar calculations are performed at 20 years and 30 years, to produce curves for these longer periods, as appear in Figure A-3.2. I l For example,
, a f = 0.1562" f or continuous flaw From Table C-3, a
f = 0.1562 in. Initial flaw size 10 yrs 20 yrs 30 yrs 0.157 0.16415 0.17077 0.17791 0.313 0.33899 0.33606 0.39751 Initial flaw size to grow to af = 0.1562 in. af ter 10 yrs is found by extrapolation, 0.33899 - 0.16415 0.1562 - 0.16415 0.313 - 0.157 "a g - 0.157 ag= 0.1499 ag/t = 0.0479 repeating similar calculations at different aspect ratios, the following table for 10 years can be constructed, Continuous flaw AR = 6 AR = 2 a f 0.1562 0.313 0.8371 ag 0.1499 0.3028 0.8017 1451E:10/032086 5-7
SteD 4 Determine a/t vs. a/t at the beltline where t - 3.13", and a = a,. We find: Continuous Finite Surface Finite Surface Flaws Flaws AR-6 Flaws AR=2 a/t 0 .167 .5 0.1499 , 4,gg 0.3028 ,9,7g 0.8017 a/t = 25.6% i 3.13 3.13 3.13 Step 5 Plot a/t vs. a/t as shown in Fig. 5-1 as the upper curve. This compensates for ten years of f atigue crack growth, thus allowing the measured flaw indicaton to be used directly. Step 6 Plot a/t vs. a/t data f rom Table IWB-3511-1 of Section XI as the lower curve of Fig. 5-1. l 1451E:10/032086 5-8
The values of Table IWB-3511-1 f@r code editiens up until the Winter 1985 addendum are: Aspect Surface Ratio, Indication, a/t a/t. % 0.00 2.0 0.05 2.1 0.10 2.3 0.15 2.6 0.20 2.9 0.25 3.2
- 0.30 3.7 0.35 3.7 0.40 3.7 0.45 3.7 0.50 3.7 The above six steps would complete the procedure for the construction of the surface flaw evaluation charts for ten years of operating life. Crack growth results for 20 and 30 years were used to construct separate curves for those operating periods, and all three of these charts are found in Figure A-2.2. A separate chart is provided for outside surface flaws in most regions, but the constructon follows the same procedure.
In the interest of prudence, the allowable flaw depths for surface flaws have been limited to 20 percent of the section thickness. In some cases, allowable flaw depths greater than 20 percent of the wall thickness were obtained, and although these values were not used in the evaluation charts, they have been tabulated in Table 5-1. 1451E:10/032086 5-9
10 Years 20 Years 30 Years 40 Years : Ei
- A
'i' h V i%RA c
=
- iF iiii Fi : .
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- jkjg'Kjf{ jj-18 jj ljj-: jyj j: 4j
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WITHIN THIS ZONE THE SURFACE Ce '"! u 7 i 3
? ...I I il F I i if i 1!! -
t FLAWIS ACCEPTABLE BY CODE 12 Jid! ifj it:i ii ANALYTICAL CRITERIA (IWB 3600)
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illi jili lii iiji i: ! ; gW71 L ! j- ill! !!!!
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gii !!!! Ei l!!! -l !!!! ! . til: 11! 11.1 !i..! Il1 MD% i+ in! imM- ;i 1
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!!!! !!!! !!i! !!i Sli !!1! i li illi iill I!n]Il !!!! lh!!! !!1 !!A illi !!!! ll
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! jiit t-- j IS REQUIRED
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iiii i!Il iiii lii iiii liti ill! lih itl:
- li !!!! ' !!l!!! .! !- Ll 0,
0 0.1 0.2 0.3 0.4 0.5 FLAW SHAPE (a//) Figure 5-1 Sample Surface Flaw Evaluation Chart
SECTION 6 EMBEDDED FLAW EVALUATION 6.1 SCOPE OF EVALUATION Embedded flaw evaluations were performed for the following regions: The steam generatori o Tubesheet to channel head weld region (seam SGC-01) o Tubesheet to stub barrel weld region (SGC-02) l o Stub barrel intermediate seam (SGC-03) 0 Lower shell to cone weld region (SGC-05)
. o Upper shell to cone weld region (SGC-06) o Upper shell to dome weld region (SGC-08) o Feedwater nozzle to shell weld region (SGN-02) i The pressurizer:
o Upper shell to upper middle shell weld (seam PC04) o Upper middle shell to lower middle shell weld (PC03) o Lower middle shell longitudinal weld (PLO2) 6.2 EM8EDDED VS. SURFACE FLAWS According to IWA-3300 of the ASME Code Section XI, a flaw is defined as embedded, as shown in Figure 6-1, whenever, S > a [For editions prior to 1980) or f<0.5 [For editions of 1980 and thereafter) f<0.714 f I I 1451E:lD/032086 6-1
i where ! 6 - Distance of the centerline of the embedded flaw to the surface (in.) a - the embedded flaw depth, (defined as the semi-minor axis of the elliptical flaw.) Code Editions of 1980 and later The surface proximity rules were liberalized with the 1980 code, allowing flaws as near the surface as four-tenths their width to be considered embedded. Specifically, the criterion for a flaw to be considered embedded was changed to S > 0.4 a, so substituting into the definition for 6 we now
,, find:
a = 6-S f<0.714 where S - the minimum distance from the flaw edge to the nearest vessel wall surface Therefore, the limit for a flaw to be considered embedded is ag= 0.714 6 for code editions of 1980 and thereaf ter. A flaw lying within the embedded flaw domain is to be evaluated by the embedded flaw evaluation charts generated in this section of the handbook. On the other hand, a flaw lying beyond this domain should be evaluated as a surface flaw using the charts developed in Section 5 of the handbook instead. The demarcation line between the two domains is shown graphically in Figure 6-5. In other words, for any flaw indication detected by inservice inspection, the first step of evaluation is to define whether it is a surface flaw or an embedded flaw, and then to choose the appropriate charts for evaluation. 1451E:lD/032086 6 -2
6.3 CODE CRITERIA As mentioned in Section 1, the criteria used for the safe end and all the embedded flaws are of IWB-3612 of Code Section XI. Namely, Ky5 ) For Normal Conditions (upset & test conditions inclusive) e Kgi For Faulted Conditions (Emergency Conditions inclusive) where K g
- The maximum applied stress intensity factor for the flaw size a to which a detected flaw will grow, during the conditions f
under consideration. K,g
= Fracture toughness based on crack arrest for the corresponding crack tip temperature.
K g
- Fracture toughness based on fracture initiation for the corresponding crack tip temperature.
The above two criteria must be met simultaneously. In this handbook only the most limiting results have been used as the basis of the flaw cvaluation charts. 6.4 BASIC DATA In view of the criteria based on stress intensity factor, three basic groups of data are needed for construct'on of embedded flaw evaluation charts. They are: KIc' K la, and K7 , respectively. The units used herein for all these three parameters are ksivin. 1451E:10/032086 6-3
Ic and Kg , are the initiation and arrest f racture toughness K (respectively) of the vessel material at which the flaw is located. They can be calculated by formulas: Kge = 33.2 + 2.806 exp IM#NOT + 3 (1) and Kg , = 26.8 + 1.233 exp[.0145(T-RTNDT + 160*F)] (2) Kg is the maximum stress intensity factor for the embedded flaw of interest. The methods used for determining the stress intensity factors for embedded flaws have been referenced in Section 2. Notice that both K Ic and Kg , are a function of crack tip temperature T, and the material property of RT at the tip of the flaw. The upper shelf NDT fracture toughness of the reactor vessel steel is assumed to be 200 ksivin. Kg used in the determination of the flaw evaluation charts is the maximum stress intensity factor of the embedded flaw under evaluation. It is important to note that the flaw size used for the calculation of Kg is not the flaw size detected by inservice inspection. Instead, it is the calculated flaw size which will have grown f rom the flaw size detected by inservice inspection. That means that the embedded flaw size used for the calculation of Kghad to be determined by using f atigue crack growth results, similar to the approach used for surface flaw evaluation, as illustrated in the previous section. However, unlike the surface flaw case, the fatigue crack growth for an embedded flaw (even af ter 40 years of service life) is very small in comparison with that of a surface flaw with the same initial depth. Consequently, in the handbook evaluations, the detected flaw size has been 1451E:10/032086 6 -4
3- used for evaluation by the charts without any appreciable error.* This simplifies the evaluation procedure without sacrificing the accuracy of the results. A detailed justification of this conclusion is provided in the next section. 6.5 FATIGUE CRACK GROWTH FOR EMBEDDED FLAWS The-environment of an embedded flaw is considered to be inert, or air. The crack growth rate for air environment is far smaller than that of the water environment, to which the surface flaw is conservatively considered to be exposed. Consequently, the fatigue crack growth for an embedded flaw must be far smaller than that of an inside surface flaw (of the same size and under l the same transient conditions). Numerically, the fatigue crack growth of an
, embedded flaw'is so low that the difference between the initial flaw depth and its final crack depth is negligible.
This engineering judgment has been demonstrated by an illustrative example, as follows: Example 4 The tubeshect-channel head weld (SGC-01) region of the Byron steam generators was used as a demonstration. The crack growth results for a range of postulated axial inside surface flaws are as follows, as also shown in Table C-2 of this appendix. These flaws were assumed exposed to the water environment, and the environmental fatigue crack growth law of Section XI (given in Sectin 3) was used. The crack growth results obtained for this example are not large, but are much greater than those obtained for an embedded flaw, to be discussed next. 4
- This conclusion holds for the range of flaw sizes acceptable by the rules of Section XI, IWB-3600. It would not necessarily hold ir, general.
t 1451E:10/032086 6-5 I
Postulated Initial Crack Depth Crack Depth (in.) Af ter Year 10 20 30 40 0.6 0.603 0.605 0.608 0.611 0.7 0.704 0.708 0.712 0.717 0.8 0.806 0.812 0.818 0.824 0.9 0.906 0.911 0.917 0.923 1.0 1.006 1.013 1.019 1.026 Similar crack growth analysis was performed using the embedded flaw case the same set of transients
- and the number of cycles
- as the surf ace flaw run, the
~ results are as below. The air crack growh reference law was used. Initial Crack Depth Crack Depth (in.) After Year 10 20 30 40 0.6 0.6001 0.6001 0.6002 0.6003 0.7 0.7001 0.7002 0.7003 0.7004 0.8 0.8001 0.8003 0.8004 0.8006 0.9 0.9002 0.9004 0.9006 0.9008 1.0 1.0003 1.0006 1.0009 1.0011 In comparing the results of the two types of flaws under the same service conditions, it is seen that the final crack growth for an embedded flaw is less than 5% of that for a surface flaw under the same operating conditions as tabula'ted below:
- As specified in Table 2-1.
1451E:10/032006 6-6
r Postulated Final Crack Depth (in) Crack Growth fer Initial Crack Af ter 40 Years Embedded Flaws, Depth. (in) Surface Flaws Embedded Flaws _ in (%) 1 0.6 0.611 0.6003 2.7% 0.7 0.717 0.7004 2.4% 0.8 0.824 0.8006 2.5% 0.9 0.923 0.9008 3.5% 1.0 1.026 1.0011 4.2% In conclusion: in the construction of the evaluation charts for the embedded flaws, the accuracy of the charts would not be impaired using the flaw size found by inservice inspection directly. However, the initial flaw which would grow to a given final flaw size after 10, 20 and 30 years can be found by using the method described in the surface flaw evaluation (section 5) when fatigue crack growth of embedded flaw is significant. 6.6 TYPICAL EMBEDDED FLAW EVALUATION CHAR 1 The details of the procedures for the construction of an embedded flaw evaluation chart are provided in the next section. In this section, instructions for reading a chart are provided by going through a typical chart, Figure 6-2, step by step. This would help the users to become familiar with the characteristics of each part of the chart, and make it easier to apply. Following are the highlights of a typical embedded flaw evaluation chart. (Refer to Figures 6-2 through 6-5).
- 1. The abcissa of the chart in Figure 6-2 represents the flaw depth a, of the embedded flaw.
1451E:10/032086 6-7
- 2. As defined by code, the embedded flaws with a depth less than 0.714 &
(a, < ),4 4) should be considered as embedded flaws. Any embedded flaws greater than or equal to 0.714 6 (a, > 0.714 6) should be evaluated by means of surface flaw charts instead.
- 3. A key parameter for evaluating an embedded flaw is 6, the distance between the centerline and the nearest surface of the vessel wall.
A range of 6 between t/16 and h have been considered in constructing Figure 6-2.
- 4. For each specific value of 6, such as t/16, 3t/32, t/8 etc., a family of curves was plotted for a range of aspect ratios *, for 1:3 through 1:10 (Figures 6-2 through 6-4). This corresponds to a/t values ranging from j 0.333 to 0.1. For any specific flaw depth a at the abscissa, a corresponding value gK at the ordinate can be found in Figure 6-2, for any distance to the surface, 6. ,
- 5. The range of aspect ratios f rom 1:3 to 1:10 was chosen to encompass the range of flaws which might be detected. Within this range, interpolation can be used for any other aspect ratio. Use the 1:3 curve as a lower bound and the 1:10 curve as an upper bound.
- 6. In this specific chart, the code acceptance limit line was 8
0" 0 = 63.2 ksi in because governing condition was a reactor trip transient, and the operating temperature of the transient was over The 230*F across the wall thickness at all times and RTNDT = 10*F. shelf value of 200 ksi/in for K h was used.
- 7. The intersection of the Kg curve with the code acceptance limit line is the maximum flaw size acceptable by code for the specific curve.
- Note that aspect ratio AR a a/t 1451E:lD/032086 6-8
- 8. Refer te Figures 6-2 threugh 6-4. It is seen that for Cne Kgcurve the crack depth required to reach the code limiting stress of 63.2 ksi/in is less than the maximum allowable flaw depth for embedded flaws of 1/8t (0.63 in.). This curve is the Kg curve for crack with 6 - 3t/16 and an aspect ratio of 1:10 (Figure 6-2). In this case, for the crack growth to be such that the crack remains below the surface / embedded demarcation line in Figure 6-5 af ter 10, 20, or 30 years, the initial crack size must be reduced. The revised lines reflecting this reduction for 10, 20, and 30 years are also shown in Figure 6-5. As can be seen, the number of embedded flaw charts required is reduced by using the most limiting K g curve from Figures 6-2 through 6-5 to construct the embedded flaw evaluation chart of Figure 6-5.
'9, The maximum acceptable flaw size can be found from the chart by determining the abscissa of the intersection points within a 5 t/8, Aspect Ratio Maximum Acceptable of the Flaw a/t Flaw Size (in) 10:1 0.1 0.631 (4/t = 3/16) 6:1 0.167 a - 6/1.4 3:1 0.333 a - 6/1.4
- 10. The maximum acceptable embedded flaw size per IWB 3600 for 6 e h has been depicted in Figure 6-5. This simpler flaw cvaluation chart, described in the following paragraph, is the type included in the handbook, as may be seen in Appendix A.
These embedded flaw evaluation charts, constructed for various locations of the reactor vessel, are presented in Appendix A for each region to be inspected. 6.7 PROCEDURES FOR THE CONSTRUCTION OF EMBEDDED FLAW EVALUATION CHARTS An example was used in this section to show how an embedded flaw evaluation chart was constructed step by step as follows: l 1451E:10/032086 6 -9 l
l Example
)
To construct an embedded flaw evaluation chart for the circumferential flaws at the tube-sheet to channel head weld (SGC-01). The reactor trip transient was determined to be the governing condition for this example. Sten 1 Calculate K ic f r various flaw distances beneath the inside of the steam generator wall surface. The procedures of the calculation are as follows: o Plot the temperature across the wall thickness during worst time step (639.8 sec.) of the reactor trip transient (12). The reference shows that the minimum temperature through the cross section was found to be 230*F. Thus temperature throughout the wall was considered to be 230*F. o Calculate the corresponding gK , by the formula given in equation (1) in this section. The value of RT ND1 is considered to be 10'F through the section, o Calculate the values of Kg ,//10. If temperature varics through the section, calculate K g,//10 at each location a corresponding to the temperature. Step 2 Calculate Kg values for embedded flaws of various size, various aspect ratios, and at various distances underneath the surface. In total, 138 cases were analyzed by closed form stress intensity factor expressions (8). . The 138 analyzed cases were tabulated in Table 6-2. , l 14510:10/032086 6-10
Sten 3 The Kg results of the 138 cases were tabulated in Table 6-3 through 6-7 and plotted in Figures 6-3 through 6-4. K The code acceptance limit of was plotted on all these figures as a guideline for evaluation. Steo 4 Determine the maximum acceptable flaw size: , lhe basic concept of the evaluation is that the part of the curves under the K line are acceptable by code criterion. Therefore, the intersection of a K C curve with the 0 ndicates the maximum flaw depth acceptable by the code. The acceptable maximim flaw sizes for various locations of flaws beneath the steam generator surf ace, 4, were plotted as shown in the final flaw evaluation chart, Figure 6+5, which was derived using the procedure of Section 6.6, Figure 6-5 is the final embedded flaw evaluation chart at tube-sheet channel head weld region (SGC 01) including fatigue crack gf'owth. The above four steps have completely described the procedures of the construction of an. embedded flaw evaluation chart for the circumferential flaws at the tube-sheet channel head weld r.agion of tne steam generator. The basic concept for the interpretation of the curves in a typical evaluation chart is that any flaw size which lies on the curve above the code acceptance limit line is not acceptable for continued service without repair. The intersection of a curve with the code acceptance limit line is therefore, the maximum acceptable flaw size for that particular case. For instance, in view cf Figure 6-2 for a flaw located at 4 - h, with an aspect ratio of 10:1, the maximum acceptable flaw size is found to be about .815" which is 1451E:10/031986 6-11
less than the domain value a g = 0.9011". However, the acceptable maximun flaw depth is t/8 (- 0.63) at locations t/16 < & < t/4. The acceptable flaw depth of 0.815 in at 4 - t/4 exceeds 0.63 in. Therefore, the acceptable flaw depth (a) at & = t/4 is considered to be t/8. Figure 6-5 shows the initial flaw size to grow to acceptable code limit value af ter 10, 20 and 30 years. The methodology of the embedded flaw evaluation chart is identical with that described in the previous section. 6.8 COMPARISON OF EMBEDDED FLAW CHARTS WITH ACCEPTANCE STANDARDS OF IWB-3500 The handbook charts for embedded flaws do not show the acceptance standards of Section XI, as the surface flaw charts do. Therefore, it is not cicar from the charts themselves how much is gained from the analysis process over the " standards tables contained in IWB-3500. Such a comparison cannot be made directly on the embedded flaw handbook charts, because the charts are applicable for a full range of sizes, shapes and locations. The purpose of this section is to provide such comparisons, and to discuss the results of those comparisons. A typical example will be for the tube-sheet channel head weld, whose handbook chart is provided in the Appendix, and also in Figure 6-5. The handbook chart values have been compared with the acceptance standards tables in Figure 6-6. In this figure the values f rom Table IWB-3511-1 have been plotted as the base curve, and the limit curves for embedded flaws justified by analysis are shown as the other lines. It can be seen that the range of embedded flaw shapes and depths justifiable by analysis is related to the flaw location within the wall. The deeper the indication, the more benefit is obtained from the analysis. 1451E:10/032086 6-12
TABLE 6-1
SUMMARY
OF FLAW SIZES SHAPES AND LOCATIONS USED IN CONSTRUCTION OF AN EMBEDDED FLAW EVALUATI()N CHART Sistence of Latedded flew Depth (ir..) T14w to AR 1:10 AR 1:6 At 1:3 Surfeca half of Flaw Malf of Flaw Half of Flaw (13.) Width (a in.) Wiatt: (a in.) Width (a in.) ( = t/16 0.03 0.03 0.C3 (9 3154 in.) 0.06 0.C6 0.C6 j 0.09 0.09 0.09 'x
- g 0.12 0.12 0.12 =
e i 0.15 0.15 0.15 0.18 0.16 0.18 =* - a
~ e= 0 0.21 0.21 0.21 0.2253 0.2253 0.2253
- e a 3t/32 0.04 G.04 0.04 jg (0.4731 te.) 0.04 0.Ce 0.08 , f 1 0.12 0.16 0.12 0.30 0.t2 0.16
{/ 0.20 0,2G 0.20 _ M* f y 0.24 0.24 0.24 Y 0.28 0.28 0.20 8 0.32 0.32 0.32 j- x,, 0.3379 0.3379 0.3379 f = t/8 0.05 0.05 0.05 I (0.6308 in.) 0.10 0.10 0.10 g 0.15 0,15 0.15 0.20 0.20 IOU 0.20 S, e, 0.25 0.25 0,25 - - 2 0.30 0,30 0.30 (o,4,o) 0.35 0.35 0.35 0.40 0.40 0.a0 0.4505 0.4505 0.4505 6-13
TABLE 6-1 (Continued) ,
SUMMARY
OF FLAW SIZES SHAPES AND LOCATIONS USED IN CONSTRUCTION OF AN EMBEDDED FLAW EVALUATION CHART i Distance of Embedded Flaw Depth (in.) Flaw to AR 1:10 AK 1:6 AR 4 3 Surface Half of Flaw Half of Flaw Half of Flaw (in.) Width (a in.) Width ta it.) kidth (6 in.) 4 = 3t/16 0.06 0.06 0.06 ' (0.09461 in.) 0.12 0.12 0.12 O.18 0.18 0.18 0.24 0.24 0.24 , , 0.30 0.30 0.30 0.36 0.36 0.36 0.42 0.42 0.42 0.48 0.48 0.48 , 0.54 0.54 0.54 0.60 0.60 0.60 0.6758 0.6758 0.6158 i e = t/4 0.1 0.1 0.1 i l' (1.2615 in.) 0.2 0.2 0.2 O.3 0.3 0.3 0.4 0.4 0.4 0.5 0.5 0.5 0.6 0.6 0.6 0.7 0.7 0.7 i 0.8 0.8 0.8 0.9011 0.9011 0.9011 4 6-14
TAPLE 6-2 STRESS IhTEfG)TY FACTCR cnctJLATICfC FOR CIRCL'}FFREATIAL EMBEDDED FLAWS CFitTERED AT A DTSTATCE 6 : T/16 FF0F TPF ,1rRFACE Ill THE C!lA!JFEI. HEAD-WEFT,UFET JUTCTION
._DPE2b7110-CD1T17]011 - ---. . . . DK YJ. TAT]DR DF. FM. ., . . . . . ._ W1LL.1BICDTBSS.__ . Re.ac.tprJrJp_. - _ __....._...EJrr mfeLentja]._._ _____ _. _I. _S DM (in.)
DISTAfJCE PM.IMIR FIFEFR J17ENSJTJTR FrR VAF)D!l_S_lSPICT_f> TIDE FROM FilW __1:10..__._..__....._ l_:6_._. ............ ........ 1:3_
!!AJOR AXTS Pa]f of K F51r of E* Falf of TO Sl!RFACE rnirmr dia.
- clinor dia. minor dia. K" Lin.). - _ __ _ _ _ _ _ _ . . . . . . . . . . . . . . . . . . . - - _ . _ _ _ _ _ _
0.03 15.9 0.03 15.0 0.03 12.6 5= T/16 0.06 22.6 0,06 21.4 0.06 18.0 (0.3154 in.) 0.09 27.9 0.09 26. li 0.09 22.3 ? 0.12 32.5 0.12 30.7 0.12 26.0 0 0.15 36.6 0.15 3n.6 0.15 29.3 0.18 40.4 0.18 38.1 0.18 32.3 0.21 43.9 0.21 41.5 0.21 35.2 0.2253 45.7 0.2253 43.2 0.2253 36.6
TAILE 6-3 STRF.SS IlffE!GMT FACTOR CALCULATIONS FOR C3RCUNT.RENTIAL EMBEDDED FLAWS CFf.TERED AT A DISTAf'CE 6 = T/32 FROM THE SURFACE IN THE CHANNEL HEAD - l TUBESHEET JUNCTJON l _ OPERAT1tC CC WJJJ03_. . _____p]UfMATION CF_f1JW WALL THICKESS
.Reant.or.TrJP _ _
fJr.cw.f?>rntja1..._________ T = 5.,p.46..(. in.) DISTANCE - NAXJWtt_EIffLS_lNTERSJIJfA F.OR.VAEJ.0pS. ASPFCT RATIOS._____ FROM FLAW 1:1_0_ 1:6 .__}:3 __. _ l'AJOR AXIS Half of K"*X _ Half of F'#"* Ea]f of K rex TO SUFFACE r,4 or M n. minor dia. minor dia. _UL3 _.__.................___ _ ___. _ _ _ _ _ _ . _ _ 6= T/32 0.04 17.1 0.04 16.1 0.04 13.6 (0.4731 in.) 0.08 24.4 0.08 23.4 0.08 19.4 0.12 30.1 0.12 28.5 0.12 24.1 0.16 35.2 0.16 33.2 0.16 28.1 0.20 39.7 0.20 37.5 0.20 31.8 T 0.24 44.0 0.24 41.5 0.24 35.3 g 0.28 48.0 0.28 45.4 02.8 38.6 0 32 51.8 0.32 49.0 0.32 41.7 , 0.338 53.5 0.338 50.6 0.338 43.7
TABLE 6-4 STRESS INTENSTIT FACTOR CALCt!! AT70NS FOR CIRUCPFERbMTIAL EPEEDDED PLAMS CENTERED AT A DISTAFCE 6 = .T/8 FROM TIE 511RFACE 311 TIE CHANIEL HEAD - TUBESIEET JUNCTIOfi
. DPEPMJPD..CDFDJT1DF-- ORJEMETJDR DF.ElJM -. ...... - MKTFJ.CYJKSDS_
.Remter Trjp. -...---- . . .. . . .cJr.cmr.enntJrJ .-_- _ - T.= s.046 (iri. )
DJSTANCE _.FAXIHJ1tHFE&S_JEEKSJIJES_FORyARJ.0.US. ASPECT MTIOS -- FROM FLAW 1:10 1:6 - 1:3 Pa]f of Ha3r of K"* MAJOR AXIS TO SUFFACE Ib]f of minor dia. K"# minor dia. K** minor dia.
._(im 1 6 = T/8 0.05 17.6 0.05 16.6 0.05 14.0 (0.6308 in.) 0.10 25.3 0.10 23.9 0.10 20.2 0.15 31.4 0.15 29.6 0.15 25.1 02.0 36.7 0.20 34.7 0.20 29.5 0.25 n1.6 0.25 39.4 0.25 33.4
? 0.30 46.2 0.30 43.7 0.30 37.2 0 0.35 50.6 0.35 47.9 0.35 40.8 0.40 54.8 0.40 51.9 0.40 44.3 0.4505 58.9 0.4505 55.8 0.4505 -47.7
1 TABLE 6-5 STRESS INTENSITY FACTOR CA!.ULATJ0f3 FOR C1RCUNFEREATIAI. EPEEDDED FLAWS CElfrERED AT A DISTANCE 6 = 3T/16 FROM Tile SURFACE IN THE CHANEL HEAD - TUEF12EET JUNCTION i _ _EEEPATJM. G2JIJD)L_ OMf3TATJOROF_ f1J1L_____ __ _ WALL T1[LCFESS__ j ReactorJrJp___ ___ ___ _ _ Ci rrmfn nt Jp)__t __ _ _ _ _ _ _ _ _ _ _ _ _ _ T =_ 5.046' (in.) i DISTAftE . . _ _ NXJMh l7FFM_ JFIEFSJ.TJFE F0F_Y3FlWS_3SPICT_FATIDS FRCH FLAW _ .1_:J.0_________.______JJ6_________ 1:3 YpJCR FXIS _ _ _ _ _ _ _ _ sU ."WFICC YvTC cf tiror-dia. K," Es1r of r,inot dJa. Y
#* Half of K max i minor dia, j (in.}
4 0.06 16.3 0.06 15.3 0.06 13.0 l 0.12 23.4 0.12 22.1 0.012 18.7 l 0.18 29.2 0.18 27.6 0.18 23.4
- 6 = 3T/16 c.P4 34.3 0.24 32.5 0.24 -27.6 l (0.9461) 0.30 39.1 0.30 37.0 0.30 31.5 i ? 0.36 a3.6 0.36 41.3 0.36' 35.3 i 5 0.42 47.9 0.42 45.4 0.42 38.9 0.48 52.2 0.48 49.5 0.48 42.4 0.54 56.3 0.54 53.4 0.54 45.8 j o.60 60.4 0.00 57 3 0.60 49 3
, 0.676 65.5 0.676 62.2 0.676 53.6 i l i i i i i l i I t l
'II TABLE 6_6 STRESSIlffENSITYFACTORCALCULATIONSFORC7BCUMFEREldIALEMBEDDEDFLAWS
. CEffrERED AT A DISTA!CE 6 : T/4 FROM TIE SURFACE IN TEE CHANPEI. EEAD -
TUPESHEET JUNCTIO!! __DPE_RATJNG_ CONDJIJ01__ . . _. . . . . . PPJENATIOR DF. FIM . . ....... _. Wall.I1HfK E*4_._
.Reivd.or.TrJn . . . . . . . . . . . . . . . .CJr.cmfer.entia) ___ T = 5.0M. . IJn.)._
DISTANCE PJXJMJREFEEF_JNERSITJfAFDR..VNUDilS_IsfECT FATIDs ilDM FUW 1:10......___ _ _ _.1 6 19 MAJOR AXIS Ha3 f of K** Half of Half of K TO MIFFACE trinor dia. minor dia. K** minor dia. __OR.)______.........._ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ , 0.1 17.4 0.1 16.4 0.1 13.9
&= T/4 0.2 '
. 25.5 0.2' - 24.1' O.2 20.5 i (1.2615) 0.3 0.3 30.6 26.1 32.3 -
~0.3 0.4 .
38.6 0.4 36.6 0.4 31.4 m O.5 44.6 0.5 4?.4 0.5 36.4 5- 0.6 50.5 -0.6 48.0 0.6 41.4 0.7 56.4 0.7 53.6 0.7 46.4 0.8 62.2 0.8 - 59.2 0.8 51.4 0.9011 68.1 0.9011 64.9 0.9011 56.5.. " . D N s
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a/6 > 0.5 for Code Editions Before 1980
$ a a/g > 0.714 for 1980 and i
later Code Editions _ _I ! 4 Figure 6-1 Embedded vs. Surface Flaw 1 l I 6-20
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a . FIGURE 6-2 STRES5 INTENSITY FACTOR AS A FUNCTION OF HALF FLAW DEPTH FOR THE STEAM GENERATOR CHANNEL HEAO-TUBESHEET JUNCTION (SGC-01), ASPECT RATIO 10:1, REACTOR TRIP TRANSIENT
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SECTION 7 REFERENCES
- 1. ASME Code Section XI, " Rules of Inservice Inspection of Nuclear Power Plant Components," 1974 Edition; 1983 edition (used for updated code allowable limits); and 1980 edition [ Winter 1981 Addendum) (for revised reference crack growth curves.); 1980 edition (used for updated proximity rules for embedded vs. surface flaws).
- 2. WCAP-11064, " Handbook on Flaw Evaluation for Byron Units 1 and 2 Steam Generator and Pressurizer," by Y. S. Lee and W. H. Bamford, et. al.,
March 1986.
., 3 . McGowan, J. J. and Raymund, M., " Stress Intensity Factor Solutions for Internal Longitudinal Semi-elliptic Surface Flaw in a Cylinder Under Arbitrary Loading," ASTM STP 677, 1979, pp. 365-380.
- 4. Newman, J. C. Jr. and Raju, I. S., " Stress Intensity Factors for Internal Surface Cracks in Cylindrical Pressure Vessels," ASME Trans.. Journal of Pressure Vessel Technology, Vol. 102, 1980, pp. 342-346.
- 5. Buchalet, C. B. and Bamford, W. H., " Stress Intensity Factor Solutions for Continuous Surface Flaws in Reactor Pressure Vessels," in Mechanics of Crack Growth, ASTM, STP 590, 1976, pp. 385-402.
- 6. Shah, R. C. and Kobayashi, A. S., " Stress Intensity Factor for an Elliptical Crack Under Arbitrary Loading," Engineerina Fracture Mechanics, Vol. 3, 1981, pp. 71-96.
- 7. Lee, Y. S. and Bamford, W. H., " Stress Intensity Factor Solutions for a Longitudinal Buried Elliptical Flaw in a Cylinder Under Arbitrary Loads,"
presented at ASME Pressure Vessel and Piping Conferenced, Portland Oregon, June 1983. Paper 83-PVP-92.
- 8. Marston, T. U. et. " Flaw Evaluation Procedures: ASME Section XI" Electric Power Research Institute Report EPRI-NP-719-SR, August 1978.
1451E:10/031086 7 -1
- 9. Plane Strain Crack Toughness Testina of High Strenoth Metallic Materials, ASTM STP 410, March 1969.
- 10. Byron Unit 2 Steam Generator Tubesheet to Channel Head Junction (SGC-01)
Stresses AEA-85-129, July 31, 1985 (Axial Stress).
- 11. Byron Unit 2 Steam Generator Tubesheet to Channel Head Junction (SGC-01)
Stresses-AEA-85-132, August 6,1985.
- 12. Central File - SM-7.2.4-CBE for Tubesheet-Stub Barrel Weld (SGC-02).
- 13. Byron Unit 2 Steam Generator Feedwater Nozzle to Shell Junction (SGN-02)
Stresses, AEA-85-130, August 2, 1985.
- 14. Byron Unit 2 Steam Generator Lower Shell to Stub Barrel (SGC-03) stresses, AEA-85-125, July 26,1985.
- 15. Byron Unit 2 Steam Generator Lower Shell to Cone Junction (SGC-05) stresses, AEA-85-123, July 22,1985.
- 16. Byron Unit 2 Steam Generator Upper Shell to Cone Junction (SGC-06) stresses, AEA-85-124, July 24,1985.
- 17. Byron Unit 2 Steam Generator Upper Head to Shell (SGC-08) stresses, AEA-85-126, July 29, 1985.
l 18. Byron Unit 2 Pressurizer for Longitudinal Weld Seam (PLO2) AEA-85-137, l August 13, 1985 and AEA-85-196, December 6, 1985. i l
- 19. Byron Unit 2 Pressurizer Stresses for Circumferential Weld Seams (PC03 and i
f. PC04), AEA-85-196, December 6,1985 and AEA-85-135, August 9,1985. l l l l 1451E:10/030686 7-2
APPENDIX A FLAW EVALUATION CHARTS i l
I APPENDIX A FLAW EVAfBATION A-1 INTRODUCTION TO EVALUATION PROCEDURE 1he evaluation procedures contained in ASME Section XI are clearly specified in par graph IWB-3600. Use of the evaluation charts herein follows these procedures directly, but the steps are greatly simplified. Onca the indication is discovered, it must be characterized as to its location, length (f) and depth dimension (a for surface flaws, 2a for embedded flaws), including its distance from the clad-base metal interface (S) for embedded indications. This characterization is discussed in further detail in paragraph IWA 3000 of Section XI. Tha following parameters must be calculated from the above dimensions to use the chtrts (see Figure 1-4 in the main text): a o Flaw shape parameter, 7 a o Flaw depth parameter, 7 o surface proximity parameter (for embedded flaws only), {. where t= wall thickness of region where indication is located t= length of indication a= depth of surface flaw; or half depth of embedded flaw in the width direction 6 = distance from flaw centerline to surface (for embedded flaw only) ( 6 = 5 + a) S= smallest distance from edge of embedded flaw to surface A-1
l Onca tha above paramet;rs have ban d:tcrmin:d and the dstermination made as to l whether the indication is embedded or surface, then the two parameters may be plotted directly on the appropriate evaluation chart. Its location on the chart determines its acceptability inrnediately. Tmnortant Observations on the Handbook Charts Although the use of the handbook charts is conceptually straight forward, experience in their development and use has led to a number of observations which will be helpfbl. Surface Flaws An example handbook chart for surface flaws is shown in Figure A-1.1. The flaw indication parameters (whose calculation is described above) may be plotted directly on the chart to determine acceptability. The lower curve shown (labelled code allowable limit) is simply the acceptance standards from IWB
.3500, which are tabulated in Section XI. If the plotted points fall below these lines, the indication is acceptable without analytical justification having been required. If the plotted point falls between the code allowable limit lines and the lines labeled " upper limits of acceptance by analysis" it is acceptable by virtue of its meeting the requirements of IWB 3600, which allow acceptance by fracture analysis. (Flaws between these lines would, however, require future monitoring per IWB 2420 of Section XI). The analysis used to develop these lines is doctanented in the companion technical basis document [1]. There are three of these lines shown in the charts, labeled 10, 20 and 30 years. The years indicate for how long the acceptance limit applies from the date that a flaw indication is discovered, based on fatigue crack growth calculations.
j As may be seen in Figure A-1.1, the chart gives results for surface flaw shapes up to a semi-circular flaw (aA = 0.5). For the unlikely occurence of flaws which the value of a/C exceeds 0.5, the limits on acceptance for a/L = 0.5 should be used. The upper limits of acceptance have been set at (a maximum of) twenty percent of the wall thickness in all cases, as discussed in Section 5. of [1]. l l A-2 I
Frnhedded Finus An example chart for embedded flaws is shown in Figure A-1.2. The heavy diagonal line in the figure can be used directly to detennine whether the indication chould be characterized as an embedded flaw or whether it is sufficiently close to the surface that it must be considered as a surface flaw (by the rules of Section XI). If the flaw parameters produce a plotted point below the heavy diagonal line, it is acceptable by analysis per [1] if the point is below the cppropriate a/4 limit line. If it is above the line, it cannot be justified by cnalysis, and is, therefore, not acceptable. Fcr cases where there are several acceptance limit lines, interpolation between sdjacent lines is recomended. A worked example is provided as embedded flaw cxample 5. The outennost lines should be used as the limits, with no interpolation beyond them. For example, for a/C values greater than 0.333, use the line for a/C = 0.333 in the figure, and for a/t values less than 0.167, use , the line for a/L = 0.167. Beyond these outer limits, the analyses have shown that the sensitivity to flaw shape is small. For cases where there are no branching limit lines below the heavy diagonal line (see Figure A-3.5 for example) then all flaws classified as embedded are acceptable. The only liniitation is, as discussed in Section 6 of reference [13: f<0.25 Note that the embedded flaw evaluation charts are applicable for flaws near cither the inner or outer surface, and the parameters "S" and "5" are defined from the nearest surface. Another important observation is the procedure to be used for an embedded flaw whose plotted point falls above the heavy diagonal line,and must therefore be considered a surface flaw. An example of this is provided in " Embedded flaw Example 1", but it is important to note that when this must be done, the depth of the flaw is redefined. The new depth is equal to 2a + S, as shown ir. the , example, which becomes the effective crack depth a' to be used in the surface l flaw chart in such cases. A-3
The standards for flaw acceptance without analysis cannot be shown in the anbedded flaw charts because of their generality. Therefore, they have been plotted separately in Figure A-1.3. Note the change in standards with the 1980 code, when the standards became a fbnetion of the proximity to the surface, S. General Observations Detailed examples of the use of the charts for both surface and embedded flaws cre presented below, for the specific cross section. Some points are worthy of note for locations between the cross sections which have been analyzed. A flaw indication between these two cross sections should use acceptance criteria interpolated linarly between the two appropriate charts. Similar procedures should be followed for interpolation between other regions. Surf' ace Flaw Eramole 1 Suppose an indication has been discovered which is a surface flaw and has the following characterized dimensions : a = 0.30 in. L = 1.5 in. t = 6.69 in. The flaw parameters for the use of the charts are l l l {=0.045(4.50 f=0.20 Plotting these parameters on Figure A-1.1 it is quickly seen that the indication l 1 is acceptable by analysis per [1]. To justify operation without repair it is necessary to submit this plot along with the Technical Basis doctment [1] to the regulatory authorities. l A-4 l
Fmhaddad Finu Fvnmnle 1 A lcngitudinal embedded flaw on 1.75" x 5.00", located within 0.575" from the surfcce, was detected. Determine whether this flaw should be considered as an embedded flaw. 2a = 1.75" S = 0.575" 6 = S + a = 0.575 + 1/2 (1.75) = 1.45" t = 6.69" E = 5.0" cnd, , a = 1/2 x 1.75"
= .875" Using Figure A-1.2:
a _ 0.875 = 0.13 t 6.69 i 1.45 t = T'W = 0.22 Since the plotted point (X) is above the diagonal line, the flaw must be considered a surface flaw. Now, since the flaw must be considered as a surface flaw, the depth must be redefined as the distance frnm the surface to the deepest point of the flaw. This is equivalent to circumscribing the embedded flaw with a semi-elliptic surface flaw. Operationally, the parameters are recalculated as follows. Defining a* as the corrected crack depth for the surface flaw, a' = 2a + S = 2.325" E = 5.0" [=0.347 [=0.456 A-5
R:fcrring to Figura A-1.1 fer tha surfaca flaw, it is quickly se:n that this flaw is much too large to be acceptable and must be repaired. Fmhadded Finw Framnie 2 (Point A) Suppose an indication has been discovered which is embedded, and has the following characterized dimensions: 2a = 1.0 in, f = 1.5 in, t = 9.16 in. S = 0.75 in. Cal'culating the flaw parameters, we have: { = 0.545 { = 0.333 6 = S + a = 1.25 in. f=0.136 Plotting these parameters on the embedded flaw evaluation chart, Figure A-1.2 it may be quickly seen that the indication is embedded, and is acceptable by analysis (point A), since it lies below the a/C = 0.333 limit case. Fmhedded Flaw Example ~4 (Point B) Suppose an indication has been discovered which is embedded, and has the following characterized dimensions: 2a = 1.47 a = 0.73 E = 2.20 t = 9.16 S = 1.33 Calculating the flaw parameters, we have: { = 0.08 a
- 0.33 6 = 5 + a = 2.06 f = 0.225 A-6
P10tting th;se parameters on Figure A-1.2 (point B) we sea th::t ths indicition is acc;ptable, since it falls below the line which is applicable to a/t = 0.333. (Note that if a/t = 0.167, for example, the indication would not be acceptable, Einca point B would lie above that line, as may be seen in the figure.) Fmhadded Flaw Framnle 4 (Point C) A longitudinal embedded flaw of 1.15" x 5.38" was detected at a distance S = 1.075 in underneath the surface. Evaluate the flaw for code acceptance for continued service without repair. The flaw geometry parameters are determined as follows: t = 6.69" S = 1.075" 6 = S + a = 1.65" t = 5.38" and a = 1/2 x 1.15"
= .575"
(=(h)=0.248 a, 0.575 = 0.107 t 5.38 {= 5 = 0.086 Evaluate the flaw by referring to Fig. A-1.2 and plotting the point (as point C). This is above the code acceptance limit line fcr a/t = 0.167, which should clso be used for a/t < 0.167; therefore, the flaw is not acceptable, and must be r; paired. Note: The code acceptance lines become identical with the surface / embedded flaw demarcation line with which they link up at points near the surface. Therefore, in Figure A-1.2 the code acceptance line for flaws near the surface,{1essthan0.125,isidenticalwiththe" surface /embeddedflaw demarcation line up till 1980 Code". A-7
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SURFACE / EMBEDDED FLAW DEMARCATION LINE, BEGINNING WITH 1980 CODE 0 13 .= ^*
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I ' l l { i l ! lJ f l l l I l l ! > l i i ! l l ! Figy.re_A-1.3i AcceJ_tance Standards J_or Embedded Flaws i from i ! 1 i i l Tables 5tG 3511-1 i l - 4 i I l i . t - l ! ! ! I l i i i A-10 i i
A-2 TUBESHEET-CHANNEL HEAD WELD REGION OF THE STEAM GENERA'IUR (SGC-01) A-2.1 SURFACE FLAW (LONGITUDINAL AND CIRCUMFERENTIAL FLAW) The geometry and terminology used for flaws in the SGC-01 region is depicted in Figure A-2.1. The following parameters must be detemined for surface flaw evaluation with the charts, o Flaw shape parameter f o Flaw depth parameter { where a - the surface flaw depth detected, (in.) f - the surface flaw length detected, (in.) t - well thickness at the weld (t = 5.046") The surface evaluation charts for this region are listed below: Figure A-2.2 Surface Flaw Evaluation Chart for Longitudinal Flaws at the Inside Surface of the Tubesheet Channel Head Ju'nction (SGC-01) Figure A-2.3 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) Figure A-2.4 Test Temperature Determination Chart for Longitudinal Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Both Secondary Hydro and Leak Test Figure A-2.5 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Hydro Test A-11
Figura A-2.6 Test Temperaturo Detcrmination Chart for Circumferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Side Leak Test A-2.2 EMBEDDED FLAWS The geometry and terminology used for embedded flaws at SGC-01 is depicted in Figure A-2,1. Basic Data: t = 5.046 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (defined as one half of the monitor diarteter) (in.) L = Flaw length (Major diameter) (in.) a g = Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization criteria The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw o Flawshapeparameter,f o Flawdepthparameter,f o Surface proximity parameter, f 1he embedded evaluation charts for the SGC-01 are listed below: Figure A-2.7 Embedded Flaw Evaluation Chart for Longitudinal Flaws near the Inside Surface of the Tubesheet-Channel Head Junction (SGC-01) Figure A-2.8 Embedded Flaw Evaluation Chart for Circumferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) l t A-12
Figura A-2.9 Test Temperature Detemination Chart for Longitudinal Flaws near , the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for both Secondary Hydro and Secondary Side Leak Test Figure A-2.10 Test Temperature Detemination Chart for Circtanferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Hydro Test i Figure A-2.11 Test Temperature Detemination Chart for Circumferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Side Leak Test i
! A-13 i
FIGURE A-2.1 Geometry and Terminology for Flaws at the Tubesheet-Channel Head (SGC-01) s-- I L
/
3 C-SURFACE - a_ I FLAW AT Tubesheet C (shC 1) (inside) T = 5.046 [ - s= { I I I C EMBEDDED - ie l FLAW AT ' Tubesheet channel head l , Tubesheet-channel head (SGC-C1) iiA]. (SGC-01) ( i n s i de ', - 4 s da;L T =5.046 I A-14 l
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Figure A-2.2 Surface Flaw Evaluation Chart for Longitudinal Flaws at the l Inside Surface of the Tubesheet Channel Head Junction (SGC-01)
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Figure A-2.3 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01)
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0, , 0' O.1 0.2 0.3 0.4 'O.5 FLAW SHAPE (a//) Figure A-2.5 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SCC-01) for Primary Hydro Test I
i l l l 200*F 190*F l 20 4- ' t" t l!!-! ! 1 !!!! "1 1." :t, i l 1
- i. -
l
- E
" I '
18 l !!! i 11 iW 11 1 ! ! 1:- i . i.. , I ' ' ' l 16 ' gpo p * ' j } -
.! -j j .
.{ 1: { {lll i l ll l : p
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i ii
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-
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}
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o 10 i j 1 i. j f ! i, t. i. jj
, H-. 1 i
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3 e s. i; u.
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, t j , : .. . t u
li i .-i
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1-i l ! I. L! l:! lil! ! 'l l :il 1: !L 1.11i f j li i lfl !l i -1 ! IL l l l :l liii l. I I.-l : li l? l:'; [i !! ! - lif l Li l't1 .jj j
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i- ti , i, _
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! l- I l- -
t ! F1
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+
, ! l 2 H l i il l ii l li F :l il i 11 h ! i i- 1; i t O,
I ~ E' N$ ~ UU E N ~
~
o' O.1 0.2 0.3 0.4 o.s Fl>W SHAPE (a//) Figure A-2.6 Test Temperature Determination Chart for Cirttaferential Flaws at the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Side Leak Test
~ SURFACE / EMBEDDED -
FLAW DEM ARCATION LINE 0.13 . . _ . . . . . .. . . .. ... . . . ...-,
.. . - ..ii "'Ei- liidi ii:' EMBEDDED FLAW 3 i [
w= . . .... g-e...8W. ...:g:-CONFIG ,U..R.A..T.IO..N . . =gyin. . _._rji..
._. ..g; .. _. . -...:
,e' '
FLAWS WITH 8 0.12 :.;. .u
... u .x x
g:
.m
;=. ::!r n: =c ..an:n- #Mid, ru
. n ==:. = ABOVE THIS LINE ARE
_an=- .;r:. :. .f=.:
; _ 2c ...
.awhn:
i
. . . __= :. :"n :p :.
- ..n f.--....V..... .._ .:. =_. NOT ALLOWABLE N
= = =
a= _.r
- =
0.11 . _ .@.
.. . ~ . . ' ... " .:J.a.:.:.. :. .: . J....:.::.'. g:. Z.. .:' ..:2.. ..:.:... . . ...:"~-"'10, 20, 30 years
.na . .e=~.._::r:c r:: . . . .==: ::
r..
- =.._
w, . .
._ . .. _ . . =: ... . . .
-=i.g
= ::=n:: n:: == r .:n. . . . .. : 7::. n :* == '-
= =
- /: ::
7nu
; :n: = : -~
-rs -- - . = :: ::n :nfr = =.a :. .... :- =
iis55 EF.- . i=#p 'l !5 !!d E 5 l 19i! d.5l!$iUi .5i!=3~iE 5is i ui! E' "- 5i EE i- Ei
!=i= : f"i:-is if'~y~.E- ~ EEi '.. ' "-- " ' ~~
i
" '~ ' ~~ * ' -' '
~" --
eT
~
0'09 l"55:i!E i "ii3 !!$iiii bil[:-Eii"d!!!!E~iE i !E = 5E
!Ei i.:1E 'i: iii ii%g"-"g[igfi un =- :: x= .u ar 3 0.08 Ez ;'Wg. syqay
- : ' 1.1. . ..~: : _.. ..
_ .:'. ..:2 T.
= if= . . .i3-. . .g. n=. ..n== =.-. { . is . . ..i. : = :iisi h 0.07 m:ii: r= : t=:t . s-ini p'" -
-== = '== = :' == j =
- n"'*- .: SURFACE: ::: ~"' ~s(Z-" ' ' ' "
=
Nikik: =' - - g' i CIE.ntuntun~E Ci. . . .
- t =
I H O*06 j nAWS IN NIS ih+n I h .< ; N! ~ Sb 7
=
9 :: REGION MUST BEjO":f
- =CONSIDERED ,n .
-~ijgi 3:..--
- r:,,
ij::-" g ii3 SURFACE [.hiid -:: : == n: :. .1af:i. ""ii2~n.E:" 0.05 H FLAWS '" r " '::
~
l "i :ii+:r m.;.. ; . /i d5' .n di-iiil!=i E!- Z 0'04
.!![ii iffi !! : 2" 5jk .ijii- !! l- =ii F -N ALL EMBEDDED FLAWS
..i
..- i.E.i. iiEjij i,(f:. E.E ;==;:- .i. -Ei
-- !!=
- =ir. ...
-- . i.iin.
. .'~
(ON THIS SIDE OF DEMARKATION LINE) I .~ ' " 0.03 5. !)N ARE ACCEPTABLE PER 5:f/ . . . - i =E :E ~ucuis l iiri' : == ' =i = E . . . .:-
...: un .:.. -
- =.su -
r
=rii!
n-CRITERIA OF IWB 3600 77I'
... a.
- l. 0.02 f T..'. I .5.?pn!'"~.g!!- AS LONG AS _2a 40.25 "a" . "Miii iidii ." : =i E : ..cr 1: :
Einui HE ErliF t 0.01 # M55 5 E" ! 'E # ' NI l if- Eils i Hiiii=" ql - 0 fJi fi !!!iE" "=i" !! zi;i -- 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (j) . l Figure A-2.7 Embedded Flaw Evaluation Chart for Longitudinal Flaws near the Inside Surface of the Tubesheet-Channel Head Junction (SGC-01) i l A-20
~
SURFACE / EMBEDDED FLAW DEMARCATION LINE O.13 ...~ m . . .... .. - . . Eiiii"lii ~ -': tiik5i Ei :i':EMBEDDED FLAWlE i b 8
' FLAWS WITH 0.12 i.n. . .i.E. i..:.:j
. . =. .
8
- 4. ...9.. u. 9. .* > ...i.:.:r .
CON, FIG.U..R A..TIO.m-m .. .N3 ggg Hg mana 7 uur . :. = .:= .: = .- = == == 3 ABOVE THIS LINE ARE
*.* .52::" 9 '? :.
'"' *u=
if .El .P 5 C Ja 5"?#.N:==*:13 .d " NOT ALLOWABLE
'*7E =iWE' isintE f.ir.=i=-- EEEilh;h OA1 m r .: "-
- E E Ef" "" * !!! D
~
!i iii ? 5 E J
.: 10 years EE Ei=
0.10 .gggi.
- E =
- ri Ei =. 1" riiW Ei==E EM ir"i k 20 years
=ig = ig gf.f.fii i g Ei 5ii=i: : i ' 30 years
- 0.09 [u5
- . .2 .
!i "E E 6 *I 5s a.:. n d,. ;;.
. 55 [5iii:5 5}5f= u.;; ,: n,
~i_~_~
1'.*'.I55. . .
- - . ,; .2 .. aru e l ., r:= :n. *: =r .. = .
._.. :=t.:n ::== =nn zu:=
g
""ig3..;: nn i:
5L um . .;pn=: - == . .:_. .: = ; :.= t= - - - - 3 0.08 :Z': : ' :. :"~:..:Z:.Z:. :::T :'
. :E n.. . .1:..
If 213~3= 35 i:iiEi! 33' EEdE E
': : M .N. .98,8 9898W =i! iii.~kH
.'i 5}iiidiilE ia. 35 I 5i5/55 !!$i!! $.551..'. Mi D.07 - . 1I5- * [ SURFACE.
h -- Ij .nt::::t:= EE[.:": "i E:.i-- :i$ "i?..i: i '=ilii iillE! Z S i!i[Ui 5 5:$ I - INi! l!$i; ~#- r 0.06 d FLAWS IN THISREoioN 3r s uuST eE n .,. u.i f~,jigg u.jn ;=: O
,. . --i,=3 iij-"
- CONSIDERED ' " - -
h g 0.05 diSURFACE H FLAWS
-[:::::T" lie i=:- i =E :Ti=!
~ ~ ~"
- E=:E;i8F
N I:~ a a.-t: m: = ,- fi . i=:5- ui :Fi-s E
= = }=-1:: -. 11 5:: - - i H=
4 GiE= : ii- .:. :E"-Z: ...: :"*s = .=: --Hji: W ALL EMBEDDED FLAWS
. dii---n, 2 0'04 "-- -- -- - - -
.iitsi i3= .a=. .i 9.: == (ON THIS SIDE OF
.j.-ifii ..':5:5"-
. =i: u- ..iai+ "Hj:i "y.1 _=
~~
=Jiis;~:' ~:J :"' .. M :.;; '- DEMARKATION LINE)
' "'"" 5:7 0.03 9 "2
'~
". I-..
ARE ACCEPTABLE PER i =5 r.! 5:/:i . u o.iii3= i= .: ==- =i rii) !=!=;=i CRITERIA OF IWB 3600 0.02 : AS LONG AS 2a 0.25
;;lij :::t ... t a : ene:= =jn.
nr =rntx. t 0.01
~
5 iN ~
~~ E
- f. . iilin: :- -i Ei: = g j- . .
- x. .
O b5 Y # IN ^ 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-2.8 Embedded Flaw Evaluation Chart for Circumferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) if t p A-21
~
SURFACE / EMBEDDED l FLAW DEMARCATION LINE 0.13 .. . . . .. .... . _ . , [ EEi.? .. f.!! iiii :ii EMBEDDED FLAW 5!!
'~
Tiii- IE . .... .. .
;: an
~' ' " '
q~ .w ~~***'" hgn .g:' ~CONFIGURATION 2-
~' ' ' ' ' ' ' " ' ' ' ' ~ ' ' ' ~ ~ ' ' '
' ' ' 'y .
O'M
~'
55Illi5i :5' *!55 M8E .. na M :-- ::ifli !555 5! 5! Ei% s 0.11 ::n== = . . . . : r: a= ...::1 : == :=ntgn .n. :-- -: - - - au.:
- c
- n: u: = .... :.=: =n =:na ....:=:- :: t:.
== n: m: = ..:
m =: :s ::::.n.an .= . ..:;a = = 20*F
* ' ~~'
'~* ; ' *# ' ""* ~ ~ ~ ' ' ' ~ ' ~ ' "
0
*iE.2ii. . .. i.n. :- ' ':' .' :"...i." ." ..: 0 f. E_ .i.i.E.5:i.:-: =. .
=-
~
- i
=. ;.
.. . . .. . '.'."Z [. .i.i.:M..J I
H !Ei V '-5 N5i!! ii 5! [5i 53 5i: -$:I: : $$ ;
- n s"j., ;i.n..:;E.
. ii.i.
. .n.i.i.,5z.. in_i.f.iE.r._J:i.
J . = . . . . - . . .:.=. .i.s...
.i.lt=._ _ . : _ 2:.:=.i..=.
3 0.08 5i:55' 3' Y EIhMM$ .i ..- ' .$ 5i :i!i-l'. !5 :I ii 52 _.'i Hea M
+... se.gan
=
- f. . .. .=is m . . .3:a=H= =
- =;.. E=-
3 iiEinjfM U"I . iii iE: iE : 'H .i"i ".i :iEl fiii'i..! ~:ii E
' SURFACE: : :g'jj/ii :"' .~ 12 :~
g . 0.07 lHi::'.
- -' ~- '--
g O '5I :IIi'II ::l=8" '-"*I -E*.::'.
"5" f ~E : 'iii+L~::~ -
. .: " ' ' . EE= ' IiiE~-
'.I"MI"~2I . ... . _ . _ .
.r- -- - -- ---
na.: .u- ==:..: == =:.. T .::. FLAWS IN THIS ** 3 f": . .: .= :r :
-~
- 71. : .": m: nr:-- =
F O*06 1 .-' O ?. REGIONEDMUST iiiCONSIDER BE' nu r
" f: ~
~'
"j=f
- n. . ..~
2'
~ "q; n" -
g filSUR FACE [.tiiE !=: i EIi~! Ii! EiEit.:: 53E' - g 0.05 H FLAWS . T: :~-
~~'
. . . . .: 7. ~ . 'Z~ '.
, iitt-M* -: m :--[!- i=r. =: iii-: i Ei! E!: 'E ..::l.E ' iii. . .hi.iI Ei
~
( =P . .: [='="I""a n : .=n '=: :." .:n=: -
- : =n "F ~ ~
~"~
I 0.04
;ilj.g Ejjjj ifii . :. :uiE n= .i -E: = : . -
.: -EF..:_ .i Hii -
illii=.ili/ :... ri Ei!EiJ
= r -
Ei!!!n ::=" i . 0.03 .. . . . .. El..-:t ".. .f.i:.. . .
= i!!IE=. . . - .Ex.:r-. - --
= :.:- n -
s3. ifi:;;; = = . - Ei_ ~~ - pp: igj.,n :-i 15 0.02 ,3 ;7ij .:
= hi ' El . i i Hi! . iiii i " it" =
0.01 !If" ~5 E ~
~
~: E:
. 5.EI'I:
=
El?= : 1 :: - .
=
. 1;i -}E ii:;E - [i .
0 - - - - 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-2.9 Test Tec:perature Detennination Chart for Longitudinal Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for both Secondary Hydro and Secondary Side Leak Test A-22
SURFACE / EMBEDDED FLAW DEMARCATION LINE O.13 .. . . .... .. .._
~~~
- =:=nr 9 IiE .. l-il .. i. ili!hEMBEDDED FLAW 5ib . E iigg g q gg.i.amap] CONFIGURATION :g:"..: ru 33.: . g.i_ :
0.12 :::::. . .2_.: . Z_.:.:.2._:.,.".. .Z . :Z ':2 :: e'" 200 F
~-
. . _-=aL ".." " "_.. :y.
". .* ~ ~;~
'p.:. ..
md.. 'r-e" : = = = ':g :. = p#"" =. .: --- "-- - - - r- - --
"~ '
#~ ~ ' # *~"i- '***
0 11 "3.5,". .;.i...rq
.;p<g' g."",,
. _ -. . = _ . .:a. .:.=.:.. .':
- 3
-l -
p .:= ,: ->..
.q ---
- 3. .._
. _ _ . .. . .. . . . .... ~ - ..
- . ..::= = : = . = . =-: :- r= a: .= n=: = =
- r. . . ..".: ".: m 7# 'g" "" ""
0.10 ! "En " " ~"- ' ' "
~
~~
"i.E.. . .._i=. . . i.
-i -
- ...2 2....[. 3 3'.7_ i.n.(.m..i.)
. . . _ ',"". . . .. . .m.._ . _!
-+
..: . ~
. J::
180 F
...: .=.. : -i; E. . . :. :di.
t
- n ;#-
i.:.=.4. .. : .., . . rP ._:. : E_i. -.. 1 f:.:. 4: :. 0.09 ._ . . . _ ..4 _ _ el i:i E::E: 'i 25 .i : ._ ...J.. :pOy!E, _ . nu .. _ . . ._"~. u-c.:i ::: :i:
- t=u.: ~==
~"
~ m-' =L.
us . .:ps r.:--
~""""'
= =: e"-' -- - #" _ - -
~ ~ ^
3: 0'08 1::5 M 49u.i4ap 5iMM !!# !!!!iMg""^jtisi !shi!. h 0.07 ai=: y=:SUR_F ACE : 1;"1
- Ei:.:-
- as:E: y:..' ".:ns si:..::::{=
- Z :."j(g[
-" "~~ " ""
Z': g : Z.~
' '"I: 9fE=t=8== ==#E=H d:.!: EE " !EE'E =
o EE 160 F I H O 06 WS IN MS h Mb i N I_N :rN [M
- REGION MUST BE : f.}y-5.. c
"==~. :=:.. . .:=. .= p# _u=
Q := CONSIDER ED 3-r-
~
2 == =~~'7" 7 ~~ -- h 5 SURFACE W [dii; Hilfi il " - E'i=ii!E i'
"' "* #i="~ ni E{nn . . #"'
0*05 "i :i! FLAWS - :.
=rm.# iiEir .. :iJc:!!=,ai'"#iT: :- ME='Mi I 0.04
~=
M:I!55 - M -- 5Ni* ~~
- !!!!E iMiiEfii{"MME#in isti#5AFE =" isf:!E~i =4
-ilii #.iif/ dii 5#"TH :. .i E==;: "'
li 0'03
-!Ei !!ifiV12MitEi diriEa t.mt; hi E'ik 5=i/WE E E
- ~
"T - -
- . i: !! EE !E: : -i Y!!(([-! !!E:: :[~: =- ! i5 5;- -: Ef: 5 -357" -- :
0'01 f E' * ~ i
- 5 E igi- -tiim: =-i.#ii 5= 'iTi ..l!! .
O b * 'ES i'I' 'I? ~
~~
0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-2.10 Test Temperature Detemination Chart for Circumferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Hydro Test A-23
~
190*F SURFACE / EMBEDDED FLAW DEMARCATION LINE O.13 .. .. . _. .... . . . .-. nn ::=::tr9 lii' .. dii - iii EMBEDDED FLAW 5!! [; ' - ! 22..- in
.ii.i. iijz. i.n. ,! 9. . ..-'$. ,8.9..9 .i...CONFIGU. R ATlON i:s.n. .i3f.E_.n.. .
33 _n. , . , .i.:. 0 12
;=r:li: =n: :r a:..t
= ant n =---- --
.- .. :rsa. a n::un = n=:.
y .. .
. . , .u_ na mit . . ,2r=..:-.=- runn :- : -.. : .-..
-E E d. ..:; F:N.. ...E H...D--# :==:.nd_H-...E9.E
( g 3$ E-=E
- ===
= .: . . . . .ai:
- n . :.-- : =r.
n :..:.:l :. n= n:-==
.= r: .n3 F. u..
=2: :
u_;-
. . . .. _ . . . ::t:=
=- n==: = n=' r : z.: :. .-----
0.1O ;';33
"_ y[ 'm
-s ._"""
#' =
;m
;;cx;;
,n a: anne = =
= ~ - - ~~ " --
.;..g; . =. . ,_;
=7 ,,,;7.,.;.=
. . , . ..,. ._.. .~. ..__ .
gg;gg;3g
. u , :: nr = na. an .p. ---- ~ + - - -
==._m.-- -- -
u - n b. n+ = :- - 0.09 ... _~. _ = . . .. _ - . .. . _. . . el ;iliL= iii- .. i iiE?!E pnJ.'
~
tn:+n 3 :3:: - 3: f 3gg .'z.
- g'
...: U---
- i. . . ..1iiiii=:m _-.:t
,; g an . :.-"
i=nn= ..'iiE
,y3:
3 0.08
- ' ' "- - -' ~ ~ ~
'1-'[h 9k,5 psqap i[ij jjjM,3 !! .T,; $[ u,M
- E l iii:'
g .'. . . ' U 't:N : n=n:if"il~~"= ngin CEiiE iH Ei fi ;: O*07 u..: . " ' ., _SunFACE' ""- "a" n=
~ '"~~ ~^' "-~ ~"{ii' 1 - -
.u~ ~ : ' z. '.'" : .- - - - -
- u. --
O : : =l" l=8 " "
===..:.= = .
i
'".~..# =.;.a$~n:.
g.. . . _ .. -
*i........k..=.=..
I p O.06 : iFLAWS IN THIS E3 97 r- = : -- - af:n: n: :n- .-
*# "~= =
n= :a . . = g CREGION MUST BE:f.
- CONSIDERED
.t
"~:. : "" ". . . . r'
. . . .a. . -.
Mr .~t z2 =
... =
g 5} SURFACE E " iFEE E ti- i -Mi :"~... - m 0.05 H FLAWS [:-li 7" ii!. "~ ~ 7:' ' Qi'
-*:-e/!
a !!! r e Enii ui nr: :E !il!"ixiil:9 '
! Ei! =
( = . .. _: 2- . - -- .- - --
-- :: .n _ nu: : = --
2 0.04 = "
= = - ' ~ ~
..'= = " ~"=:: '
( , ..i. E. . . i,f.i.i.j;i :25.i. iii:i. . i. .n.i.:.:iiE
=i.s.n o - . .
=
0.03 i:ni!{i/ :... .i .".7:. ::!ij .. .
-: 5 5 . .
K..g[ .jf l g jj;,[:. g \ g
-.{g 3 g g . ..
. {tgj'....
f 0.02 :i=-!/4si : i::E- Ei r ". . ilii isa;:in. .i E
~. ...".. ..= -.
_.1- E..j !=. in. . .- n .= n- i!:s !!E...:: :in : b -k bIk NE E 0.01 3 t
=. g n. =..!=.
- =n - :- :1.0 O
% E5 ' d' N - -
~
O O.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE h) Figure A-2.11 Test Temperature Detemination Chart for Circumferential Flaws near the Inside Surface of the Tubesheet Channel Head Junction (SGC-01) for Primary Side Leak Test l l A-24
A-3 TUBE SHEET-STUB BARREL WELD OF THE STEAM GENERNIUR (SGC-02) .A-3.1 SURFACE FLAWS The geometry and terminology for surface flaws at the tube sheet-stub barrel weld region of the steam generator is depicted in Figure A-3.1. The following parameters must be determined for surface flaw evaluation with the charts o Flawshapeparameter,f o Flaw depth parameter, "t-where a = The surface flaw depth detected (in.) L = The surface flaw length detected (in.) t = Wall thickness at the weld (t = 3.13") The surface flaw evaluation charts for this region are listed below Figure A-3.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Tubesheet - Stub Barrel Weld Figure A-3.3 Test Temperature Determination Chart for Circumferential Flaws at theInside Surface of the Tubesheet - Stub Barrel Weld for Secondary Hydro Test Figure A-3.4 Test Temperature Detennination Chart for Circumferential Flaws at the Inside Surface of the Tubesheet - Stub Barrel Weld for Secondary Leak Test A-25
l A.3-2 EMBEDDED FLAWS The geometrical description of an embedded flaw at in this region is depicted in Figure A-3.1. Basic Data: t = 3.13 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) i a = Flaw depth (deined as one half of the minor diameter) (in.) 1 = Flaw length (major diameter) (in.) a, = Maxinum embedded flaw size in depth direction, byond which it must be considered a surface flaw, per Section XI characterization rules. The following parameters must be calculated from the above dimensions to use the
- charts for evaluating the acceptability of an embedded flaw
o Flaw shape diameter,
~
, a o Flaw depth parameter, - s f o Surface proximity parameter, - l The evaluation chart for embedded flaws; The evaluation charts for embedded flaws in this region are listed below: o Figure A-3.5 Emoedded Flaw Evaluation Chart for circumferential 3 Flaws in the Tubesheet to Stub Barrel Weld Region (SGC-02). 1 ( o Figure A-3.6 Test Temperatures Determination Chart for Embedded l Circumferential Flaws in the Tubesheet Stub Barrel Weld for Secondary Hydro Test. l A-26
FIGURE A-3.1 Geometry and Terminology for Flaws at the Tubesheet - Stub Barrel (SGC-02) r-f
/ j l a a ,
/
SURFACE 8-FLAW AT Tubesheet O stub barrel __e ' (SGC-02) N / (inside) T . 3.13
~
s _ _- (1 EMBEDDED -i e Tubesheet-stub barrel FLAW AT , (SGC-02) Tubesheet i stub barrel l (inside) - 4 I-sNSW T .3.13 A-27
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o o.1 0.2 0.3 0.4 o.s Fl%W SHAPE (a//) l Figure A-3.4 Test Temperature Detennination Chart for Circumferential Flaws at the Inside Surface of the Tubesheet - Stub Barrel Weld for Secondary Leak Test i
SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13
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0 M ' I O 0.05 0.10 0.15 0.20 0.25 ! DISTANCE FROM SURFACE (f) Figure A-3.5 Embedded Flaw Evaluation Chart for circumferential Flaws in the Tubesheet to Stub Barrel Weld Region (SGC-02). A-31
l 1 l SURFACE / EMBEDDED
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FLAW DEMARCATION UNE 0.13 ..... . _.. ..... Ei-:!=F'il 9Hi.. b5! !!ii iii EMBEDDED FLAW El i [ ' ' ' ! *I'-
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Figure A-3.6 Test Temperatures Determination Chart for Embedded Circumferential Flaws in the Tubesheet Stub Barrel Weld for Secondary Hydro Test. 1 I A-32
A-4 Feedwat:r Nozzlo R;gion of the Ste m Gensrator (SGN-02) A 4.1 SURFACE FLAWS The geometry and terminology for surface flaws in the feedwater nozzle region is depicted in Figure A-4.1. The following parameters must be prepared for surface flaw evaluation charts o Flawshapeparameter,f o Flawdepthparameter,{ ! dhere l a = the surface flaw depth detected (in.) L = the surface flaw length detected (in.) t = wall thickness at the feedwater nozzle (t = 3.257") . The surface flaw evaluation charts for the feedwater nozzle are listed below Figure A-4.2 Surface Flaw Evaluatien Chart for Circumferential Flaws at the Inside Surface of the Feecwetar Nozzle 4 Figure A-4 3 Surface Flaw Evaluation Chart for Circumferential Flaws at the Outside Surface of the Feedwater Nozzle Figure A-4.4 Test Temperature Detemination Chart for Circtanferential Flaws at Both Inside and Outside Surfaces of the Feedwater Nozzle for the Secondary Hydro Test Figure A-4.5 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of Feedwater Nozzle for the Secondary Leak Test Figure A-4.6 Test Temperature Detemination Chart for Ciretsnferential Flaws at the Outside Surface of Feedwater Nozzle for Secondary Leak Test i A-33
A.4-2 EMBEDDED FLAWS j The gecmetrical description of an embedded flaw in the feedwater nozzle region is depicted in Figure A-4.1. Basic Data: t = 3.257 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (deined as one half of the minor diameter) (in.) L = Flaw 3ength (major diameter) (in.) a g= Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization rules. The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw o Flaw shape diameter, a{ o Flawdepthparameter,f 6 o Surface proximity parameter, T The evaluation chart for embedded flaws: Figure A-4.7 Embedded Flaw Evaluation Chart for Circunferential Flaws near the Inside Surface of the Feedwater Nozzle Figure A-4.8 Embedded Flaw Evaluation Chart for Circumferential Flaws near the ' Outside Surface of the Feedwater Nozzle A-34
Figura A-4.9 Test Temper:tura DLttrmination Chart for Circumferential Embedded Flaws in the Feedwater Nozzle for the Secondary Hydro Test Figure A-4.10 Test Temperature Determination Chart for Circumferential Embedded Flaws in the Feedwater Nozzle for Secondary Leak Test 1 t i .. i l 1 A-35
FIGURE A-4.1 Geometry and Terminology for Flaws at the Feedwater Nozzle Shell (SGN-02) A-L l / k u a / SURFACE a_
! FLAW AT I Feedwater C Nozzle shell (SGN-02)
T = 3.257
~
l s _ -- Feedwater nozzle-shell EMBEDDED - 4 e (SGN-02) FLAW AT Feedwater nozzle shell l i (SGN-02) g4 '
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I s N& l i c: _ - T . 3.257 i A-36
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NO ANALYTICALJUSTIFICATION IHi M i h WH h id i$ ill d ih ijit illi l , di: !:h b N d i:.l l [ M ENNN O, ~ i O 0.1 0.2 0.3 0.4 0.5 FLAW SHAPE (a//) Figure A-4.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Feedwater Nozzle i
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m. iB 9 !!!! !!!! !ill !!!! !!ii il!! 10 !!!! !!' i h" " H un i:ii ici ui. iii; iti; iii. ini im m up up gp iiii ee . 2 . g; 1n ;;j; ;j,j ;;;; j; ; 9; mi mi nu hk Hi 14 Oli ilIIYid d fif !!U 44 IIlliIIIII
;;; ; , ;;; j;i 01 iRi ilk $ $ lid i ! IP- 4 '- 11 0 ! ! lili i i NO ANALYTICALJUSTIFICATION
- 0. l!! ii! !!il ilii !iti liti Nii illi ilii ik iiO it;i i}ii ii i IiIi ill! liii O!b ! !! :.. il II[ . ili i p j IS REQUIRED O O.1 0.2 0.3 0.4 0.5 FIAW SHAPE (a//)
Figure A !I.3 Surface Flaw Evaluation Chart for Ciretnferential Flaws at the Outside Surface of the Feedwater Nozzle
180 F 160 F 20
!!!! !:li llt: !!il li' iDT- .i " tif' i :
!!' ' 1 : :
t it ::l . in"' fil! 111liti ij'Til i :!i. ? ' ' I!!! I ! ""
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- i!it ! llll Ll! ::- !:!! !!! ! ! -
l !!! !!!i l.l! l- li !!!i !!!! !!!! l::t i l' -i i i l,-- !! ! : iri: i.-i !!!! !!!! w l!l !!! i;i ;.I ll i lili !Ill11:l 41H 11 t il i; i Fi i i !! !! ! i! 2
!!.' !N!LIl !ll ill INI O i i i ..I II. } I!! j IIIt 1 i iij i, i j " d! !bi : -
I ! - i ll 3;; g; pj; i- ; ;.j, p; ;j;; ; ; ; ; ;
; jj; ,. ; j e ;; .
; ;; ; j .
o, i l! l i! !:li iL i i il i1 !ili ::ili 1.1 ;!!! o 0.1 0.2 i Lii 1111. i i c i ii i : ! 0.3
!l l 0.4 1 .
ilil( 0.s Fl%W SHAPE (a//) Figure A-4.4 Test Temperature Determination Chart for Ciretanferential Flaws at Both Inside and Outside Surfaces of the Feedwater Nozzle for the Secondary Hydro Test 1
i 120 F 20
!!U fil! !it: i fi if I fiit i *
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f ; l i g 34 iii :ii liiL 4 . H -
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l ! iiii ; i! Nj' "!!! H
! !:!! l- H- .i ! I illi ili i ) :l :ii il i- lli: -
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- .': ! l!Il !!! ! 'l I :
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IF l !} I:!.! ! .fi il! -l i i
- i!;i i- Ti !! I i: 1 !- H. ! .! 1 !! ! 1! Il!
@:lli !! ! !! !.11iil 1 ; i itii I- R! 11!: ! !! ;f fi ! ! Lu il i 11:- f!!i Mi !!+ ILil iti j'll :
i- -! J: t-W !. ! :! ui! ! : I:ll : di till i i ? l !U if- lli i ili illi fi i l l ! ! L
- 2. 3; ;;;; j;; ;;;; ;. , ; j; g j ; ;
}; ., j, .
jjj ) , j jj ;;- , i 0,. I i I ' o 0.1 0.2 0.3 o.4 o.s Fl>W SHAPE (a//) Figure A-4.5 Test Temperature Detennination chart for circumferential Flaws at the Inside Surface of Feedwater Nozzle for the Secondary Leak Test
180'F 160 F 140'F 20 if !! ! !tt t.i. Il ? !!!i l I M i:" t Pii t I:- ! Ill - 1: ill IIi . 7 II Il i3 ' Wf I' I' . . . 'i!-! 3" lil Illi li':1 i ll' !!!! E. I:l! -
!. II k i- -
1 Ii
!!4 iiii Li iii iG l 1; - ! Ll: i i ! !! !!! H! !!1 WT l!i l:- 1 il i 11 i i i is
- 0! i ji ::i iiiM !H l- !
- !.! L! I ! :.! ! O i!!IIN Uli il II' i Iil Illi i ii i Ii .
120 F
!!ti i:li iWi i !!- li:i !. I i ! !i.! Ifhett i ! I!-:1 I:li !!- i ii ;
i li i li til i -fiLlfi'
- 14 IN #II b! I ! II I III I INIII O f l I iIl III II I I I I I '
I ! ' Fh { gliii ;ii !!L! !!ll H I i ON3N Wi II ll b{ d b i i I II I MT i 1 ili !I ii
.. w
%II i- ! .
j ;[ ! i WITHIN THIS ZONE THE SURFACE
= 12 N iN t b I' I
N ! I' i 1; ' ' FLAW IS ACCEPTABLE SY CODE E . 111 Mfi 'll! i: I -:1i i - ili i 1HfI' i ji i !! - i
!! !- 1 ! -1 i ANALYTICAL CRITERIA (IWB 3600)
S' tl !H! h4 il li i IH 10. i ~i i l it . MV! ~i h i iai il ! !!- t ; : .! !: -
!I ! l i:1 i P sM I 4!! illi i'i ii r i. ih l!t :
e i ii i; ii i !!!. i H! L
. i 1 :
l- .i 1 -
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;;;; ; ,; ; gip 77 ii',init'fi4 I!!
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1
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i ! !
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,. :. q ;y j . CODE ALLOWABLE LIMIT pm ,,.,
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- iii lik ;!!! !c!! !!.! lil! !il .ili ! !! l I- Ull li i !! t. !!ii 41H:.li !!ii !il ?! 1 1!
i:-
- );i '!!!
l!! H!! !!!! Hl !!!! lili Hij if i i ti lli Ull if i !! I l!iv ini ir tiji i:1L l l !H - li 2 .g; g; j;ll ;jj; ;;;; ;jj; ;;;j ; ;; ; *
- .i ili ith .i !ill jii! !!!i i j !.l i I NO ANALYTICALJUSTIFICATION i@ N 1 .
! I li }
i!!! !!li titi liii !!!i !ili lii ili in! iiii 1 iiii Jih til: i 0, l!!i , j!!: sis.; I!!! 1 llj } liii i 'IS REQUIRED O O.1 0.2 0.3 0.4 0.5 FLAW SHAPE (a//) Figure A li.6 Test Temperature Determination Chart for Circumferential Flaws at the Outside Surface of Feedwater Nozzle for Secondary Leak Test l
SURFACE /EM8EDDED FLAW DEMARCATION LINE 0.13 10 years
.u;
= =nr
- .=
.x:== ur q. . . m. =
- . =--
,w u.l";.
n g .imap
. .-..._.~...:
n:EMSEDDED FLAW : r, .
.r
.=. =:
= "n- : /
' FLAWS WITH t-w
- C.ONFlou. R ATIO.N.
- 4-0.12 ge = = . . , .. : .. ,= .n an =: an :.
i. ABOVE THIS LINE ARE
- n. .:-: nu =3ja
- =- ::!a r: =-
.:. : AV n awn :h-n. : : :f. = a;:: ~
e un .: = = :. ._ ur ;.... .: = " - a=ug NOT ALLOWABLE 0.11 ...: = . :.
- / : r: = : :nn # = =-:=: ur~ . . .:re:--! k.
.a.=-:..n. =. : .: n.
.=_.
D. :.: . .=..n.
=..=
- . .. ..n.. . .f.a..=.=...
.e.a .=.n. n.e::-e.: . ..--
v.=.: 20 years tiii LO2~:yi Zi -*[ Mi, iif I' ;[3[j .:j - :u[:U; O!! :t-] 0.10 .. n.t... . ... ...-. . . . .a. az. :. ; ; ,
.'q,i'/.j((
= t.j.r. a . = : =: .. . . . 30 years
= . . ==n.;:t--
.: 2 ==.:.u
" ,. .' .. .=. . . _ .. . . .. .-.:
= . .=.
.L :.
-. = . _
.s . -"
- 8. .-
. y.. _ = .r.= n.-.'
. . . 0. :ru. . :. ndu.:.:. . :. ut. -:.
T
=
- ilii =- i-ii A ite*ii Fii iTl=-!= i .=i i*i 15i i5=ii! si i" l : : = . L: J'. : :..:n:: :- ; : = =:..: -=
.=..
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3 0.08 :---
. .=.. . . . . _ -=. . . .
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- .: #'n Ia. t .-.: = =Eu.
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Z. 0.06 ~:' FLAWS IN THIS 2iG f": = = :
-~ =-~ = = :"-
~-
e un :.x O ~.,
" ;" "~-.
REoioN uusi
;I CONSIDERED et 7: t' '" ' ~ ~
"-. . . . ~.. ~--.
g } SURFACE ! ii !=: i *i Ii i - iiE ' =
"; 0.05 -
FLAWS -[_ " . . .
/:.
- i.r: . :T' = = : ! Ei :i. i- -
j 0.04 [
~
" E N
- := ii" i.
f:~i .
=. : . ! =.
ini =i: . . . (ON THIS SIDE OF
.~. = i... .~ : E; .i- : DEMARKATION LINE) 5 :)
0.03 . . .! I .-. ARE ACCEPTABLE PER
.:f-L .:!!= iis ""-
= i-I r! u. :
=!
! ...ma : = - CRITERIA OF lWB 3600
;.:up:
;:= r: /: . .m .
=:n =
= x. r:: = :- _1. "AS LONG AS _2a 0.25 g' :..-
uu-
= : -
=. :
- . .. za . . .= un =:
- . . :. =
t 73 0a01 r . .. n.I l.=. ..l.... n::
- g=. :
I ti :p 4. - - 0 - 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f I Figure A 11.7 Embedded Flaw Evaluation Chart for Circumferential Flaws near the Inside Surface of the Feedwater Nozzle A-42
~
SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 . . .. .. . . . .. . . .. -. fiE!-Iiii i~ 'Eik.i, fi :. :fi EMSEDDED FLAWi:i b i 2. . . 2....~. . ,
' FLAWS WITH 8
.:=. .:
- = :: g.g g e,:p ::C,ON.F.I.G.U..RA.T.
, .. .. ION :"
r --- 0.12 Luni;; g g
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g,:: ~ "u ;.JJ. ;; :. :s ABOVE THIS LINE ARE
- C /J_ .: _ . . , _ . .. " . "JJ 2.
' NOT ALLOWABLE mi s :- :. ci!
- V :."' n': (.J : :Ein! ii
~M'..:di3: E E:In!hiM lME:!!
- E; Ci iE i!Eil 5i H~ni' I/!$i iig g x aj :iiig 10 years M IE i-Oi si :15 ii 5i :i
~
,!E !!E i 5 : =-
.: ii 20 years 0.10 enn
, .P #.;.../g"i! .. .. _ . . .- ..-
- :...=- -r. n. . .a.:nn
- --. .- = n=:-
/"
~
- c. f..: :-". ..
J 30 years r ;- "." = :s a: =:.=.:!=.c= 0 09
!= s ; = c in s :i . =! Es.2 4-
,i;g ,. . .;; g 3;;; ;;; 7;j gj ,;;; ;
,g ; g; g; ;;; ,
g ;: :: . . t a .:ar r- - -- -. -. - mugp;3-3 0.08 ": Z:
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"~
Mshgay si f. T. ..:i:
. ii
- .2 iid ;ri; 15 3 s! := si gr:" .= :g.h'T
~Ei i:::
tu i . . . . uni igi iig== 23;.ii:.; i :ig; jig 3;i :n En
-~' f":3 g 0.07 : surface: -: .: J: :' : : . :.1 . . . .:"' ' x . ..
O E IEE*=h- I:"' iEY E E E ~ * ~F~ i' - !*
% 0*06 pWS IN HIS h b :
~
5 5 Y
.. REGION MUST SE :f' :a."" :'" - ~ a: . :
O "# .c~
~
- q" CON SID E R ED -
g ilSURFACE : .! "i s i :' i!E "" [":di iff 0.05 t flaws
~
..a
' ~"
u, a ::::" *~ tn '"g .
-v- .u
'.i. ...:_ ;. -
- n: ---
- :, n:-....
4 I 0.04
- f.: i 5 5 i
- " i:= at --
M ALL EMBEDDED FLAWS u: = f:- .53= n= i ;;: is 15; .:. .
. (ON THIS SIDE OF
- / "~" ' . . ""
- == [ . : E:~: ~ -: -
DEMARKATION LINE) E 0.03 . . - .'T:' ARE ACCEPTABLE PER s
!.=i! Tf . .:. as e, == : .: . . . .n=: -- = -
s ti;H
..: =:
CRITERIA OF IWB 3600 0.02 S.E. 7 "" ru Z... I ". 7u .. AS LONG AS .2a.&O.25
.s
-R
- i. ;: == :- -
_ s au ;" t
- n-
~
~ ~ ""
0.01 . ....
- C' . .
0 / ' ' l' O O.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-4.8 Embedded Flaw Evaluation Chart for Circumferertial Flaws near the Outside Surface of the Feedwater Nozzle A-43 l
SURFACE / EMBEDDED 160 F FLAW DEMARCATION LINE 0.13 . . ._ . . _. . . . . . [ 9:' iidili t~
'iE
. . f-il .. :ihEMSEDDED FLAW E . . . . ..
- i l.ii.i. i ..,!
. . . %. .$ 8 P. .P. sp CON,FI.G,U..R.A..T.IO.N
. . . ~ . . ..
I'7= ..
. u.):g 140*F d55E 8 *:55 aP8i ::en:ag .--
2 Ol ifii 5NE EfiSISEi 0.11 5i! E '
- Isi"idi ismE- E 5 MEf 2
5 Ei Ei SP
.:= :::
-: =
~ ~ '
~'
~
~
..; iEiE/i!5ifi".
;n 7: ".' p;~'==. "
- .! . : = :u O*10 '" / '"
*ifr$i
- ~. 5 :=?' 31
!iE i:s:i h5d[@fii 5 Eisfill 5iEi u.:i V
~
0.09 iE i J J! ti I!
~
120 F eTw Ni 5 I!: .!!! Cii $ !!Nii!! k lij'- !5 i 5jNN?E :d ::: g 0.08
$ i'i =- 3 W ,.4e, @
;;s i.-qri; tn . . . . - .-.: g.i y;g = . :
ifiiu!!M i i:i! #= == :- 5 utini i g fili i..: :i: :;: ;
, 0.07 g
'~
- suRrAcE: .;.: : '
O
.r
- . 4. . 4. . . 4. . .--
m: N.A.:nz_:-n: -----= . . . . :::
- r.n r- :-.: -
I b O'06 jFes m ms :
' . REGION MUST SE :p 6 :..
Elf T:i
.(
da si~ + 9 .... TT "" '-
- f CONSIDERED
~
~ "
= ~
PT -
=
g 'i: SURFACE ii- Ei : [.iir r- ~ _ 'i tir - EiE : - 0.05 -" " ' ' m a 'i. FLAWS
;i : " m: .- ~[i 2.
' : iiii
- i
! Rii Ii! 5 E E!
~
" ~
2 0.04 ijiii ifi iiF !'" i;p i 9: - - -
;;_ ;i j :- -
0.03
' ~f
.i ..
.: Wi i= : .
- =
- =:
~~
-- F-X.-
. . -" ~_E-n- ". . .-. _ ,
=
0.02 5ii!!/i:! r Ei iTi lb .= : !!!
-_.: .:....- n ::_ .. =..::.:. :. 2:-
g _.. .... . .
= . . .: ._
. _ . . r.
- =
[ . _.
=
L'
~
~ .... .
- 0.01 . ..!. 9. "" ~"
/ - = :I- .l.i . . . .
0 Fii -
!!{:! ' j.: -
l 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-4.9 Test Temperature Determination Chart for Circumferential Embedded l Flaws in the Feedwater Nozzle for the Secondary Hydro Test l [ ! l t 1 l 1 l l l A-44 l
SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 . . ._ .. . . . . . . . EEE!=isii '~ IEki. di-EMBEDDED FLAWf!I: 2
+ E:
- ~ -'
q .
.ws).uaapa n:m :: ..
.:: CO.N. .F.IG.U..R.A..T.I.O..N..3
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- -~:-
. ;, . " . * .120'F
- n: ' .'.
55!!ii E i.3! Mk . aa [E!iE5: I/;i I5N!} 5*! 5 SE! i'[i:
~
0.11 Ei
.iEi=!
- i. 3li -ib. ds u!iii! /!!!!iil!53i !Eiini:i!
iiii ,
. . _. . .n._--. :.:. :.._ . .- E: a.::. . :. = _:1 . = . .=. : .:a-E.n._ ::. = . . .. ..:::::": n:::_. c:
- =.
- = ::::n:1 :: =: . --
. :. =- m.n::: :s :;r : r. : ::: .. : .. . .a u.: :n
- r. : :: :n p: --
- -nu a n- nn =
0.10 .=.. =.: - "._: II.... EE L= ... f/pifr". cii rdi !!Er.: = u=
.nica
- !!. . . i! -
- =. . :. n.:.:
. :r L :- .
- . - .-3
.=:: . [.: : .=. n. :: =.
~
c! . i.iii. fi..E.ji! a[w [Iii'
=: i di! ik 7EdTiiij.i !) ': '31 :di- !!ii 5 55 EiE 12.1 L J g9
. . :: ia: =: : == := :.. :
.= : --
;+- -
- =
- : ?----n; g - -,
,- _ : ; : ut:
. :e j (5paqap 5 ;j'~ 2: ij.- :rg @j! djj !!r :
5 ::i,-:
!!!:i:: LI ~-
!!E iiE 2
-li- iE. i ::El !!!i i..!?" i?
g 0.07 - [ SURFACE. rif":i-r - - - -
' .". I' :. .... ,- -.- g - g - - -::
1:: *: O - I- - - - - ---- -- - kZ O*06 MWS IN MS hREOlON MUST = .=a
.SE :f:=:'M" r = =u" Q
. :: CON SID E R E D sE : 2 "".... ~-
g 3 SURFACE iE n:.: i 'iii 'iz
!!)': - ii:i :..:
0.05 [:.:i . ~ ~ "' " ~ ~
-- fi : =.:". ."a H FLAWS b !- ~::):"-
.ii, - : -m -
.im uu ?! : i: fili! ==
4 , I 0.04 I. =. =" ""' ~ ~~"
= :~
Ei'ii ,#:i V . : =. . .
. u. :
. . ..i ,i: iEi ;Ei
. ..:: .: = . .::.. : nu m:.
0.03 ... s/
~
. :~..' an:t =
r -: -1:. .- - - "- m: - --- un : -~
; .g j ', . . . . . .- . . ..
..j .
~
O'02
' '" ~
j !f - !!r. : = !!n : Mi
- H: !!!! :isii -
"nf' n:- ::::
q":: ;
': ~ ..
~
~
~" "
0.01 ....
- }-
- n:: ,l:; .
in 0 g :' .
'::i ' l: '
0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-4.10 Test Temperature Determination Chart for Circumferential Embedded Flaws in the Feedwater Nozzle for Secondary Leak Test A-45
l A-5 STUB BARREL INTERMEDIATE SEAM WELD OF THE STEAM GENERATOR (SGC-03) A-5.1 SURFACE FLAWS The geometry and terminology for surface flaws in this region is depicted in Figure A-5.1. The following parameters must be prepared for surface flaw evaluation charts a o Flaw shape parameter, 7 a
, o Flaw depth parameter, t where a = the surface flaw depth detected (in.)
L = the surface flaw length detected (in.) t = wall thickness (t = 3.7") The surface flaw evaluation charts for this region are listed below Figure A-5.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Stub Barrel Intermediate Seam Weld (SGC-03) Figure A-5 3 Test Temperature Detennination Chart for Circumferential Flaws at the Inside Surface of the Stub Barrel Intermediate Seam Weld (SGC-03) for Secondary Hydro Test Figure A-5.4 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Stub Barrel Intermediate Seam Weld (SGC-03) for Secondary Side Leak Test A-46 l
A-5.2 EMBEDDED FLAWS-
'Ihe geometry and terminology for embedded flaws in this region is depicted in Figure A-5.1.
Basic Data: t = 3.70 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) ,
.- a = Flaw depth (deined as one half of the minor diameter) (in.)
L= Flaw length (major diameter) (in.) ag = Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization rules The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw o Flawshapediameter,f o Flaw depth parameter, *[ o Surfaceproximityparameter,f The evaluation chart for embedded flaws is found in Figure A-5.6. In view of Figure A-5.5, an embedded flaw in this figure will be acceptable r:gardless of its size, shape, and location, as long as { < 0.125 in Figure A-5.1. This determination can be made by plotting the indication parameters in the figure. If the plotted point falls below the diagonal line the indication is embedded, and is therefore acceptable. In addition to this chart, test temperature determination charts for both secondary hydro and leak tests have been provided. A-47
The cvaluation charts for embedd:d flaws are listsd below: Figure A-5.5 Embedded Flaw Evaluation Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intemediate seam (SGC-03) Figure A-5.6 Test Temperature Detemination Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intermediate Seam for Secondary Hydro Test Figure A-5.7 Test Temperature Detemination Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intennediate seam for Secondary Leak Test A-48
Figure A-5.1 Geometry and Terminology for Flaws at the Stub Barrel Intennediate Seam (SGC-03)
^
I L f
- ) U "
SURFACE = a_ FLAW AT Stub barrel, D intemediate _ q sea?
\ / *
(SGC-03) T = 3.70 ( i r.s i de) s _ _ _- Stub b C seam SGC-03) (arrel intermediate EMBEDDED '
- FLAW AT Stub barrel inte mediate l ,
(insid ) 5- -!
+8' m l T = 3.70 A-49
10 years 20 years
/_._30 years 20
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o' o.1 0.2 0.3 0.4 o.s FLAW SHAPE (a//) Figure A-5 3 Test Temperature Deterinination Chart for Ciretsnferential Flaws at the Inside Surface of the Stub Barrel Intermediate Seam Weld (SGC-03) for secondary Hydro Test
140 F 120 F 20 p p. j j .
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Figure A-5.4 Test Temperature Detennination Chart for Ciretznferential Flaws at the Inside Surface of the Stub Barrel Intermediate Seam Weld (SGC-03) for Secondary sin Leak Test
1 l l
' SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 . . .. .. .. .... .
Ci iinliii
. . . ... ~ <
'-T- Midii. ?! :l:i! EMBEDDED FLAW Fi[ 2 E..:= :
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=- r a :i=s =s g O.07 suFIE .
O !!Ei 'iIE"8=8 =2"i IIi"*i E' r!* *i 'i*" iEi- EIEi b 0.06 j...H.AWS I IN MS Mi blE 5 M.MN Y 0 REGION MUST BE-:fjn= = < .. ... = :. . . - - a: CONSIDERED - " ~"
- ~: : 2" = =-. . . . .' " -
"~=
g SSURFACE [". i:iE ini
-;"i E li= i -.' ~"EEi:.i?" = -
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= =~ " 35 Ei =
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- ALL EMBEDDED FLAWS
- iiL ii dis i: _:. IEmi iinpi:: .r..
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- "- 1 - -
ARE ACCEPTABLE PER CRITERlA OF IWB 3600 0.02 I:;: .j ... ..h'. .! . 5.!=: AS LONG AS 2a 40.25
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1! 'iTi - -- - 0 M 50 F " N O 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (j) Figure A-5.5 Embedded Flaw Evaluation Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intermediate seam (SGC-03) A-53 1
l i
~
SURFACE / EMBEDDED FLAW DEM ARCATION LINE
$IN!idi5 ;-5 i!E}.5! fE- iii EMBEDDED FLAW 5[' -H5 55 5i /
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. = _ . .._.. _..
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I. 0.06 !"J a.-..: p' =: g FLAWS IN THIS rr: :n r:- - n= =: : .:. F O . REoiON uusisEi +n= .. r . = :.. . . ~:'"'I~.
- aCONSIDERED # '"
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0 I 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE ( ) Figure A-5.6 Test Temperature Detemination Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intermediate Seam for Secondary Hydro Test A-54
SURFACE / EMBEDDED FLAW DEMARCATION UNE 55 555!!!- 5 NE}:5.'.!;i:li*i-EMsEDDED FLAW 5I ~" "iFi5 55=E 120'F
.. . : q ,p un-
= =.- := a.
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= A %,m: . _.
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g 0.07 . suR F AC E .: =._,.:n;...._=. . . . ,. - - = .. .. _ -
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=.- = un-
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Z .., FLAWS IN THIS
- 7 1:*J .n.-.:n = - f=-- - :- -: :f~n n :r -
= . -
- n s 0.06 un. . = :. . . .: =
=
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=
g ;il5URFACE [.injj@ i..j. ;*i Rii ]i i' 12 [if 0.05 d FLAWS i..J- " ". .".
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D :ii =** =h:r .n :i:-9?ilEi :El:. .?-12El. . .H' - - iri HE*": ( = . . .
= =...~ '~=:
= = = """'n
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=l:/.= :
=n === :. :n
=u- : . - . -
.: =
..= :=
0.03 : :. . - - .
- .= _ . :. n... :. . . . =...l.=... .::_=. :. = . . = . ..n- :,-.n. .e. n.: :.::. ....n :-
[3kI5i IIih
." 55N d55- N: E- -5 555 0.02 _... . .
k!".. .-. ' . . . . n : . ) ::.=. . .. . ..; : n n. =. :. n. . t n. ..= . .... =:. c._.... . =....=n. n:. . . .n 0.01 nf..: .. I n- = 5 51h~ nn. .l. =. :1 [ . F=E ' E O O d' Ii Y 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-5.7 Test Temperature Detemination Chart for Circumferential Embedded Flaws near the Inside Surface of the Stub Barrel Intemediate seam for Secondary Leak Test A-55
A-6 LOWER SHELL-CONE WELD OF THE STEAM GENERATOR (SGC-05) A-6.1 SURFACE FLAWS The geometry and terminology for surface flaws in the lower shell - cone weld region is depicted in Figure A-6.1. The following parameters must be prepared for surface flaw evaluation charts o Flawshapeparameter,{ o Flaw depth parameter, {
%here a = the surf ace flaw depth detected (in.)
L = the surface flaw length detected (in.) - t = wall thickness (t = 2.84") The surface flaw evaluation charts for this region are listed below: Figure A-6.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Lower Shell-Cone Weld of the Steam Generator (SGC-05) Figure A-6.3 Surface Flaw Evaluation Chart for Circumferential Flaws at Outside Surface of Lower Shell-Cone Weld of the Steam Generator (SGC-05). t Figure A-6.4 Test Temperature Determination Chart for Circunferential Flaws at I the Inside Surface of Lower Shell-Cone Weld of the Steam Generator i (SGC-05) for Secondary Hydro Test I l Figure A-6.5 TestTemperature Determination Chart for Circumferential Flaws at 1 the Outside Surface of Lower Shell-Cone Weld of the Steam Generator l l (SGC-05) for Secodary Hydro Test A-56
Figura A-6.6 Test Temperatura Detsmination Chart for Ciretanfcr nti:ltl Flawa et the Inside Surface of the Lower Shell-Cone Weld of the Steam Generator (SGC-05) for Secondary Leak Test Figure A-6.7 Test Temperature Detennination Chart for Cricumferential Flaws at the Outside Surface of the Lower Shell-Cone Weld of the Steam Generator (SGC-5) for Secondary Leak Test A-6.2 EMBEDDED FLAWS The geometry and terminology for embedded flaws in this region is depicted in Figure A-6.1. Basic Data: t = 2.64 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (deined as one half of the minor diameter) (in.) L= Flaw length (major diameter) (in.) ag = Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization rules. The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw o Flaw shape diameter, f o Flawdepthparameter,f 6 o Surface proximity parameter, I i l i A-57
The cvaluation ch rt for embedded flaws are found in Figure A-6.8. In view of Figure A-6.8, all embedded flaw which meet the criterion { < 0.125 will be acceptable regardless of their size, shape, and location. The embedded flaw evaluation charts for SGC-05 are listed below: Figure A-6.8 Embedded Flaw Evaluation Chart for Circumferential Flaws in the Lower Shell-Cone Weld of the Steam Generator (SGC-05) Figure A-6.9 Test Temperature Detamination Chart for Circumferential Flaws near the Inside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Hydro Test Figure A-6.10 Test Temperature Detamination Chart for Circumferential Flaws near the Outside Surface of the Leeer Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Hydro Test Figure A-6.11 Test Temperature Detamination Chart for Circumferential Flaws near the Inside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Leak Test Figure A-6.12 Test Temperature Detamination Chart for Circumferential Flaws near the Outside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Leak Test 4 A-58
FIGURE A-6.1 Geometry and Terminology for Flaws at Lower Shell-Cone Weld (SGC-05)
.A f
L ' O SURFACE
- a_
I FLAW AT Lower shell-cone (SGC-05) T= 2.84
\ [ _
Lower shell-cone (SGC-05) s_ : _ (1 EMBEDDED - i' FLAW AT Lower shell-cone (SGC-05) l , A7 TV Ii s- ,:
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1 .! 1 1 - i i:. IS REQUIRED o 0.1 0.2 0.3 o.4 o.s FI'AW SHAPE (a//) Figure A-6.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Lower Shell-Cone Weld of the Steam Generator (SGC-05)
10, 20, 30 years fl 11 5 ! !g ! tr i: it- ! j' "Il "I l! ! ! I! ! 'll 1 i is i ! IJ !! ! iiti i
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1: o 0.1 0.2 0.3 0.4 o.s Fl%W SHAPE (a//) Figure A-6.3 Surface Flaw Evaluation Chart for Circumferential Flaws at Outside Surface of Lower Shell-Cone Weld of the Steam Generator (SGC-05). 9
O
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20 . . . 1
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0 0.1 0.2 0.3 0.4 0.5 Fl%W SHAPE (a//) Figure A-6.6 Test Temperature Determination Chart for Circtanferential Flaws at the Inside Surface of the Lower Shell-Cone Weld of the Steam Generator (SGC-05) for Secondary Leak Test
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SURFACE / EMBEDDED FLAW DEMARCATION LINE O.13 .; = u. =; b..
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' FLAWS WITH t-
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nto. M ' " O O 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) l l l Figure A-6.8 Embedded Flaw Evaluation Chart for Circumferential Flaws in the l ! Lower Shell-Cone Weld of the Steam Generator (SGC-05) l 1 1 1 A-66 1 1
F SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 ..- ...--, EEii .iiiii-
"'~
iii
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if: . . .
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- - - -' R 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f)
Figure A-6.9 Test Temperature Detamination Chart for Circumferential Flaws near the Inside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Hydro Test l A-67
SURFACE / EMBEDDED 200o t FLAW DEMARCATION ' LINE - 0.13 ..- I Ei *._l' iEin: hip---^ii .. di';: - iih EMBEDbED FLAWN! [ -- i.i.i.i..E. . a:j M.....e3.3..9 .;: CONFIGURATION :p :..: =
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O O.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE () Figure A-6.10 Test Temperature Detamination Chart for Circumferential Flaws near the Outside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Hydro Test A-68
SURFACE / EMBEDDED 120'F FLAW DEMARCATION LINE 0.13 .. . _. .... .. iii EMSEDDED FLAW ii[ iMN!=. . _ *-
==nt: 25 lii.. kili tii . . . .l' Ep:. = . = . ..j .
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0.01 'i 'E "E E ff: Fil --i E "" ' :l l ..b :i!!! . . 0 M # d" 'I =h ~ j 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (j) 1 1 Figure A-6.11 Test Temperaturc Detamination Chart for Circumferential Flaws near the Inside Surface of the Lower Shell-Cone Weld of Steam Generator l (SGC-05) for secondary Leak Test A-69
~ SURFACE / EMBEDDED FLAW DEMARCATION 180*F LINE O.13 . . .. .. . . . ... . . . . .
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ifi illir - E .Li - 0 E-Ei-~ 'il i 55iE I N" O 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE ( ) Figure A-6.12 Test Temperature Detamination Chart for Circumferential Flaws near the Outside Surface of the Lower Shell-Cone Weld of Steam Generator (SGC-05) for Secondary Leak Test A-70
A-7 UPPER SHELL-CONE WELD OF THE STEAM GENERATOR (SGC-06) A-7.1 SURFACE FLAWS The geometry and terminology for surface flaws in this region is depicted in Figure A-7.1. The following parameters must be prepared for surface flaw evaluation charts o a Flaw shape parameter, g o Flawdepthparameter,k whera a = the surface flaw depth detected (in.) ( = the surface flaw length detected (in.) t = wall thickness (t = 3.70") The surface flaw evaluation charts for this region are is listed below Figure A-7.2 Surface Flaw Evaluation Chart for Circumferential Flaws at the Inside Surface of the Upper Shell-Cone Weld of the Steam Generator (SGC-06) Figure A-7.3 Test Temperature Determination Chart for Circumferential Flaws at the inside Outside Surface of the Upper Shell-Cone Weld of the Steam Generator (SGC-06) for Secondary Hydro Test Figure A-7.4 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Upper Shell-Cone Weld of the Steam Generator (SGC-06) for Secondary Leak Test A-71
4 A-7.2 EMBEDDED FLAWS The geometry and terminology for embedded flaws in this region is depicted in Figure A-7.1. Basic Data: t = 3.70 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (defined as one half of the minor diameter) (in.) L = Flaw length (major diameter) (in.) [ ag = Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization rules. The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw o Flaw shape diameter, f o Flawdepthparameter,f o Surfaceproximityparameter,f The evaluation charts for embedded flaus for the this region is listed below: Figure A-7.5 Embedded Flaw Evaluation Chart for Circumferential Flaws in the Upper Shell-Cone Weld of the Steam Generator (SGC-06) A-72
Figure A-7.6 Test Temperature Determ ation Chart for Circumferential Embedded Flaws in the Upper Shell-Cone Weld of the Steam Generator (SGC-06) for Secondary Hydro Test Figure A-7.7 Test Temperature Determination Chart for Circumferential Embedded Flaws in the Upper Shell-Cone Weld of the Steam Generator (SGC-06) for Secondary Leak Test A-73
Figure A-7.1 ( Geometry and Terminology br Flaws at Upper Shell Cone Weld of Steam Generator (SGC
,p- - ^
. L .;
SURFACE "P ' FLAW AT Upper shell-cone (SGC-06: C (inside)
\ !Uppershell-cone (SGC-06) !3
- _
l EMBEDDED i' (I FLAW AT Upper shell-cone (SGC-06) l ' (inside) I s y .;L . e~_. l T = 3.70 l A-74
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Figure A-7.2 Surface Flaw Evaluation Chart for Ciretsnferential Flaws at the Inside Surface of the Upper Shell-Cone Weld of the Steam Generator (SGC-06)
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0 0.1 0.2 0.3 0.4 0.5 FCAW SHAPE (a//) Figure A-7.li Test Temperature Determination Chart for Ciremferential Flaws at the Inside Surface of the Upper Shell-Cone Weld of the Ste m Generator (SGC-06) for Secondary Leak Test
' SURFACE / EMBEDDED FLAW DEMARCATION LINE l 0.13 . . .. ..
iE!:= iiE ....: ~:-
~
..Hik ..i Ei:i:I* EMBEDDED FLAW 5![ * ". . !E ME~?2 - S l
0.12 55 5 ird i$.N* ib NO. N. !!"-Ni59 1::. .; e13 l ' s}i gi;w .: : :;a ee . gsin_ni g";i u=;. ; = == ==: ABOVE THIS LINE ARE n JJ_ .
. . . ~:"* ., .; "" f r. JJ' n. NOT ALLOWABLE 0.11 E i 5 E "
m::s i :E . 7:I i#i !E!D EE MiiMiji-P i~: ;r" = === 5 55!Ei T s 10 years
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AR'i ACCEPTABLE PER CRITERIA OF IWB 3600 l 0.02 .f. =: AS LONG AS 2,ad,0.25 Efi:! . .'.i. .=1. @:- i = ': = = = . . .= :" n i ;i.i im=g: O.01 - E3-/ M "= iEi- ! i=:li! -
- = :- iE t
i f:! !!iH i HE !"I ~ fi : li O ' i 0 0.05 0 10 0.15 0.20 0.25 l DISTANCE FROM SURFACE (j) Figure A-7.5 Embedded Flaw Evaluation Chart for Circumferential Flaws in the Upper Shell-Cone Weld of the Steam Generator (SGC-06) A-78
220*F SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 .. . . . . . . _ . . . -..
=:=-rt: ---
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iJ i 0 0.05 0.10 0.15 0.20 0.25 l DISTANCE FROM SURFACE (f) i Figure A-7.6 Test Temperature Determination Chart for Circumferential Embedded 1 Flas in the Upper Shell-Cone Weld of the Steam Generator (SGC-06) for Secondary Hydro Test A-79
SURFACE / EMBEDDED FLAW DEMARCATION
. LINE 0.13 . .. .-
N.i d-iii
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- EIEii i ii i" 0 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f)
F Figure A-7.7 Test Temperature Determination Chart for Circumferential Embedded t, Flaws in the Upper Shell-Cone Weld of the Steam Generator (SGC-C6) for Secondary Leak Test A-80
A-8 UPPER SHELL-DOME WELD OF THE STEAM GENERATOR (SGC-08) A-8.1 SURFACE FLAWS The geometry and terminology for surface flaws in this region is depicted in Figure A-8.1. The following parameters must be prepared for surface flaw evaluation charts a o Flawshapeparameter,{ a o Flaw depth parameter, t whYre a = the surface flaw depth detected (in.) L = the surface flaw length detected (in.) . t = wall thickness (t = 3.70") Th2 surface flaw evaluation charts for the this region are listed below Figure A-8.2 Surface Flaw Evaluation Chart for Circumferential Flaws in the Upper Shell-Dome Weld of the Steam Generator (SGC-08) Figure A-8.3 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Upper Shell-Dome Weld of the Steam Generator (SGC-08) for Secondary Hydro Test Figure A-8.4 Test Temperature Determination Chart for Circumferential Flaws at the Outside Surface of the Upper Shell-Dome Weld of the Steam Generator (SGC-08) for Secondary Hydro Test A-81
Figure A-8.5 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface of the Upper Shell-Dome Weld of the Steam Generator (SCC-08) for Secondary Leak Test Figure A-8.6 Test Temperature Determination Chart for Cirutzferential Flaws at the Outside Surface of the Upper Shell-Dome Weld of the Steam Generator (SGC-08) for Secondary Leak Test A-8.2 EMBEDDED FLAWS The geometry and terminology for embedded flaws in this region is depicted in Figure A-8.1. o Basic Data: t = 3.70 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (deined as one half of the minor diameter) (in.) L = Flaw length (major diameter) (in.) ag = Maximum embedded flaw size in depth direction, beyoixi which it must be considered a surface flaw, per Section XI characterization rules. l The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw ' 4 o Flawshapediameter,f o Flawdepthparameter,f o Surfaceproximityparameter,f A-82
Evaluation charts for embedded f1tws cro listed below: Figure A-8.7 Embedded Flaw Evaluation Chart for Circumferential Flaws in the Upper Shell-Done Weld of the Steam Generator (SGC-08) Figure A-8.8 Test Temperature Detennination Chart for Circumferential Flaws at the Inside Surface of the Upper Shell-Dome Weld of the Steam Generator for the Secondary Hydro Test Figure A-8.9 Test Temperature Determination Chart for Circumferential Flaws at the Outside Surface of the Upper Shell-Dome Weld of Steam Generator for the Secondary Hydro Test Figure A-8.10 Test Temperature Determination Chart for Circumferential Flaws at the inside Surface of the Upper Shell-Dome Weld of the Steam Generator for the Secondary Leak Test Figure A-8.11 Test Temperature Determination Chart for Circumferential Flaws at the Outside Surface of the Upper Shell-Dome Weld of Steam Generator for the Secondary Leak Test A-83
FIGURE A-8.1 Geometry and Terminology for Flaws at Upper Shell Dome Weld of the Steam Generator (SGC-08) a-- I L
\'
SURFACE a_ I 3 ..U FLAW AT
'" " (pper shell-dome SGC-08) Upper shell dome (SGC-08) _
e T . 3.70 O
\ /
s_--
~
EMBEDDED FLAW AT -i l 0;;per snell (I dome (SGC-08) l , ! M7 d l S ,-! i
- +3' m i
M, T . 3.70 A-84
20 Fl [ tt
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ili !![ R 11))j!it Jjjj i!jj g .... l:1 ! j !! I g j{ NO ANALYTICALJUSTIFICATION g, IIII tiii Mi i ii; tiri !!!; !iii ;i iiii i idi iln hit iin jik ilt iii; d!! T , $ jIi !! ll $ i iiii i dj; IS REQUIRED o 0.1 0.2 0.3 0.4 o.s FLAW SHAPE (a//) Figure A-8.2 Surface Flaw Evaluation Chart for Circunferential Flaws in the lipper Shell-Dome Weld of the Steam Generator (SGC-08)
--m_ _____- -- - - _ - . - _ _ - . _ _ -
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O O.1 0.2 0.3 0.4 0.5 FCAW SHAPE (a//) Figure A-8.4 Test Temperature Determination Chart fcr Ciretaferential Flaws at the Outside Surface of the Upper Shell-Dome Weld of the Steam Generator (SGC-08) for Secondary Hyct o Test
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SURFACE / EMBEDDED FLAW DEMARCATION LINE 0.13 ..... .. ._. . ...
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Figure A-8.7 Embedded Flaw Evaluation Chart for Circumferential Flaws in the Upper Shell-Dome Weld of the Steam Generator (SGC-08) 1 A-90
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0 -- - O 0.05 0.10 0.15 0.20 0.25 DISTANCE FROM SURFACE (f) Figure A-8.10 Test Temperature Determination Chart for Cirrumferential Flaws at the inside Surface of the Upper Shell-Dome" Weld of the Steam Generator for the Secondary Leak Test A-93
SURFACE / EMBEDDED FLAW DEMARCATION LINE O.13 .. .. . .. 3E:;nnti 2 HH.. k!!:lidi Hb EMSEDDED FLAWii b~ -iMH . . - "E-i-
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A-9 LOWER MIDDLE SHELL LONGITUDINAL WELD OF THE PRESSURIZER (PLO2)
- A-9.1 SURFACE FLAWS The geometry and terminology for surface flaws in the region is depicted in Figure A-9.1.
The following parameters must be prepared for surface flaw evaluation charts a o Flaw shape parameter, t a o Flaw depth parameter, t t whera a = the surface flaw depth detected (in.) L = the surface flaw length detected (in.) t = wall thickness (t : 3 75") The surface flaw evaluation charts for this region are listed below: Figure A-9.2 Surface Flaw Evaluation Chart for Longitudinal Flaws the Inside Surface of the Lower Middle Shell Longitudinal Weld (PLO2) of the Pressurizer (Covered by Water Case) Figure A-9.3 Surface Flaw Evaluation Chart for Longitudinal Flaws at the Inside Surface of the Lower Middle Longitudinal Weld (PLO2) of the Pressurizer for (Uncovered by Water Case) Figure A-9.4 Test Temperature Determination Chart for Longitudinal Flaws at the Inside Surface of the Lower Middle Longitudinal Weld (PLO2) of the Pressurizer for Primary Hydro Test Figure A-9.5 Test Temperature Determination Chart for Circumferential Flaws at the Inside Surface cf the Lower Middle Shell Longitudinal Weld (PLO2) of the Pressurizer for Pr.imary Side Leak Test A-95 J
A-9.2 EMBEDDED FLAWS The geometry and terminology for embedded flaws is depicted in Figure A-9.1. Basic Data: t = 3.75 in. 6 = Distance of the centerline of the embedded flaw to the surface (in.) a = Flaw depth (deined as one half of the minor diameter) (in.) i t = Flaw length (major diameter) (in.) ag = Maximum embedded flaw size in depth direction, beyond which it must be considered a surface flaw, per Section XI characterization rules. a =g 5 /1.4 The following parameters must be calculated from the above dimensions to use the charts for evaluating the acceptability of an embedded flaw a o Flaw shape diameter, I o Flawdepthparameter,f o Surfaceproximityparameter,f Evaluation charts for embedded flaws at PLO2 are listed below: Figure A-9.6 Embedded Flaw Evaluation Chart for Longitudinal Flaws in the Lower Middle Shell Longitudinal Weld (PLO2) of the Pressurizer i I A-96
Figura A-9.7 T u t Temperature Det rminition Chart for Longitudinal Flaws in th2 Lowar Middle Shell Longitudinal Weld (PLO2) of the Pressurizer for Primary Hydro Test Figure A-9.8 Test Temperature Determination Chart for Circumferential Flaws in the Lower Middle Shell Longitudinal Weld (PLO2) of the Pressurizer for Primary Side Leak Test A-97
Figure A-9.1 Geometry and Terminology for Flaws at Lower Middle Shell Longitudinal Weid-(Pt02) ~ s-4 pg gg Upper Head to Upper shell held
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