L-PI-23-002, WCAP-18795-NP, Revision 0, Analysis of Capsule N from the Xcel Energy Prairie Island Unit 2 Reactor Vessel Radiation Surveillance Program, (Part 7 of 7)
| ML23075A352 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 12/31/2022 |
| From: | Benson R, Long M Northern States Power Company, Minnesota, Westinghouse, Xcel Energy |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML23075A344 | List: |
| References | |
| L-PI-23-002 WCAP-18795-NP, Rev 0 | |
| Download: ML23075A352 (1) | |
Text
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-147 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F)
-25 25 30 60 90 120 175 275 CVGraph 6.02 Material: SA508CL3 Capsule: N Capsule N Heat Affected Zone Charpy V-N otch Data Input %Shear Computed %Shear 20.0
- 16. 1 25.0 32.6 30.0 34.7 60.0 48.1 70.0 61.8 55.0 73.9 98.0 88.7 100 0
- 98. 1 11/08/2022 Heat: 22642 Fluence: 8.41E+019 n/cm2 Differential 3.93
-7.64
-4.71 11.87 8.17
-18.88 9.29 1.95 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-148 WCAP-18795-NP December 2022 Revision 0 Unirradiated Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/24/2022 4:57 PM A= 61.30 B = 59.10 C = 78.31 TO= 93.15 D = 0.00 Correlation Coefficient = 0.988 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf Energy = 120.40 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs= 47.00° F Temp@35 ft-lbs= 55.70° F Temp@50 ft-lbs= 78.00° F Plant: Prairie Island 2 Orientation: NA 140 120 100 r;,:i
~ -
I
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80
- 01) i..
~ =
~ 60 z >
u 40 Material: A533B1 Capsule: Unirrad Heat: HSST 02 Fluence: 0.00E+000 n/cm2 0....____.._.....__.....__....____._.....__.....__....____. __...... _....__...... _..._...... _....... _...... _....____.
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/24/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-149 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature {° F)
-50
-50
-50
-20
-20
-20 10 10 10 40 40 40 85 85 85 110 110 110 160 160 160 210 210 210 300 300 300 CVGraph 6.02 Material: A533Bl Capsule: Unirrad Heat: HSST 02 Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Input CVN Computed CVN Differential 5.0 5.2
-0. 18 5.0 5.2
-0.18 3.0 5.2
-2.18 6.5 84
-1.93 9.0 84 0.57 6.0 84
-243 12.0 14.8
-2.83 14.5 14.8
-0.33 135 14.8
-1.33 22.0 264
-4.39 36.0 264 9.61 35.0 264 8.61 58.5 55.2 3.32 41.5 55.2
-1368 52.0 55.2
-3.18 82.5 73.8 8.67 85.5
- 73. 8 11.67 63.5
- 73. 8
-10.33 108.5 1023 6.24 81.0 102.3
-21.26 109.0 1023 6.74 1170 114.7 2.29 115.0 114.7 0.29 121.0 1147 6.29 125.0 119.8 5.20 1175 119.8
-2.30 127 0 119.8 720 05/24/2022 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-150 WCAP-18795-NP December 2022 Revision 0 Capsule V Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Cmvc Printed on 5/25/2022 8:29 AM A= 52.00 B = 49.80 C = 63.61 TO= 200.63 D = 0.00 Correlation Coefficient = 0.990 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf Energy = 101.80 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs= 170.50° F Temp@35 ft-lbs=l 78. 10° F Temp@50 ft-lbs=l 98.10° F Plant: Prairie Island 2 Orientation: NA 120 r;,:i 80
~ -
I
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- 01) 60 i..
~ =
~
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40 u
Material: A533B1 Capsule: V Heat: HSST 02 Fluence: 5.98E+018 n/cm2 0....____.._.....__.....__....____._.....__.....__....____. __...... _....__...... _..._...... _....... _...... _....____.
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/25/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-151 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 70 140 175 210 210 250 300 350 CVGraph 6.02 Material A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-N otch Data lnputCVN Computed CVN 12.0 3.8 18.0 15.1 30.0 33.0 660 59.3 52.5 59.3 84.0 84.4 104.0 97.6 99.5 100.9 05/25/2022 Heat HSST 02 Fluence: 5.98E+018 n/cm2 Differential
- 8. 19 2.91
-2.95 6.72
-6.78
-0.40 6.39
-1.40 Page 2!2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-152 WCAP-18795-NP December 2022 Revision 0 Capsule T Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/25/2022 10:30 AM A = 44.95 B = 42. 75 C = 53.13 TO = 224.36 D = 0.00 Correlation Coefficient = 0.978 Equation is A + B * [Tanh((T-TO)/(C+D1))]
Upper Shelf Energy = 87. 70 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs=205.00° F Temp@35 ft-lbs=21 1.80° F Temp@50 ft-lbs=230.70° F Plant: Prairie Island 2 Orientation: NA r,;,.
.c -
I 4:::
Material: A533B1 Capsule: T Heat: HSST 02 Fluence: 1.10E+019 n/cm2
';: 50 1-----+----+----+-------,f----+-f----+----+-----+---~
0,f) -
a-=
~
z >
u 0....____._.....__....__...__....___,,_....__...... _...._ ___.__.....,_.....__...__....____._...... _...._____,
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/25/2022 Page 112
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-153 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 100 200 210 225 250 300 350 400 CVGraph 6.02 Material A533Bl Capsule: T Capsule T Correlation Monitor Material Charpy V-N otch Data lnputCVN Computed CVN 7.5 3.0 21.0 26.6 33.5 33.7 56.5 45.5 54.5 64.1 88.5 83.0 90.0 87.0 84.5 87.6 05/25/2022 Heat HSST 02 Fluence: 1.10E+019 n/cm2 Differential 4.52
-5.61
-0.17 1104
-9.61 5.49 3.05
-3.09 Page 2!2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-154 WCAP-18795-NP December 2022 Revision 0 Capsule R Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Cmvc Printed on 5/3 1/2022 6:41 AM A= 39.60 B = 37.40 C = 65.96 TO= 247.48 D = 0.00 Correlation Coefficient= 0.973 Equation is A+ B * [Tanh((T-T0)/(C+D1))]
Upper Shelf Energy = 77.00 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs=230.20° F Temp@35 ft-lbs=239.40° F Temp@50 ft-lbs=266.40° F Plant: Prairie Island 2 Orientation: NA
~
,.Q -
I
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Material: A533B1 Capsule: R Heat: HSST 02 Fluence: 4.11E+019 n/cm2
-;:: 50 1-----+-----+----+-------,f-----+---I--+----+----+---~
0Jl 1-,
~ =
~
z >
u 0....____._.....__....__.....__...____._....__...__..._ ____.....,_.....__.....__....____._...... _...._____.
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 05/31/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-155 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 150 225 225 250 250 300 350 450 CVGraph 6.02 Material A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-N otch Data lnputCVN Computed CVN 8.0 5.9 33.0 27.3 27.0 27.3 45.0 41.0 31.0 41.0 62.0 64.4 87 0 73.8 82.0 76.8 05/31/2022 Heat HSST 02 Fluence: 4.11E+019 n/cm2 Differential
- 2. 10 5.68
-0.32 3.97
-10.03
-2.36 13.20 5.16 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-156 WCAP-18795-NP December 2022 Revision 0 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/31/2022 10:54 AM A = 49.10 B = 46.90 C = 85.09 TO = 280.50 D = 0.00 Correlation Coefficient = 0.999 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf Energy = 96.00 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs=243.80° F Temp@35 ft-lbs=254.20° F Temp@50 ft-lbs=282.20° F Plant: Prairie Island 2 Orientation: NA Material: A533B1 Capsule: P Heat: HSST 02 Fluence: 4.27E+019 n/cm2 0....____.._.....__.....__....____._.....__.....__....____. __...... _....__...... _..._...... _....... _...... _....____.
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/3 1/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-157 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 0 25 50 72 150 275 350 425 CVGraph 6.02 Material A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-N otch Data lnputCVN Computed CVN 3.0 2.3 3.0 2.4 4.0 2.6 4.0 2.9 9.0 6.4 45.0 46.1 810 80.7 96.0 930 05/31/2022 Heat HSST 02 Fluence: 4.27E+019 n/cm2 Differential 0.67 0.57 1.39 111 2.63
-107 0.32 3.04 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-158 WCAP-18795-NP December 2022 Revision 0 Capsule N Correlation Monitor Material CV Graph 6.02: Hyperbolic Tangent Cmvc Printed on 7/12/2022 7: 16 AM A = 40.60 B = 38.40 C = 94.51 TO = 286.65 D = 0.00 Correlation Coefficient = 0.971 Equation is A + B
- LTanh((T-T0)/(C+DT))J Upper Shelf Energy = 79.00 (Fixed)
Lower Shelf Energy = 2.20 (Fixed)
Temp@30 ft-lbs=259.90° F Temp@35 ft-lbs=272.80° F Temp@50 ft-lbs=3 10.30° F Plant: Prairie Island 2 Orientation: NA
~
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Material: A533B1 Capsule: N Heat: HSST 02 Fluence: 8.41E+019 n/cm2 0
-;:: 50 1-----+----+----+------,f----+----+1'---+----+---~
0Jl 1-,
~ =
~
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u 0....____._.....__....__.....__...____._....__...__..._ ____.....,_.....__.....__....____._...... _...._____.
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 07/12/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-159 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 200 225 240 275 320 375 425 450 CVGraph 6.02 Material: SA533B1 Capsule: N Capsule N Correlation Monitor Material Charpy V-N otch Data lnputCVN Computed CVN 16.0 12.8 27.0 18.6 120 23.0 37.0 35.9 54.0 53.6 66.0 68.7 84.0 75.1 74.0 76.7 07/12/2022 Heat HSST 02 Fluence: 8.41E+019 n/cm2 Differential 3.22 841
-1105 111 0.38
-2.74 8.90
-2.65 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-160 WCAP-18795-NP December 2022 Revision 0 Unirradiated Correlation Monitor Material Plant: Prairie Island 2 Orientation: NA CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/24/2022 4:59 PM A = 43. 71 B = 42. 71 C = 84.07 TO = 76.44 D = 0.00 Correlation Coefficient = 0.992 Equation is A + B * [Tanh((T-TO)/(C+D1))]
Upper Shelf L.E. = 86.42 Lower Shelf L.E. = 1.00 (Fixed)
Temp@35 mils= 59.10° F Material: A533B1 Capsule: Unirrad Heat: HSST 02 Fluence: 0.00E+000 n/cm2 0 l:::::::::::i:::::::::::+/-::=:c::::::::JL_~...L....i...---1_.1....-.L....i...---1__j~.L__j_.....L----1._J
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 05/24/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-161 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature {° F)
-50
-50
-50
-20
-20
-20 10 10 10 40 40 40 85 85 85 110 110 110 160 160 160 210 210 210 300 300 300 CVGraph 6.02 Material: A533Bl Capsule: Unirrad Heat: HSST 02 Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Input L. E.
Computed L. E.
Differential 3.0 5.0
-2.02 5.0 5.0
-0.02 4.0 5.0
-1.02 6.0 8.8
-2.82 10.0 8.8 118 9.0 8.8 0.18 15.0 15.6
-0.58 14.0 15.6
-1.58 14.0 15.6
-158 23.0 26.3
-3.28 32.0 26.3 5.72 32.0 26.3 5.72 51.0 48.0 2.96 42.0 48.0
-6.04 45.0 48.0
-3.04 60.0 59.9 0.09 710 59.9 11.09 54.0 59.9
-5.91 720 76.1
-4.13 69.0 76.l
-7.13 79.0
- 76. l 2.87 84.0 83.0 1.00 88.0 83.0 5.00 87 0 83.0 4.00 870 86.0 1.00 83.0 86.0
-3.00 84.0 86.0
-2.00 05/24/2022 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-162 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 60
~ -*-8
._, 50
=
0 *-
~ =
~
Q. 40
~
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~
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~
~ 20 Capsule V Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Cmvc Printed on 5/25/2022 8:32 AM A= 36.11 B = 35.11 C = 112.42 TO= 210.29 D = 0.00 Correlation Coefficient = 0.994 Equation is A + B * [Tanh((T-TO)/(C+D1))]
Upper Shelf L.E. = 71.21 Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mils=206.80° F Material: A533B1 Capsule: V Heat: HSST 02 Fluence: 5.98E+018 n/cm2 o l=::::c::::::::+/-::=c::+/-::::::i=..L..1...--...L_j_---1.____i_L_..i.._..L....i...---1.----L._J
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 05/25/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-163 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 70 140 175 210 210 250 300 350 CVGraph 6.02 Material A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-N otch Data Input L. E.
Computed L. E.
7 0 6.3 16.0 16.6 26.0 25.4 40.0 36.0 32.0 36.0 47.0 48.0 610 59.4 65.0 65.8 05/25/2022 Heat HSST 02 Fluence: 5.98E+018 n/cm2 Differential 0.65
-0.63 0.56 3.98
-4.02
-102 1.62
-0.82 Page 2!2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-164 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 60
~ -*-8
._, 50
=
0 *-
~ =
~
Q. 40
~
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~
~ 20 Capsule T Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/25/2022 10:37 AM A = 39.24 B = 38.24 C = 63.30 TO = 229.26 D = 0.00 Correlation Coefficient = 0.965 Equation is A + B * [Tanh((T-TO)/(C+D1))]
Upper Shelf L.E. = 77.47 Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mils=222.30° F Material: A533B1 Capsule: T Heat: HSST 02 Fluence: 1.10E+019 n/cm2 0 l::::::::::i:::::+/-::::::t:~=::i:=::+/-::=t:::::J._.1....-.L....i...---1__j~.L__j_.....L----1._J
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 05/25/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-165 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 100 200 210 225 250 300 350 400 CVGraph 6.02 Material A533Bl Capsule: T Capsule T Correlation Monitor Material Charpy V-N otch Data Input L. E.
Computed L. E.
6.0 2.3 18.0 22.7 28.0 28.0 47.0 36.7 41.0 51.3 79.0 70.1 69.0
- 75. 8 79.0 77.1 05/25/2022 Heat HSST 02 Fluence: 1.10E+019 n/cm2 Differential 3.73
-4.72 0.05 10.33
-10.33 8.92
-6.82 1.87 Page 2!2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-166 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Capsule R Correlation Monitor Material CV Graph 6.02: Hyperbolic Tangent Cmvc Printed on 5/31/2022 7: 19 AM A= 32.11 B = 31.11 C = 71.34 TO= 244.03 D = 0.00 Correlation Coefficient = 0.940 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf L.E. = 63.23 Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mils=250.70° F Material: A533B1 Capsule: R Heat: HSST 02 Fluence: 4.11E+019 n/cm2 70,-----,---~,-----,------,,----,------r---M---,-----,-----,
60 0
r,;,.
50
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0 40 r,;,. =
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~
~ 30
~
I-;
~ -
~ 20
.:l o t:::::::c:::+/-:::::::I:~=::z::::=::+/-:=:c::::::L_.1....-.L....L...--1..----J1....-L...i.........L----1._J
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/31/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-167 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 150 225 225 250 250 300 350 450 CVGraph 6.02 Material A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-N otch Data Input L. E.
Computed L. E.
9.5 5.2 25.5 24.0 29.0 24.0 34.0 34.7 24.5 34.7 56.0 52.5 70.0 60.2 54.0 63.0 05/31/2022 Heat HSST 02 Fluence: 4.11E+019 n/cm2 Differential 4.34 1.50 5.00
-0.71
-10.21 3.50 9.81
-9.03 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-168 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 60
~ -*-8
._, 50
=
0 *-
~ =
~
Q. 40
~
~ -
~
30 aJ..
~
~ 20 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/31/2022 10:56 AM A= 38.51 B = 37.51 C = 109.90 TO= 270. 73 D = 0.00 Correlation Coefficient = 0.995 Equation is A + B * [Tanh((T-TO)/(C+D1))]
Upper Shelf L.E. = 76.02 Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mils=260.50° F Material: A533B1 Capsule: P Heat: HSST 02 Fluence: 4.27E+019 n/cm2 o 1::::::+/-::::::+/-:::::::::c:::+/-=t:~~~-L--L..i..._...L....i....._J____i__j_____,__J
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 05/3 1/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-169 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 0 25 50 72 150 275 350 425 CVGraph 6.02 Material A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-N otch Data Input L. E.
Computed L. E.
2.0 1.5 2.0 1.8 2.0 2.3 3.0 3.0 120 8.5 36.0 40.0 67.0 61.7 69.0 71.7 05/31/2022 Heat HSST 02 Fluence: 4.27E+019 n/cm2 Differential 0.46 0.15
-0.33 0.04 3.50
-3.97 5.32
-2.75 Page 2/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-170 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 60
~ -*-8
._, 50
=
0 *-
~ =
~
Q. 40
~
~ -
~
30 aJ..
~
~ 20 Capsule N Correlation Monitor Material CV Graph 6.02: Hyperbolic Tangent Cmvc Printed on 7/12/2022 7: 18 AM A= 36. 79 B = 35. 79 C = 158.23 TO = 338.45 D = 0.00 Correlation Coefficient = 0.965 Equation is A + B
- LTanh((T-TO)/(C+DT))J Upper Shelf L.E. = 72.57 Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mils=330.60° F Material: A533B1 Capsule: N Heat: HSST 02 Fluence: 8.41E+019 n/cm2 o l::::=+/-:=+/-=:::::c::::+/-::::::c::::t:l_J_____i____L___l__l__.i__l__..l_J_i......J
-300
-200
-100 0
100 200 300 400 500 600 Temperature (° F)
CV Graph 6.02 07/12/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-171 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 200 225 240 275 320 375 425 450 CVGraph 6.02 Material: SA533B1 Capsule: N Capsule N Correlation Monitor Material Charpy V-N otch Data Input L. E.
Computed L. E.
10.0 11.6 16.0 14.8 10.0 170 28.0 23.2 39.0 32.6 39.0 44.9 51.0 54.6 63.0 58.5 07/12/2022 Heat HSST 02 Fluence: 8.41E+019 n/cm2 Differential
-160 1.22
-7.01 4.84 6.37
-5.91
-3.62 4.47 Page 2/2
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Westinghouse Non-Proprietary Class 3 C-172 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 100
~
Unirradiated Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/24/2022 4:58 PM A= 50.00 B = 50.00 C = 100.78 TO= 85.68 D = 0.00 Correlation Coefficient = 0.992 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
Temperature at 50% Shear = 85.70 Material: A533B1 Capsule: Unirrad Heat: HSST 02 Fluence: 0.00E+000 n/cm2
~
60 ----+---+----+-----------------------
QJ
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- 00.
501------1----+------- ----+----1------+-----+----1
=
QJ CJ
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40 ----~---+----+--_,_........_ ___ 1----~---+--------
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-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 05/24/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-173 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature {° F)
-50
-50
-50
-20
-20
-20 10 10 10 40 40 40 85 85 85 110 110 110 160 160 160 210 210 210 300 300 300 CVGraph 6.02 Material: A533Bl Capsule: Unirrad Heat: HSST 02 Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear Differential 9.0 6.3 2.66 9.0 6.3 2.66 9.0 6.3 2.66 9.0 10.9
-1.94 no 10.9 206 n o 10.9 2.06 23.0 18.2 4.79 23.0 18.2 4.79 23.0 18.2 4.79 33.0 28.8 4.23 29.0 28.8 0.23 29.0 28.8 0.23 43.0 49.7
-6.66 41.0 49.7
-8.66 42.0 49.7
-7.66 58.0 61.8
-3.84 67 0 61.8 5.16 55.0 61.8
-6.84 84.0 81.4 2.62 85.0 81.4 3.62 870 81.4 5.62 98.0 92.2 5.82 98.0 92.2 5.82 100.0 92.2 7.82 100.0 98.6 1.40 1000 98.6 140 1000 98.6 140 05/24/2022 Page 2/2
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Westinghouse Non-Proprietary Class 3 C-174 WCAP-18795-NP December 2022 Revision 0 Capsule V Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Cmvc Printed on 5/25/2022 8:31 AM A = 50.00 B = 50.00 C = 89.99 TO = 197.36 D = 0.00 Correlation Coefficient = 0.984 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
Plant: Prairie Island 2 Orientation: NA
~
~
QJ
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- 00.
--=
QJ CJ
~
QJ
~
100 90
~
80 70
~
60 50 40 30 20
~
10 0
-300 CV Graph 6.02
-200
-100 Temperature at 50% Shear= 197.40 Material: A533B1 Capsule: V Heat: HSST 02 Fluence: 5.98E+018 n/cm2
~v
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I -J 7
I
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0 100 200 300 400 500 600 Temperature{° F) 05/25/2022 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-175 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 70 140 175 210 210 250 300 350 CVGraph 6.02 Material A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-N otch Data Input %Shear Computed %Shear 5.0 5.6 30.0 21.8 40.0 37.8 50.0 57.0 50.0 57.0 80.0 76.3 1000 90.7 100 0 96.7 05/25/2022 Heat HSST 02 Fluence: 5.98E+018 n/cm2 Differential
-0.57 8.15 2.17
-6.98
-6.98 3.69 9.27 3.25 Page 2!2
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Westinghouse Non-Proprietary Class 3 C-176 WCAP-18795-NP December 2022 Revision 0 Capsule T Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/25/2022 10:35 AM A = 50.00 B = 50.00 C = 54.48 TO = 229.00 D = 0.00 Correlation Coefficient = 0.986 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
Plant: Prairie Island 2 Orientation: NA
~
~
QJ
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- 00.
--=
QJ CJ
~
QJ
~
100 90
~
80 70
~
60 50 40 30 20
~
10 0
-300 CV Graph 6.02
-200
-100 Temperature at 50% Shear = 229.10 Material: A533B1 Capsule: T
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C)
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0 100 200 300 Temperature{° F) 05/25/2022
~..
Heat: HSST 02 Fluence: 1.10E+019 n/cm2 400 500 600 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-177 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 100 200 210 225 250 300 350 400 CVGraph 6.02 Material A533Bl Capsule: T Capsule T Correlation Monitor Material Charpy V-N otch Data Input %Shear Computed %Shear 14.0 0.9 25.0 25.6 30.0 33.2 53.0 46.3 62.0 68.4 100.0
- 93. 1 l000 98.8 1000 99.8 05/25/2022 Heat HSST 02 Fluence: 1.10E+019 n/cm2 Differential 13.13
-0.64
-3.24 6.66
-6.37 6.87 1.16 0.19 Page 2!2
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Westinghouse Non-Proprietary Class 3 C-178 WCAP-18795-NP December 2022 Revision 0 Capsule R Correlation Monitor Material CV Graph 6.02: Hyperbolic Tangent Cmvc Printed on 5/31/2022 7: 18 AM A = 50.00 B = 50.00 C = 55.42 TO = 242.87 D = 0.00 Correlation Coefficient = 0.980 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
Plant: Prairie Island 2 Orientation: NA
~
~
QJ
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- 00.
--=
QJ CJ
~
QJ
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100 90
~
80 70
~
60 50 40 30 20
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-300 CV Graph 6.02
-200
-100 Temperature at 50% Shear= 242.90 Material: A533B1 Capsule: R
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0 100 200 300 Temperature{° F) 05/3 1/2022 Heat: HSST 02 Fluence: 4.11E+019 n/cm2 400 500 600 Page 1/2
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 C-179 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 150 225 225 250 250 300 350 450 CVGraph 6.02 Material A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-N otch Data Input %Shear Computed %Shear 130 3.4 41.0 34.4 33.0 34.4 56.0 56.4 46.0 56.4 100.0 88.7 l000 97.9 l000 99.9 05/31/2022 Heat HSST 02 Fluence: 4.11E+019 n/cm2 Differential 9.62 6.59
-1.41
-0.40
-10.40 11.29 2.05 0.06 Page 2/2
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Westinghouse Non-Proprietary Class 3 C-180 WCAP-18795-NP December 2022 Revision 0 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 5/31/2022 10:55 AM A= 50.00 B = 50.00 C = 103.66 TO = 262.59 D = 0.00 Correlation Coefficient = 0.996 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
Plant: Prairie Island 2 Orientation: NA
~
~
QJ
.c
- 00.
--=
QJ CJ
~
QJ
~
100 90
~
80 70
~
60 50 40 30 20
~
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-300 CV Graph 6.02
-200
-100 Temperature at 50% Shear = 262.60 Material: A533B1 Capsule: P o/
~
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I L
I I
-7 I
0 100 200 300 Temperature{° F) 05/3 1/2022
/
Heat: HSST 02 Fluence: 4.27E+019 n/cm2
-v-400 500 600 Page 1/2
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Westinghouse Non-Proprietary Class 3 C-181 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F) 0 25 50 72 150 275 350 425 CVGraph 6.02 Material A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-N otch Data Input %Shear Computed %Shear 0.0 0.6 2.0 1.0 5.0 1.6 5.0 2.5 15.0 10.2 50.0 56.0 90.0 84.4 100 0 95.8 05/31/2022 Heat HSST 02 Fluence: 4.27E+019 n/cm2 Differential
-0.63 0.99 3.37 2.53 4.77
-5.96 5.62 4.17 Page 2/2
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Westinghouse Non-Proprietary Class 3 C-182 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA 100 90
~
80 70
~.
~
~
60 QJ
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- 00.
50
=
QJ CJ
~
40 QJ
~
30 20
~
10 Capsule N Heat Affected Zone CV Graph 6.02: Hyperbolic Tangent Cmvc Printed on 11/8/2022 9: 19 AM A = 50.00 B = 50.00 C = 107.69 TO = 64.02 D = 0.00 Correlation Coefficient = 0.944 Equation is A + B * [Tanh((T-T0)/(C+D1))]
Upper Shelf%Shear = 100.00 (Fixed)
Lower Shelf %Shear = 0.00 (Fixed)
~
/
Temperature at 50% Shear= 64.10
,.. J l
Material: SA508CL3 Capsule: N 0
/ I
-I
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"/ 0 I
L 1;
V Heat: 22642 Fluence: 8.41E+019 n/cm2 0
-300
-200
-100 0
100 200 300 400 500 600 Temperature{° F)
CV Graph 6.02 11/08/2022 Page 1/2
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Westinghouse Non-Proprietary Class 3 C-183 WCAP-18795-NP December 2022 Revision 0 Plant: Prairie Island 2 Orientation: NA Temperature (0 F)
-25 25 30 60 90 120 175 275 CVGraph 6.02 Material: SA508CL3 Capsule: N Capsule N Heat Affected Zone Charpy V-N otch Data Input %Shear Computed %Shear 20.0
- 16. 1 25.0 32.6 30.0 34.7 60.0 48.1 70.0 61.8 55.0 73.9 98.0 88.7 100 0
- 98. 1 11/08/2022 Heat: 22642 Fluence: 8.41E+019 n/cm2 Differential 3.93
-7.64
-4.71 11.87 8.17
-18.88 9.29 1.95 Page 2/2
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Westinghouse Non-Proprietary Class 3 D-1 WCAP-18795-NP December 2022 Revision 0 APPENDIX D PRAIRIE ISLAND UNIT 2 SURVEILLANCE PROGRAM CREDIBILITY EVALUATION D.1 INTRODUCTION Regulatory Guide 1.99, Revision 2 [D-1] describes general procedures acceptable to the NRC staff for calculating the effects of neutron radiation embrittlement of the low-alloy steels currently used for light-water-cooled reactor vessels. Positions 2.1 and 2.2 of Regulatory Guide 1.99, Revision 2, describe the method for calculating the adjusted reference temperature and Charpy upper-shelf energy of reactor vessel beltline materials using surveillance capsule data. The methods of Positions 2.1 and 2.2 can only be applied when two or more surveillance data sets become available from the reactor in question.
To date, there have been five surveillance capsules removed from the Prairie Island Unit 2 reactor vessel.
To use these surveillance data sets, the credibility must be determined. In accordance with Regulatory Guide 1.99, Revision 2, the credibility of the surveillance data will be judged based on five criteria.
The following subsections evaluate each of these five criteria for Prairie Island Unit 2 to determine the credibility of the surveillance data for use in neutron radiation embrittlement calculations.
D.2 EVALUATION Criterion 1: Materials in the capsules should be those judged most likely to be controlling with regard to radiation embrittlement.
The beltline region of the reactor vessel is defined in Appendix G to 10 CFR Part 50, Fracture Toughness Requirements [D-2], as follows:
the region of the reactor vessel (shell material including welds, heat affected zones, and plates or forgings) that directly surrounds the effective height of the active core and adjacent regions of the reactor vessel that are predicted to experience sufficient neutron radiation damage to be considered in the selection of the most limiting material with regard to radiation damage.
In addition, the Upper Shell Forging B and the Intermediate Shell Forging to Upper Shell Forging Weld Seam W2 will be considered to be part of the beltline region. Hence, the Prairie Island Unit 2 reactor vessel beltline region consists of the following materials:
- 1.
Upper Shell Forging B (Heat # 22231/39088)
- 2.
Intermediate Shell Forging C (Heat # 22829)
- 3.
Lower Shell Forging D (Heat # 22642)
- 4.
Upper Shell Forging B to Intermediate Shell Forging C Circumferential Weld Seam W2 (Weld Wire Type UM40/Heat # 1752, Flux Type UM 89/Lot # 1263)
- 5.
Intermediate Shell Forging C to Lower Shell Forging D Circumferential Weld Seam W3 (Weld Wire Type UM40/Heat # 2721, Flux Type UM 89/Lot # 1263)
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Westinghouse Non-Proprietary Class 3 D-2 WCAP-18795-NP December 2022 Revision 0 Per WCAP-8193 [D-3], the Prairie Island Unit 2 surveillance program was based on ASTM E185-70, Recommended Practice for Surveillance Tests for Nuclear Reactor Vessels. Per Section 3.1.2 of ASTM E185-70, A minimum test program shall consist of specimens taken from the following locations: (1) base metal of one heat, incorporated in the highest flux location of the reactor vessel, that has the highest initial ductile-brittle transition temperature, (2) weld metal fully representative of fabrication practice used for the welds in the highest flux location of the reactor vessel (weld wire or rod, and flux must come from one of the heats used in the highest flux region of the reactor vessel), and (3) the heat-affected zone of the weldments noted above.
It should be noted here that the Upper Shell Forging B and Weld Seam W2 were not considered when the surveillance program was developed. Therefore, at the time the Prairie Island Unit 2 surveillance capsule program was developed, Lower Shell Forging D (Heat # 22642) was judged to be most limiting. This was based on the fact that both the Intermediate Shell Forging C and Lower Shell Forging D initial RTNDT values were within 2°F of each other and Lower Shell Forging D had a lower USE value. As for the weld, the Prairie Island Unit 2 vessel has only one weld in the highest flux region (Weld Seam W3, Weld Control #
PS-011, Type UM40, Heat # 2721, Flux Type UM89, Flux Lot # 1263). The same weld was used in the surveillance program.
Therefore, the materials selected for use in the Prairie Island Unit 2 surveillance program were those judged to be most likely limiting with regard to radiation embrittlement according to the accepted methodology at the time the surveillance program was developed.
Based on the discussion, Criterion 1 is met for the Prairie Island Unit 2 surveillance program.
Criterion 2: Scatter in the plots of Charpy energy versus temperature for the irradiated and unirradiated conditions should be small enough to permit the determination of the 30 ft-lb temperature and upper-shelf energy unambiguously.
Based on engineering judgment, the scatter in the data presented in these plots, as documented in Section 5 and Appendix C, is small enough to permit the determination of the 30 ft-lb temperature and the upper-shelf energy of the Prairie Island Unit 2 surveillance materials unambiguously.
Hence, Criterion 2 is met for the Prairie Island Unit 2 surveillance program.
Criterion 3: When there are two or more sets of surveillance data from one reactor, the scatter of RTNDT values about a best-fit line drawn as described in Regulatory Position 2.1 normally should be less than 28°F for welds and 17°F for base metal. Even if the fluence range is large (two or more orders of magnitude), the scatter should not exceed twice those values. Even if the data fail this criterion for use in shift calculations, they may be credible for determining decrease in upper-shelf energy if the upper shelf can be clearly determined, following the definition given in ASTM E185-82 [D-4].
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 D-3 WCAP-18795-NP December 2022 Revision 0 The functional form of the least squares method as described in Regulatory Position 2.1 will be utilized to determine a best-fit line for this data and to determine if the scatter of these RTNDT values about this line is less than 28°F for welds and less than 17°F for the plate.
Following is the calculation of the best-fit line as described in Regulatory Position 2.1 of Regulatory Guide 1.99, Revision 2. The NRC methods were presented to the industry at a meeting held by the NRC on February 12 and 13, 1998 [D-5]. At this meeting the NRC presented five cases. Of the five cases, Case 1 (Surveillance Data Available from Plant but No Other Sources) most closely represents the situation for the Prairie Island Unit 2 Lower Shell Forging D (Heat # 22642) and the surveillance weld metal (Heat # 2721). It is noted that the Unit 2 Upper Shell Forging B to Intermediate Shell Forging C Circumferential Weld Seam W2 utilizes surveillance data for Heat # 1752 from the Prairie Island Unit 1 surveillance program, consistent with Case 5 (Surveillance data from other sources only); however, credibility of this data was evaluated in WCAP-18660-NP [D-87].
Evaluation of Data from Prairie Island Unit 2 Only (Case 1)
In accordance with the NRC Case 1 guidelines, the data from Prairie Island Unit 2 only will be evaluated.
Note that when evaluating the credibility of the surveillance weld data, the measured RTNDT values for the surveillance weld do not include the adjustment ratio procedure of Regulatory Guide 1.99, Rev. 2, Position 2.1, since this calculation is based on the actual surveillance weld measured shift values. In addition, only Prairie Island Unit 2 is being considered; therefore, no temperature adjustment is required.
Table D-1 contains the calculation of chemistry factors for the Prairie Island Unit 2 reactor vessel beltline materials contained in the surveillance program.
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Westinghouse Non-Proprietary Class 3 D-4 WCAP-18795-NP December 2022 Revision 0 Table D-1 Calculation of Interim Chemistry Factors for the Credibility Evaluation Using Prairie Island Unit 2 Surveillance Data Material Capsule Capsule Fluence(1)
(x 1019 n/cm2, E > 1.0 MeV)
FF(2)
RTNDT(3)
(°F)
FF*RTNDT
(°F)
FF2 Lower Shell Forging D (Heat # 22642)
(Tangential Orientation)
V 0.598 0.856 33.8 28.9 0.733 T
1.10 1.027 54.4 55.8 1.054 R
4.11 1.362 89.6 122.0 1.855 P
4.27 1.370 99.6 136.5 1.877 N
8.41 1.491 176.5 263.1 2.222 Lower Shell Forging D (Heat # 22642)
(Axial Orientation)
V 0.598 0.856 35.0 30.0 0.733 T
1.10 1.027 27.9 28.6 1.054 R
4.11 1.362 84.3 114.8 1.855 P
4.27 1.370 103.5 141.8 1.877 N
8.41 1.491 154.1 229.7 2.222 SUM:
1151.4 15.484 CFLS Forg. D = (FF
- RTNDT) ÷ (FF2) = (1151.4) ÷ (15.484) = 74.4°F Intermediate Shell to Lower Shell Circumferential Weld -
Seam W3 (Heat # 2721)
V 0.598 0.856 69.3 59.3 0.733 T
1.10 1.027 57.7 59.2 1.054 R
4.11 1.362 100.3 136.6 1.855 P
4.27 1.370 96.2 131.8 1.877 N
8.41 1.491 135.6 202.2 2.222 SUM:
589.1 7.742 CF Surv. Weld = (FF
- RTNDT) ÷ (FF2) = (589.1) ÷ (7.742) = 76.1°F Notes:
- 1.
Fluence taken from Table 6-1.
- 2.
FF = fluence factor = f(0.28 - 0.10*log (f)).
- 3.
RTNDT taken from Table 5-12.
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 D-5 WCAP-18795-NP December 2022 Revision 0 The scatter of RTNDT values about the functional form of a best-fit line drawn as described in Regulatory Position 2.1 is presented in Table D-2.
Table D-2 Best-Fit Evaluation For Prairie Island Unit 2 Surveillance Materials Only Material Capsule CF(1)
(Slopebest-fit)
(°F)
Capsule Fluence(2)
(x 1019 n/cm2, E >
1.0 MeV)
FF(3)
Measured RTNDT(4)
(°F)
Predicted RTNDT(5)
(°F)
Scatter RTNDT(6)
(°F)
<17°F (Base Metal)
<28°F (Weld)
Lower Shell Forging D (Heat # 22642)
(Tangential Orientation)
V 74.4 0.598 0.856 33.8 63.7 29.9 NO T
1.10 1.027 54.4 76.4 22.0 NO R
4.11 1.362 89.6 101.3 11.7 YES P
4.27 1.370 99.6 101.9 2.3 YES N
8.41 1.491 176.5 110.9 65.6 NO Lower Shell Forging D (Heat # 22642)
(Axial Orientation)
V 0.598 0.856 35.0 63.7 28.7 NO T
1.10 1.027 27.9 76.4 48.5 NO R
4.11 1.362 84.3 101.3 17.0 NO P
4.27 1.370 103.5 101.9 1.6 YES N
8.41 1.491 154.1 110.9 43.2 NO Intermediate Shell to Lower Shell Circumferential Weld -
Seam W3 (Heat # 2721)
V 76.1 0.598 0.856 69.3 65.1 4.2 YES T
1.10 1.027 57.7 78.1 20.4 YES R
4.11 1.362 100.3 103.6 3.3 YES P
4.27 1.370 96.2 104.3 8.1 YES N
8.41 1.491 135.6 113.4 22.2 YES Notes:
- 1.
CF calculated in Table D-1.
- 2.
Fluence taken from Table 6-1.
- 3.
FF = fluence factor = f(0.28 - 0.10*log (f)).
- 4.
Measured RTNDT taken from Table 5-12.
- 5.
- 6.
Scatter RTNDT = Absolute Value [Predicted RTNDT - Adjusted RTNDT].
The scatter of RTNDT values about the best-fit line, drawn as described in Regulatory Guide 1.99, Rev. 2, Position 2.1 should be less than 17°F for base metal and less than 28°F for weld metal. From a statistical point of view, +/-1 would be expected to encompass 68% of the data. Table D-2 indicates that three of the ten (30%) of surveillance data points fall inside the +/- 1 of 17F scatter band for surveillance base metal materials. All five (100%) of the surveillance data points fall inside the +/- 1 of 28F scatter band for the surveillance weld materials.
Therefore, the Lower Shell Forging D is deemed not-credible, while the Surveillance weld is deemed credible. Although Lower Shell Forging D did not meet Criterion 3, both materials may still be used in determining the upper-shelf energy decrease in accordance with Regulatory Guide 1.99, Revision 2, Position 2.2.
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 D-6 WCAP-18795-NP December 2022 Revision 0 Criterion 4: The irradiation temperature of the Charpy specimens in the capsule should match the vessel wall temperature at the cladding/base metal interface within +/- 25°F.
The Prairie Island Unit 2 capsule specimens are located in the reactor between the thermal shield and the vessel wall and are positioned opposite the center of the core. The test capsules are in baskets attached to the thermal shield. The location of the specimens with respect to the reactor vessel beltline provides assurance that the reactor vessel wall and the specimens experience equivalent operating conditions and will not differ by more than 25F.
The weld metal used in Weld Seam W2 is contained in the Unit 1 surveillance program. Both Prairie Island Unit 1 and Unit 2 operate at a similar temperature. Hence, the Unit 1 surveillance program weld metal was irradiated at a temperature within +/- 25°F of the Weld Seam W2 in Unit 2. Therefore, the Unit 1 surveillance weld will be used to project the fracture toughness properties of the Unit 2 Weld Seam W2.
Hence, Criterion 4 is met for the Prairie Island Unit 2 surveillance program.
Criterion 5: The surveillance data for the correlation monitor material in the capsule should fall within the scatter band of the database for that material.
The Prairie Island Unit 2 surveillance program does contain correlation monitor material, which was supplied by Oak Ridge National Laboratory from plate material used in the AEC-Sponsored Heavy Section Steel Technology (HSST) Program. This material was obtained from a 12-inch-thick A533, Grade B, Class 1 plate (HSST Plate 02), which was provided to Subcommittee II of ASTM Committee E10 on Radioisotopes and Radiation Effects to serve as correlation monitor material in reactor vessel surveillance programs. The plate was produced by the Lukens Steel Company and heat treated by Combustion Engineering, Inc.
NUREG/CR-6413, ORNL/TM-13133 [D-6] contains a plot of Residual vs. Fast Fluence for the HSST02 correlation monitor material (Figure 11 of the report). The Figure shows a 2 uncertainty of 50°F. The data used for this plot is contained in Tables 13, 14, and 15 (in the NUREG report). However, the data in the NUREG report does not consider the recalculated fluence values documented herein and also does not consider data pertaining to Capsule N. The table below presents an updated calculation of Residual vs. Fast Fluence for Prairie Island Unit 2.
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 D-7 WCAP-18795-NP December 2022 Revision 0 Table D-3 Calculation of Residual vs. Fast Fluence for Prairie Island Unit 2 Correlation Monitor Material Capsule Capsule Fluence (x 1019 n/cm2, E > 1.0 MeV)
FF Measured Shift (F)(1)
RG 1.99 Shift (F)(2)
Residual (F)(3) 2 Uncertainty Less Than 50F V
0.598 0.856 123.5 109.6 13.9 YES T
1.10 1.027 158.0 131.4 26.6 YES R
4.11 1.362 183.2 174.3 8.9 YES P
4.27 1.370 196.8 175.4 21.4 YES N
8.41 1.491 212.9 190.8 22.1 YES Notes:
- 1.
Measured T30 values for the correlation monitor material were taken from Table 5-12.
- 2.
Per NUREG/CR-6413, ORNL/TM-13133 [D-6], the Cu and Ni values for the correlation monitor material (HSST Plate
- 02) are 0.17 and 0.64, respectively. This equates to a chemistry factor value of 128F based on Regulatory Guide 1.99, Revision 2, Position 1.1 [D-1]. The calculated shift is thus equal to CF
- FF.
- 3.
Residual = Measured Shift - RG 1.99 Shift.
Table D-3 shows a 2 uncertainty of less than 50F, which is the allowable scatter in NUREG/CR-6413, ORNL/TM-13133 [D-6].
Hence, Criterion 5 is met for the Prairie Island Unit 2 surveillance program.
D.3 CONCLUSION Based on the preceding responses to the five criteria of Regulatory Guide 1.99, Rev. 2, Section B, the Prairie Island Unit 2 surveillance forging is deemed non-credible while the surveillance weld data are deemed credible.
- This record was final approved on 12/14/2022, 8:08:16 AM. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 D-8 WCAP-18795-NP December 2022 Revision 0 D.4 REFERENCES D-1 U.S. Nuclear Regulatory Commission, Office of Nuclear Regulatory Research, Regulatory Guide 1.99, Rev. 2, Radiation Embrittlement of Reactor Vessel Materials May 1988.
[ADAMS Accession Number ML003740284]
D-2 Code of Federal Regulations 10 CFR 50, Appendix G, Fracture Toughness Requirements, U.S.
Nuclear Regulatory Commission, Federal Register, November 29, 2019.
D-3 Westinghouse Report, WCAP-8193, Rev. 0, Northern States Power Co. Prairie Island Unit No. 2 Reactor Vessel Radiation Surveillance Program, September 1973.
D-4 ASTM E185-82, Standard Practice for Conducting Surveillance Tests for Light-Water Cooled Nuclear Power Reactor Vessels, American Society for Testing and Materials, 1982.
D-5 K. Wichman, M. Mitchell, and A. Hiser, USNRC, Generic Letter 92-01 and RPV Integrity Assessment, Status, Schedule, and Issues, NRC/Industry Workshop on RPV Integrity Issues, February 12, 1998. [ADAMS Accession Number ML110070570].
D-6 NUREG/CR-6413; ORNL/TM-13133, Analysis of the Irradiation Data for A302B and A533B Correlation Monitor Materials, J. A. Wang, Oak Ridge National Laboratory, Oak Ridge, TN, April 1996. [ADAMS Accession Number ML20112B397]
D-7 Westinghouse Report, WCAP-18660-NP, Rev. 0, Analysis of Capsule N from the Xcel Energy Prairie Island Unit 1 Reactor Vessel Radiation Surveillance Program, November 2021.