L-PI-22-005, WCAP-18660-NP, Revision 0, Analysis of Capsule N from the Xcel Energy Prairie Island Unit 1 Reactor Vessel Radiation Surveillance Program, Appendix C, Part 5 Through Appendix D

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WCAP-18660-NP, Revision 0, Analysis of Capsule N from the Xcel Energy Prairie Island Unit 1 Reactor Vessel Radiation Surveillance Program, Appendix C, Part 5 Through Appendix D
ML22067A155
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 11/30/2021
From: Benson R, Long M, Mays B
Westinghouse
To:
Office of Nuclear Reactor Regulation
Shared Package
ML22067A147 List:
References
L-PI-22-005 WCAP-18660-NP, Rev 0
Download: ML22067A155 (44)
v • d • e


Text

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-147 WCAP-18660-NP November 2021 Revision 0 Unirradiated Correlation Monitor Material CVGrnph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 l0:10 AM 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+DT))J 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 1 Orientation: NA 140 120 100 r;,:i

~ -

I

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80

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~ =

~ 60 z >

u 40 Material: A533B1 Capsule: Unirrad Heat: HSST 02 Fluence: 0.00E+000 n/cm' 0....____.._.....__.....__....____._.....__.....__....____. __...... _....__...... _..._...... _....... _...... _..._......

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-148 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 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: A533B1 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 3.0 5.2

-2.18 5.0 5.2

-0.18 5.0 5.2

-0.18 6.0 84

-243 6.5 84

-1.93 9.0 84 0.57 13.5 14.8

-1.33 120 14.8

-2.83 14.5 14.8

-0.33 35.0 264 8.61 220 264

-4.39 36.0 264 9.61 52.0 55.2

-3.18 58.5 55.2 3.32 41.5 55.2

-13.68 63.5 73.8

-10.33 82.5

73. 8 8.67 85.5 73.8 11.67 109.0 1023 6.74 108.5 1023 6.24 81.0 1023

-21.26 121.0 114.7 6.29 117.0 114.7 2.29 115.0 114.7 0.29 1270 119.8 7.20 125.0 119.8 5.20 1175 119.8

-230 06/29/2021 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-149 WCAP-18660-NP November 2021 Revision 0 Capsule V Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 8/5/2021 11 :44 AM A= 46. 75 B = 44.55 C = 97.80 TO= 187.52 D = 0.00 Correlation Coefficient = 0.952 Equation is A + B * [Tanh((T-T0)/(C+Dn)l Upper Shelf Energy = 91.30 (Fixed)

Lower Shelf Energy = 2.20 (Fixed)

Temp@30 ft-lbs= 148.90° F Temp@35 ft-lbs=l61.20° F Temp@50 ft-lbs=l 94.70° F Plant: Prairie Island 1 Orientation: NA 80 70 r;,:i

~ -

I 60

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01) 50 i..

~ =

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u 30 20 10 0

-300

-200 CV Graph 6.02

-100 Material: A533B1 Capsule: V 0

100 200 300 Temperature{° F) 08/05/2021 Heat: HSST 02 Fluence: 6.09E+018 n/cm' 400 500 600 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-150 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 75 150 175 210 250 275 300 350 CVGraph 6.02 Material A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-Notch Data lnputCVN Computed CVN 10.5 10.3 24.5 30.5 46.5 41.1 65.5 56.8 52.5 71.9 84.0 78.5 86.0 83.2 96.5 88.2 08/05/2021 Heat: HSST 02 Fluence: 6.09E+018 n/cm*

Differential

0. 19

-5.95 5.42 8.69

-1 9.38 5.46 2.82 8.30 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-151 WCAP-18660-NP November 2021 Revision 0 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 7:59 AM A= 43.50 B = 41.30 C = 40.83 TO= 221. 75 D = 0.00 Correlation Coefficient = 0.980 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf Energy = 84.80 (Fixed)

Lower Shelf Energy = 2.20 (Fixed)

Temp@30 ft-lbs=207.90° F Temp@35 ft-lbs=213.30° F Temp@50 ft-lbs=228.30° F Plant: Prairie Island 1 Orientation: NA r;,:i

~ -

I

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01) i..

~ =

~

z >

u 100 90 80 70 60 50 40 30 20 10 0

-300 CV Graph 6.02

-200

-100 Material: A533B1 Capsule: P D

C C)

/

I 0

t I

)

y 0

100 200 300 Temperature{° F) 06/29/2021 Heat: HSST 02 Fluence: 1.31E+019 n/cm' 0

400 500 600 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-152 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 125 200 210 225 250 300 350 425 CVGraph 6.02 Material: A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-Notch Data lnputCVN Computed CVN 9.0 2.9 25.0 23.4 28.0 31.9 49.5 46.8 67 0 68.2 87.5 83.0 73.5 84.6 93.5 84.8 06/29/2021 Heat: HSST 02 Fluence: 1.31E+019 n/cm*

Differential 6.08 1.63

-3.93 2.72

-1.25 4.45

-11.15 8.70 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-153 WCAP-18660-NP November 2021 Revision 0 Capsule R Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 8:21 AM A= 41.45 B = 39.25 C = 71.84 TO= 261.04 D = 0.00 Correlation Coefficient = 0.986 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf Energy = 80.70 (Fixed)

Lower Shelf Energy = 2.20 (Fixed)

Temp@30 ft-lbs=239.50° F Temp@35 ft-lbs=249.20° F Temp@50 ft-lbs=277.00° F Plant: Prairie Island 1 Orientation: NA Material: A533B1 Capsule: R Heat: HSST 02 Fluence: 4.02E+019 n/cm' 0....____.._.....__.....__....____._.....__.....__....____. __...... _....__...... _..._...... _....... _...... _..._......

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-154 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 225 250 300 350 375 425 CVGraph 6.02 Material: A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-Notch Data lnputCVN Computed CVN 9.0 5.6 10.0 14.3 30.0 23.3 31.0 35.5 62.0 60.9 720 74.6 79.0 77.5 91.0 79.9 06/29/2021 Heat: HSST 02 Fluence: 4.02E+019 n/cm*

Differential 3.39

-4.33 6.74

-4.47 1.13

-2.62 1.46 11.11 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-155 WCAP-18660-NP November 2021 Revision 0 Capsule S Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 8:45 AM A = 42.35 B = 40.15 C = 50.36 TO = 228.42 D = 0.00 Correlation Coefficient = 0.988 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf Energy = 82.50 (Fixed)

Lower Shelf Energy = 2.20 (Fixed)

Temp@30 ft-lbs=212.50° F Temp@35 ft-lbs=219.10° F Temp@50 ft-lbs=238.20° F Plant: Prairie Island 1 Orientation: NA

~

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I

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Material: A533B1 Capsule: S Heat: HSST 02 Fluence: 4.39E+019 n/cm'

-;:: 50 1-----+----+----+------,f----+-- --+----+----+---~

0Jl 1-,

~ =

~

z >

u 0....____._.....__....__.....__...____._....__...__...._ ____.....,_.....__.....__....____._...... _...._ __

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-156 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 206 225 250 300 350 400 CVGraph 6.02 Material: A533Bl Capsule: S Capsule S Correlation Monitor Material Charpy V-Notch Data lnputCVN Computed CVN 9.0 5.6 21.0 21.8 19.0 25.6 47.0 39.6 57 0 58.6 76.0 78.1 78.0 81.9 87 0 82.4 06/29/2021 Heat: HSST 02 Fluence: 4.39E+019 n/cm*

Differential 3.39

-0.83

-6.57 7.37

-157

-2.08

-3.86 4.59 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-157 WCAP-18660-NP November 2021 Revision 0 Capsule N Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/23/2021 7:29 AM A= 29.50 B = 27.30 C = 60.03 TO= 245.39 D = 0.00 Correlation Coefficient = 0.927 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf Energy = 56.80 (Fixed)

Lower Shelf Energy = 2.20 (Fixed)

Temp@30 ft-lbs=246.50° F Temp@35 ft-lbs=257.70° F Temp@50 ft-lbs=304.00° F Plant: Prairie Island 1 Orientation: NA 50 -

~

,.Q -

I

¢:: 40 -

0Jl 1-,

~ =

~ 30 z >

u 20 Material: A533B1 Capsule: N Heat: HSST 02 Fluence: 8.45E+019 n/cm' 0....____._.....__....__.....__...____._....__...__...._ ____.....,_.....__.....__....____._...... _...._ __

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/23/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-158 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 200 225 250 275 300 325 325 350 CVGraph 6.02 Material: A533Bl Capsule: N Capsule N Correlation Monitor Material Charpy V-Notch Data lnputCVN Computed CVN 130 12.l 23.0 20.6 29.8 31.6 38.0 42.0 52.0 49.2 63.0 53.2 42.0 53.2 65.5 55.2 06/23/2021 Heat: HSST 02 Fluence: 8.45E+019 n/cm*

Differential 0.94 2.43

-1.79

-3.97 2.82 9.79

-11.21 10.32 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-159 WCAP-18660-NP November 2021 Revision 0 Unirradiated Correlation Monitor Material Plant: Prairie Island 1 Orientation: NA CVGrnph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 10:12 AM 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-T0)/(C+DT))J 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/cm' o l:::::::::::i:::::::::::+/-::=:c::::::::JL_.i_...L....i...---1_.1....-.L....i...---1----J1....-L....i.........L----1._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-160 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 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: A533B1 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 4.0 5.0

-102 3.0 5.0

-2.02 5.0 5.0

-0.02 9.0 8.8 0.18 6.0 8.8

-2.82 10.0 8.8 1.18 14.0 15.6

-158 15.0 15.6

-0.58 14.0 15.6

-158 32.0 26.3 5.72 23.0 26.3

-3.28 32.0 26.3 5.72 45.0 48.0

-3.04 510 48.0 2.96 42.0 48.0

-6.04 54.0 59.9

-5.91 60.0 59.9 0.09 710 59.9 1109 79.0 76.1 2.87 720 76.l

-4.13 69.0 76.l

-7.13 870 83.0 4.00 84.0 83.0 100 88.0 83.0 5.00 84.0 86.0

-2.00 87 0 86.0 100 83.0 86.0

-3.00 06/29/2021 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-161 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA 60

~ -*-8

._, 50

=

0 *-

~ =

~

Q. 40

~

~ -

~

30 aJ..

~

~ 20 Capsule V Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 8/5/2021 11 :47 AM A= 40.53 B = 39.53 C = 114.94 TO= 208.81 D = 0.00 Correlation Coefficient = 0.976 Equation is A + B * [Tanh((T-TO)/(C+Dn)l Upper Shelf L.E. = 80.07 Lower Shelf L.E. = 1.00 (Fixed)

Temp'.@35 mils=192.70° F Material: A533B1 Capsule: V Heat: HSST 02 Fluence: 6.09E+018 n/cm' o l::==+/-::::::r::::=+/-:::::i:=-L~l---'----1.____i_L_..1...--..L....i....---1.----1._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 08/05/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-162 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 75 150 175 210 250 275 300 350 CVGraph 6.02 Material A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-Notch Data Input L. E.

Computed L. E.

2.0 8.0 18.0 21.9 36.0 29.2 47.0 40.9 46.0 54.1 59.0 61.1 68.0 66.6 76.0 73.8 08/05/2021 Heat: HSST 02 Fluence: 6.09E+018 n/cm*

Differential

-6.02

-390 6.77 6.06

-8. 13

-2.08 1.36

2. 17 Page 2/2
      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-163 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA

~ 50

-*-8

=

0 40

~ =

~

Q.

~

~ 30

~

aJ..

~ 20

~

Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/202 1 8:02 AM A= 30.86 B = 29.86 C = 44.01 TO= 211.17 D = 0.00 Correlation Coefficient = 0.954 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf L.E. = 60.72 Lower Shelf L.E. = 1.00 (Fixed)

Temp'.@35 mils=217.40° F Material: A533B1 Capsule: P Heat: HSST 02 Fluence: 1.31E+019 n/cm' o t::::::::::i::::::::+/-:::::::I:=::j=::i:::::::+/-::=i::::=:t:_.1....-.1-....i...--1..----J1....-L....i.........L----1._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-164 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 125 200 210 225 250 300 350 425 CVGraph 6.02 Material: A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-Notch Data Input L. E.

Computed L. E.

5.1 2.2 21.3 23.4 33.1 30.1 36.2 40.0 57.9 52.0 47.2 59.7 68.9 60.6 61.4 60.7 06/29/2021 Heat: HSST 02 Fluence: 1.31E+019 n/cm*

Differential 2.93

-2.14 3 03

-3.75 5.91

-1 2.49 8.29 0.68 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-165 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA 60

~ -*-8

._, 50

=

0 *-

~ =

~

Q. 40

~

~ -

~

30 aJ..

~

~ 20 Capsule R Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/202 1 8:24 AM A= 40.03 B = 39.03 C = 144.62 TO = 318.46 D = 0.00 Correlation Coefficient = 0.938 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf L.E. = 79.05 Lower Shelf L.E. = 1.00 (Fixed)

Temp'.@35 mils=299.80° F Material: A533B1 Capsule: R Heat: HSST 02 Fluence: 4.02E+019 n/cm' o l:::::::i:::::::+/-=::::c=+/-:::I:::r=..i._J_L--L..i..._...L....,___J___i__j_____,__J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-166 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 225 250 300 350 375 425 CVGraph 6.02 Material: A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-Notch Data Input L. E.

Computed L. E.

6.0 7.9 10.0 13.7 23.0

17. 8 18.0 22.8 41.0 35.1 56.0 48.4 39.0 54.6 70.0 64.5 06/29/2021 Heat: HSST 02 Fluence: 4.02E+019 n/cm*

Differential

-1.92

-3.70 5.19

-4.82 5.93 7.59

-1 5.55 5.50 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-167 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA

~ 50

-*-8

=

0 40

~ =

~

Q.

~

~ 30

~

aJ..

~ 20

~

Capsule S Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/202 1 9:09 AM A= 30.21 B = 29.21 C = 47.87 TO= 230.40 D = 0.00 Correlation Coefficient = 0.985 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf L.E. = 59.42 Lower Shelf L.E. = 1.00 (Fixed)

Temp'.@35 mils=238.40° F Material: A533B1 Capsule: S 0

Heat: HSST 02 Fluence: 4.39E+019 n/cm' o t::::::::::i::::::::+/-:::::::I:=::j=::i:::::::+/-::=:c::=t:=.._.1....-.L....i...---1----J1....-L....i.........L----1._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-168 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 206 225 250 300 350 400 CVGraph 6.02 Material: A533Bl Capsule: S Capsule S Correlation Monitor Material Charpy V-Notch Data Input L. E.

Computed L. E.

9.0 3.0 14.0 13.8 130 16.5 29.0 26.9 41.0 41.5 57.0 56.4 64.0 59.0 54.0 59.4 06/29/2021 Heat: HSST 02 Fluence: 4.39E+019 n/cm*

Differential 6.04 0.19

-3.49 2.07

-0.55 0.60 4.97

-5.37 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-169 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA

~ 50

-*-8

=

0 40

~ =

~

Q.

~

~ 30

~

aJ..

~ 20

~

Capsule N Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/23/2021 7:3 1 AM A= 35.58 B = 34.58 C = 101.38 TO = 291.36 D = 0.00 Correlation Coefficient = 0.967 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf L.E. = 70.15 Lower Shelf L.E. = 1.00 (Fixed)

Temp'.@35 mils=289.70° F Material: A533B1 Capsule: N Heat: HSST 02 Fluence: 8.45E+019 n/cm' o t:::::=+/-:::+/-::::::c:::=+/-==+/-=t=::=....L---'----1.____i_L_..1...--..L....i....---1.----1._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature (° F)

CV Graph 6.02 06/23/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-170 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 200 225 250 275 300 325 325 350 CVGraph 6.02 Material: A533Bl Capsule: N Capsule N Correlation Monitor Material Charpy V-Notch Data Input L. E.

Computed L. E.

10.0 10.8 16.0 15.7 24.0 22.2 260 30.0 44.0 38.5 50.0 46.6 39.0 46.6 55.0 53.6 06/23/2021 Heat: HSST 02 Fluence: 8.45E+019 n/cm*

Differential

-0.79 0.29 1.79

-4.05 5.48 3.35

-7.65 1.39 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-171 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA 100

~

Unirradiated Correlation Monitor Material CVGrnph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 l0:11 AM 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-TO)/(C+DT))J 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/cm'

~

60 ----+----+----+-------------------------

QJ

.c

00.

501------1----+------- ----+----1------+-----+----1

=

QJ CJ

~

40 ----~---+----1---,....."'"+----1----~---+----1----1

~

0 L-....1..-..,_=:c::;;_.1.........1.._..L........J.-..L...---L-..L...---L-...L..----I-....L...-L...-....L..-l..-...J

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-172 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 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: A533B1 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 n o 10.9 2.06 9.0 10.9

-1.94 no 10.9 2.06 23.0 18.2 4.79 23.0 18.2 4.79 21 0 18.2 4.79 29.0 28.8 0.23 33.0 28.8 4.23 29.0 28.8 0.23 42.0 49.7

-7.66 43.0 49.7

-6.66 41.0 49.7

-8.66 55.0 61.8

-6.84 58.0 61.8

-3.84 67 0 61.8 5.16 87 0 81.4 5.62 84.0 81.4 2.62 85.0 81.4 3.62 100.0 92.2 7.82 98.0 92.2 5.82 98.0 92.2 5.82 100.0 98.6 1.40 1000 98.6 140 1000 98.6 140 06/29/2021 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-173 WCAP-18660-NP November 2021 Revision 0 Capsule V Correlation Monitor Material CVGrnph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 11 :43 AM A= 50.00 B = 50.00 C = 101.77 TO= 217.13 D = 0.00 Correlation Coefficient = 0.960 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)

Lower Shelf %Shear = 0.00 (Fixed)

Plant: Prairie Island 1 Orientation: NA 100

~

Temperature at 50% Shear = 217.20 Material: A533B1 Capsule: V Heat: HSST 02 Fluence: 6.09E+018 n/cm'

~

60 ----+----+----+----+----+--+---+----+----+-----'I QJ

.c

00.

50 1----'---+---'--t-----'--+---+-----IE~-0--+----+---+--;__--I

=

QJ CJ

~

40 -----+----+---------- -----------------

~

0 L-....1...._J_...1.........J.--==:::::::C:=---.1...--...J....----J'---...I....----L-.J.........L._J.._....,___JL.,._....1...._J

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-174 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 75 150 175 210 250 275 300 350 CVGraph 6.02 Material: A533Bl Capsule: V Capsule V Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear 10.0 5.8 20.0 21.1 35.0 304 50.0 46.5 50.0 65.6 70.0 75.7 100.0 83.6 1000 93.2 06/29/2021 Heat: HSST 02 Fluence: 6.09E+018 n/cm*

Differential 4.23

-1 09 4.59 3.50

-1 5.61

-5.72 164 0 6.84 Page 2/2

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Westinghouse Non-Proprietary Class 3 C-175 WCAP-18660-NP November 2021 Revision 0 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 8:01 AM A = 50.00 B = 50.00 C = 63.99 TO = 221.33 D = 0.00 Correlation Coefficient = 0.988 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)

Lower Shelf %Shear= 0.00 (Fixed)

Plant: Prairie Island 1 Orientation: NA 100

~

Temperature at 50% Shear= 221.40 Material: A533B1 Capsule: P Heat: HSST 02 Fluence: 1.31E+019 n/cm'

~

60 ----+---+----+----+----+--+---+----+----+-----'I QJ

.c

00.

501------1----+----+--------+-11----1------+-----+----1

=

QJ CJ

~

40 -----+----+----------- ----------------

~

0 L..-....L.-..L....---JL...-....L..-..L..........&--=-.i.........1.-....L...-.I..-....L.-..L...-L...-....L..-..L..........&-....I

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-176 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 125 200 210 225 250 300 350 425 CVGraph 6.02 Material: A533Bl Capsule: P Capsule P Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear 9.0 4.7 38.0 33.9 34.0 41.2 58.0 52.9 65.0 710 100.0 92.1 l00.0 98.2 1000 99.8 06/29/2021 Heat: HSST 02 Fluence: 1.31E+019 n/cm*

Differential 4.31 4.08

-7.23 5.14

-6.01 7.88 1.76 0.17 Page 2/2

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Westinghouse Non-Proprietary Class 3 C-177 WCAP-18660-NP November 2021 Revision 0 Capsule R Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 8:22 AM A = 50.00 B = 50.00 C = 85.23 TO = 266. 78 D = 0.00 Correlation Coefficient = 0.979 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)

Lower Shelf %Shear = 0.00 (Fixed)

Plant: Prairie Island 1 Orientation: NA 100

~

Temperature at 50% Shear = 266.80 Material: A533B1 Capsule: R Heat: HSST 02 Fluence: 4.02E+019 n/cm'

~

60 ----+----+----+----+----+--------1---------------

QJ

.c

00.

501------1----+----+--------+---1--1------+-----+----1

=

QJ CJ

~

40 -----+----+-----------------------------

~

0 L-....L..-"--....L.-.l....--'--""'--llllllllli:=;.J..........1._..1....---1,_...1...___,1_....1...._1...-...J..._J..._...J

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-178 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 225 250 300 350 375 425 CVGraph 6.02 Material: A533Bl Capsule: R Capsule R Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear 130

6. 1 23.0 17.3 32.0 27.3 32.0 40.3 59.0 68.6 100.0 87.6 l00.0 92.7 1000 97.6 06/29/2021 Heat: HSST 02 Fluence: 4.02E+019 n/cm*

Differential 6.94 5.73 4.72

-8.28

-9.56 12.42 7.31 2.38 Page 2/2

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Westinghouse Non-Proprietary Class 3 C-179 WCAP-18660-NP November 2021 Revision 0 Capsule S Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 9:08 AM A = 50.00 B = 50.00 C = 68.29 TO = 249.86 D = 0.00 Correlation Coefficient = 0.991 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)

Lower Shelf %Shear= 0.00 (Fixed)

Plant: Prairie Island 1 Orientation: NA 100

~

Temperature at 50% Shear = 249.90 Material: A533B1 Capsule: S Heat: HSST 02 Fluence: 4.39E+019 n/cm'

~

60 ----+---+----+----+----+---+--+----+----+-----'I QJ

.c

00.

501------1----+----+--------+--t---1------+-----+----1

=

QJ CJ

~

40 -----+----+-----------------------------

~

0 L..-....L.-..L....---JL...-....L..-..L..........&----=..........1.-....L...-.I..-....L.-..L....-L...-....L..-..L..........&-....I

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/29/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-180 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 150 200 206 225 250 300 350 400 CVGraph 6.02 Material: A533Bl Capsule: S Capsule S Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear 15.0 5.1 20.0 18.8 15.0 21.7 30.0 32.6 55.0

50. 1 80.0 81.3 95.0 94.9 1000 98.8 06/29/2021 Heat: HSST 02 Fluence: 4.39E+019 n/cm*

Differential 9.90 1.16

-6.68

-2.56 4.90

-1.28 0.06 1.22 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-181 WCAP-18660-NP November 2021 Revision 0 Capsule N Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/23/2021 7:30 AM A= 50.00 B = 50.00 C = 67.63 TO= 267. 74 D = 0.00 Correlation Coefficient = 0.920 Equation is A + B * [Tanh((T-TO)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)

Lower Shelf %Shear = 0.00 (Fixed)

Plant: Prairie Island 1 Orientation: NA 100

~

Temperature at 50% Shear = 267.80 Material: A533B1 Capsule: N Heat: HSST 02 Fluence: 8.45E+019 n/cm'

~

60 ----+---+----+----+----+---

-+----+----+-----'I QJ

.c

00.

501------1----+----+--------+---+-l------+-----+----1

=

QJ CJ

~

40 t----:---t---,--+----,--+---+----+--1-H-+----+---,---+----,---t

~

0 L..-....L.-..L....---J.__....1.._..i....---1----ic;;;;......1._....i...._.i.,_....1._..i...._.__....1.,_..i....---1-....1

-300

-200

-100 0

100 200 300 400 500 600 Temperature{° F)

CV Graph 6.02 06/23/2021 Page 1/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 C-182 WCAP-18660-NP November 2021 Revision 0 Plant: Prairie Island 1 Orientation: NA Temperature (0 F) 200 225 250 275 300 325 325 350 CVGraph 6.02 Material: A533Bl Capsule: N Capsule N Correlation Monitor Material Charpy V-Notch Data Input %Shear Computed %Shear 20.0 11.9 35.0 22.0 35.0 37.2 40.0 554 55.0 72.2 100.0 84.5 100.0 84.5 1000 91.9 06/23/2021 Heat: HSST 02 Fluence: 8.45E+019 n/cm*

Differential

8. 11 12.97

-2. 18

-1 5.35

-1 7.19 15.53 15.53 8.07 Page 2/2

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-1 WCAP-18660-NP November 2021 Revision 0 APPENDIX D PRAIRIE ISLAND UNIT 1 SURVEILLANCE PROGRAM CREDIBILITY EVALUATION 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 1 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 1 to determine the credibility of the surveillance data for use in neutron radiation embrittlement calculations.

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.

However, based on a Request for Additional Information (RAI) that was received by Commonwealth Edison on the Byron Unit 1 pressure-temperature limits developed by Westinghouse, the Nozzle Shell Forging B and the Intermediate Shell Forging to Nozzle Shell Forging Weld Seam W2 will be considered to be part of the beltline region. Hence, the Prairie Island Unit 1 reactor vessel beltline region consists of the following materials:

1.

Nozzle Shell Forging B (Heat # 21744/38384)

2.

Intermediate Shell Forging C (Heat # 21918/38566)

3.

Lower Shell Forging D (Heat # 21887/38530)

4.

Nozzle Shell Forging B to Intermediate Shell Forging C Circumferential Weld Seam W2 (Weld Wire Type UM40/Heat # 2269, Flux Type UM 89/Lot # 1180)

5.

Intermediate Shell Forging C to Lower Shell Forging D Circumferential Weld Seam W3 (Weld Wire Type UM40/Heat # 1752, Flux Type UM 89/Lot # 1230)

D.1 D.2

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Westinghouse Non-Proprietary Class 3 D-2 WCAP-18660-NP November 2021 Revision 0 Per WCAP-8086 [D-3], the Prairie Island Unit 1 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 Nozzle Shell Forging B and Weld Seam W2 were not considered when the surveillance program was developed. Therefore, at the time the Prairie Island Unit 1 surveillance capsule program was developed, Intermediate Shell Forging C was judged to be most limiting based on the above recommendations and was utilized in the surveillance program. As for the weld, the Prairie Island Unit 1 vessel has only one weld in the highest flux region (Weld Seam W3, Weld Control # PS-011, Type UM40, Heat # 1752, Flux Type UM89, Flux Lot No. 1230). The same weld was used in the surveillance program.

Therefore, the materials selected for use in the Prairie Island Unit 1 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 1 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 1 surveillance materials unambiguously.

Hence, Criterion 2 is met for the Prairie Island Unit 1 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 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-3 WCAP-18660-NP November 2021 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. In addition, the recommended NRC methods for determining credibility will be followed.

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 1 surveillance weld metal and forging materials.

Evaluation of Data from Prairie Island Unit 1 Only (Case 1)

In accordance with the NRC Case 1 guidelines, the data from Prairie Island Unit 1 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 1 is being considered; therefore, no temperature adjustment is required.

Table D-1 contains the calculation of chemistry factors for the Prairie Island Unit 1 reactor vessel beltline materials contained in the surveillance program.

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-4 WCAP-18660-NP November 2021 Revision 0 Table D-1 Calculation of Interim Chemistry Factors for the Credibility Evaluation Using Prairie Island Unit 1 Surveillance Data Material Capsule Capsule Fluence(1)

(x 1019 n/cm2, E > 1.0 MeV)

FF(2)

RTNDT(3)

(°F)

FF*RTNDT

(°F)

FF2 Intermediate Shell Forging C (Tangential Orientation)

V 0.609 0.861 31.9 27.5 0.741 P

1.31 1.075 23.2 24.9 1.156 R

4.02 1.357 96.0 130.3 1.842 S

4.39 1.376 101.6 139.8 1.893 N

8.45 1.491 165.5 246.8 2.224 Intermediate Shell Forging C (Axial Orientation)

V 0.609 0.861 48.8 42.0 0.741 P

1.31 1.075 33.9 36.4 1.156 R

4.02 1.357 84.0 114.0 1.842 S

4.39 1.376 74.0 101.8 1.893 N

8.45 1.491 147.5 220.0 2.224 SUM:

1083.6 15.715 CFIS Forg C = (FF

  • RTNDT) ÷ (FF2) = (1083.6) ÷ (15.715) = 69.0°F Intermediate Shell to Lower Shell Circumferential Weld - Seam W3 (Heat # 1752)

V 0.609 0.861 35.2 30.3 0.741 P

1.31 1.075 45.6 49.0 1.156 R

4.02 1.357 123.0 166.9 1.842 S

4.39 1.376 161.0 221.5 1.893 N

8.45 1.491 219.0 326.6 2.224 SUM:

794.4 7.857 CF Surv. Weld = (FF

  • RTNDT) ÷ (FF2) = (794.4) ÷ (7.857) = 101.1°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 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-5 WCAP-18660-NP November 2021 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 1 Surveillance Materials Only Material Capsule CF(1)

(Slopebest-fit)

(°F)

Capsule Fluence(2)

(x 1019 n/cm2)

FF(3)

Measured RTNDT(4)

(°F)

Predicted RTNDT(5)

(°F)

Scatter RTNDT(6)

(°F)

<17°F (Base Metal)

<28°F (Weld)

Intermediate Shell Forging C (Tangential Orientation)

V 69.0 0.609 0.861 31.9 59.4 27.5 NO P

1.31 1.075 23.2 74.2 51.0 NO R

4.02 1.357 96.0 93.7 2.3 YES S

4.39 1.376 101.6 94.9 6.7 YES N

8.45 1.491 165.5 102.9 62.6 NO Intermediate Shell Forging C (Axial Orientation)

V 0.609 0.861 48.8 59.4 10.6 YES P

1.31 1.075 33.9 74.2 40.3 NO R

4.02 1.357 84.0 93.7 9.7 YES S

4.39 1.376 74.0 94.9 20.9 NO N

8.45 1.491 147.5 102.9 44.6 NO Intermediate Shell to Lower Shell Circumferential Weld - Seam W3 (Heat # 1752)

V 101.1 0.609 0.861 35.2 87.1 51.9 NO P

1.31 1.075 45.6 108.7 63.1 NO R

4.02 1.357 123.0 137.2 14.2 YES S

4.39 1.376 161.0 139.1 21.9 YES N

8.45 1.491 219.0 150.8 68.2 NO 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.

Predicted RTNDT = CF x FF.

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 six of the ten (60%) of surveillance data points fall outside the +/- 1 of 17F scatter band for surveillance base metal materials. In addition, three of the five (60%) of surveillance data points fall outside the +/- 1 of 28F scatter band for surveillance weld materials.

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-6 WCAP-18660-NP November 2021 Revision 0 Hence, Criterion 3 is not met for the Prairie Island Unit 1 surveillance program materials. However, the surveillance data may still be used in determining the upper-shelf energy decrease in accordance with Regulatory Guide 1.99, Revision 2, Position 2.2.

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 1 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.

Hence, Criterion 4 is met for the Prairie Island Unit 1 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 1 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 1.

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-7 WCAP-18660-NP November 2021 Revision 0 Table D-3 Calculation of Residual vs. Fast Fluence for Prairie Island Unit 1 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

0.609 0.861 101.9 110.2

-8.3 YES P

1.31 1.075 160.9 137.6 23.3 YES R

4.02 1.357 192.5 173.7 18.8 YES S

4.39 1.376 165.5 176.1

-10.6 YES N

8.45 1.491 199.5 190.9 8.6 YES Notes:

(a) Measured T30 values for the correlation monitor material were taken RTNDT taken from Table 5-12.

(b) 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

(c) 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 1 surveillance program.

CONCLUSION Based on the preceding responses to the five criteria of Regulatory Guide 1.99, Rev. 2, Section B, the Prairie Island Unit 1 surveillance plate and weld data are deemed non-credible.

D.3

      • This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 D-8 WCAP-18660-NP November 2021 Revision 0 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, December 12, 2013.

D-3 Westinghouse Report WCAP-8086, Rev. 0, Northern States Power Co. Prairie Island Unit No. 1 Reactor Vessel Radiation Surveillance Program, June 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 Workshop Handouts, 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 Date for A302B and A533B Correlation Monitor Materials, J. A. Wang, Oak Ridge National Laboratory, Oak Ridge, TN, April 1996. [ADAMS Accession Number ML20112B397]

D.4

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