View source for 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

{{Adams
| number = ML22067A155
| issue date = 11/30/2021
| title = 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
| author name = Benson R, Long M, Mays B
| author affiliation = Westinghouse Electric Co, LLC
| addressee name = 
| addressee affiliation = NRC/NRR
| docket = 05000282, 05000306
| license number = DPR-042
| contact person = 
| case reference number = L-PI-22-005
| document report number = WCAP-18660-NP, Rev 0
| package number = ML22067A147
| document type = Graphics incl Charts and Tables, Topical Report
| page count = 44
}}

=Text=
{{#Wiki_filter:Westinghouse Non-Proprietary Class 3                                                    C-147 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@3 0 ft-lbs= 47.00&deg; F               Temp@35 ft-lbs= 55.70&deg; F                    Temp@50 ft-lbs= 78.00&deg; F Plant: Prairie Island 1                                   Material: A533B1                                            Heat: HSST 02 Orientation: NA                                           Capsule: Unirrad                                 Fluence: 0.00E+000 n/cm' 140 120
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               -300         -200         -100          0            100           200          300          400          500         600 Temperature{&deg; F)
CVGraph 6.02                                                 06/29/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                                 November 2021 Revision 0
       *** 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 Plant: Prairie Island 1                               Material: A533B1                                      Heat: HSST 02 Orientation: NA                                       Capsule: Unirrad                          Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Temperature {&deg; F)                 Input CVN                    Computed CVN                  Differential
                   -5 0                           3. 0                         5.2                        -2.18
                   -50                            5.0                          5.2                        -0.18
                   -50                            5.0                          5.2                        -0.18
                   -20                            6.0                          84                         -243
                   -20                            6.5                          84                         -1.93
                   -20                            9.0                          84                          0.57 10                          13.5                         14.8                         -1.33 10                          120                          14.8                         -2.83 10                          14. 5                        14. 8                        -0.33 40                          35.0                         264                           8.6 1 40                          220                          264                          -4.39 40                          36.0                         264                           9.6 1 85                          52.0                         55.2                         -3 .18 85                          58.5                         55.2                          3.32 85                          41.5                         55.2                        -13.68 11 0                         63.5                         73.8                        -10.33 11 0                         82.5                         73. 8                         8.67 11 0                         85.5                         73.8                         11.67 160                         109.0                        1023                           6.74 160                         108.5                        1023                           6.24 160                          81.0                        1023                         -21.26 210                          121.0                        114.7                          6.29 210                          117. 0                       114.7                          2.29 210                          11 5.0                       114.7                          0.29 300                          1270                         119.8                          7.20 300                          125.0                        11 9.8                         5.20 300                          117 5                        11 9.8                        -230 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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&deg; F                 Temp@35 ft-lbs=l61.20&deg; F                  Temp@50 ft-lbs= l 94.70&deg; F Plant: Prairie Island 1                                   Material: A533B1                                            Heat: HSST 02 Orientation: NA                                              Capsule: V                                    Fluence: 6.09E+018 n/cm' 80
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               -300         -200        -100            0           100           200          300          400          500         600 Temperature{&deg; F)
CVGraph 6.02                                                 08/05/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                                 November 2021 Revision 0
       *** 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 Plant: Prairie Island 1                              M aterial A533Bl                                        Heat: HSST 02 Orientation: NA                                         Capsule: V                              Fluence: 6.09E+018 n/cm*
Capsule V Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 lnputCVN                    Computed CVN                   Differential 75                          10. 5                        10.3                           0. 19 150                          24.5                         30.5                          -5.95 175                          46.5                         41.1                           5.42 2 10                          65.5                         56.8                           8.69 250                           52.5                         71. 9                       -1 9.38 275                           84.0                         78.5                           5.46 300                           86.0                         83.2                           2.82 350                           96.5                         88. 2                          8.30 CVGraph 6.02                                            08/05/202 1                                                Page 2/2 WCAP-18660-NP                                                                                                      November 2021 Revision 0
    *** 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 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/202 1 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&deg; F                  Temp@35 ft-lbs=2 13.30&deg; F                     Temp@50 ft-lbs=228.30&deg; F Plant: Prairie Island 1                                    Material: A533B1                                            Heat: HSST 02 Orientation: NA                                                Capsule: P                                   Fluence: 1.31E+019 n/cm' 100         :            :           :                                                                    :            :
0 90 C)
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               -300         -200         -100            0           100           200          300          400          500            600 Temperature{&deg; F)
CVGraph 6.02                                                  06/29/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                                  November 2021 Revision 0
       *** 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 P lant: Prairie Island 1                              M aterial: A533Bl                                      Heat: HSST 02 Orientation : NA                                         Capsule: P                             F luence: 1.31E+019 n/cm*
Capsule P Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                lnputCVN                     Computed CVN                   Differential 125                          9.0                          2.9                            6.08 200                          25.0                         23.4                            1.63 2 10                         28.0                         31. 9                          -3.93 225                          49.5                         46.8                            2.72 250                          67 0                         68.2                           -1.25 300                          87.5                         83.0                            4.45 350                          73.5                         84.6                         -11 .15 425                          93. 5                        84.8                            8.70 CVGraph 6.02                                            06/29/202 1                                                Page 2/2 WCAP-18660-NP                                                                                                      November 2021 Revision 0
    *** 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 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&deg; F                  Temp@35 ft-lbs=249 .20&deg; F                 Temp@50 ft-lbs=277.00&deg; F Plant: Prairie Island 1                                  Material: A533B1                                            Heat: HSST 02 Orientation: NA                                              Capsule: R                                   Fluence: 4.02E+019 n/cm' 0 ....____.._.....__.....__....____._.....__.....__....____.__......_....__......_..._......_ ......._ ......_..._......
            -300          -200        -100           0           100           200          300          400          500         600 Temperature{&deg; F)
CVGraph 6.02                                                06/29/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                              November 2021 Revision 0
    *** 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 Plant: Prairie Island 1                               Material: A533Bl                                      Heat: HSST 02 Orientation: NA                                         Capsule: R                              Fluence: 4.02E+019 n/cm*
Capsule R Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 lnputCVN                    Computed CVN                   Differential 150                           9.0                          5.6                          3.39 200                           10.0                         14.3                         -4.33 225                           30.0                         23.3                          6. 74 250                           31. 0                        35.5                         -4.47 300                           62.0                         60.9                          1.13 350                           720                          74.6                         -2.62 375                           79.0                         77. 5                         1.46 425                           91.0                         79.9                         11.11 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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&deg; F                Temp@35 ft-lbs=219.10 &deg; F                 Temp@50 ft-lbs=238.20&deg; F Plant: Prairie Island 1                                 Material: A533B1                                            Heat: HSST 02 Orientation: NA                                             Capsule: S                                   Fluence: 4.39E+019 n/cm'
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             -300         -200        -100           0           100           200          300          400           500         600 Temperature (&deg; F)
CVGraph 6.02                                               06/29/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                               November 2021 Revision 0
      *** 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 Plant: Prairie Island 1                               Material: A533Bl                                     Heat: HSST 02 Orientation: NA                                          Capsule: S                             Fluence: 4.39E+019 n/cm*
Capsule S Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 lnputCVN                    Computed CVN                   Differential 150                           9.0                          5.6                          3.39 200                           21.0                         21.8                         -0.83 206                           19.0                         25.6                         -6.57 225                           47.0                         39.6                          7.37 250                           57 0                         58.6                         -157 300                           76.0                         78.1                         -2.08 350                           78.0                         81.9                         -3.86 400                           87 0                         82.4                          4.59 CVGraph 6.02                                            06/29/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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&deg; F                 Temp@35 ft-lbs=257.70&deg; F                  Temp@50 ft-lbs=304.00&deg; F Plant: Prairie Island 1                                  Material: A533B1                                            Heat: HSST 02 Orientation: NA                                              Capsule: N                                   Fluence: 8.45E+019 n/cm'
  --        50
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             -300         -200         -100           0           100           200          300          400           500         600 Temperature (&deg; F)
CVGraph 6.02                                                06/23/2021                                                     Page 1/2 WCAP-18660-NP                                                                                                                November 2021 Revision 0
       *** 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 Plant: Prairie Island 1                               Material: A533Bl                                     Heat: HSST 02 Orientation: NA                                         Capsule: N                              Fluence: 8.45E+019 n/cm*
Capsule N Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 lnputCVN                    Computed CVN                   Differential 200                           13 0                         12.l                          0.94 225                           23.0                         20.6                          2.43 250                           29.8                         31.6                         -1.79 275                           38.0                         42.0                         -3.97 300                           52.0                         49.2                          2.82 325                           63.0                         53.2                          9.79 325                           42. 0                        53.2                        -11.21 350                           65.5                         55.2                         10.32 CVGraph 6.02                                            06/23/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 Unirradiated Correlation Monitor Material 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&deg; F Plant: Prairie Island 1                                 Material: A533B1                                          Heat: HSST 02 Orientation: NA                                         Capsule: Unirrad                              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 (&deg; F)
CVGraph 6.02                                               06/29/2021                                                   Page 1/2 WCAP-18660-NP                                                                                                            November 2021 Revision 0
    *** 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 Plant: Prairie Island 1                               Material: A533B1                                      Heat: HSST 02 Orientation: NA                                       Capsule: Unirrad                          Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Temperature {&deg; F)                 Input L. E.                  Computed L. E.                Differential
                   -5 0                          4.0                          5.0                         -102
                   -50                           3.0                          5.0                         -2.02
                   -50                           5.0                          5.0                         -0.02
                   -20                           9.0                          8.8                          0.18
                   -20                           6.0                          8.8                         -2.82
                   -20                          10.0                          8.8                          1.18 10                          14. 0                        15.6                         -158 10                          15.0                         15.6                         -0.58 10                          14. 0                        15.6                         -158 40                          32.0                         26.3                          5.72 40                          23.0                         26.3                         -3.28 40                          32.0                         26.3                          5.72 85                          45.0                         48.0                         -3 .04 85                          510                          48.0                          2.96 85                          42. 0                        48.0                         -6.04 11 0                         54. 0                        59.9                         -5.91 11 0                         60.0                         59.9                          0.09 11 0                         710                          59.9                         1109 160                          79.0                         76.1                          2.87 160                          720                          76.l                         -4.13 160                          69.0                         76.l                         -7.13 210                           870                          83.0                          4.00 210                           84.0                         83.0                          100 210                           88.0                         83.0                          5.00 300                           84. 0                        86.0                         -2.00 300                           87 0                         86.0                          100 300                           83.0                         86.0                         -3.00 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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&deg; F Plant: Prairie Island 1                                 Material: A533B1                                         Heat: HSST 02 Orientation: NA                                            Capsule: V                                 Fluence: 6.09E+018 n/cm' 60
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                -300         -200        -100           0           100           200         300          400         500         600 Temperature (&deg; F)
CVGraph 6.02                                               08/05/2021                                                  Page 1/2 WCAP-18660-NP                                                                                                               November 2021 Revision 0
         *** 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 Plant: Prairie Island 1                              M aterial A533Bl                                       Heat: HSST 02 Orientation : NA                                        Capsule: V                              Fluence: 6.09E+018 n/cm*
Capsule V Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 Input L. E.                 Computed L. E.                 Differential 75                           2.0                          8.0                         -6.02 150                          18.0                         21.9                         -390 175                          36.0                         29.2                          6. 77 2 10                          47.0                         40.9                          6.06 250                           46.0                         54.1                         -8. 13 275                           59.0                         61.1                         -2.08 300                           68.0                         66.6                          1.36 350                           76.0                         73.8                          2. 17 CVGraph 6.02                                            08/05/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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 mi ls=217.40&deg; F Plant: Prairie Island 1                                 Material: A533B1                                          Heat: HSST 02 Orientation: NA                                             Capsule: P                                Fluence: 1.31E+019 n/cm'
  *---        50
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                -300         -200        -100           0           100           200         300          400         500          600 Temperature (&deg; F)
CVGraph 6.02                                               06/29/2021                                                   Page 1/2 WCAP-18660-NP                                                                                                                 November 2021 Revision 0
         *** 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 Plant: Prairie Island 1                               M aterial: A533Bl                                     Heat: HSST 02 Orientation : NA                                         Capsule: P                             Fluence: 1.31E+019 n/cm*
Capsule P Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 Input L. E.                  Computed L. E.                Differential 125                           5.1                          2.2                           2.93 200                           21.3                         23.4                          -2.14 2 10                          33.1                         30.1                           3 03 225                           36. 2                        40.0                          -3.75 250                           57. 9                        52.0                           5.9 1 300                           47.2                         59. 7                       -1 2.49 350                           68.9                         60.6                           8.29 425                           61. 4                        60. 7                          0.68 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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. = 79.0 5          Lower Shelf L.E. = 1.00 (Fixed)
Temp'.@35 mi ls=299.80&deg; F Plant: Prairie Island 1                                  Material: A533B1                                         Heat: HSST 02 Orientation: NA                                             Capsule: R                                 Fluence: 4.02E+019 n/cm' 60
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                -300         -200        -100           0           100           200          300          400         500         600 Temperature (&deg; F)
CVGraph 6.02                                               06/29/2021                                                   Page 1/2 WCAP-18660-NP                                                                                                                November 2021 Revision 0
         *** 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 Plant: Prairie Island 1                               Material: A533Bl                                      Heat: HSST 02 Orientation: NA                                         Capsule: R                              Fluence: 4.02E+019 n/cm*
Capsule R Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 Input L. E.                 Computed L. E.                 Differential 150                           6. 0                         7. 9                         -1.92 200                           10.0                         13.7                          -3.70 225                           23.0                         17. 8                          5.19 250                           18.0                         22.8                          -4.82 300                           41.0                         35 .1                          5.93 350                           56.0                         48.4                           7.59 375                           39.0                         54.6                        -1 5.55 425                           70.0                         64.5                           5.50 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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 mi ls=238.40&deg; F Plant: Prairie Island 1                                 Material: A533B1                                         Heat: HSST 02 Orientation: NA                                             Capsule: S                                Fluence: 4.39E+019 n/cm' 0
  *---        50
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     = 40
  *- =
0
      ~
      ~
Q.
      ~
     ~       30
      ~
aJ
      ~
20
     ~
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 (&deg; F)
CVGraph 6.02                                               06/29/2021                                                  Page 1/2 WCAP-18660-NP                                                                                                                November 2021 Revision 0
         *** 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 Plant: Prairie Island 1                               M aterial: A533Bl                                    Heat: HSST 02 Orientation : NA                                         Capsule: S                             Fluence: 4.39E+019 n/cm*
Capsule S Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 Input L. E.                  Computed L. E.                Differential 150                           9.0                          3.0                          6.04 200                           14.0                         13.8                          0.19 206                           13 0                         16.5                         -3.49 225                           29.0                         26. 9                         2.07 250                           41.0                         41. 5                        -0.55 300                           57.0                         56.4                          0.60 350                           64.0                         59.0                          4.97 400                           54.0                         59.4                         -5.37 CVGraph 6.02                                            06/29/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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 mi ls=289.70&deg; F Plant: Prairie Island 1                                 Material: A533B1                                         Heat: HSST 02 Orientation: NA                                             Capsule: N                                Fluence: 8.45E+019 n/cm'
  *---        50
      ~
   ._,8
     = 40
  *- =
0
      ~
      ~
Q.
      ~
     ~       30
      ~
aJ
      ~
20
     ~
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 (&deg; F)
CVGraph 6.02                                               06/23/2021                                                  Page 1/2 WCAP-18660-NP                                                                                                               November 2021 Revision 0
         *** 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 Plant: Prairie Island 1                               Material: A533Bl                                     Heat: HSST 02 Orientation: NA                                         Capsule: N                              Fluence: 8.45E+019 n/cm*
Capsule N Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                 Input L. E.                 Computed L. E.                 Differential 200                           10.0                         10.8                         -0.79 225                           16.0                         15.7                          0.29 250                           24.0                         22.2                          1.79 275                           26 0                         30.0                         -4.05 300                           44.0                         38.5                          5.48 325                           50.0                         46.6                          3.35 325                           39.0                         46.6                         -7.65 350                           55.0                         53.6                          1.39 CVGraph 6.02                                            06/23/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                                C-171 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 Plant: Prairie Island 1                                 Material: A533B1                                          Heat: HSST 02 Orientation: NA                                         Capsule : Unirrad                              Fluence: 0.00E+000 n/cm' 100
               ----+----+----+------- - - - - - - - - - - - - - - ----
   ~
   ~
QJ     60
  .c 00.
   =
QJ CJ 501--- - - - - - + - - - - - -- ----+----1------+-----+----1
   ~      40   - -- - ~ - - - + - - - --,....."'"+-- - - - - ~ - - - + - - - - --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{&deg; F)
CVGraph 6.02                                               06/29/2021                                                  Page 1/2 WCAP-18660-NP                                                                                                           November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                             C-172 Plant: Prairie Island 1                               Material: A 533B1                                     Heat : HSST 02 Orientation : NA                                      Capsule: Unirrad                          Fluence: O.OOE+OOO n/cm 2 U nirradiated Correlation Monitor Material Charpy V-Notch Data Temperature {&deg; F)                Input %Shear                 Computed %Shear                Differential
                   -50                           9.0                           6.3                         2.66
                   -50                           9.0                           6.3                         2.66
                   -50                           9.0                           6.3                         2.66
                   -20                          no                           10.9                          2.06
                   -20                           9.0                         10.9                         -1. 94
                   -20                          no                            10.9                         2.06 10                          23.0                          18.2                         4.79 10                          23.0                         18.2                          4.79 10                          21 0                         18.2                          4.79 40                          29.0                         28 .8                         0.23 40                          33.0                         28.8                          4.23 40                          29.0                         28.8                          0.23 85                          42.0                         49. 7                        -7.66 85                          43.0                         49. 7                        -6.66 85                          41. 0                        49. 7                        -8.66 11 0                         55.0                         61.8                         -6.84 11 0                         58.0                         61.8                         -3.84 11 0                         67 0                         61.8                          5.16 160                          87 0                         81.4                          5.62 160                          84.0                         81.4                          2.62 160                          85.0                         81.4                          3.62 210                          100.0                         92.2                          7.82 210                           98.0                         92.2                          5.82 210                           98.0                         92.2                          5.82 300                          100.0                         98.6                          1.40 300                          1000                          98 .6                         140 300                          1000                          98 .6                         140 CVGraph 6.02                                            06/29/202 1                                                Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                                        C-173 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)
Temperature at 50% Shear = 217.20 Plant: Prairie Island 1                                     Material: A533B1                                               Heat: HSST 02 Orientation: NA                                                Capsule: V                                       Fluence: 6.09E+018 n/cm' 100
   ~
   ~
QJ 60   - -- - + - - - - + - - - - + - - - - + - - - - + -- + -- - + - - - - + - - - - + - - ---'I
  .c 00.
   =
QJ CJ 50 1----'---+---'--t-----'--+---+-----IE~-0-- + - - - - + - - - + - - ; _ _--I
  ~
   ~      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{&deg; F)
CVGraph 6.02                                                 06/29/2021                                                          Page 1/2 WCAP-18660-NP                                                                                                                     November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                            C-174 Plant: Prairie Island 1                               Material: A533Bl                                      Heat: HSST 02 Orientation: NA                                         Capsule: V                              Fluence: 6.09E+018 n/cm*
Capsule V Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                Input %Shear                Computed %Shear                 Differential 75                          10.0                          5.8                           4.23 150                          20.0                         21.1                          -1 09 175                          35.0                         304                            4.59 2 10                          50.0                         46.5                           3.50 250                           50.0                         65.6                        -1 5.61 275                           70.0                         75.7                          -5.72 300                          100.0                         83.6                         164 0 350                          1000                          93.2                           6.84 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                                          C-175 Capsule P Correlation Monitor Material CVGraph 6.02: Hyperbolic Tangent Curve Printed on 6/29/2021 8:0 1 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)
Temperature at 50% Shear= 22 1.40 Plant: Prairie Island 1                                     Material: A533B1                                                Heat: HSST 02 Orientation: NA                                                Capsule: P                                       Fluence: 1.31E+019 n/cm' 100
   ~
   ~
QJ 60   - -- - + - - - + - - - - + - - - - + - - - - + -- + -- - + - - - - + - - - - + - - ---'I
  .c 00.
   =
QJ CJ 501------1----+----+--------+-11----1------+-----+----1
  ~
   ~      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{&deg; F)
CVGraph 6.02                                                  06/29/2021                                                           Page 1/2 WCAP-18660-NP                                                                                                                       November 2021 Revision 0
    *** 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 P lant: Prairie Island 1                              M aterial: A533Bl                                     Heat: HSST 02 Orientation : NA                                         Capsule: P                             F luence: 1.31E+019 n/cm*
Capsule P Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)               Input %Shear                 Computed %Shear                 Differential 125                          9.0                           4.7                          4.3 1 200                          38.0                         33.9                           4.08 2 10                         34.0                         41.2                          -7.23 225                          58.0                         52.9                           5.14 250                          65.0                         71 0                          -6.0 1 300                         100.0                         92.1                           7.88 350                         l00.0                         98.2                           1.76 425                         1000                          99.8                           0.17 CVGraph 6.02                                            06/29/202 1                                               Page 2/2 WCAP-18660-NP                                                                                                      November 2021 Revision 0
    *** 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-177 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)
Temperature at 50% Shear = 266.80 Plant: Prairie Island 1                                   Material: A533B1                                             Heat: HSST 02 Orientation: NA                                              Capsule: R                                   Fluence: 4.02E+019 n/cm' 100
   ~
   ~
QJ 60   ----+----+----+----+----+--------1--- - - - - - - - - ----
  .c 00.
   =
QJ CJ 501------1----+----+--------+---1--1------+-----+----1
  ~
   ~      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{&deg; F)
CVGraph 6.02                                               06/29/2021                                                       Page 1/2 WCAP-18660-NP                                                                                                                 November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                           C-178 Plant: Prairie Island 1                               Material: A533Bl                                     Heat: HSST 02 Orientation: NA                                         Capsule: R                              Fluence: 4.02E+019 n/cm*
Capsule R Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                Input %Shear                Computed %Shear                 Differential 150                          13 0                          6. 1                         6.94 200                           23.0                         17.3                          5.73 225                           32.0                         27.3                          4.72 250                           32.0                         40.3                         -8.28 300                           59.0                         68.6                         -9.56 350                          100.0                         87. 6                        12.42 375                          l00.0                         92. 7                         7.31 425                          1000                          97.6                          2.38 CVGraph 6.02                                            06/29/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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-179 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 = 0.99 1 Equation is A + B * [Tanh((T-T0)/(C+DT))J Upper Shelf%Shear = 100.00 (Fixed)                    Lower Shelf %Shear= 0.00 (Fixed)
Temperature at 50% Shear = 249.90 Plant: Prairie Island 1                                     Material: A533B1                                                Heat: HSST 02 Orientation: NA                                                 Capsule: S                                       Fluence: 4.39E+019 n/cm' 100
   ~
   ~
QJ 60   - -- - + - - - + - - - - + - - - - + - - - - + - -- + -- + - - - - + - - - - + - - ---'I
  .c 00.
   =
QJ CJ 501------1----+----+--------+--t---1------+-----+----1
  ~
   ~      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{&deg; F)
CVGraph 6.02                                                  06/29/2021                                                            Page 1/2 WCAP-18660-NP                                                                                                                        November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                           C-180 Plant: Prairie Island 1                               Material: A533Bl                                     Heat: HSST 02 Orientation: NA                                          Capsule: S                             Fluence: 4.39E+019 n/cm*
Capsule S Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                Input %Shear                Computed %Shear                 Differential 150                          15.0                          5.1                          9.90 200                           20.0                         18.8                          1.16 206                           15.0                         21.7                         -6.68 225                           30.0                         32.6                         -2.56 250                           55.0                         50. 1                         4.90 300                           80.0                         81.3                         -1.28 350                           95.0                         94.9                          0.06 400                          1000                          98.8                          1.22 CVGraph 6.02                                            06/29/202 1                                              Page 2/2 WCAP-18660-NP                                                                                                     November 2021 Revision 0
    *** 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 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)
Temperature at 50% Shear = 267.80 Plant: Prairie Island 1                                  Material: A533B1                                             Heat: HSST 02 Orientation: NA                                               Capsule: N                                   Fluence: 8.45E+019 n/cm' 100
   ~
   ~
QJ 60   - -- - + - - - + - - - - + - - - - + - - - - + - --                           - + - - - - + - - - - + - - ---'I
  .c 00.
   =
QJ CJ 501------1----+----+--------+---+-l------+-----+----1
   ~      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{&deg; F)
CVGraph 6.02                                                06/23/2021                                                      Page 1/2 WCAP-18660-NP                                                                                                                 November 2021 Revision 0
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Westinghouse Non-Proprietary Class 3                                             C-182 Plant: Prairie Island 1                               Material: A533Bl                                       Heat: HSST 02 Orientation: NA                                         Capsule: N                              Fluence: 8.45E+019 n/cm*
Capsule N Correlation Monitor Material Charpy V-Notch Data Temperature (0 F)                Input %Shear                Computed %Shear                 Differential 200                           20.0                         11. 9                          8. 11 225                           35.0                         22.0                         12.97 250                           35.0                         37.2                          -2. 18 275                           40.0                         55 4                        -1 5.35 300                           55.0                         72. 2                       -1 7.19 325                          100.0                         84.5                         15.53 325                          100.0                         84.5                         15.53 350                          1000                          91. 9                          8.07 CVGraph 6. 02                                           06/23/202 1                                                Page 2/2 WCAP-18660-NP                                                                                                      November 2021 Revision 0
    *** 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 APPENDIX D                     PRAIRIE ISLAND UNIT 1 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 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.
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.
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)
WCAP-18660-NP                                                                                               November 2021 Revision 0
 *** 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-2 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&deg;F for welds and 17&deg;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].
WCAP-18660-NP                                                                                               November 2021 Revision 0
 *** 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 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&deg;F for welds and less than 17&deg;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 RT NDT 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.
WCAP-18660-NP                                                                                               November 2021 Revision 0
 *** 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 Table D-1           Calculation of Interim Chemistry Factors for the Credibility Evaluation Using Prairie Island Unit 1 Surveillance Data Capsule Fluence(1)                            RTNDT(3)      FF*RTNDT Material             Capsule                                          FF(2)                                               FF2 (x 1019 n/cm2,                               (&deg;F)             (&deg;F)
E > 1.0 MeV)
V                       0.609              0.861             31.9             27.5             0.741 Intermediate                P                         1.31             1.075             23.2             24.9             1.156 Shell Forging C R                         4.02             1.357             96.0            130.3             1.842 (Tangential Orientation)                S                         4.39             1.376            101.6            139.8             1.893 N                         8.45             1.491            165.5            246.8             2.224 V                       0.609              0.861             48.8             42.0             0.741 Intermediate                P                         1.31             1.075             33.9             36.4             1.156 Shell Forging C R                         4.02             1.357             84.0            114.0             1.842 (Axial Orientation)                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) &#xf7; (FF ) = (1083.6) &#xf7; (15.715) = 69.0&deg;F 2
Intermediate                V                       0.609              0.861             35.2             30.3             0.741 Shell to Lower               P                         1.31             1.075             45.6             49.0             1.156 Shell R                         4.02             1.357            123.0            166.9             1.842 Circumferential Weld - Seam W3                S                         4.39             1.376            161.0            221.5             1.893 (Heat # 1752)                N                         8.45             1.491            219.0            326.6             2.224 SUM:         794.4             7.857 CF Surv. Weld = (FF
* RTNDT) &#xf7; (FF ) = (794.4) &#xf7; (7.857) = 101.1&deg;F 2
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.
WCAP-18660-NP                                                                                                November 2021 Revision 0
     *** 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 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
                                                                                                                                            <17&deg;F Capsule CF(1)                                 Measured        Predicted        Scatter            (Base Fluence(2)
Material              Capsule         (Slopebest-fit)                  FF(3)      RTNDT(4)       RTNDT(5)      RTNDT(6)           Metal)
(x 1019
(&deg;F)                                    (&deg;F)            (&deg;F)           (&deg;F)              <28&deg;F n/cm2)
(Weld)
V                                 0.609       0.861         31.9            59.4           27.5               NO Intermediate Shell             P                                 1.31       1.075         23.2            74.2           51.0               NO Forging C (Tangential                R                                 4.02       1.357         96.0            93.7            2.3               YES Orientation)               S                                 4.39       1.376        101.6            94.9            6.7               YES N                                  8.45       1.491        165.5           102.9           62.6               NO 69.0 V                                 0.609       0.861         48.8            59.4           10.6               YES Intermediate Shell             P                                 1.31       1.075         33.9            74.2           40.3               NO Forging C                 R                                 4.02       1.357         84.0            93.7            9.7               YES (Axial Orientation)             S                                 4.39       1.376         74.0            94.9           20.9               NO N                                  8.45       1.491        147.5           102.9           44.6               NO V                                 0.609       0.861         35.2            87.1           51.9               NO Intermediate Shell to Lower Shell               P                                 1.31       1.075         45.6           108.7           63.1               NO Circumferential               R                 101.1           4.02       1.357        123.0           137.2           14.2               YES Weld - Seam W3                S                                 4.39       1.376        161.0           139.1           21.9               YES (Heat # 1752)
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&deg;F for base metal and less than 28&deg;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.
WCAP-18660-NP                                                                                               November 2021 Revision 0
            *** 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 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&deg;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&deg;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.
WCAP-18660-NP                                                                                               November 2021 Revision 0
 *** 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 Table D-3           Calculation of Residual vs. Fast Fluence for Prairie Island Unit 1 Capsule                                                                                         2 RG 1.99                      Uncertainty Capsule             Fluence                           Measured Shift                           Residual FF                                       Shift                       Less Than (x 1019 n/cm2,                              (F)(1)                             (F)(3)
(F)(2)                         50F E > 1.0 MeV)
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
* FF.
(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.
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 1 surveillance plate and weld data are deemed non-credible.
WCAP-18660-NP                                                                                                  November 2021 Revision 0
 *** 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 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, 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]
WCAP-18660-NP                                                                                              November 2021 Revision 0
*** This record was final approved on 12/1/2021 8:24:23 AM. (This statement was added by the PRIME system upon its validation)}}