ML20246G709

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Enclosure 4: Attachment 2 - WCAP-18353-NP, Rev. 0, Reactor Internals Fluence Evaluation for a Westinghouse 3-Loop Plant with Two Units - Subsequent License Renewal
ML20246G709
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Site: North Anna  Dominion icon.png
Issue date: 10/31/2018
From:
Virginia Electric & Power Co (VEPCO), Westinghouse
To:
Office of Nuclear Reactor Regulation
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ML20246G703 List:
References
20-115
Download: ML20246G709 (91)
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Serial No.: 20-115 Docket Nos.: 50-338/339 Enclosure 4 Attachment 2 WCAP-18353-NP, REVISION 0 Virginia Electric and Power Company (Dominion Energy Virginia)

North Anna Power Station Units 1 and 2

Westinghouse Non-Proprietary Class 3 WCAP-18353-NP October 2018 Revision 0 Reactor Internals Fluence Evaluation for a Westinghouse 3-Loop Plant vvith Two Units -

Subsequent License Renewal

  • @westinghouse
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Westinghouse Non-Proprietary Class 3 WCAP-18353-NP Revision 0 Reactor Internals Fluence Evaluation for a Westinghouse 3-Loop Plant with Two Units - Subsequent License Renewal Riley I. Benson*

Advanced Mechanical Design October 2018 Reviewer: Benjamin W. Amiri*

Radiation Engineering & Analysis Taylor N. Terek*

Aging Management & License Renewal Approved: Laurent P. Houssay*, Manager Radiation Engineering & Analysis

  • Electronically approved records are authenticated in the electronic document management system.

Westinghouse Electric Company LLC 1000 Westinghouse Drive Cranberry Township, PA 16066, USA

© 2018 Westinghouse Electric Company LLC All Rights Reserved WCAP-18353-NP.docx

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Westinghouse Non-Proprietary Class 3 ii RECORD OF REVISIONS Revision Description Completed 0-A Original Draft Issue March 2018 0 Original Issue October 2018 WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 iii TABLE OF CONTENTS LIST OF TABLES ....................................................................................................................................... iv LIST OF FIGURES ...................................................................................................................................... V EXECUTIVE

SUMMARY

.......................................................................................................................... vi 1 INTRODUCTION ........................................................................................................................ 1-1 2 NEUTRON TRANSPORT CALCULATIONS ............................................................................ 2-1 2.1 METHOD OF ANALYSIS .............................................................................................. 2-1 2.2 REACTOR INTERNALS UPPER CORE PLATE, AND UPPER SUPPORT PLATE FLUENCE EXPOSURE .................................................................................................. 2-6 2.3 REACTOR INTERNALS FAST NEUTRON FLUENCE MAP AT 60 YEARS OPERATION (UNIT 1 AT 51.6 EFPY, UNIT 2 AT 52.8 EFPY) ..................................... 2-7 2.4 REACTOR INTERNALS FAST NEUTRON FLUENCE MAP AT 80 YEARS OPERATION (72 EFPY) ............................................................................................... 2-16 2.5 FIGURE OF MERIT AND POWER DENSITY ........................................................... 2-25 2.6 REACTOR INTERNALS COMPONENTS MATERIAL RELIABILITY PROGRAM (MRP) FLUENCE SCREENING .................................................................................. 2-26 3 REFERENCES ............................................................................................................................. 3-1 WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 iv LIST OF TABLES Table 2.2-1 Maximum Fast Neutron (> 1.0 MeV) Fluence at the Selected Westinghouse 3-Loop Plant Unit 1 UCP Bottom, Top Surfaces and USP [n/cm2] ............................................................... 2-6 Table 2.2-2 Maximum Fast Neutron(> 1.0 MeV) Fluence at the Selected Westinghouse 3-Loop Plant Unit 2 UCP Bottom, Top Surfaces and USP [n/cm2] ............................................................... 2-6 Table 2.5-1 Unit 1 Power Density and Figures of Merit [W/cm2] ........................................................... 2-25 Table 2.5-2 Unit 2 Power Density and Figures of Merit [W/cm2] ........................................................... 2-25 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY ................................................................................. 2-28 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY .................................................................................... 2-41 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY ................................................................................. 2-54 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY .................................................................................... 2-67 WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 V LIST OF FIGURES Figure 2.1-1 Plan View of the Selected Westinghouse 3-Loop Plant Reactor Geometry at the Core Midplane with Surveillance Capsules .............................................................................. 2-4 Figure 2.1-2 The selected Westinghouse 3-Loop Plant r,z Reactor Geometry .......................................... 2-5 Figure 2.3-1 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY) ......................................................... 2-8 Figure 2.3-2 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY) ......................................................... 2-9 Figure 2.3-3 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY) ................................ 2-10 Figure 2.3-4 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 0 =:= 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY) ................................ 2-11 Figure 2.3-5 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY) ....................................................... 2-12 Figure 2.3-6 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL_ (5~.8 E~PY) .. ******:**********************-****-***,:****:*,:*********2-13 Figure 2.3-7 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY) ................................ 2-14 Figure 2.3-8 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY) ................................ 2-15 Figure 2.4-1 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY) .......................................................... 2-17 Figure 2.4-2 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY) .......................................................... 2-18 Figure 2.4-3 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY) ................................... 2-19 Figure 2.4-4 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY) ................................... 2-20 Figure 2.4-5 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY) .......................................................... 2-21 Figure 2.4-6 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY) .......................................................... 2-22 Figure 2.4-7 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY) ................................... 2-23 Figure 2.4-8 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY) ................................... 2-24 WCAP-18353-NP October 2018 Revision 0

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____J

Westinghouse Non-Proprietary Class 3 vi EXECUTIVE

SUMMARY

This report describes a neutron fluence assessment on reactor internals performed for a Westinghouse 3-loop plant with two units in support of subsequent licensing renewal based on the guidance specified in Regulatory Guide 1.190, "Calculational and Dosimetry Methods for Determining Pressure Vessel Neutron Fluence" (Reference 1). In this assessment, the reactor models for a similar standard Westinghouse 312 reactor in Reference 16 have been modified to be applicable to the plant used in this analysis. These models had a more detailed geometry including the upper internals geometry needed for this analysis.

Using the updated models, radiation transport calculations have been performed on a fuel-cycle-specific basis, using fuel cycle information specific for the two units located at the selected Westinghouse 3-loop plant site to calculate reactor internals fast neutron fluences. This evaluation has determined which fast neutron fluence range (E > 1.0 MeV) applies to each reactor internals component and support binning of the selected Westinghouse 3-loop plant units' reactor internals components for MRP-191 (Reference 6) screening purposes. Screening criteria for fast neutron fluence are taken from the updated MRP-191, which are consistent with MRP-175 (Reference 10):

  • 1.3 x 1020 n/cm 2 (per MRP-175, screening threshold for stress relaxation in bolts)
  • 6.7 x 1020 n/cm2 (per MRP-175, screening threshold for IE in CASS)
  • 1.0 x 1021 n/cm 2 (per MRP-175, screening threshold for IE in austenitic stainless steel)
  • -2~0 x 1021 n/cm2 (per MRP~l 75, minirnum:-dose for IASCC (requires 89 ksi stress))
  • 1.3 x 1022 n/cm 2 (per MRP-175, screening threshold for void swelling)

Where:

IE - Irradiation Embrittlement CASS - Cast Austenitic Stainless Steel IASCC - Irradiation Assisted Stress Corrosion Cracking The most appropriate grouping of reactor internals components based on location relative to the fast neutron fluence (E > 1.0 MeV) region boundaries for the selected Westinghouse 3-loop plant units has been determined for 51.6 effective full-power years (EFPY) for Unit 1, 52.8 EFPY for Unit 2, and 72 EFPY of operations for both units, respectively, and presented in this report.

The power densities and figures of merit for the selected Westinghouse 3-loop plant Units 1 and 2 are presented in Section 2.5.

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Westinghouse Non-Proprietary Class 3 1-1 1 INTRODUCTION Demonstration that the effects of aging degradation in pressured water reactor (PWR) internals are adequately managed is essential for maintaining a healthy fleet and assuring continued functionality of the reactor internals. A series of Materials Reliability Programs (MRP) have been developed to implement this goal. First, a set of screening criteria threshold values with sound technical bases are developed for age-related degradation evaluation of PWR internals component items (Reference 10) after the framework for managing aging components is done (Reference 3). Then, initial screening and categorization have been performed on Westinghouse and Combustion Engineering (CE) designed PWRs (Reference 6) based on those screening criteria in Reference 10, followed by further screening and categorization based on failure likelihood (susceptibility) and damage likelihood (consequence severity) through failure modes, effects, and criticality analysis (FMECA), then by functionality analysis (Reference 11). References 8, 9, and 12 establish aging management strategies and inspection and evaluation guidelines for Westinghouse and CE designed reactor internals components in different categories.

Among the eight postulated aging mechanisms related to reactor internals, four are related to radiation exposure: irradiation enhanced stress relaxation (SR), irradiation embrittlement (IE), irradiation-assisted stress corrosion cracking .(IASCC), and void swelling (VS). For these aging mechanisms, fast neutron exposure (e.g., fast neutron fluence (E > 1.0 MeV)) is an important parameter for screening and categorization for the reactor internals.

This report describes a reactor vessel internals fluence assessment for a selected Westinghouse 3-loop plant with two units. The neutron exposure experienced by the reactor internals-was determined-on a fuel-cycle-specific basis for the first 24 operating cycles (approximately 29.7 EFPY) for Unit 1 and first 23 operating cycles (approximately 28.1 EFPY) for Unit 2, respectively. Following completion of these plant-specific exposure assessments encompassing the fuel cycles completed to date, projections of the future neutron exposure extending to 51.6 EFPY and 72 EFPY (for Unit 1) and 52.8 EFPY and 72 EFPY (for Unit 2) of operations were performed, corresponding to 60 years of end-of-life (EOL) operation and 80 years subsequent licensing renewal EOL operation, respectively. In performing the fluence projections, the assumption was made that the spatial power distribution, power level, and reactor operating characteristics. of Cycle 24 for Unit 1 and Cycle 23 for Unit 2 would be representative through the 60 year and 80 year EOL operating period.

In this assessment, neutron exposures expressed in terms of fast neutron (E > 1.0 Me V) fluence were established for the reactor internals of Unit 1 at 51.6 EFPY and 72 EFPY and for the reactor internals of Unit 2 at 52.8 EFPY and 72 EFPY, respectively. The fast neutron fluence levels for reactor internals components were then compared against various irradiation screening criteria threshold values for different aging mechanisms for appropriate binning or categorization.

Regulatory Guide 1.190, "Calculational and Dosimetry Methods for Determining Pressure Vessel Neutron Fluence" (Reference 1), describes state-of-the-art calculation and measurement procedures that are acceptable to the United States Nuclear Regulatory Commission (USNRC) staff for determining pressure vessel fluence. Because there is no regulatory guide published by USNRC on how to perform neutron fluence calculation on reactor internals, Regulatory Guide 1.190 was used as a reference guide to perform the fast neutron fluence evaluation on reactor internals.

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Westinghouse Non-Proprietary Class 3 1-2 In subsequent sections of this report, the methodologies used to perform neutron transport calculations are described in detail. The results of the plant-specific transport calculations are given for the selected Westinghouse 3-loop plant units' reactor internals. The fast neutron fluence results on reactor internals were plotted as fast neutron fluence contour maps corresponding to the MRP screening criteria threshold values. The locations of the reactor internals components were then identified relative to the fast neutron fluence maps and binned into nine different screening groups.

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Westinghouse Non-Proprietary Class 3 2-1 2 NEUTRON TRANSPORT CALCULATIONS As noted in Section 1 of this report, the exposure of the selected Westinghouse 3-loop Plant Units 1 and 2 reactor internals was developed based on a series of fuel-cycle-specific neutron transport calculations. In this section, the neutron transport methodology is discussed in detail.

2.1 METHOD OF ANALYSIS Discrete ordinates transport calculations were performed on a fuel-cycle-specific basis to determine the neutron and gamma ray environment within the reactor geometry of the selected Westinghouse 3-loop plant Units 1 and 2. The specific methods applied are consistent with those described in References 1 and 7 for reactor vessel fluence evaluation, which is the best available regulatory guidance on fluence calculation on reactor vessel environment to date. In the application of this methodology to the fast neutron exposure evaluations for the selected Westinghouse 3-loop plant Units 1 and 2, plant-specific forward transport calculations were carried out using the following two-dimensional/one-dimensional fluence rate synthesis technique for the reactor vessel:

¢(r,0,z) =¢(r,0) x ¢(r,z)

¢(r) where ¢(r,-e,zr-is the synthesized lhree-dimensional neufron :fluence rate distribution, ¢(r,0) is the transport solution in r,0 geometry, ¢(r,z) is the two-dimensional solution for a cylindrical reactor model using the actual axial core power distribution, and ¢(r) is the one-dimensional solution for a cylindrical reactor model using the same source per unit height as that used in the r,0 two-dimensional calculation.

For the reactor internals, a slightly different fluence rate synthesis technique has been used:

¢(r,0,z)=Max[¢(r,0)x ¢~~~;) ,¢(r,0)x ¢(~(~Flat]

Where¢(r,0,z), ¢(r,0), ¢(r,z), and ¢(r) are the same as defined in the paragraph above. </J(r, z)Fla, is the two-dimensional solution for the same cylindrical reactor model as used in the ¢(r,z) calculation, but using a flat axial core power distribution with the downcomer reactor coolant density for the bottom half of the core and the outlet plenum 'reactor coolant density for the top half of the core, respectively. This special treatment is for better solutions for the reactor internals components above and below the 'active core. It is well known that the axial power distribution from the core design calculations have large uncertainties in the regions close to the top and bottom of the core. It is also well known that the top and bottom reactor internals components are only sensitive to the top and bottom six inches to one foot of the core and source conditions, due to their proximity to the core. Therefore, using the downcomer reactor coolant density for the bottom half core and outlet reactor coolant density for the top half of the core provides best-estimate top and bottom core conditions for the transport calculations on the reactor internals components above and below the active core. Further, the axial power distribution from the core design calculations tends to drop off at the locations close to the top and bottom of the active core, whereas the flat axial power distribution assumes a uniform power distribution through the axial length of WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-2 the active core. The flat axial power distribution ensures that conservatism has been included where the simulated source conditions with large uncertainties are encountered, especially above and below the active core. For the radial reactor internals components, however, the actual axial power distribution has been used, because it provides best estimate fast neutron fluence for the radial reactor internals near core midplane. Once the two sets of 2D/1D SYNTHESIS transport solutions are calculated, the solution with the higher fluence rate from the two synthesis techniques is used to generate the final three-dimensional solution for the reactor internals components.

In performing the fast neutron exposure evaluations for the selected Westinghouse 3-loop reactors, plant-specific forward transport calculations were carried out to directly solve for the space- and energy-dependent scalar flux, ~(r,0,z,E), consistent with requirements of Regulatory Guide 1.190 (Reference 1).

For this analysis, all of the transport calculations were carried out using a two-dimensional discrete ordinates code, DORT (Reference 4), and the BUGLE-96 cross-section library (Reference 5). The BUGLE-96 library provides a coupled 47-neutron and 20-gamma-ray group cross-section data set produced specifically for light water reactor (LWR) applications. In these analyses, anisotropic scattering was treated with a P5 Legendre expansion and the angular discretization was modeled with an S16 order of angular quadrature. Energy- and space-dependent core power distributions were treated on a fuel-cycle-specific basis.

ThJ IJla!]. vie~ of t_lle r,0 _pO_RT geometric modeLof the selected Westinghouse 3-loop units' reactor geometry at the core midplane is shown in Figure 2.1-1. In Figure 2.1-1, a single octant is depicted showing the arrangement of thermal shield and .surveillance capsule attachments. In addition to the core, upper and lower reactor internals, reactor pressure vessel, and primary biological shield, the models developed for these octant geometries also included explicit representations of the stainless steel former plates, surveillance capsules, the reactor pressure vessel cladding, the reactor pressure vessel reflective insulation, shield tank, and the reactor cavity liner plate.

From a neutrons standpoint, the inclusion of the surveillance capsules and associated support structure in the analytical model is significant for reactor vessel fluence calculation. Since the presence of the capsules and structure has a marked impact on the magnitude of the neutron fluence rate as well as on the relative neutron and gamma ray spectra at dosimetry locations within the capsules, a meaningful evaluation of the radiation environment internal to the capsules can be made only when these perturbation effects are properly accounted for in the analysis. However, for the fast neutron fluence calculations on the reactor internals, it is negligible, because most of the radial reactor internals components,i if not all, are inside the thermal shield. The reactor internals fluence values reported in this work are takert from the r,0 model with surveillance capsules.

A section view of the r,z model of the selected Westinghouse 3-loop reactors is shown in Figure 2.1-2.

The model extended radially from the centerline of the reactor core out to a location interior to the primary biological shield (a radius of 411.480 cm) and over an axial span of -338.525 cm to +343.460 cm with respect to the midplane of the active core. The reactor vessel nozzles are not modeled.

In developing the DORT r,0 and r,z geometry analytical models of the reactor shown in Figure 2.1-1 rand Figure 2.1-2, nominal design dimensions were employed for the various structural components. Cycle-dependent water temperatures and, hence, coolant density in the reactor core and downcomer regions of WCAP-18353-NP October 2018 Revision 0

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__j

Westinghouse Non-Proprietary Class 3 2-3 the reactor were taken to be representative of full-power operating conditions. The reactor core was treated as a homogeneous mixture of fuel, cladding, water, and miscellaneous core structures such as fuel assembly grids, guide tubes, etc.

The DORT r,0 geometric reactor model shown in Figure 2.1-1 consisted of 176 radial by 168 azimuthal intervals. The DORT r,z geometric model shown in Figure 2.1-2 consisted of 193 radial by 176 vertical intervals. For both DORT r,0 and r,z models, mesh sizes were chosen to ensure sufficient resolution of the stair-step-shaped baffle plates and an adequate number of mesh throughout radial and axial regions of interest. The pointwise inner iteration convergence criterion utilized in the calculations was set at a value of0.001.

The core power distributions used in the plant-specific transport analysis for the selected Westinghouse 3-loop plant units were taken from appropriate design documentation. The data extracted included fuel assembly-specific initial enrichments, beginning-of-cycle burnups, and end-of-cycle bumups. Appropriate axial distributions were also obtained.

For each fuel cycle of operation, the fuel assembly-specific enrichment and burnup data were used to generate the spatially-dependent neutron source throughout the reactor core. This source description included the spatial variation of isotope-dependent (U-235, U-238, Pu-239, Pu-240, Pu-241, and Pu-242) fission spectra, neutron emission rate per fission, and energy release per fission based on the burnup history. ofindividual-fuel assemblies.~These fuel-assembly-specifie neutron-source-strengths derived from-the detailed isotopics were then converted from fuel pin Cartesian coordinates to the spatial mesh arrays used in the DORT 2D/1D SYNTHESIS discrete ordinates calculations.

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Westinghouse Non-Proprietary Class 3 2-4

,~

q-o-

t o-t ..,.

o-

~-

N_

o-8 N .

50.0 100.0 \50.0 200.0 250.0 JOO.O J50. 0 Ccml Figure 2.1-1 Plan View of the Selected Westinghouse 3-Loop Plant Reactor Geometry at the Core Midplane with Surveillance Capsules WCAP-1 8353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-5 so.o 100.0 150.0 200.0 250.o 300.0 3so.o 400.0 R

[cm]

Figure 2.1-2 The selected Westinghouse 3-Loop Plant r,z Reactor Geometry WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-6 2.2 REACTOR INTERNALS UPPER CORE PLATE, AND UPPER SUPPORT PLATE FLUENCE EXPOSURE The maximum fast neutron (> 1.0 MeV) fluence at the bottom and top surfaces of the reactor internals upper core plate (UCP) and upper support plate (USP) are also reported in this section in Table 2.2-1 and Table 2.2-2.

Table 2.2-1 Maximum Fast Neutron(> 1.0 MeV) Fluence at the Selected Westinghouse 3-Loop Plant Unit 1 UCP Bottom, Top Surfaces and USP [n/cm 2]

Irradiation Time (EFPY) UCPBottom UCPTop USP 51.6 l.59E+21 9.10E+20 < 1E+20 72 2.24E+21 l.28E+21 < 1E+20 Table 2.2-2 Maximum Fast N.eutron (> 1.0 MeV) Fluence at the Selected Westinghouse 3-Loop Plant Unit 2 UCP Bottom, Top Surfaces and USP [n/cm 2]

Irradiation Time (EFPY) UCPBottom UCPTop USP 52.8 l.64E+21 9.37E+20 < 1E+20 72 2.24E+21 l.28E+21 < 1E+20 WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-7 2.3 REACTOR INTERNALS FAST NEUTRON FLUENCE MAP AT 60 YEARS OPERATION (UNIT 1 AT 51.6 EFPY, UNIT 2 AT 52.8 EFPY)

The r,0 plan view and r,z cross section view fast neutron fluence contour maps for the selected Westinghouse 3-loop plant Units 1 and 2 at 60 years (51.6 EFPY and 52.8 EFPY, respectively) end oflife (EOL) are presented in Figure 2.3-1 through Figure 2.3-8. The r,0 plan view plots are generated using the fast neutron fluence contour maps at the core midplane and the r,z cross section view plots are generated at 0 = 0°. Please note that the reactor vessel internals geometry overlay on the neutron fluence contours in those figures are just for visualization purposes, and should not be used for any quantitative determination of the fluence level.

There are local peaks on the tluence contours on the cross section views (for example, Figure 2.3-2) at the top of the upper core plate and bottom of the lower core plate at radius around R = 170 cm. This is because the upper and lower core plates have two regions, A and B, as labeled in Figure 2.1-2. Region A is a mixture of reactor coolant water and stainless steel due to coolant flow penetration channels in this region. Region B has no flow penetrations, and is 100 percent stainless steel. The stainless steel is less effective at shielding the fast neutrons because it stops neutrons mostly by inelastic scattering. A similar effect, to a lesser extent, is observed at each former plate location where the fluence contour extends slightly in the radial direction.

It has been observed that the reactor internals fluence is reduced by a factor of about 31.5 in the radial direction over 20 cm at the core mid plane due to the presence of the core baffle plate and core barrel. Fluence is reduced by a factor of about 12.5 at the locations above the core due to the presence of the upper core plate, and locations below the core due to the presence of the lower core plate.

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Westinghouse Non-Proprietary Class 3 2-8

....n 150 lOO 50 lOO JOO 400 Figure 2.3-1 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY)

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Westinghouse Non-Proprietary Class 3 2-9

>5.0E+22 1.3E+22. Mt:+22)

(l .OE+22. 1.3E+Z1')

200 (l.OE+21. 2.cJE.t.21)

(6.7E+20.1.IJE.t21)

(1.3E+20. 6.7E+n c1.oe+20. 1.3E+n 1.0E+20 l00 n

._ 0 t,q

-l00

-200 50 l00 150 200 250 300 350

% fc*J Figure 2.3-2 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY)

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Westinghouse Non-Proprietary Class 3 2-10 5.0E+22 1.3E+ 22. MlE+22)

( 1.0E+22, 1.31:+22)

(1.0E+21. 2.CE+21)

(l .3E+2J. 6.7E+21ll 1.0E+20. 1.31:+:IQ 1.0E+20 ft 0 50 100 150 200 250

% (ca}

Figure 2.3-3 Top Half Core Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY)

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Westinghouse Non-Proprietary Class 3 2-11 0

-50

-100

...ft

-150

-200

-250 50 100 150 200 250

% (cJ Figure 2.3-4 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 9 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 60 Years EOL (51.6 EFPY)

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Westinghouse Non-Proprietary Class 3 2-12 300 250 200

! HO

~

JOO 50 50 JOO JSO 200 250 300 350 z (ca]

Figure 2.3-5 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-13 5.0E+22 1.3E+22. 5.0E+22) 1.0E+22. 1.3E+22) 200

,-(2.0E+21. 1DE+ 22) 1.0E+2I. 2DE+21) 6.7E+a>, 1.0E+21) 1.3E+a>, 0.7E+D 1.0E+a>. 1.3E+2J) 1.0E+a>

100 n

..... 0 llq

-100

-200 100 200 300 400

% fc*J Figure 2.3-6 Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-14

~.OE+22 1.3E+22 5.0E+22) 1.0E+21. 2.0E+21)

C6.7E+D. 1.ll:+21) 1.3E+D 6 .7E+2J)

(1.0E+D. 1.3E+:lQ 1.0E+D

....e so 100 150 200 250

.z fc:*J Figure 2.3-7 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-15 0

l.3E+22. ~22) 1.oE+22. 1.3E+22) 21, 1.oE+ZZ) 1.oE+21. 2.(£+21) -50

.7E+a'.l 1££+21) 1.3E+a'.l. 6.7E+a'.lJ 1.oE+a'.l. 1.3E+!lll)

I.OE+a'.l

-JOO

....ft

-J50

-200

-250 0 50 JOO J50 200 250

% [c J Figure 2.3-8 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 60 Years EOL (52.8 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-16 2.4 REACTOR INTERNALS FAST NEUTRON FLUENCE MAP AT 80 YEARS OPERATION (72 EFPY)

The r,0 plan view and r,z cross section view fast neutron fluence contour maps for the selected Westinghouse 3-loop plant Units 1 and 2 at 80 years (72 EFPY) end of life (EOL) are presented in Figure 2.4-1 through Figure 2.4-8. The r,0 plan view plots are generated using the fast neutron fluence contour maps at the core midplane and the r,z cross section view plots are generated at 0 = 0°. Please note that the reactor vessel internals geometry overlay on the neutron fluence contours in those figures are just for visualization purposes, and should not be used for any quantitative determination of the fluence level.

There are local peaks on the fluence contours on the cross section views (for example, Figure 2.3-2) at the top of the upper core plate and bottom of the lower core plate at radius round R = 170 cm. This is because the upper and lower core plates have two regions, A and B, as labeled in Figure 2.1-2. Region A is a mixture of reactor coolant water and stainless steel due to coolant flow penetration channels in this region. Region B has no flow penetrations, and is 100 percent stainless steel. The stainless steel is less effective at shielding the fast neutrons because it stops neutrons mostly by inelastic scattering. A similar effect, to a lesser extent, is observed at each former plate location where the fluence contour extends slightly in the radial direction.

It has been observed that the reactor internals fluence is reduced by a factor of about 31.5 in the radial direction over 20 cm at the core midplane due to the presence of the core baffle plate and core barrel. Fluence is reduced by a factor of about 12.5 at the locations above the core due to the presence of the upper core plate, and locations below the core due to the presence of the lower core plate.

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-17

l50 aoo

. l50 100 50 0

0 100 200 300 400

.r {ca]

Figure 2.4-1 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY)

WCAP-1 8353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM . (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-18 5.0E+22 (1.3E+22. 5.Cl:+22')

Cl.OE+22. 1.3E+22')

200 (1.0E+21, 2.Cl:+21)

(6.7E+20. 1.Cl:-+21)

(1.3E+20. 6.7E-t~

(l.OE+20. 1.3E-t~

I.OE+20 100 n

..... 0

-100

-200 50 100 150 200 2 50 300 3 50 i [ca]

Figure 2.4-2 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-19 250 1.3E+22. 5.0E+22) 1.0E+21 . 2.0&21)

.7E+21l. 1.0E+21) 200 1.3E+21l. 6.7E+DJ l.0E+21l. 1.3&:D I.Of+21l 150

...n Iii 100 50 0

0 50 100 150 200 250 300 1C [ca]

Figure 2.4-3 Top Half Core Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-20 0

-50

-JOO

...ft

-150

-200

-250 0 so 100 150 200 250 300

% [ca]

Figure 2.4-4 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 1 at 80 Years SLR (72 EFPY)

WCAP-1 83 S3-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-21 350 1.3E+22. ~OE+:22>

I .OE+22. 1.3E+22) 300 1.0E+21. 2.0E+21)

.7E+:10, 1.0E+21) 1.3E+:i!O 6.7E+DJ 1.0E+:10. 1.lf+n 1.0E+:10 250

.... 200

...n 150 100 50 0

0 so 100 150 200 250 300 350

% /ca]

Figure 2.4-5 Plan View Fast Neutron Fluence Map at Core Midplane for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY)

WCAP-1 8353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-22 5.0E-t-22 (1.3E-t22 ~.oe+22)

(1.~-t-22. 1.3E+22) 200 (1 -~-+-21. 2.cE+21)

(1 .3E-tID. 0.7E-tal)

(1 .0E-+-ID. 1.3E+al) 1.0E-tID 100 0

-100

-200 0 50 100 150 200 250 300 z [ca}

Figure 2.4-6 Cross Section View Fast Neutron Fluence Map at 0 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY)

WCAP-1 8353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 /Wi. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-23 300 5.0E+22 l.3E+22. 5.cE+22) 1.oe+ 22. 1.3Ei-22>

250 l.oE+21 . 2.0f+21) l.3E+:.O 0.7E+:lOJ l.oE+:.0. l.3E+:ll)

< 1.0E+2J 200

! 150 lOO 50

\I 0

0 50 100 150 200 250 300

% (a*J Figure 2.4- 7 Top Half Core Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-24 0

!I.OE+22 1.3E+22. !I.OE+ Zl'J

-50 1.0E+21. 2.cl:+21) 6.7E+20. 1.cl:+21) 1.3E+ 20. 6.7E+ 2JJ 1.0E+:.10. l .3E+2J) 1.ll:+:IO

-100

! -150 lq

-200

-250

-300 0 50 100 150 200 250 300

% (oJ Figure 2.4-8 Bottom Half Core Cross Section View Fast Neutron Fluence Map at 8 = 0° for the Selected Westinghouse 3-Loop Plant Unit 2 at 80 Years SLR (72 EFPY)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-25 2.5 FIGURE OF MERIT AND POWER DENSITY Reference 13 documents the figures of merit (FOM) and power densities of the selected Westinghouse 3-loop plant Units 1 and 2 for the purpose of MRP-227-A applicability evaluation (Reference 14). The results from Reference 13 are presented below in Table 2.5-1 and Table 2.5-2. Please note that Reference 13 assumed Unit 1 fuel Cycles 21 through 24 and Unit 2 fuel Cycles 20 through 23 had a rated power of 2940 MWt. This is a conservative estimate for each fuel cycle.

Table 2.5-1 Unit 1 Power Density and Figures of Merit [W/cm 2]

Unit 1 U1C21 U1C22 U1C23 U1C24 Max Limit Margin to Limit (%)

Power Density 110.76 110.76 110.76 110.76 110.76 124.00 11.95 A (Type 1)° 61.25 59.37 57.66 59.12 61.25 68.00 11.02 B (Type 2)

  • 60.86 58.27 54.00 61.56 61.56 68.00 10.47 C (Type 2)
  • 58.78 55.10 62.31 67.06 67.06 68.00 1.40
  • For definition please see Reference 14 Table 2.5-2 Unit 2 Power Density and Figures of Merit [W/cm 2]

Unit 2 U2C20 U2C21 U2C22 U2C23 Max Limit Margin to Limit(%)

Power Density 110.76 110.76 110.76 110.76 110.76 124.00 11.95 A (Type 1)" 62.06 61.47 61.90 67.17 67.17 68.00 1.24 B (Type 2)

  • 56.40 58.95 58.52 58.10 58.95 68.00 15.36 C (Type 2)
  • 53.36 56.06 55.07 50.89 56.06 68.00 21.29
  • For definition please see Reference 14 WCAP-18353-NP October 2018 Revision 0
      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-26 2.6 REACTOR INTERNALS COMPONENTS MATERIAL RELIABILITY PROGRAM (MRP) FLUENCE SCREENING Four different radiation-related aging mechanisms, one of which is broken into two subcategories for irradiation embrittlement, have been investigated in this analysis: stress relaxation (SR) in bolts, irradiation embrittlement (IE) in cast austenitic stainless steel (CASS), IE in austenitic stainless steel, irradiation-assisted stress corrosion cracking (IASCC), and void swelling (VS).

The fast neutron fluence (E> 1.0 MeV) ranges described in MRP-175 (Reference 10) are:

~ l .3xl 0 22 n/cm2 ( ~20 dpa) MRP-175 screening threshold for void swelling

~ 2xl0 21 n/cm2 (~3 dpa) MRP-175 minimum dose IASCC (requires 89 ksi stress)

~ Ix10 21 n/cm 2 (~1.5 dpa) MRP-175 screening threshold for IE in austenitic stainless steel

~ 6.7 xl020 n/cm2 (~1 dpa) MRP-175 screening threshold for IE CASS

~ 1.3xl 0 20 n/cm2 ( ~0.2 dpa) MRP-175 screening threshold for stress relaxation in bolts

< 1.3x1020 n/cm2, low fluence The fast neutron fluence (E> 1.0 MeV) ranges described in MRP-191 Rev. 1 (Reference 6) are:

n/cm2 MRP-191 conservative screening threshold for stress 20 Region 1: cp < 1x 10 relaxation in bolts Region 2: lx10 n/cm2 (0.15 dpa) ~ cp < 7xl020 n/cm MRP-191 conservative screening 20 2 threshold for IASCC Region 3: 7x10 n/cm (I dpa) ~ cp < lx10 n/cm 2 20 2 21 Region 4: lxl0 21 n/cm2 (1.5 dpa) ~ cp < lx10 22 n/cm 2 Region 5: lx10 n/cm 2 (15 dpa) ~ cp < 5x1022 n/cm MRP-191 conservative screening 22 2 threshold for void swelling and screening threshold for IASCC without effective stress Region 6: 5x10 n/cm (75 dpa) ~ cp 22 2 In this analysis, a combination of the MRP-175 and MRP-191 fluence ranges was used:

cp < Ixto 20 n/cm 2 (0.15 dpa) lxl0 20 n/cm 2 (0.15 dpa) ~ <p < 1.3x1020 n/cm 2 (0.2 dpa) 1.3xl020 n/cm 2 (0.2 dpa) ~ <p < 6.7xl0 20 n/cm2 (1 dpa) 6.7xl0 20 n/cm2 (1 dpa) ~ cp < lx10 21 n/cm2 (1.5 dpa) lx1021 n/cm2 (1.5 dpa) ~ <p < 2x10 21 n/cm2 (3 dpa) 2xl0 21 n/cm 2 (3 dpa) ~<p < lx10 22 n/cm2 (15 dpa) lx10 22 n/cm 2 (15 dpa) ~ <p < l.3xl0 22 n/cm2 (20 dpa) l.3xl0 22 n/cm2 (20 dpa) ~ <p < 5xl022 n/cm 2 (75 dpa) 5x1022 n/cm 2 (75 dpa) ~ <p WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-27 The reactor internals components at the selected Westinghouse 3-loop plant, Units 1 and 2, were identified in Reference 17. Herein, these components were compared to the fast neutron fluence maps presented in Sections 2.3 and 2.4 in order to determine the fast neutron fluence levels on the components at 60 years (51.6 EFPY for Unit 1 and 52.8 EFPY for Unit 2) and 80 years operation (72 EFPY) in support of the SLR. The results are presented in Table 2.6-1 through Table 2.6-4, where X's mark the selected Westinghouse 3-loop plant specific component fluence ranges and O's mark the industry component fluence ranges from Reference 15.

The fluence maps for 51.6 EFPY and 72 EFPY for Unit 1 of the selected Westinghouse 3-loop plant are similar and the fluence maps for 52.8 EFPY and 72 EFPY for Unit 2 of the selected Westinghouse 3-loop plant are similar. This can be seen by comparing the maps in Section 2.3 and 2.4. The evaluated fluence levels for the various components are the same between 51.6 EFPY and 72 EFPY for Unit 1 and the same between 52.8 EFPY and 72 EFPY for Unit 2, except for the following components:

o Guide tube support pins o Support pin nuts

  • Upper Support Column Assemblies:

o Column bases

  • Baffle and Former Assembly:

o Baffle plates o Former plates

  • Bottom Mounted Instrumentation (BMI) Column Assemblies:

o BMI column collars

  • Lower Core Plate and Fuel Alignment Pins:

o Lower core plate

  • Neutron Panels / Thermal Shield:

o Thermal shield or neutron panels WCAP-18353-NP October 2018 Revision 0

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Westinghouse Non-Proprietary Class 3 2-28 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit I at 51.6 EFPY<1l lxl020 1.3xl020 2x10 21 lxl022 n/cm2 n/cm 2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable Sq,< Sep< S ep< S ep <

1.3x1020 6.7x1020 lxl 022 l.3x1022 n/cm 2 n/cm2 n/cm 2 n/cm2 Control Rod Upper Guide Tube Anti-rotation Internals Assemblies and studs and nuts 304 ss Yes x,o Assembly Flow Downcomers Anti-rotation studs and nuts 316 ss No Bolts 316 ss Yes x,o Bolts 304 ss No C-tubes 304 ss Yes x,o X,O x,o 0 Enclosure ins 304 ss Yes x,o Upper guide tube enclosures 304 ss Yes x,o x,o x,o 0 Upper guide tube CFS No enclosures Flanges-intermediate 304 ss Yes x,o Flanges-CFS No intermediate Flan es - lower 304 ss Yes X,O 0 0 Flan es - lower CFS No Flexureless 304SS No inserts Flexures AX-750 No Guide

!ates/cards 304 ss Yes x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-29 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY(ll lxl040 l.3xt02° 2x10 21 lxl022 2 2 n/crn 2 n/cm2 n/crn n/cm Assembly Subassembly Component Material Applicable ~ q> < :S q> <  ::: (j) <  ::: (j) <

1.3xl a2° 6.7x1020 lx1022 1.3x1022 n/cm2 n/cm2 n/cm2 n/cm2 Control Rod Upper Guide Tube Guide Internals Assemblies and 316L SS No p!ates/cards Assembly Flow Downcomers Guide CFS No

!ates/cards Guide tube AX-750 No 316 ss Yes X x,o x,o x,o 304 ss Yes X,O CFS No Inserts 304 ss No Lock bars 304 ss Yes x,o Sheaths 304 ss Yes x,o x,o x,o 0 Support pin cover late 316 ss No Support pin cover plate cap 316 ss No screws Support pin cover plate 304 ss No locking caps and tie stra s Su Ort in nuts AX-750 No 316 ss Yes X x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-30 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY0 >

lxl020 1.3xHi0 2xl021 lxl0 22 2 2 2 2 n/cm n/cm n/cm n/cm Assembly Subassembly Component Material Applicable :5 q, < :5 q> < :5 q, < :Sq, <

20 20 22 1.3xl0 6.7x10 lxl0 1.3x1022 2

n/cm2 n/cm2 n/cm n/cm2 Control Rod Upper Guide Tube Water flow slot Internals Assemblies and ligaments 304 ss Yes x,o x,o x,o 0 Assembly Flow Down comers Mixing Devices Mixing devices 304 ss No Mixing devices CFS Yes x,o x,o x,o x,o x,o Upper Core Fuel Plate and Fuel alignment pins 316 ss No Alignment Pin Fuel ins 304 ss Yes x,o x,o X,O x,o late 304 ss Yes 0 0 X,O x,o x,o 0 304 ss No Protective skirt 316 ss No bolts Protective skirt 304 ss No lock bars Protective skirt dowel ms 304 ss No Protective skirt 316 ss No dowel ms WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-31 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit I at 51.6 EFPY< 1l 21 22 lxl020 1.Jx.1020 2xl0 lx10 2 2 n/cm2 n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable :S q> < . :S cp < :S cp < :S cp <

22 l.3xl020 6,7xl020 lx10 I.3x10 22 n/cm2 n/cm2 n/cm2 n/cm2 Upper Upper Instrumentation Internals Conduit and Bolting 316 ss Yes x,o Assembly Supports Boltin 304 ss Yes X,O Brackets, clamps, terminal blocks, and 304 ss Yes x,o x,o x,o 0 conduit stra s Brackets, clamps, terminal blocks, and 302 ss No conduit stra s Brackets, clamps, terminal blocks, and CFS Yes x,o x,o x,o 0 conduit stra s Conduit seal assembly - body, 304 ss Yes x,o tubesheets Conduit seal assembly - tubes 304 ss Yes x,o Conduits 304 ss Yes x,o x,o x,o 304 ss Yes X,O 304 ss No 304L SS Yes X,O 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-32 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY<1>

lx1020 1.3xl020 2x1021 lxl0 22 n/cm 2 n/cm2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable $ cp < :Sq> < $ cp <  :::; cp <

1.3x10 20 6.7xl020 lxl0 22 1.3xl022 n/cm 2 n/cm2 n/cm2 n/cm2 Upper UHI flow Internals Upper Plenum CFS No column bases Assembly UHI flow 304 ss No columns Upper Support Column Adapters 304 ss Yes x,o Assemblies Bolts 316 ss Yes x,o x,o x,o X, O Column bases 304 ss No Column bases CFS Yes X X,O 0 0 Column bodies 304 ss Yes x,o x,o X,O Extension tubes 304 ss Yes x,o 304 ss Yes X,O 304 ss Yes X,O 0 0 304L SS No Nuts 304 ss Yes x,o Nuts 302 ss Yes X, O Upper Support Plate Assembly Bolts 316 ss Yes x,o 1---------+-----+-----+----+------+----+------+----+----+----+-----+-----4 Dee beam ribs 304 ss Yes x,o Deep beam stiffeners 304 ss Yes x,o 304 ss No CFS No Inverted top hat 304 ss No ITH flan e WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM . (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-33 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY(ll lxl02°' l.3x1020* 2xl021 lx10 22 2 2 n/cm n/cm 2 n/cm n/cm2 Assembly Subassembly Component Material Applicable  :$ cp < :S tp < :5 q> < :5 q> <

1.3x1020 6.7:x,1/4020 lxl 022 l.3x10 22 n/cm2 n/cm2 n/cm 2 n/cm2 Upper Inverted top hat Upper Support Internals Plate Assembly (ITH) upper 304 ss No Assembly SU ort late Lock ke s 316 ss No 304 ss Yes X,O 304 ss Yes X,O Upper SU ort late 304 ss Yes x,o Upper CFS No SU ort late Upper support rin or skirt 304 ss Yes x,o Upper support CFS No rin or skirt Lower Baffle and Baffle bolting Internals Former lock devices 304 ss Yes X X X,O X,O x,o x,o X,O Assembly Assembly Baffle-ed e bolts 316 ss Yes 0 X,O X,O X,O x,o Baffle-ed e bolts 347 ss No Baffle !ates 304 ss Yes 0 0 x,o x,o X,O x,o x,o Baffle-former bolts 316 ss Yes 0 x,o x,o X,O x,o Baffle-former bolts 347 ss No Barrel-former bolts 316 ss Yes x,o x,o x,o x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-34 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY(J) lxl020 1.3xia2° 2x1021 lx10 22 2

n/cm2 n/cm2 2 n/cm n/cm Assembly Subassembly Component Material Applicable S ep < Sq,< S ep< S ep <

l.3x10 22 22 1.3xl020 6.7xl020 lx10 2

n/cm n/cm2 n/cm2 n/cm2 Lower Baffle and Barrel-former Internals Former bolts 347 ss No Assembly Assembly Former !ates 304 ss Yes 0 x,o X,O x,o x,o X,O X,O Bottom Mounted BMI column Instrumentation bodies 304 ss Yes x,o (BMI) Column Assemblies BMI column bolts 316 ss Yes x,o 0 0 0 BMI column collars 304 ss Yes x,o x,o 0 BMI column cruciforms 304 ss No BMI column cruciforms CF8 Yes x,o 0 0 0 BMI column extension bars 304 ss Yes X,O x,o x,o x,o x,o x,o x,o x,o BMI column extension tubes 304 ss Yes x,o BMI column lock ca s 304L SS Yes x,o 0 0 0 BMI column nuts 304 ss Yes x,o x,o x,o Core barrel Core Barrel flan e 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-35 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY< 1>

lxl020 1.3xlQ~0 2xl021 l x l022 n/cm 2 n/cm2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable :S ep < :Sep<  ::; q> < :S q> <

1.3xl020 6.7x1020 lx1022 l.3x1022 n/cm 2 n/cm2 n/cm 2 n/cm 2 Lower Core barrel lnternals Core Barrel outlet nozzles 304 ss Yes x,o Assembly Upper core barrel (includes UFW, UGW, and 304 ss Yes x,o x,o 0 UAW Lower core barrel (includes LGW,LFW, 304 ss Yes x,o x,o x,o x,o x,o x,o 0 0 MAW,and LAW Diffuser Plate Diffuser Plate 304 ss No Flux Thimbles Flux thimble 304 ss No (Tubes) tube Ju s Flux thimble tube Ju s 308 ss Yes x,o Flux thimble tube Ju s 316 ss No Flux thimble A600 No tube Ju s Flux thimbles tubes 316 ss Yes x,o x,o x,o x,o x,o x,o x,o X,O X,O Flux thimbles A600 No (tubes)

Head Cooling Head cooling S ra Nozzles s ra nozzles 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-36 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY 1

MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY<>

lxl020 1.3xl020 2x10 21 lx10 22 2 2 2 2 n/cm n/cm n/cm n/cm Assembly Subassembly Component Material Applicable :Sq, < ~cp< :s q>< :sq><

l.3xJ020 6.7x10:zo lx10 22 1.3x1022 n/cm2 n/cm2 2

n/cm2 n/cm Lower Irradiation Irradiation Internals Specimen specimen guide 304 ss Yes x, o x,o x,o Assembly Guides Irradiation specimen guide 316 ss No bolts Irradiation specimen lock 304L SS No 304 ss Yes X,O Lower Core Fuel alignment Plate and Fuel pins 304 ss Yes x,o x, o X, O 0 Alignment Pins Fuel alignment ins 316 ss No LCP-fuel alignment pin 316 ss No bolts LCP-fuel alignment pin 304L SS No lock ca s Lower core late 304 ss Yes 0 0 X, O x,o x,o 0 XL lower core 304 ss No late Lower Support Lower support Column column bodies CFS Yes x,o x,o x,o x,o x,o x,o 0 0 Assemblies WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM . (This statement was added by the PRIME system upon-its val idation)

Westinghouse Non-Proprietary Class 3 2-37 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY 0 >

lxl020 1.3xt<>2° 2x10 21 lxl 0 22 2 2 n/cm 2 2 n/cm n/cm n/cm Assembly Subassembly Component Material Applicable $ q> < Sq>< Sep<  ::: <p <

1.3x1020 6.7x1020 lx10 22 1.3x1022 n/cm2 n/cm2 n/cm 2 n/cm2 Lower Lower Support Lower support Internals Column column bodies 304 ss No Assembly Assemblies Lower support 304 ss No column bolts Lower support column bolts 316 ss Yes x,o x,o x,o Lower support 304 ss Yes X 0 0 0 column nuts Lower support column sleeves 304 ss Yes x,o 0 Lower Support Lower support Casting or CFS No casting Forging Lower SU 304 ss Yes x,o Neutron Panels Neutron panel ffhermal bolts 316 ss No Shield Neutron panel lock ca s 304 ss No Neutron panel 304L SS No lock ca s Thermal shield bolts 316 ss Yes x,o x,o x,o Thermal shield dowels 316 ss Yes x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-38 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 Efpy<1>

21 22 lxl020 1.3xl020'. 2x10 lxl0 2 2 n/cm 2 n/em2 n/cm n/cm Assembly Subassembly Component Material Applicable :5 q, < ~ cp < :S <p < :S <p <

1.3xl020 6.7x102iJ lx10 22 l.3x10 22 n/cm2 n/cm2 n/cm 2

n/cm 2

Lower Neutron Panels Thermal Internals /Thermal shield dowels 304 ss Yes x,o x,o x,o Assembly Shield Thermal shield flexures 304 ss No Thermal shield flexures 316 ss Yes x,o x,o x,o Thermal shield or neutron anels 304 ss Yes x,o x,o x,o X,O 0 0 Radial Radial support Support Keys ke bolts 304 ss No Radial support ke bolts 316 ss Yes x,o Radial support ke lock ke s 304 ss Yes x,o Radial SU ort ke s 304 ss Yes x,o Secondary Core Support (SCS)

SCS base plate 304 ss Yes x,o Assembly SCS bolts 316 ss Yes x,o SCS energy absorber 304 ss Yes x,o scs t 304 ss Yes x,o CFS No 304 ss Yes X,O CFS No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-39 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY 0 >

1x102Q 1.3xto2° 2xl021 lxl0 22 2

2 n/cm2 2

n/cm n/cm n/cm Assembly Subassembly Component Material Applicable :S ep < :Sq,< :5 <p < :S ep <

1.3xl<i° 6.7xl020 lxl022 l.3xl022 n/cm2 n/cm2 n/cm2 n/cm2 Secondary Lower Core Support Internals (SCS)

SCS lock keys 304 ss Yes x,o Assembly Assembly Upper and lower tie !ates 304 ss Yes x,o Interfacing Interfacing Clevis insert Components Components bolts AX-750 Yes x;o Clevis insert lock ke s A600 Yes x,o Clevis insert lock ke s 316 ss No Clevis inserts A600 Yes x,o Clevis inserts 304 ss No Clevis inserts Stellite Yes x,o Clevis insert dowe1s<2>

A600 Yes x,o Clevis bearing Stellite wear Stellite Yes X,O surface< 2>

Head and vessel alignment pin 316 ss Yes x,o bolts Head and vessel alignment pin 304L SS Yes x,o lock cu s Head and vessel 304 ss Yes x,o WCAP-1 8353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-40 Table 2.6-1 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 51.6 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 51.6 EFPY<1l lxl020 1.3xl010 2xl0 21 lxl0 22 n/cm 2 n/cm2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable :s; cp < ~ q> < :S q> < :S q> <

1.3x1020 6.7x10io l xl0 22 l.3x10 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Internals Interfacing Interfacing Components Components hold-down 304 ss Yes x,o s rin Internals hold-down 403 ss No s rin Upper core plate ali ment ins 304 ss Yes x,o x,o x,o 0 Thermal sleeves<3l 304 ss Yes x,o Notes:

(1) Components with multiple X's and O's indicate components that span more than one fluence range, where all applicable fluence ranges are noted.

(2) The clevis insert dowels and clevis bearing Stellite wear surface have been added as seen within Table 5-14 of Reference 18. Both of these components are located with the clevis insert, between the lower core support and vessel. These components fall into the lowest fluence range based on location.

(3) The thermal sleeves have been added as seen within Table 5-14 of Reference 18. This component is located above the upper internals and falls into the lowest fluence range based on location.

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-41 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPv< 1l lxl0 20 1.3x102<1 2x10 21 lx1022 n/cm2 n/cm2 2 2 n/cm n/cm Assembly Subassembly Component Material Applicable $ q, < ~q><  :'.:: q> <  :'.:: q> <

1.3x1020 6.7x10 20 lx10 22 l.3x10 22 n/cm2 n/cm 2 n/cm 2 n/cm2 Control Rod Upper Guide Tube Anti-rotation studs Internals Assemblies and and nuts 304 ss Yes x,o Assembly Flow Downcomers Anti-rotation studs and nuts 316 ss No Bolts 316 ss Yes x,o Bolts 304 ss No C-tubes 304 ss Yes X,O x,o x,o 0 Enclosure ins 304 ss Yes X,O Upper guide tube enclosures 304 ss Yes x,o x,o x,o 0 Upper guide tube CFS No enclosures Flanges-intermediate 304 ss Yes x,o Flanges -

CFS No intermediate Flan es - lower 304 ss Yes X,O 0 0 Flan es - lower CFS No Flexureless inserts 304SS No Flexures AX-750 No Guide !ates/cards 304 ss Yes X,O 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-42 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY(I) lx1020 l.3xl020* 2xl02 1 l x l022 2 2 2 n/cm n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable ~ q> < $ cp < ~ q> < ~ cp <

1.3x1020 6.7xl020 lxl022 1.3x l0 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Control Rod Upper Guide Tube Internals Assemblies and Guide plates/cards 316L SS No Assembly Flow Down comers Guide Iates/cards CFS No Guide tube AX-750 No ins 316 ss Yes x,o x,o x,o

!ates 304 ss Yes X,O CFS No Inserts 304 ss No Lock bars 304 ss Yes x,o Sheaths 304 ss Yes x,o x,o x,o 0 Support pin cover late 316 ss No Support pin cover late ca screws 316 ss No Support pin cover plate locking caps 304 ss No and tie stra s Su AX-750 No 316 ss Yes X,O 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-43 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPYC'l lx1020 1.3x1020 2xl021 l x l0 22 2 2 2 2 n/cm n/cm n/cm n/cm Assembly Subassembly Component Material Applicable ~q,< $q>< ~ cp < ~ <p <

1.3x10 20 6.7xl020 lx10 22 1.3x l0 22 2

n/cm2 n/cm n/cm 2 n/cm 2 Control Rod Upper Guide Tube Water flow slot Internals Assemblies and ligaments 304 ss Yes x,o x,o x,o 0 Assembly Flow Downcomers Mixing Devices Mixing devices 304 ss No Mixin devices CF8 Yes x,o x,o x,o x,o X,O Upper Core Fuel Plate and Fuel alignment pins 316 ss No Alignment Pin Fuel 304 ss Yes x,o x,o x,o x,o 304 ss Yes 0 0 x,o x,o x,o 0 Protective Skirt 304 ss No Protective skirt 316 ss No bolts Protective skirt 304 ss No lock bars Protective skirt 304 ss No dowel ins Protective skirt dowel ins 316 ss No Upper lnstrumentati on Conduit and Bolting 316 ss Yes x,o Supports WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-44 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY('l lxl020 l.3x1020 2xl021 l x l022 2 2 n/cm n/cm" n/cm2 n/cm Assembly Subassembly Component Material Applicable  :$.q> < $cp< $ cp < $ <p <

22 1.3x1020 6.7xlOW l x10 22 1.3xl0 2

n/cm2 n/cm n/cm2 n/cm2 Upper Upper Instrumentation Internals Conduit and Bolting 304 ss Yes x,o Assembly Supports Brackets, clamps, terminal blocks, 304 ss Yes x,o X,O x,o 0 and conduit stra s Brackets, clamps, terminal blocks, 302 ss No and conduit stra s Brackets, clamps, terminal blocks, CF8 Yes X,O x,o x,o 0 and conduit stra s Conduit seal assembly - body, 304 ss Yes x,o tubesheets Conduit seal assembly - tubes 304 ss Yes x,o Conduits 304 ss Yes x,o X,O X,O Flan e base 304 ss Yes x,o 304 ss No 304L SS Yes X,O 304 ss Yes X,O UHi flow column Upper Plenum CF8 No bases UHI flow columns 304 ss No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-45 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1J lx10 20 l.3x10 20 2x1021 lx10 22 n/cm2 n/cm 2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable S q, <  :$<p< Sep < S ep<

1.3x1020 6.7xl020 lx10 22 1.3x l0 22 n/cm2 n/cm2 n/cm 2 n/cm2 Upper Upper Support Internals Column Adapters 304 ss Yes X,O Assembly Assemblies Bolts 316 ss Yes X,O X,O X,O X,O Column bases 304 ss No Column bases CFS Yes x,o 0 0 Column bodies 304 ss Yes x,o x,o x,o Extension tubes 304 ss Yes x,o Flan es 304 ss Yes x,o Lock ke s 304 ss Yes x,o 0 0 304L SS No Nuts 304 ss Yes X,O Nuts 302 ss Yes X,O Upper Support Plate Assembly Bolts 316 ss Yes x,o Dee beam ribs 304 ss Yes x,o Deep beam stiffeners 304 ss Yes x,o Flan e 304 ss No Flan e CFS No Inverted top hat ITH flan e 304 ss No Inverted top hat (ITH) upper 304 ss No SU ort late Lock ke s 316 ss No Lock ke s 304 ss Yes X,O WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-46 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 Efpy<1>

lx1020 l.3xl010 2x1021 lxl 022 n/cm 2 n/cm 2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable  ::5q,< ~q><  ::5 <p <  ::5 cp <

1.3xl020 6.7x1020 lx1022 1.3x1022 2

n/cm2 n/cm2 n/cm 2 n/cm Upper Upper Support Internals Plate Assembly Ribs 304 ss Yes x,o Assembly Upper SU ort late 304 ss Yes x,o Upper CF8 No SU Ort late Upper support rin or skirt 304 ss Yes x,o Upper support CF8 Yes rin or skirt Lower Baffle and Baffle bolting Internals Former lock devices 304 ss Yes X X x,o x,o x,o x,o X,O Assembly Assembly Baffle-ed e bolts 316 ss Yes 0 x,o X,O x,o x,o Baffle-ed e bolts 347 ss No Baffle lates 304 ss Yes 0 0 0 x,o x,o x,o X,O Baffle-former bolts 316 ss Yes 0 x,o X,O x,o x,o Baffle-former bolts 347 ss No Barrel-former bolts 316 ss Yes x,o x,o x,o x,o 0 0 Barrel-former bolts 347 ss No Former )ates 304 ss Yes 0 0 x,o x,o x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-47 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit I at 72 EFPY 0 >

Ix1020 1.3xl020 2x1021 lxl022 n/cm2 n/cm 2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable $<p< $cp< $cp< $cp<

l.3x1020 6.7xl020 lx10 22 l.3xl0 22 n/cm2 n/cm 2 n/cm2 n/cm2 Bottom Lower Mounted BMI column Internals Instrumentation bodies 304 ss Yes x,o Assembly (BMI) Column Assemblies BMI column bolts 316 ss Yes x,o 0 0 0 BMI column collars 304 ss Yes x,o x,o X,O BMI column 304 ss No cruciforms BMI column cruciforms CFS Yes x,o 0 0 0 BMI column extension bars 304 ss Yes x,o x,o x,o x,o x, o x,o x,o x,o BMI column extension tubes 304 ss Yes x,o BMI column lock ca s 304L SS Yes x,o 0 0 0 BMI column nuts 304 ss Yes x,o x,o x,o Core Barrel Core barrel flange 304 ss Yes x,o Core barrel outlet nozzles 304 ss Yes x,o Upper core barrel (includes UFW, 304 ss Yes x,o x,o 0 UGW,andUAW WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-48 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY<1l lx1020 1.3x1020 2xl021 lxl0 22 n/cm2 2

n/cm2 n/cm2 n/cm Assembly Subassembly Component Material Applicable  :::: q> < ~cp< $ q> < $ q> <

l.3x1<>2° 6.7x1<>2° lxl022 l.3x10 22 n/cm2 2

n/cm2 n/cm2 n/cm Lower core barrel Lower (includes LGW, Internals Core Barrel LFW, MAW, and 304 ss Yes X,O x,o x,o x,o x,o x,o 0 0 Assembly LAW Diffuser Plate Diffuser Plate 304 ss No Flux Thimbles Flux thimble 304 ss No (Tubes) tube lu s Flux thimble tube lu s 308 ss Yes x, o Flux thimble 316 ss No tube lu s Flux thimble A600 No tube lu s Flux thimbles (tubes) 316 ss Yes x,o x,o x,o x,o x,o x,o x,o x,o x,o Flux thimbles A600 No (tubes)

Head Cooling Head cooling S ra Nozzles s ra nozzles 304 ss Yes x,o Irradiation Irradiation Specimen specimen guide 304 ss Yes x,o x,o x,o Guides Irradiation specimen guide 316 ss No bolts WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-49 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1>

lx.1020 1.3xto20 2x10 21 lxl0 22 2

n/cm 2

n/cm n/cm2 n/cm 2

Assembly Subassembly Component Material Applicable :sq> < :c:; q,<  :::; q> <  :::; q> <

l.3xl021> 6.7xl~ lxl022 l.3x10 22 n/cm2 n/cm2 n/cm2 n/cm2 Lower Irradiation Irradiation Internals Specimen specimen lock 304L SS No Assembly Guides 304 ss Yes X,O Lower Core Fuel alignment Plate and Fuel pins 304 ss Yes x,o X,O x,o 0 Ali nment Pins Fuel alignment ins 316 ss No Lower Core LCP - fuel Plate and Fuel alignment pin 316 ss No Alignment Pins bolts LCP-fuel alignment pin 304L SS No lock ca s Lower core late 304 ss Yes 0 0 X,O x,o x,o x,o XL lower core 304 ss No late Lower Support Lower support Column column bodies CFS Yes x,o X,O X,O X,O x,o x,o 0 0 Assemblies Lower support 304 ss No column bodies Lower support 304 ss No column bolts Lower support column bolts 316 ss Yes x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-50 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY('l lx1020 1.3xl020 2xl021 lxl022 2 n/cm.2 2 2 n/cm n/cm n/cm Assembly Subassembly Component Material Applicable 5 q, < ~q, < $ q> < :Sep<

1.3xl020 6.7xl020 lxl0 22 l.3xl0 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Lower Lower Support Lower support Internals Column column nuts 304 ss Yes X 0 0 0 Assembly Assemblies Lower support column sleeves 304 ss Yes x,o 0 Lower Support Lower support Casting or CFS No casting Forging Lower SU 304 ss Yes x,o Neutron Panels Neutron panel ffhermal bolts 316 ss No Shield Neutron panel lock ca s 304 ss No Neutron panel 304L SS No lock ca s Thermal shield bolts 316 ss Yes x,o x,o x,o Thermal shield dowels 316 ss Yes x,o x,o x,o Thermal shield dowels 304 ss Yes x,o x,o x,o Thermal shield flexures 304 ss No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-51 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY('l lxl<r° l.3xlc>2° 2xl021 lx10 22 n/cm 2

n/cm2 n/cni2 n/cm2 Assembly Subassembly Component Material Applicable $ q> < ~, <

l.3xl020 6.7x1<>2°

~q><

lx10 22

~ q> <

l.3xl0 22 n/cm2 n/cm 2 n/cm2 n/cm2 Lower Neutron Panels Thermal Internals /Thermal shield flexures 316 ss Yes x,o x,o x,o Assembly Shield Thermal shield or neutron anels 304 ss Yes X,O x,o x,o x,o x,o 0 Radial Radial support 304 ss No Support Keys ke bolts Radial support ke bolts 316 ss Yes x,o Radial support ke lock ke s 304 ss Yes x,o Radial SU ort ke s 304 ss Yes x,o Secondary Core Support (SCS)

SCS base plate 304 ss Yes x,o Assembly SCS bolts 316 ss Yes X,O SCS energy absorber 304 ss Yes x,o scs t 304 ss Yes X,O scs t CFS No 304 ss Yes x,o CFS No 304 ss Yes X,O Upper and lower tie )ates 304 ss Yes X,O WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-52 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 Efpy<'l lxl020 1.3xl<>2° 2xl021 lxl022 n/cm2 n/cm.2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable ~cp< ~cp< Sep < Sep <

l.3xlcr° 6.7xl<Y° lxl0 22 l.3x10 22 n/cm2 n/cm2 n/cm 2 n/cm2 Interfacing Interfacing Components Components Clevis insert bolts AX-750 Yes x,o Clevis insert lock ke s A600 Yes x,o Clevis insert lock ke s 316 ss No Clevis inserts A600 Yes x,o Clevis inserts 304 ss No Clevis inserts Stellite Yes x,o Clevis insert dowels(2l A600 Yes x,o Clevis bearing Stellite wear Stellite Yes x,o surface<2l Head and vessel alignment pin 316 ss Yes x,o bolts Head and vessel alignment pin 304L SS Yes x,o lock cu s Head and vessel 304 ss Yes x,o 304 ss Yes x,o Internals hold-down s rin 403 ss No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-53 Table 2.6-2 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 1 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 1 lx1020 1.3xl020 2xl021 lxl0 22 n/cm 2

n/cm 2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable S ep < $cp< :Sep< :Sq><

1.3x1<>2° 6.7xl<>2° lx10 22 l.3xl022 n/cm 2

n/cm 2

n/cm2 n/cm2 Interfacing Interfacing Upper core plate ali . 304 SS Yes x,o x,o x,o 0 Components Components The 304 SS Yes X, O Notes:

(1) Components with multiple X's indicate components that span more than one fluence range, where all applicable fluence ranges are noted.

(2) The clevis insert dowels and clevis bearing Stellite wear surface have been added as seen within Table 5-14 of Reference 18. Both of these components are located with the clevis insert, between the lower core support and vessel. These components fall into the lowest fluence range based on location.

(3) The thermal sleeves have been added as seen within Table 5-14 of Reference 18. This component is located above the upper internals and falls into the lowest fluence range based on location.

WCAP-1 8353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-54 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 l lxl02& 1.3xl<Y0 2xl021 lxl022 n/cm2 n/cm2 n/cm2 n/cm 2 Assembly Subassembly Component Material Applicable Sep< Sep< S ep < :s q> <

1.3x1<>2° 6.7xtoJG lxl0 22 l.3xl022 n/cm2 n/cm2 n/cm2 n/cm 2 Control Rod Upper Guide Tube Anti-rotation Internals Assemblies and studs and nuts 304 ss Yes x,o Assembly Flow Downcomers Anti-rotation studs and nuts 316 ss No Bolts 316 ss Yes x,o Bolts 304 ss No C-tubes 304 ss Yes x,o X,O X,O 0 Enclosure ins 304 ss Yes X,O Upper guide tube enclosures 304 ss Yes x,o x,o x,o 0 Upper guide tube CFS No enclosures Flanges-intermediate 304 ss Yes x,o Flanges-CFS No intermediate Flan es - lower 304 ss Yes X,O 0 0 Flan es - lower CFS No Flexureless inserts 304SS No Flexures AX-750 No Guide lates/cards 304 ss Yes x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-55 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY<1>

lxl020 1.3xlif0 2x1021 lxl022 n/cm 2 n/cm2 n/cm 2 n/cm 2

Assembly Subassembly Component Material Applicable ~cp < :fcp< ~q> < ~ q> <

1.3x1020 6.7x1<>2° lx10 22 l.3x1022 n/cm2 n/cm2 n/cm2 n/cm 2 Control Rod Upper Guide Tube Internals Assemblies and Guide plates/cards 316L SS No Assembly Flow Downcomers Guide !ates/cards CFS No Guide tube AX-750 No ins 316 ss Yes X x,o x,o x,o

!ates 304 ss Yes x,o Housin CFS No Inserts 304 ss No Lock bars 304 ss Yes X,O Sheaths 304 ss Yes x,o x,o x,o 0 Support pin cover late 316 ss No Support pin cover late ca screws 316 ss No Support pin cover plate locking caps 304 ss No and tie stra s Su AX-750 No 316 ss Yes X X,O 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-56 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY(IJ lxl020 1.3x1<>2° 2x10 21 lx1022 2 2 n/cm2 n/cm 2

n/cm n/cm Assembly Subassembly Component Material Applicable $cp< $cp< $ <p < =5 <p <

1.3xtG2° 6.7x10 20 lxl022 l.3x10 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Control Rod Upper Guide Tube Water flow slot Internals Assemblies and ligaments 304 ss Yes x,o x,o x,o 0 Assembly Flow Downcomers Mixing Devices Mixin devices 304 ss No Mixin devices CFS Yes X,O x,o x,o X,O x,o Upper Core Fuel Plate and Fuel alignment pins 316 ss No Alignment Pin Fuel ns 304 ss Yes x,o x,o x,o x,o u late 304 ss Yes 0 0 x,o x,o x,o 0 Protective Skirt 304 ss No Protective skirt 316 ss No bolts Protective skirt lock bars 304 ss No Protective skirt dowel ins 304 ss No Protective skirt dowel ins 316 ss No Upper Instrumentation Conduit and Bolting 316 ss Yes x,o Supports Boltin 304 ss Yes X,O WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-57 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY<' l 1x1020 1.3xl020 2x10 21 lxl0 22 2 2 2 2 n/cm n/cm n/cm n/cm Assembly Subassembly Component Material Applicable $ <p < $lp< ~ cp < ~ cp <

L3x1020 6.7x1020 lxl022 l.3xl022 2

n/cm2 2 2 n/cm n/cm n/cm Upper Upper Brackets, clamps, Instrumentation Internals Conduit and terminal blocks, 304 ss Yes x,o x,o x,o 0 Assembly and conduit straps Supports Brackets, clamps, terminal blocks, 302 ss No and conduit stra s Brackets, clamps, terminal blocks, CFS Yes x,o x,o x,o 0 and conduit stra s Conduit seal assembly - body, 304 ss Yes x,o tubesheets Conduit seal assembl -tubes 304 ss Yes x,o 304 ss Yes x,o X,O X,O 304 ss Yes X,O 304 ss No 304L SS Yes X,O 304 ss Yes X,O UHi flow column Upper Plenum CFS No bases UHi flow columns 304 ss No Upper Support Column Adapters 304 ss Yes x,o Assemblies Bolts 316 ss Yes x,o x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-58 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY<1l txl020 l.3xl020 2xl021 lxl0 22 2 2 2 n/cm n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable $q><  !:: q, < :S <p < :s (j) <

1.3x1020 6.7xl<r° lx10 22 l.3x10 22 n/cm2 n/cm.2 n/cm2 n/cm2 Upper Upper Support Internals Column Column bases 304 ss No Assembly Assemblies Column bases CFS Yes X X,O 0 0 Column bodies 304 ss Yes X,O x,o x,o Extension tubes 304 ss Yes x,o 304 ss Yes x,o 304 ss Yes X, O 0 0 304L SS No Nuts 304 ss Yes x,o Nuts 302 ss Yes x,o Upper Support Plate Assembly Bolts 316 ss Yes x,o Dee beam ribs 304 ss Yes x,o Deep beam 304 ss Yes X,O stiffeners 304 ss No CFS No Inverted top hat (ITH) flan e 304 ss No Inverted top hat (ITH) upper 304 ss No su ort late 316 ss No 304 ss Yes X,O Ribs 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/ 19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-59 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1>

lx1020 1.3xl020 2xl021 lxl0 22 2

n/cm 2 n/cm2 n/cm n/cm2 Assembly Subassembly Component Material Applicable Sq,< $q,< S q> < S q> <

1.3xl020 6.7x1020 lxl022 l.3x10 22 2

n/cm2 n/cm2 n/cm n/cm 2 Upper Upper Support Upper Internals Plate Assembly support plate 304 ss Yes x,o Assembly Upper CFS No SU Ort late Upper support rin or skirt 304 ss Yes x,o Upper support CFS No rin or skirt Lower Baffle and Baffle bolting Internals Former lock devices 304 ss Yes X X x,o x,o x,o x,o x,o Assembly Assembly Baflle-ed e bolts 316 ss Yes 0 x,o x,o X,O x,o Baftle-ed e bolts 347 ss No Baffle )ates 304 ss Yes 0 0 x,o X,O X,O X,O X,O Baffle-former bolts 316 ss Yes 0 x,o x,o X,O x,o Baffle-former bolts 347 ss No Barrel-former bolts 316 ss Yes x,o x,o x,o x,o 0 0 Barrel-former bolts 347 ss No Former Iates 304 ss Yes 0 X,O x,o X,O x,o X,O x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-60 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EfpyOl lx1026 l.3xl<Y° 2xl021 lxl0 22 n/cm 2 n/cm 2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable S q> < :S q, <  ::s cp <  ::s cp <

1.3xl020 6.7x1<>2° lx10 22 l.3x10 22 2

n/cm2 n/cm2 n/cm n/cm2 Bottom Lower Mounted BMI column Internals Instrumentation bodies 304 ss Yes x,o Assembly (BMI) Column Assemblies BMI column bolts 316 ss Yes X,O 0 0 0 BMI column collars 304 ss Yes X,O x,o 0 BMI column cruciforms 304 ss No BMI column cruciforms CFS Yes x,o 0 0 0 BMI column extension bars 304 ss Yes x,o x, o X,O X,O x,o x,o x,o x,o BMI column extension tubes 304 ss Yes x,o BMI column 304L SS Yes X,O 0 0 0 lock ca s BMI column nuts 304 ss Yes x,o x,o x,o Core Barrel Core barrel flan e 304 ss Yes X,O Core barrel outlet nozzles 304 ss Yes x,o Upper core barrel (includes UFW, 304 ss Yes X,O x,o 0 UGW, and UAW)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-61 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY<1>

lxl020 1.3xt<>2° 2x10 21 l x l022 n/cm2 n/cm2 n/cm 2

n/cm 2

Assembly Subassembly Component Material Applicable $q>< :Sq,< :S q> < :S q> <

1.3xl020 6.7x1020 lx10 22 1.3x1 0 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Lower core barrel Lower (includes LGW, Internals Core Barrel LFW, MAW, and 304 ss Yes x,o x,o x,o x,o x,o x,o 0 0 Assembly LAW Diffuser Plate Diffuser Plate 304 ss No Flux Thimbles Flux thimble 304 ss No (Tubes) tube lu s Flux thimble tube lu s 308 ss Yes x,o Flux thimble 316 ss No tube lu s Flux thimble A600 No tube lu s Flux thimbles (tubes) 316 ss Yes x,o x,o x,o x,o x,o x,o x,o x,o x,o Flux thimbles A600 No (tubes)

Head Cooling Head cooling S ra Nozzles s ra nozzles 304 ss Yes x,o Irradiation Irradiation Specimen specimen guide 304 ss Yes x,o x,o x,o Guides Irradiation specimen guide 316 ss No bolts WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-62 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1>

txt<>2° 1.3xt<>2° 2x10 21 lx I 022 n/crn2 n/cm2 n/cm 2

n/cm 2

Assembly Subassembly Component Material Applicable Sep< Sep< S ep< :sq> <

1.3x1020 6.7x1020 lx10 22

  • 1.3x1022 n/cm2 n/cm2 n/cm2 n/cm2 Lower Irradiation Irradiation Internals Specimen specimen lock 304L SS No Assembly Guides 304 ss Yes x,o Lower Core Fuel alignment Plate and Fuel pins 304 ss Yes x,o X,O X,O 0 Alignment Pins Fuel alignment ins 316 ss No LCP-fuel alignment pin 316 ss No bolts LCP-fuel alignment pin 304L SS No lock ca s Lower core late 304 ss Yes 0 0 X,O x,o x,o 0 XL lower core 304 ss No late Lower Support Lower support Column column bodies CFS Yes x,o x,o x,o x,o x,o x,o 0 0 Assemblies Lower support column bodies 304 ss No Lower support col umn bolts 304 ss No WCAP-18353-NP October 2018 Revision 0
      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-63 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 Efpy< 1>

lxl020 l.3xt<>2° 2xl021 lxl022 n/cm2 n/cm2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable :Sep < :S <p < :s cp < :s cp <

l.3xl020 6.7x1<>2° lxl0 22 l.3xl022 n/cm2 n/cm2 n/cm2 n/cm2 Lower Lower Support Lower support Internals Column column bolts 316 ss Yes x,o x,o x,o Assembly Assemblies Lower support column nuts 304 ss Yes X 0 0 0 Lower support column sleeves 304 ss Yes X,O 0 Lower Support Lower support Casting or CFS No casting Forging Lower SU 304 ss Yes x,o Neutron Panels Neutron panel

/Thermal Shield bolts 316 ss No Neutron panel lock ca s 304 ss No Neutron panel 304L SS No lock ca s Thermal shield bolts 316 ss Yes x,o x,o x,o Thermal shield dowels 316 ss Yes x,o x,o x,o Thermal shield dowels 304 ss Yes x,o x,o x,o Thermal shield flexures 304 ss No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-64 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY(' )

lx1020 1.3xlo2° 2xl0 21 lxl0 22 2

n/cm n/cm 2 n/cm 2 n/cm 2 Assembly Subassembly Component Material Applicable $q>< ~cp< Sep< Sep<

1.3x102.0 6.7xl<r° lxl0 22 l.3x10 22 n/cm2 n/cm2 n/cm 2 n/cm 2 Lower Neutron Panels Thermal Internals ffhermal Shield shield flexures 316 ss Yes x,o x,o x,o Assembly Thermal shield or neutron anels 304 ss Yes x,o x,o X,O x,o 0 0 Radial Radial support Support Keys ke bolts 304 ss No Radial support ke bolts 316 ss Yes x,o Radial support ke lock ke s 304 ss Yes X,O Radial su ort ke s 304 ss Yes x,o Secondary Core Support (SCS) SCS base plate 304 ss Yes x,o Assembly SCS bolts 316 ss Yes x,o SCS energy absorber 304 ss Yes x,o 304 ss Yes X,O CF8 No 304 ss Yes X,O CF8 No 304 ss Yes x,o Upper and lower tie !ates 304 ss Yes x,o WCAP-18353 -NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-65 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EfpyOl lxl020 1.3x1020 2x1021 lxl022 n/cni2 n/cm 2

n/cm2 n/cm2 Assembly Subassembly Component Material Applicable :sq>< :Sep< :S ep < :S ep<

1.3x1020 6.7x1020 l xl0 22 1.3x1022 n/crn.2 n/cmz n/cm2 n/cm2 Interfacing Interfacing Components Components Clevis insert bolts AX-750 Yes x,o Clevis insert lock ke s A600 Yes x,o Clevis insert lock ke s 316 ss No Clevis inserts A600 Yes x,o Clevis inserts 304 ss No Clevis inserts Stellite Yes X, O Clevis insert dowe1s<2l A600 Yes X,O Clevis bearing Stellite wear Stellite Yes x,o surface<2l Head and vessel alignment pin 316 ss Yes x,o bolts Head and vessel alignment pin 316 ss Yes x,o bolts Head and vessel alignment pin 304L SS Yes x,o lock cu s Head and vessel 304 ss Yes x,o hold-down s rin 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-66 Table 2.6-3 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 52.8 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 >

lx1020 l.3x1<>2° 2xl0 21 l x1022 2 2 n/cm n/cm n/cm 2 n/cm 2 Assembly Subassembly Component Material Applicable :S ep < :s <p < :S ep< :s <p <

l.3x1020 6.7xl020 lxl 022 l.3xl022 n/cm2 n/cm2 n/cm 2 n/cm2 Interfacing Interfacing Internals Components Components hold-down s r*

403 ss No Up ali 304 ss Yes x,o x,o x,o 0 The 304 ss Yes x,o Notes:

(1) Components with multiple X's and O's indicate components that span more than one fluence range, where all applicable fluence ranges are noted.

(2) The clevis insert dowels and clevis bearing Stellite wear surface have been added as seen within Table 5-14 of Reference 18. Both of these components are located with the clevis insert, between the lower core support and vessel. These components fall into the lowest fluence range based on location.

(3) The thermal sleeves have been added as seen within Table 5-14 of Reference 18. This component is located above the upper internals and falls into the lowest fluence range based on location.

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-67 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 Efpy< 1l lxl 020 1.3xl020 2xl021 lxl022 2 2 2 n/cm n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable  ::S ep<  ::S ep<  ::S ep < ~ ep <

l.Jxl020 6.7xt<>29 lx l022 1.3x1022 n/cm 2 n/cm2 n/cm2 n/cm 2 Control Rod Upper Guide Tube Anti-rotation Internals Assemblies and studs and nuts 304 ss Yes x,o Assembly Flow Down comers Anti-rotation studs and nuts 316 ss No Bolts 316 ss Yes x,o Bolts 304 ss No C-tubes 304 ss Yes x,o X,O x,o 0 Enclosure ins 304 ss Yes X,O Upper guide tube enclosures 304 ss Yes x,o x,o x,o 0 Upper guide tube CFS No enclosures Flanges-intermediate 304 ss Yes x,o Flanges-CFS No intermediate Flan es - lower 304 ss Yes X,O 0 0 Flan es - lower CFS No Flexureless 304SS No inserts Flexures AX-750 No Guide Iates/cards 304 ss Yes x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-68 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1>

lxl020 1.3xl020 2x1021 lx1022 2

n/cm2 n/cm n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable  :$cp<  :$ cp <  :$ cp <  :$ cp <

l.3x1020 6.7xta2° lx1022 1.3x1022 n/cm 2 n/crn2 n/cm 2 n/cm 2 Control Rod Upper Guide Tube Guide Internals Assemblies and 316L SS No plates/cards Assembly Flow Downcomers Guide CFS No Iates/cards Guide tube AX-750 No ins 316 ss Yes x,o x,o x,o lates 304 ss Yes x,o CFS No Inserts 304 ss No Lock bars 304 ss Yes x,o Sheaths 304 ss Yes x,o x,o x,o 0 Support pin cover late 316 ss No Support pin cover plate cap 316 ss No screws Support pin cover plate locking caps and 304 ss No tie stra s Su ort AX-750 No 316 ss Yes x,o 0 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-69 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY0 >

lx1020 1.3xI<>2° 2x10 21 lxl 022 n/cm 2 n/cm2 n/cm 2 n/cm2 Assembly Subassembly Component Material Applicable :S q, < $ q>< $<p< :S <p <

1.3xl020 6.7xl020 lxl0 22 l.3xl0 22 n/cm 2 n/cm2 n/cm 2 n/cm2 Control Rod Upper Guide Tube Water flow slot Internals Assemblies and ligaments 304 ss Yes x,o x,o x,o 0 Assembly Flow Downcomers Mixing Devices Mixin devices 304 ss No Mixin devices CF8 Yes x,o x,o X,O x,o x,o Upper Core Plate Fuel and Fuel alignment pins 316 ss No Alignment Pin Fuel 304 ss Yes x,o x,o x,o x,o 304 ss Yes 0 0 x,o x,o x,o 0 Protective Skirt 304 ss No Protective skirt 316 ss No bolts Protective skirt lock bars 304 ss No Protective skirt dowel ins 304 ss No Protective skirt dowel ins 316 ss No Upper Instrumentation Conduit and Bolting 316 ss Yes x,o Supports Boltin 304 ss Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-70 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit I at 72 EfpyOl lx1020 l.3x1020 2xl021 lx1O22 n/cm 2 n/cm2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable  :::Sq,<  :$q,< $ cp <  :::S ep <

1.3xl020 6.7x1020 lxl022 l.3xlO22 n/cm2 n/cm2 n/cm2 n/cm 2 Upper Brackets, clamps, Upper Instrumentation terminal blocks, Internals Conduit and and conduit 304 ss Yes x,o x,o x,o 0 Assembly Supports stra s Brackets, clamps, terminal blocks, and conduit 302 ss No stra s Brackets, clamps, terminal blocks, and conduit CFS Yes x,o x,o x,o 0 stra s Conduit seal assembly - body, 304 ss Yes x,o tubesheets Conduit seal assembl - tubes 304 ss Yes x,o Conduits 304 ss Yes x,o x,o x,o 304 ss Yes X,O 304 ss No Lo s 3O4L SS Yes x,o Su s 304 ss Yes x,o UHi flow column Upper Plenum CFS No bases UHi flow columns 304 ss No WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-71 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1>

lx1O20 1.3x1020 2xlO21 lx1 O22 n/cm 2 n/cm2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable S q, < S <p< S q, < Sep<

1.3x1020 6.7x1020 lxl022 l.3x1022 n/cm 2 n/cm2 n/cm2 n/cm 2 Upper Upper Support Internals Column Adapters 304 ss Yes x,o Assembly Assemblies Bolts 316 ss Yes x,o x,o x,o x,o Column bases 304 ss No Column bases CFS Yes x,o 0 0 Column bodies 304 ss Yes X,O X,O X,O Extension tubes 304 ss Yes x,o 304 ss Yes X,O 304 ss Yes x,o 0 0 3O4L SS No Nuts 304 ss Yes x,o Nuts 302 ss Yes x,o Upper Support Plate Assembly Bolts 316 ss Yes x,o Dee beam ribs 304 ss Yes x,o Deep beam stiffeners 304 ss Yes x,o Flan e 304 ss No Flan e CFS No Inverted top hat 304 ss No ITH flan e Inverted top hat (ITH) upper 304 ss No SU ort late Lock ke s 316 ss No 304 ss Yes X,O WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-72 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 l lxl020 1.3x10 20 2xl021 lx1022 2 n/cm2 n/cm2 n/cm 2 n/cm Assembly Subassembly Component Material Applicable :Sq>< :Sq,< :Sq><  :::: q> <

20 lx1022 22 1.3xlO 6.7xto2<> 1.3xl0 2 n/cm2 2 n/cm n/cm2 n/cm Upper Upper Support Internals Plate Assembly Ribs 304 ss Yes x,o Assembly Upper SU ort late 304 ss Yes x,o Upper CF8 No SU ort late Upper support rin or skirt 304 ss Yes x,o Upper support CF8 No rin or skirt Lower Baffle and Baffle bolting Internals Former lock devices 304 ss Yes X X x,o x,o x,o x,o x,o Assembly Assembly Baffle-ed e bolts 316 ss Yes 0 x,o x,o x,o x,o Baffle-ed e bolts 347 ss No Baffle lates 304 ss Yes 0 0 x,o x,o x,o x,o x,o Baffle-former bolts 316 ss Yes 0 x,o x,o x,o x,o Baffle-former bolts 347 ss No Barrel-former bolts 316 ss Yes x,o x,o x,o x,o 0 0 Barrel-former 347 ss No bolts Former lates 304 ss Yes 0 0 x,o x,o x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-73 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 >

lxl020 l.3xl020 2x10 21 lxl 022 2 2 2 2 n/cm n/cm n/cm n/cm Assembly Subassembly Component Material Applicable Sq>< :Sep< sq>< Sep<

1.3x1020 6.7x1020 lxl022 1.3x1022 n/cm 2 n/cm2 n/cm 2 n/cm 2 Bottom Mounted Lower Instrumentation BMI column Internals (BMI) Column bodies 304 ss Yes x,o Assembly Assemblies BMI column bolts 316 ss Yes x,o 0 0 0 BMI column collars 304 ss Yes x,o x,o x,o BMI column cruciforms 304 ss No BMI column cruciforms CF8 Yes x,o 0 0 0 BMI column extension bars 304 ss Yes x,o x,o x,o x,o x,o x,o x,o x,o BMI column extension tubes 304 ss Yes x,o BMI column lock ca s 304L SS Yes x,o 0 0 0 BMI column nuts 304 ss Yes x,o x,o X,O Core barrel Core Barrel flan e 304 ss Yes x,o Core barrel outlet nozzles 304 ss Yes x,o Upper core barrel (includes UFW, UGW,and 304 ss Yes x,o x,o 0 UAW)

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-74 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 >

20 20 2xl021 lx1022 lx10 l.3xl0 2 2 n/cm2 n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable :Sq,< Sep< :Sq,< :s <p <

1.3xl020 6.7xla2° lx10 22 1.3xl022 n/cm2 n/cm2 n/cm2 n/cm2 Lower core Lower barrel (includes Internals Core Barrel LGW,LFW, 304 ss Yes x,o x,o x,o x,o x,o x,o 0 0 Assembly MAW,andLAW Diffuser Plate Diffuser Plate 304 ss No Flux Thimbles Flux thimble 304 ss No (Tubes) tube Ju s Flux thimble tube Ju s 308 ss Yes X,O Flux thimble tube Ju s 316 ss No Flux thimble A600 No tube Ju s Flux thimbles (tubes) 316 ss Yes x,o x,o x,o x,o x,o x,o x,o x,o x,o Flux thimbles A600 No (tubes)

Head Cooling Head cooling S ra Nozzles s ra nozzles 304 ss Yes x,o Irradiation Irradiation Specimen Guides 304 ss Yes x,o x,o x,o specimen guide 316 ss No bolts Irradiation specimen lock 304L SS No ca s WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-75 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY< 1l lxl020 l.3xto-2° 2xl021 lxl022 2 2 2 n/cm n/cm n/cm2 n/cm Assembly Subassembly Component Material Applicable :5<p< :5q>< :5 <p < :5 <p <

l.3x1020 6.7xlo-2° 1xl 022 1.3x1022 n/cm2 n/cm2 n/cm 2 n/cm 2 Lower Irradiation Internals Specimen Guides Specimen plugs 304 ss Yes x,o Assembly Lower Core Plate Fuel alignment and Fuel pins 304 ss Yes x,o x,o x,o 0 Alignment Pins Fuel alignment ins 316 ss No LCP-fuel alignment pin 316 ss No bolts LCP-fuel alignment pin 304L SS No lock ca s Lower core late 304 ss Yes 0 0 x,o x,o x,o x,o XL lower core 304 ss No late Lower Support Lower support Column column bodies CFS Yes x,o x,o x,o x,o :x,o x,o 0 0 Assemblies Lower support column bodies 304 ss No Lower support 304 ss No column bolts Lower support column bolts 316 ss Yes x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-76 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY 0 >

lxl020 1.3x1020 2xl021 lx10 22 n/cm2 n/cm2 n/cm2 n/cm2 Assembly Subassembly Component Material Applicable ~cp<  :$ q> < ~cp< ~cp<

1.3x1020 6.7x10 20 lx10 22 1.3x1022 n/cm2 n/cm2 n/cm2 n/cm2 Lower Lower Support Lower support Internals Column column nuts 304 ss Yes X 0 0 0 Assembly Assemblies Lower support column sleeves 304 ss Yes x,o 0 Lower Support Lower support Casting or CFS No casting Forging Lower SU 304 ss Yes x,o Neutron Panels Neutron panel ffhermal Shield bolts 316 ss No Neutron panel 304 ss No lock ca s Neutron panel 304L SS No lock ca s Thermal shield bolts 316 ss Yes x,o x,o x,o Thermal shield dowels 316 ss Yes x,o x,o x,o Thermal shield dowels 304 ss Yes x,o x,o x,o Thermal 304 ss No shield flexures Thermal shield flexures 316 ss Yes x,o x,o x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-77 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 Efpy< 1l lxlO20 l.3xlO20 2x1021 lxl0 22 2

n/cm2 n/cm 2 n/cm n/cm2 Assembly Subassembly Component Material Applicable Sep< $cp< :5cp< :5cp<

l.3xl020 6.7xl02° lxl022 l.3xlO22 n/cm 2 n/cm2 n/cm2 n/cm 2 Lower Neutron Panels Thermal shield or Internals ffhermal Shield neutron panels 304 ss Yes x,o x,o x,o x,o x,o 0 Assembly Radial Radial support Support Keys ke bolts 304 ss No Radial support ke *bolts 316 ss Yes x,o Radial support ke lock ke s 304 ss Yes x,o Radial 304 ss Yes x,o Secondary Core Support (SCS) SCS base plate 304 ss Yes x,o Assembly SCS bolts 316 ss Yes x,o SCS energy absorber 304 ss Yes x,o scs t 304 ss Yes X,O CFS No 304 ss Yes x,o CFS No 304 ss Yes X,O Upper and lower tie !ates 304 ss Yes x,o Interfacing Interfacing Clevis insert Com onents Com onents bolts AX-75O Yes x,o WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse on-Proprietary Class 3 2-78 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY(' l lxlO 20 l.3xl0 20 2xl 0 21 lxl O22 2 2 n/cm n/cm 2 n/cm 2 n/cm Assembly Subassembly Component Material Applicable $cp< $q,< $ cp < $cp<

1.3xl020 6.7xI<>2° lxl022 l.3x l022 n/cm2 n/cm2 n/cm 2 n/cm 2 Interfacing Interfacing Clevis insert Components Components lock ke s A6OO Yes x,o Clevis insert lock ke s 316 ss No Clevis inserts A6OO Yes x,o Clevis inserts 304 ss No Clevis inserts Stellite Yes x,o Clevis insert dowe1s<2>

A6OO Yes x,o Clevis bearing Stellite wear Stellite Yes x,o surface<2>

Head and vessel alignment pin 316 ss Yes x,o bolts Head and vessel alignment pin 3O4L SS Yes x,o lock cu s Head and vessel 304 ss Yes x,o 304 ss Yes x,o Internals 403 ss No Upper core plate ali nment ins 304 ss Yes x,o x,o x,o 0 WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 2-79 Table 2.6-4 MRP-227-A Plant Applicability Fluence Screening Results for the Selected Westinghouse 3-Loop Plant Unit 2 at 72 EFPY MRP-191 [6] Evaluated Fluence for Unit 1 at 72 EFPY(ll l xlO20 l.3xta2° 2xl O21 lxlO22 2 2 n/cm 2 n/cm2 n/cm n/cm Assembly Subassembly Component Material Applicable $ cp < $cp< ~ cp < ~ cp <

l.3xlO20 6.7x1020 lxl022 l.3x1022 n/cm2 n/cm2 n/cm2 n/cm2 Interfacing Interfacing Thermal 304 ss Yes Com onents Com onents sleeves<3>

Notes:

(I ) Components with multiple X's indicate components that span more than one fluence range, where all applicable fluence ranges are noted.

(2) The clevis insert dowels and clevis bearing Stellite wear surface have been added as seen within Table 5-14 of Reference 18. Both of these components are located with the clevis insert, between the lower core support and vessel. These components fall into the lowest fluence range based on location.

(3) The thermal sleeves have been added as seen within Table 5-14 of Reference 18. This component is located above the upper internals and falls into the lowest fluence range based on location.

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 3-1 3 REFERENCES

1. Regulatory Guide 1.190, "Calculational and Dosimetry Methods for Determining Pressure Vessel Neutron Fluence," Agencywide Documents Access and Management System (ADAMS) No.

ML010890301, U.S. Nuclear Regulatory Commission, March 2001.

2. Westinghouse Report for the Extended Beltline Pressure Vessel Fluence Evaluations Applicable to the Selected Westinghouse 3-loop Plant Units I & 2, September 2015.*
3. Materials Reliability Program: Framework and Strategies for Managing Aging Effects in Reactor Internals (MRP-134). EPRI, Palo Alto, CA: 2005. 1008203.
4. RSICC Computer Code Collection CCC-650, " DOORS3.2, One-, Two- and Three-Dimensional Discrete Ordinates Neutron/Photon Transport Code System," Available from the Radiation Safety Information Computational Center, Oak Ridge National Laboratory, April 1998.
5. RSICC Data Library Collection DLC-185, "BUGLE-96, Coupled 47 Neutron, 20 Gamma-Ray Group Cross Section Library Derived from ENDF/B-VI for LWR Shielding and Pressure Vessel Dosimetry Applications," Available from the Radiation Safety Information Computational Center, March 1996.
6. Materials Reliability Program: Screening, Categorization, and Ranking ofReactor Internals Components for Westinghouse and Combustion Engineering PWR Design (MRP-191, Revision 1). EPRI, Palo Alto, CA: 2016. 3002007960.
7. Westinghouse Report, WCAP-14040-A, Rev. 4, "Methodology Used to Develop Cold Overpressure Mitigating System Setpoints and RCS Heatup and Cooldown Limit Curves,"

ADAMS No. ML050120209, May 2004.

8. Materials Reliability Program: Pressurized Water Reactor Internals Inspection and Evaluation Guidelines (MRP-227-A). EPRI, Palo Alto, CA: 2011. 1022863.
9. Materials Reliability Program: Pressurized Water Reactor Internals Inspection and Evaluation Guidelines (MRP-227-Rev. 0). EPRI, Palo Alto, CA: 2008. 1016596.
10. Materials Reliability Program: PWR Internals Material Aging Degradation Mechanism Screening and Threshold Values (MRP-175). EPRI, Palo Alto, CA: 2005. 1012081.
11. Materials Reliability Program: Functionality Analysis for Westinghouse and Combustion Engineering Representative PWR Internals (MRP-230). EPRI, Palo Alto, CA: 2008. 1016597.
12. Materials Reliability Program: Aging Management Strategies for Westinghouse and Combustion Engineering PWR Internals (MRP-232). EPRI, Palo Alto, CA: 2008. 1016593.
13. Utility Calculation Note for the Derivation ofthe Selected Westinghouse 3-loop Plant Units 1&2 Inputs for MRP-227-A Fluence Assessment, May 20 14.*

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)

I 3-2 Westinghouse Non-Proprietary Class 3

14. EPRI Letter MRP 2013-025 Attachment 1, "MRP-227-AApplicability Guidelines for Combustion Engineering and Westinghouse Pressurized Water Reactor Designs," October 2013.
15. Materials Reliability Program Letter, MRP 2017-038, "Transmittal of Preliminary Results from MRP-191 Expert Panel Review in Support of Subsequent License Renewal at U.S. PWR Plants,"

December 15, 2017.

16. Westinghouse Report, WCAP-18205-NP, "Reactor Internals Fluence Evaluation for a Westinghouse 3-loop Plant with Twin Units - Subsequent License Renewal," December 2016.
17. Westinghouse Letter for the Drawing Tree Applicable to the Selected Westinghouse 3-loop Plant Units 1 and 2, February 2018.*
18. Westinghouse Letter, LTR-AMLR-18-4, Rev. 1, "Interim Guidance for the Pressurized Water Reactor Internals Inspection and Evaluation Guidelines, MRP-227, for Subsequent License Renewal - Westinghouse and Combustion Engineering-Designed Reactor Vessel Internals,"

July 9, 2018.

  • The plant-specific information in the references were removed per the customer's request, the corresponding references are attached electronically in Westinghouse Electronic Document Management System.

WCAP-18353-NP October 2018 Revision 0

      • This record was final approved on 10/19/2018 9:53:02 AM. (This statement was added by the PRIME system upon its validation)
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