ML18178A218

Enclosure 21 - APR1400-H-N-NR-14005-NP, Rev. 2, Summary Stress Report for Primary Piping

ML18178A218
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Site:	05200046
Issue date:	09/30/2016
From:	Korea Hydro & Nuclear Power Co, Ltd, Korea Electric Power Corp
To:	NRC/NRO/DNRL
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ML18178A202	List: ML18178A212 ML18178A213 ML18178A214 ML18178A215 ML18178A217 ML18178A218 ML18178A220 ML18178A221 ML18178A222 ML18178A223 ML18178A224
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MKD/NW-18-0091L APR1400-H-N-NR-14005-NP, Rev 2
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Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Summary Stress Report for Primary Piping Revision 2 Non-Proprietary September 2016 Copyright 2016 Korea Electric Power Corporation &

Korea Hydro & Nuclear Power Co., Ltd All Rights Reserved KEPCO & KHNP

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 REVISION HISTORY Page Revision Date Description (Section) 0 July. 2015 All Original Issue All - Revised revision number.

7 - Added shape factor .

8,10 - Added Hydrostatic Test.

7,8,14,56,58,59, - Editorially revised.

60,62 thru 65 1 December.2015 68,70,71,72,75, 77 thru 83 85 thru 91,93,94,95,98 56 - Added pressure calculation.

Appendix A - Added Elastic-Plastic Evaluation of Surge Line.

All - Revised revision number.

7,12 - Revised was 1.5. Added the description of .

12 - Revised PL+Pb was Pm+Pb.

2 September. 2016 18 - Added the method of decoupling.

42 - Added the description of correction factor(Ec/Eh).

Appendix A6 - Simplified elastic - plastic evaluation was added.

This document was prepared for the design certification application to the U.S. Nuclear Regulatory Commission and contains technological information that constitutes intellectual U

property of Korea Hydro & Nuclear Power Co., Ltd..

Copying, using, or distributing the information in this document in whole or in part is permitted only to the U.S.

Nuclear Regulatory Commission and its contractors for the purpose of reviewing design certification application materials. Other uses are strictly prohibited without the written permission of Korea Electric Power Corporation and Korea Hydro & Nuclear Power Co., Ltd.

KEPCO & KHNP i

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 ABSTRACT This report contains a summary of the structural evaluation of the Primary Piping The evaluations were performed based on the loading conditions defined in the APR1400 Primary Piping Design Specification (Ref.B.1) and on the design procedures in accordance with the requirements ASME Boiler and Pressure Vessel Section III, 2007 Edition with through 2008 Addenda (Ref.A.1).

The analyses and results presented demonstrate that seven parts of the Primary Piping that were evaluated satisfy all of the applicable structural limits of the ASME B&PV Code.

KEPCO & KHNP ii

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 TABLE OF CONTENTS REVISION HISTORY ........................................................................................................................... i ABSTRACT ........................................................................................................................................ ii TABLE OF CONTENTS .................................................................................................................... iii LIST OF TABLES ............................................................................................................................... v LIST OF FIGURES ........................................................................................................................... vii ACRONYMS AND ABBREVIATIONS ............................................................................................. viii

1. Introduction ............................................................................................................................ 1

2. Summary of Results .............................................................................................................. 2

3. Conclusions............................................................................................................................ 5

4. Assumptions and Open Items .............................................................................................. 6 4.1 Assumptions ......................................................................................................................... 6 4.2 Open Items ........................................................................................................................... 6

5. Code Requirements ............................................................................................................... 7 5.1 Stress Limits for Components other than Bolts .................................................................... 7 5.2 Analysis of Piping products .................................................................................................. 9 5.3 Special Stress Limits .......................................................................................................... 11 5.4 Application of Plastic Analysis ............................................................................................ 11

6. Allowable Limits ................................................................................................................... 12

7. Design Input ......................................................................................................................... 13 7.1 Geometry ............................................................................................................................ 13 7.2 Material ............................................................................................................................... 13 7.3 Loads, Load Combinations, and Transients ....................................................................... 18

8. Methodology ......................................................................................................................... 52 8.1 Thermal Analysis ................................................................................................................ 52 8.2 Structural Analysis .............................................................................................................. 52 8.3 Fatigue Analysis ................................................................................................................. 53

9. Computer Programs Used .................................................................................................. 54 9.1 AFPOST ............................................................................................................................. 54 9.2 NOZPROG ......................................................................................................................... 54 KEPCO & KHNP iii

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

10. Structural Evaluation Results ............................................................................................. 55 10.1 Primary Pipes and Elbows ................................................................................................. 55 10.2 Surge Line .......................................................................................................................... 57 10.3 Surge Nozzle ...................................................................................................................... 61 10.4 Charging Inlet Nozzle ......................................................................................................... 69 10.5 Drain Nozzle ....................................................................................................................... 76 10.6 Spray Nozzle ...................................................................................................................... 84 10.7 Shutdown Cooling System Outlet Nozzle .......................................................................... 92

11. References ............................................................................................................................ 99 Appendix A ..................................................................................................................................... A1 KEPCO & KHNP iv

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 LIST OF TABLES Table 2-1 Summary of Primary Pipes and Elbows Results .................................................. 3 Table 6-1 Allowable Limits .................................................................................................. 12 Table 7-1 Materials of Construction .................................................................................... 14 Table 7-2 Material Strength for SA-516 Gr. 70 ................................................................... 15 Table 7-3 Material Strength for SA-508 Gr. 1a ................................................................... 15 Table 7-4 Material Strength for SA-182 Gr. F316LN (t < 5 [in]) .......................................... 15 Table 7-5 Material Strength for SA-182 Gr. F347 (t < 5 [in]) .............................................. 16 Table 7-6 Material Strength for SA-376 TP 347 ................................................................. 16 Table 7-7 Material Strength for SA-403 WP 347 ................................................................ 16 Table 7-8 Material Strength for SB-166 N06690 ................................................................ 17 Table 7-9 Pressures and Temperatures ............................................................................. 18 Table 7-10 Force and Moments on Pipe Assembly P-1 ..................................................... 19 Table 7-11 Force and Moments on Pipe Assembly P-2 ..................................................... 21 Table 7-12 Force and Moments on Pipe Assembly P-3 ..................................................... 22 Table 7-13 Force and Moments on Pipe Assembly P-4 ..................................................... 24 Table 7-14 Force and Moments on Pipe Assembly P-5 ..................................................... 25 Table 7-15 RC Piping Nozzle Loads - Charging Inlet Nozzle ............................................. 28 Table 7-16 Piping Nozzle Loads - Spray Nozzle (Loop 2A) ............................................... 28 Table 7-17 Piping Nozzle Loads - Spray Nozzle (Loop 2B) ............................................... 29 Table 7-18 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 1A) .......................... 29 Table 7-19 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 1B) .......................... 30 Table 7-20 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 2A) .......................... 30 Table 7-21 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 2B) .......................... 30 Table 7-22 Piping Nozzle Loads - Shutdown Cooling Outlet (P-1) .................................... 31 Table 7-23 Piping Nozzle Loads - Shutdown Cooling Outlet (P-10) .................................. 32 Table 7-24 Piping Nozzle Loads - Hot Leg Surge Nozzle .................................................. 33 Table 7-25 Surge Line Piping Loads .................................................................................. 34 Table 7-26 RCS Design Transients .................................................................................... 46 Table 7-27 CVCS Design Transients .................................................................................. 47 Table 9-1 Computer Program Description .......................................................................... 54 Table 10-1 Structural Evaluation of Primary Pipes and Elbows ......................................... 56 Table 10-2 Design Evaluation of Surge Line ...................................................................... 58 Table 10-3 Level D Evaluation of Surge Line ..................................................................... 58 Table 10-4 Test Evaluation of Surge Line ........................................................................... 58 Table 10-5 Structural Evaluation of Surge Line .................................................................. 59 Table 10-6 Simplified Elastic-Plastic Evaluation of Surge Line .......................................... 60 Table 10-7 Contribution of Each Loading of Surge Line .................................................... 60 Table 10-8 Design Evaluation of Surge Nozzle .................................................................. 62 Table 10-9 Level D Evaluation of Surge Nozzle ................................................................. 63 Table 10-10 Test Evaluation of Surge Nozzle .................................................................... 64 Table 10-11 Triaxial stress Evaluation of Surge Nozzle ..................................................... 65 Table 10-12 Structural Evaluation of Surge Nozzle............................................................ 66 Table 10-13 Contribution of Each Loading of Surge Nozzle .............................................. 68 Table 10-14 Design Evaluation of Charging Inlet Nozzle ................................................... 70 Table 10-15 Level D Evaluation of Charging Inlet Nozzle .................................................. 70 Table 10-16 Test Evaluation of Charging Inlet Nozzle........................................................ 71 Table 10-17 Triaxial stress Evaluation of Charging Inlet Nozzle ........................................ 72 Table 10-18 Structural Evaluation of Charging Inlet Nozzle ............................................... 73 Table 10-19 Design Evaluation of Drain Nozzle ................................................................. 77 Table 10-20 Level D Evaluation of Drain Nozzle ................................................................ 78 Table 10-21 Contribution of Each Loading of Drain Nozzle ............................................... 78 Table 10-22 Test Evaluation of Drain Nozzle ..................................................................... 79 KEPCO & KHNP v

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-23 Triaxial stress Evaluation of Drain Nozzle ...................................................... 80 Table 10-24 Structural Evaluation of Drain Nozzle............................................................. 82 Table 10-25 Design Evaluation of Spray Nozzle ................................................................ 85 Table 10-26 Level D Evaluation of Spray Nozzle ............................................................... 86 Table 10-27 Test Evaluation of Spray Nozzle ..................................................................... 87 Table 10-28 Triaxial stress Evaluation of Spray Nozzle ..................................................... 88 Table 10-29 Structural Evaluation of Spray Nozzle ............................................................ 90 Table 10-30 Design Evaluation of Shutdown Cooling System Outlet Nozzle .................... 93 Table 10-31 Level D Evaluation of Shutdown Cooling System Outlet Nozzle ................... 93 Table 10-32 Test Evaluation of Shutdown Cooling System Outlet Nozzle ......................... 94 Table 10-33 Triaxial stress Evaluation of Shutdown Cooling System Outlet Nozzle ......... 95 Table 10-34 Structural Evaluation of Shutdown Cooling System Outlet Nozzle ................ 96 KEPCO & KHNP vi

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 LIST OF FIGURES Figure 1-1 General Configuration of PPG ............................................................................ 1 Figure 7-1 RC Piping Sections/End Locations and Coordinate System for Loads (P-1) ... 20 Figure 7-2 RC Piping Sections/End Locations and Coordinate System for Loads (P-2) ... 21 Figure 7-3 RC Piping Sections/End Locations and Coordinate System for Loads (P-3) ... 23 Figure 7-4 RC Piping Sections/End Locations and Coordinate System for Loads (P-4) ... 24 Figure 7-5 RC Piping Sections/End Locations and Coordinate System for Loads (P-5) ... 26 Figure 7-6 Charging Inlet Nozzle Load Conventions ......................................................... 28 Figure 7-7 Drain and Letdown Nozzle Load Conventions ................................................. 31 Figure 7-8 Hot Leg Surge Nozzle Load Conventions ........................................................ 33 Figure 7-9 Local coordinate system for Surge Line Pipe Loads (Straight element) .......... 43 Figure 7-10 Local coordinate system for Surge Line Pipe Loads (Elbow element) ........... 43 Figure 7-11 Location of Surge Line Loads ......................................................................... 44 Figure 10-1 Areas of Interest in Primary Pipes and Elbows ............................................... 55 Figure 10-2 Configuration of Surge Line ............................................................................ 57 Figure 10-3 Areas of Interest and Finite Element model in Surge Nozzle ......................... 61 Figure 10-4 Areas of Interest and Finite Element model in Charging Inlet Nozzle ............ 69 Figure 10-5 Areas of Interest and Finite Element model in Drain Nozzle .......................... 76 Figure 10-6 Areas of Interest and Finite Element model in Spray Nozzle ......................... 84 Figure 10-7 Areas of Interest and Finite Element model in SCO Nozzle ........................... 92 KEPCO & KHNP vii

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 ACRONYMS AND ABBREVIATIONS Pm General Primary Membrane Stress [ksi]

PL Local Primary Membrane Stress [ksi]

Pb Primary Bending Stress [ksi]

Q Secondary Stress [ksi]

SI Stress Intensity [ksi]

Sm Design Stress Intensity [ksi]

Sy Yield Strength [ksi]

Su Tensile Strength [ksi]

APR1400 Advanced Power Reactor 1400 BLPB Branch Line Pipe Break CUF Cumulative Fatigue Usage Factor CVCS Chemical and Volume Control System DWT Dead Weight EFVO Economizer Feedwater Valve Opening IRWST In-containment Refueling Water Storage Tank I.D.(ID) Inside Diameter NOP Normal Operation NPS Nominal Pipe Size O.D.(OD) Outside Diameter POSRV Pilot Operated Safety Relief Valves PPG Primary Piping RC Reactor Coolant RCS Reactor Coolant System RTD Resistance Temperature Detector RPCS Reactor Power Cutback System SAM Seismic Anchor Motion SCF Stress Concentration Factor SCO Shutdown Cooling Outlet SIS/SCS Safe Injection System/Shutdown Cooling System SRSS Square-Root-of-the-Sum-of-the-Squares SSE Safe Shutdown Earthquake KEPCO & KHNP viii

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Page intentionally blank KEPCO & KHNP ix

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

1. Introduction This technical report contains a summary of the stress analysis results for the APR1400 Primary Piping. The content of this report follows the ASME guidelines for Design Reports as specified in Section III Division 1 Non-mandatory Appendix C.

Figure 1-1 shows a general configuration of the PPG. This report provides the structural evaluation for seven parts of PPG. This technical report summarizes the stress results based on the detailed analyses that demonstrate the validity of the Primary Piping to meet the requirements of the ASME Boiler and Pressure Vessel Code (Ref.A.1).

Surge Line Shutdown Cooling Outlet Nozzle Surge Nozzle Charging Inlet Spray Nozzle Nozzle Primary Pipe and Elbow Drain Nozzle Figure 1-1 General Configuration of PPG KEPCO & KHNP 1

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

2. Summary of Results All the stresses and cumulative fatigue usage factors (CUF) are satisfactory and meet all the requirements of the ASME Boiler and Pressure Vessel Code,Section III, 2007 Edition with through 2008 Addenda (Ref.A.1). Therefore, the structural integrity of the APR1400 PPG has been justified.

Table 2-1 summarizes the most significant structural evaluation results and the detailed evaluation for each part is presented in the corresponding section noted in the tabled.

KEPCO & KHNP 2

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 2-1 Summary of Primary Pipes and Elbows Results TS (1)

(Section) Part Condition Area of Interest Criteria Ratio Design Level D (10.1) Primary Pipe and Elbow Service Level A, B Design Level D (10.2) Piping Surge Line Service Level A, B Test Design Level D (10.3) Surge Service Nozzle Level A, B Test Design Level D (10.4)Charging Service Inlet Nozzle Level A, B Test Design Level D (10.5)Drain Nozzle Service Level A, B Test KEPCO & KHNP 3

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 2-1 Summary of Primary Pipes and Elbows Results (Cont`d)

TS (1)

(Section) Part Condition Area of Interest Criteria Ratio Design Level D (10.6)Spray Service Nozzle Level A, B Test Design Level D (10.7)Shutdown Cooling Outlet Service Nozzle Level A, B Test Notes)

(1) Ratio = (Calculated Stress or CUF) / (Allowable).

(2) Since the total stress ranges of some load pairs contributing this CUF exceed 2*Sy, the requirements of NB-3227.6 are applied to adjust the Poisson`s ratio and fatigue usage factors.

(3) Since the range of primary plus secondary stress intensities exceeds the allowable of 3*Sm.

It is alternatively justified in accordance with the simplified elastic-plastic analysis set forth in NB-3653.6 of Ref A.1 KEPCO & KHNP 4

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

3. Conclusions The APR1400 PPG is designed to the requirements of the ASME Boiler and Pressure Vessel Code, 2007 Edition up to and including 2008 Addenda for those loads specified in the Design Specification (Ref.B.1).

KEPCO & KHNP 5

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

4. Assumptions and Open Items 4.1 Assumptions

1. The material strength for the allowable limit is obtained at the design temperature for conservatism, otherwise noted.

2. All the dimensions consider the most adverse effect of tolerances on diameter/radii and thickness to maximize the pressure radius and to minimize the metal volume.

4.2 Open Items There are no items to be identified.

KEPCO & KHNP 6

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

5. Code Requirements 5.1 Stress Limits for Components other than Bolts NB-3220 of Ref.A.1 presents limits for components other than bolts. For Service Level D condition, the rules of Appendix F of Ref.A.1 apply.

Design Condition Pm Sm PL 1.5*Sm Pm + Pb *Sm PL + Pb *Sm 160 0 3 3

( is the shape factor, = The value of is not exceed 1.5, 1.5) 3 0 4 4 Service Level A Condition (Normal)

Maximum Range of PL + Pb + Q 3*Sm (including Service Level B and Test conditions)

Cumulative Fatigue Usage Factor 1.0 (including Service Level B and Test conditions)

Thermal Stress Ratchet (NB-3222.5)

To ensure that the possibility of large distortions developing due to ratchet action will not occur, the maximum cyclic thermal stress range for components loaded by internal pressure is limited. The maximum cyclic thermal stress range must be shown to be less than the calculated limit, which is:

maximum range y'*Sy For linear variation of temperature through the shell wall, y' = 1/x for 0 < x < 0.5

= 4*(1-x) for 0.5 < x < 1.0 For parabolic constantly increasing or constantly decreasing variation of temperature through the shell wall, y' = 4.65 for x = 0.3

= 3.55 for x = 0.4

= 2.70 for x = 0.5

= 5.2*(1-x) for 0.615 < x < 1.0 where, x = Pm /Sy (or PL/Sy is sometimes used for conservatism).

Service Level B Condition (Upset)

Pm 1.1*Sm PL 1.1(1.5*Sm)

Pm + Pb 1.1(*Sm)

PL + Pb 1.1(*Sm) 160 0 3 3

( is the shape factor, = , The value of is not exceed 1.5, 1.5) 3 0 4 4 Service Level D Condition (Faulted)

For Non-ferritic materials:

Pm Lesser of 2.4*Sm or 0.7*Su PL Lesser of 3.6*Sm or 1.05*Su PL + Pb Lesser of 3.6*Sm or 1.05*Su For Ferritic materials:

Pm 0.7*Su KEPCO & KHNP 7

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 PL 1.05*Su PL + Pb 1.05*Su Test Condition (Hydrostatic Test)

Pm 0.9*Sy Pm + Pb 1.35*Sy for Pm 0.67*Sy or Pm + Pb (2.15*Sy - 1.2*Pm) for 0.67*Sy < Pm < 0.90*Sy Maximum Range of (Pm or PL) + Pb + Q greater of 3*Sm or 2*Sy (when at least one extreme of the stress intensity range is determined by the test loadings)

Cumulative Fatigue Usage Factor 1.0 (included with Service Level A and B conditions)

KEPCO & KHNP 8

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 5.2 Analysis of Piping products NB-3650 of Ref.A.1 presents evaluation for piping products.

Design Condition The primary stress intensity shall be satisfied equation (1).

1 + 2 1.5 eq. (1) 2 2 Where, 1 , 2 = primary stress indices for the specific product under investigation in NB-3680 of Ref.A.1

= outside diameter of pipe, in. (mm) 4 4 I = moment of inertia, in (mm )

= resultant moment due to a combination of design mechanical loads, in. lb.(N mm)

P = Design Pressure, psi (MPa)

= allowable design stress intensity value, psi (MPa) t = nominal wall thickness of product, in. (mm)

Service Level A Condition (Normal)

Primary plus secondary stress intensity ranges due to all pair of load sets shall be satisfied equation (2). (including Service Level B and Test conditions)

= 1 + 2 + 3 x l l 3 eq. (2) 2 2 Where, 1 , 2 , 3 = secondary stress indices for the specific component under investigation in NB-3680 of Ref.A.1

, , , = as defied for eq. (1)

= average modulus of elasticity of the two sides of a gross structural discontinuity or Material discontinuity at room temperature, psi (MPa)

= resultant range of moment which occurs when the system goes from one service load set to another, in. lb. (N mm)

= range of service pressure, psi (MPa)

( ) = range of average temperature on side a(b) of gross structural discontinuity or material discontinuity, °F (°C). For generally cylindrical shapes, the averaging of T (NB-3653.2) shall be over a distance of for and over a distance for .

( ) = coefficient of thermal expansion on side a(b) of a gross structural discontinuity or material discontinuity, at room temperature, 1/ °F (1/°C)

Cumulative Fatigue Usage Factor 1.0 (including Service Level B and Test conditions)

Thermal Stress Ratchet (NB-3653.7)

For all pair of load sets, the value of the range of 1 cannot exceed that calculated as follows:

1 range 0.7 4 where 4 = 1.1 for ferritic material

= 1.3 for austenitic material

= modulus of elasticity (E) times the mean coefficient of thermal expansion () both at room temperature, psi /°F (MPa/°C)

P = maximum pressure for the set of conditions under consideration, psi (MPa)

= yield strength value, psi (MPa), taken at average fluid temperature of the transient under consideration P 1 x = ( )( )

2

= 3.33, 2.00, 1.20, and 0.80 for xp0.3, 0.5, 0.7, and 0.8, respectively Service Level B Conditions (Upset)

The primary stress intensity shall be satisfied equation (3).

KEPCO & KHNP 9

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 1 + 2 1.8 1.5 eq. (3) 2 2 Where, 1 , 2 , , I, t, = as defined for eq. (1)

Mi = resultant moment due to a combination of level B mechanical loads, in. lb.

(N mm), which do not include reversing dynamic load.

P = level B pressure, psi (MPa)

= as defined for eq. (3)

Service Level D Condition (Faulted)

The primary stress intensity shall be satisfied equation (5).

1 + 2 3.0 2.0 eq. (5) 2 2 Where, 1 , 2 , , I, t, = as defined for eq. (1)

= resultant moment due to a combination of service level D mechanical loads, in. lb. (N mm),

which do not include reversing dynamic load.

P = Service level D pressure, psi (MPa)

= as defined for eq. (3)

If the effects of anchor motion, , from reversing dynamic loads are not considered in level B condition, then following requirements shall be satisfied.

2 < 6.0 2

2 2 Where, = cross-sectional area of metal in the piping component wall, in. (mm )

Piping displacements shall satisfy design specification limitation. (Ref.B.1)

Test Condition (Hydrostatic Test)

Pm 0.9*Sy Pm + Pb 1.35*Sy for Pm 0.67*Sy or Pm + Pb (2.15*Sy - 1.2*Pm) for 0.67*Sy < Pm < 0.90*Sy Maximum Range of (Pm or PL) + Pb + Q greater of 3*Sm or 2*Sy (when at least one extreme of the stress intensity range is determined by the test loadings)

Cumulative Fatigue Usage Factor 1.0 (included with Service Level A and B conditions)

KEPCO & KHNP 10

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 5.3 Special Stress Limits NB-3227 of Ref.A.1 presents the special stress limits. These limits are applicable for components other than bolts. The rules of Appendix F of Ref.A.1 also apply here for the Service Level D condition.

Tri-axial Stresses (NB-3227.4)

The algebraic sum of the three primary principal stresses (s1, s2, s3) shall be limited as shown below except for Service Level D loading conditions.

s1 + s2 + s3 < 4*Sm s1 + s2 + s3 < 4.8*Sm (For Service Level C Condition as per NB-3224.3)

Applications of Elastic Analysis for Stresses beyond the Yield Strength (NB-3227.6)

NB-3227.6 of Ref.A.1 is applicable when total stress range exceeds twice the yield strength of material. If total stresses exceed the yield strength, the Poissons ratio correction is applicable to the local thermal stress with following expression.

= 0.5 0.2 , 0.3 where, Sa : Value obtained from the applicable design fatigue curve for the specified number of cycles of the condition being considered Sy : Yield strength of the material at the mean value of the temperature of the cycle 5.4 Application of Plastic Analysis NB-3228 of Ref.A.1 provides guidance in the application of plastic analysis and some relaxation of the basic stress limits which are allowed if plastic analysis is used.

Simplified Elastic-Plastic Analysis (NB-3228.5)

The 3*Sm limit on the range of primary plus secondary stress intensity (NB-3222.2) may be exceeded provided that the requirements of NB-3228.5 are met.

Simplified Elastic-Plastic Analysis (NB-3653.6)

If NB-3653.1 eq.(10) cannot be satisfied for all pairs of load sets, the alternative analysis described below may still permit qualifying the component under NB-3650. Only those pairs of load sets which do not satisfy eq. (10) need be considered. The requirements of NB-3653.6 are met KEPCO & KHNP 11

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

6. Allowable Limits The allowable stress limits according Ref.A.1 are summarized in Table 6-1.

Table 6-1 Allowable Limits Condition Code Criteria Pm Sm PL 1.5*Sm (1)

Design Pm + Pb *Sm PL + Pb *Sm Triaxial 4*Sm (1) P+Q Range 3*Sm Service Level A, B Fatigue -

Pm 2.4*Sm or 0.7*Su (2)

Service Level D PL 3.6*Sm or 1.05*Su PL + Pb 3.6*Sm or 1.05*Su Pm 0.9*Sy (3)

Pm + Pb 1.35*Sy (4)

(1) Pm + Pb 2.15*Sy - 1.2*Pm Test Triaxial 4*Sm 3*Sm P+Q Range (5) 2*Sy Notes)

(1) See Section 5.2 for the use of NB-3600 of Ref. A.1.

(2) See Section 5.1 for the ferritic and non-ferritic materials.

(3) For Pm 0.67*Sy (4) For 0.67*Sy < Pm < 0.90*Sy (5) Greater of 3*Sm or 2*Sy when at least one extreme of range is determined by test loadings.

(6) The value of is not exceed 1.5, 1.5 KEPCO & KHNP 12

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

7. Design Input 7.1 Geometry The APR1400 PPG component design drawings used for the analyses are taken from Ref.F.

Figures describing the detailed geometry and dimensions of the parts evaluated are provided in the Section 10.

7.2 Material The materials of construction of the PPG are listed in Table 7-1.

The material properties used in the stress evaluation are provided in Tables 7-2 through 7-8, below.

All the material properties are excerpted from ASME Section II (Ref.A.2).

KEPCO & KHNP 13

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-1 Materials of Construction Part or Assembly Material Specification Base metal for 42 and 30 elbow SA-516 Grade 70 SA-508 Grade 1a Base metal for 42 and 30 pipe SA-508 Grade 1a Surge line SA-376 TP347 (Pipe)

SA-403 WP347 (Elbow)

SB-166 (N06690) (Instrument Nozzles)

Surge Nozzle SA-508 Grade 1a (Nozzle)

SA-182 F347 (Safe End)

Charging Inlet Nozzle SA-508 Grade 1a (Nozzle)

SB-166 N06690 (Safe End)

Drain Nozzle SA-508 Grade 1a (Nozzle)

SA-182 F316LN (Safe End)

Spray Nozzle SA-508 Grade 1a (Nozzle)

SA-182 F316LN (Safe End)

Shutdown Cooling Outlet Nozzle SA-508 Grade 1a (Nozzle)

SA-182 F316LN (Safe End)

Cladding SFA-5.4 Type 308L and/or Type 309L SFA-5.9 Type 308L and/or Type 309L SFA-5.22 Type 308L and/or Type 309L (Type 309L is used for the first layer of cladding), or Ni-Cr-Fe alloy(UNS W86152 and UNS N06052 of reference 3.1.1.2(Ref.B.1) or UNS N06054 of Reference 3.1.4.1(Ref.B.1))

KEPCO & KHNP 14

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-2 Material Strength for SA-516 Gr. 70 o

Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 23.30 38.00 70.00 100 23.30 38.00 70.00 200 23.20 34.80 70.00 300 22.40 33.60 70.00 400 21.60 32.50 70.00 500 20.60 31.00 70.00 600 19.40 29.10 70.00 700 18.10 27.20 70.00 Table 7-3 Material Strength for SA-508 Gr. 1a o

Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 23.30 36.00 70.00 100 23.30 36.00 70.00 200 22.00 33.00 70.00 300 21.20 31.80 70.00 400 20.50 30.80 70.00 500 19.60 29.30 70.00 600 18.40 27.60 70.00 700 17.20 25.80 70.00 Table 7-4 Material Strength for SA-182 Gr. F316LN (t < 5 [in])

o Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 20.00 30.00 75.00 100 20.00 30.00 75.00 200 20.00 25.50 75.00 300 20.00 22.90 70.70 400 18.60 21.00 67.10 500 17.50 19.50 64.60 600 16.60 18.30 63.30 700 15.80 17.30 62.40 KEPCO & KHNP 15

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-5 Material Strength for SA-182 Gr. F347 (t < 5 [in])

o Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 20.00 30.00 75.00 100 20.00 30.00 75.00 200 20.00 27.60 71.70 300 20.00 25.70 65.90 400 20.00 24.00 62.10 500 20.00 22.60 60.00 600 19.30 21.50 59.10 700 18.70 20.70 58.80 Table 7-6 Material Strength for SA-376 TP 347 o

Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 20.00 30.00 75.00 100 20.00 30.00 75.00 200 20.00 27.60 71.70 300 20.00 25.70 65.90 400 20.00 24.00 62.10 500 20.00 22.60 60.00 600 19.30 21.50 59.10 700 18.70 20.70 58.80 Table 7-7 Material Strength for SA-403 WP 347 o

Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 20.00 30.00 75.00 100 20.00 30.00 75.00 200 20.00 27.60 71.70 300 20.00 25.70 65.90 400 20.00 24.00 62.10 500 20.00 22.60 60.00 600 19.30 21.50 59.10 700 18.70 20.70 58.80 KEPCO & KHNP 16

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-8 Material Strength for SB-166 N06690 o

Temperature [ F] Sm [ksi] Sy [ksi] Su [ksi]

70 23.30 35.00 85.00 100 23.30 35.00 85.00 200 23.30 31.70 85.00 300 23.30 29.80 84.00 400 23.30 28.60 82.00 500 23.30 27.90 80.80 600 23.30 27.60 80.20 700 23.30 27.50 79.80 KEPCO & KHNP 17

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 7.3 Loads, Load Combinations, and Transients The loads, load combinations, and transients are defined the Design Specification (Ref.B.1).

Following is the summary of those used for the PPG structural evaluations.

All branch pipe lines are eliminated from the RCS model because the mass and rigidity of the piping do not significantly influence the dynamic behavior of the RCS. This dynamic decoupling is in accordance with the decoupling criteria for the seismic analysis specified in NUREG-0800, SRP 3.7.2 (Ref. A.3).

a. Pressure Loads and Temperature Table 7-9 Pressures and Temperatures Parameter Value Design Pressure 2500 psia (2485 psig)

Nominal Operating Pressure 2250 psia (2125 psig) o Design Temperature (Hot & Cold Legs) 650 F o

Design Temperature (Surge Line) 700 F o

Normal Operating Hot Leg Temperature 615 F o

Normal Operating Cold Leg Temperature 555 F o

Normal Operating Surge Line Temperature 615 F

- Hot Leg End o

Normal Operating Surge Line Temperature 652.7 F

- Pressurizer End KEPCO & KHNP 18

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Mechanical Loads Table 7-10 Force and Moments on Pipe Assembly P-1 TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Dead Weight C

D A

B NOP 1 C

D A

B NOP 2 C

D A

B Normal NOP 3 C

D A

B NOP 4 C

D A

B NOP 5 C

D KEPCO & KHNP 19

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-10 Force and Moments on Pipe Assembly P-1(Contd)

TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Seismic(SSE)

C D

A B

BLPB C

D A

B IRWST C

D Figure 7-1 RC Piping Sections/End Locations and Coordinate System for Loads (P-1)

KEPCO & KHNP 20

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-11 Force and Moments on Pipe Assembly P-2 TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

Dead Weight B

A NOP 1 B

A NOP 2 B

A Normal NOP 3 B

A NOP 4 B

A NOP 5 B

A Seismic(SSE)

B A

BLPB B

A IRWST B

Figure 7-2 RC Piping Sections/End Locations and Coordinate System for Loads (P-2)

KEPCO & KHNP 21

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-12 Force and Moments on Pipe Assembly P-3 TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Dead Weight C D

E A

B NOP 1 C D

E A

B NOP 2 C D

E A

B Normal NOP 3 C D

E A

B NOP 4 C D

E A

B NOP 5 C D

E KEPCO & KHNP 22

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-12 Force and Moments on Pipe Assembly P-3 (Contd)

TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Seismic(SSE) C D

E A

B BLPB C D

E A

B IRWST C D

E Figure 7-3 RC Piping Sections/End Locations and Coordinate System for Loads (P-3)

KEPCO & KHNP 23

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-13 Force and Moments on Pipe Assembly P-4 TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

Dead Weight B

A NOP 1 B

A NOP 2 B

A Normal NOP 3 B

A NOP 4 B

A NOP 5 B

A Seismic(SSE)

B A

BLPB B

A IRWST B

Figure 7-4 RC Piping Sections/End Locations and Coordinate System for Loads (P-4)

KEPCO & KHNP 24

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-14 Force and Moments on Pipe Assembly P-5 TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Dead Weight C

D A

B NOP 1 C

D A

B NOP 2 C

D A

B Normal NOP 3 C

D A

B NOP 4 C

D A

B NOP 5 C

D KEPCO & KHNP 25

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-14 Force and Moments on Pipe Assembly P-5 (Contd)

TS End or Force [kips] Moment [ft*kips]

Loading Section Fa Fb Fx Ma Mb Mc A

B Seismic(SSE)

C D

A B

BLPB C

D A

B IRWST C

D Figure 7-5 RC Piping Sections/End Locations and Coordinate System for Loads (P-5)

KEPCO & KHNP 26

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Notes)

1. a) The Force and Moments listed on Table 7-10 through 7-14 are for the reactor coolant piping subassemblies located as shown on Table 9(page 3 of 20) of Ref B.1.

These tables also provide the Forces and Moments at intermediate nozzle sections.

b) Intermediate nozzle sections are intersection points of RCS main loop piping center line at nozzle locations.

2. The coordinate system and sign convention for the data provided is Local as shown in Table 9 (page 3 through 5 of 20) of Ref B.1.

3. The end identification for the forces and moments on piping subassemblies is shown on Table 9(page 3 of 20) of Ref B.1.

4. The section identification for the forces and moments of the piping assemblies at intermediate nozzle locations is provided on Table 9(page 3 of 20) of Ref B.1.

5. The seismic loadings tabulated on the following pages are combined loads accounting for the simultaneous application of three mutually perpendicular components of earthquake excitation.

6. The sign of each component of seismic, IRWST discharge, and branch line pipe break loads should be chosen such that the combination results in the most sever loading.

7. NOP 1 = Dead Weight + Thermal w/o friction at full power NOP 2 = Dead Weight with friction at start of heat up NOP 3 = Dead Weight + Thermal with friction at end of heat up NOP 4 = Dead Weight + Thermal with friction at start of cooldown NOP 5 = Dead Weight with friction at end of cooldown

8. SSE, BLPB and IRWST do not include NOP loads.

9. Unsigned Loads are +

10. Applied forces and moments of assemblies in loop 1B, 2A, and 2B are identical to those of assemblies in loop 1A respectively except for the sign convention as follows:

a) Sign conventions of assemblies P-6 through P-9 are symmetric to those of assemblies P-2 through P-5 about global X-axis.

b) Sign convention of assembly P-10 is symmetric to that of assembly P-1 about global X and Z-axis.

c) Sign conventions of assemblies P-11 through P-14 are symmetric to those of assemblies P-2 through P-5 about global X and Z-axis.

d) Sign conventions of assemblies P-15 through P-18 are symmetric to those of assemblies P-2 through P-5 about global Z-axis.

KEPCO & KHNP 27

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-15 RC Piping Nozzle Loads - Charging Inlet Nozzle TS Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB Notes)

1. Tabulated loads are located at the safe end of the nozzle.

2. The Seismic (SSE) loads are considered separately such as inertia and Sam effects.

3. Unsigned loads are absolute values. Their sign must be chosen either + or - to give the most severe loading combination. Positive forces act in the direction shown, negative forces act in the opposite direction.

Figure 7-6 Charging Inlet Nozzle Load Conventions Table 7-16 Piping Nozzle Loads - Spray Nozzle (Loop 2A)

TS (1) Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB (2)

Valve Operation KEPCO & KHNP 28

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-17 Piping Nozzle Loads - Spray Nozzle (Loop 2B)

TS (1) Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB (2)

Valve Operation Notes)

1. See RC Piping Nozzle Loads - Charging Inlet Nozzle (Table 9, Page 11 of Ref B.1) for coordinate system and notes.

2. Valve Operation loads shall be combined for Level A and B conditions as follows:

Level A : NOP + Valve Operation

• 2 2 1/2 Level B : NOP + [(1/2 SSE) + (IRWST + Valve Operation) ]

• ; NOP loads means Dead weight for nozzle safe end, Dead weight and Thermal load for reinforcement region and nozzle to primary piping.

Table 7-18 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 1A)

TS Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB KEPCO & KHNP 29

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-19 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 1B)

TS Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB Table 7-20 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 2A)

TS Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB Table 7-21 Piping Nozzle Loads - Drain and Letdown Nozzle (Loop 2B)

TS Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Normal Weight Operation (DWT)

Thermal SAM Seismic (SSE) Inertia IRWST BLPB Notes)

1. See RC Piping Nozzle Loads - Charging Inlet Nozzle (Table 9, Page 11 of Ref B.1) for coordinate system and notes.

2. Fb is parallel to Hot Leg. It is not parallel to Suction Leg.

KEPCO & KHNP 30

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Figure 7-7 Drain and Letdown Nozzle Load Conventions Table 7-22 Piping Nozzle Loads - Shutdown Cooling Outlet (P-1)

TS (1) Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Weight (DWT)

Thermal 1 Normal Thermal 2 Operation Thermal 3 Thermal 4 Thermal 5 Thermal 6 Thermal 7 SAM Seismic (SSE) Inertia IRWST BLPB (2)

SRTH KEPCO & KHNP 31

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-23 Piping Nozzle Loads - Shutdown Cooling Outlet (P-10)

TS (1) Force [lbs] Moment [ft-lbs]

Loading Fa Fb Fx Ma Mb Mc Dead Weight (DWT)

Thermal 1 Normal Thermal 2 Operation Thermal 3 Thermal 4 Thermal 5 Thermal 6 Thermal 7 SAM Seismic (SSE) Inertia IRWST BLPB (2)

SRTH Notes)

1. See RC Piping Nozzle Loads - Charging Inlet Nozzle (Table 9, Page 11 of Ref B.1) for coordinate system and notes, except that the NOP loads (i.e., Dead Weight and Thermal) are algebraic values.

2. SRTH (LTOP valve discharge thrust) loads shall be combined for Level B condition as follows; 2 2 1/2

3. Level B : NOP* + [1/2 SSE] + (IRWST + SRTH) ]

4. * ; NOP loads mean Dead weight for nozzle safe end, Dead weight and Thermal load for reinforcement region and nozzle to primary piping.

5. For a fatigue analysis, 180 full load cycles of the SRTH (i.e, LTOP valve discharge thrust) loads shall be used.

KEPCO & KHNP 32

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-24 Piping Nozzle Loads - Hot Leg Surge Nozzle TS (1) Force [kips] Moment [in-kips]

Loading Fa Fb Fx Ma Mb Mc Dead Weight Thermal at 653°F (5)

Start. Flow (38°F T)

(5)

Normal Start. Flow (67°F T)

(5)

Start. Flow (98°F T)

(5)

Start. Flow (103°F T)

(5)

Start. Flow (340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break Notes)

1. Tabulated loads are located at the safe end of the nozzle.

2. Unsigned loads are absolute values. Their sign must be chosen either + or - to give the most sever loading combination. Positive forces act in the direction shown, negative forces act in the opposite direction.

3. Thermal loads excluding dead weight reflect the maximum effects of uniform expansion.

4. Stratified flow loads exclude dead weight.

5. See page 42 for load definition Plan View Figure 7-8 Hot Leg Surge Nozzle Load Conventions KEPCO & KHNP 33

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads TS

(*)

Location Piping Moments, in-kips 1 10 Load Case Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 34

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 2 211 S1X H1Y Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 35

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 5 511 61 611 Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 36

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 62 622 H2Y S2Y Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 37

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 71 711 72 722 Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 38

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips S3Z H3Y 73 74 Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 39

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 8 811 R1X 9 Load Case Ma Mb Mc Ma Mb Mc Ma Mb Mc Ma Mb Mc Dead Weight Thermal at 653°F Start. Flow (5)

(38°F T)

Start. Flow (5)

Normal (67°F T)

Start. Flow (5)

(98°F T)

Start. Flow (5)

(103°F T)

Start. Flow (5)

(340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break KEPCO & KHNP 40

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-25 Surge Line Piping Loads (Contd)

TS

(*)

Location Piping Moments, in-kips 911 Load Case Ma Mb Mc Dead Weight Thermal at 653°F (5)

Start. Flow (38°F T)

(5)

Normal Start. Flow (67°F T)

(5)

Start. Flow (98°F T)

(5)

Start. Flow (103°F T)

(5)

Start. Flow (340°F T)

SSE Inertia SSE SAMs IRWST Inertia IRWST Anchor Motion Branch Line Pipe Break Notes)

1. Tabulated loads are located at the safe end of the nozzle.

2. Unsigned loads are absolute values. Their sign must be chosen either + or - to give the most severe loading combination. Positive forces act in the direction shown, negative forces act in the opposite direction.

3. Thermal loads excluding dead weight reflect the maximum effects of uniform expansion.

4. Stratified flow loads excluded dead weight.

5. Asterisk mark(*) is the location corresponding to Figure 7-11

6. See Page 11 of Figure 6 for supports location (H1Y, H2Y, H3Y, S1X, S2Y, S3Z & R1X).

KEPCO & KHNP 41

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

c. Notes to Surge Line Pipe Loads

1. Units are kips and in-kips.

2. Loads are provided in local coordinate systems defined on Page 43.

3. Load cases are defined as:

a) Dead Weight - Weight loads at cold shutdown condition which include the weight of the piping, water, and insulation.

b) Thermal at 653°F - Thermal normal operating condition without stratified flow.

c) Strat. Flow (38°F) - Thermal stratified flow normal, upset, and faulted operating conditions with temperature delta of 38°F.

d) Strat. Flow (67°F) - Thermal stratified flow normal operating condition with temperature delta of 67°F.

e) Strat. Flow (98°F) - Thermal stratified flow condition with temperature delta of 98°F.

This case shall be used for normal, upset and faulted operating conditions except T = 340°F during heatup and cooldown.

f) Strat. Flow (103°F) - Thermal stratified flow upset operating condition with temperature delta of 103°F.

g) Strat. Flow (340°F) - Thermal stratified flow condition with temperature delta of 340°F to be used during heatup and cooldown transients.

h) SSE - Seismic SSE condition which includes the effects of anchor and support displacements.

i) BLPB - Maximum branch line pipe break loads from all potential BLPB conditions.

j) IRWST - In-Containment Refueling Water Storage discharge condition.

4. Each of the stratified flow conditions corresponds to a steady state cross-section temperature distribution in the piping which results from the application of the fluid condition in the surge line for the event. The temperature distribution produces a section rotation which induces bending in the surge line and produces the piping moments. The temperature distribution is non-linear which also imposes local thermal stresses which shall be considered in the design of the piping.

5. Unsigned loads are +.

6. The pipe moment for the load case titled Thermal at 653°F and the Stratified cases except the nozzle location 1 and 10 were multiplied by Ec/Eh (Cold elastic modulus/Hot elastic modulus).

7. The bending moments developed at location 1 and 10 by thermal contraction and expansion are to be multiplied by Ec/Eh, according to Para. NB-3672.5 of Ref.A,1 Instead of multiplying the moment values, the coefficients of Mi, Mi*, Mi, were multiplied by the ratio of Ec/Eh.

KEPCO & KHNP 42

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

d. Local coordinate system for Surge Line Pipe Loads Figure 7-9 Local coordinate system for Surge Line Pipe Loads (Straight element)

1. Straight element (1) The positive a direction is always along the element, directed from the hot leg toward the pressurizer, the pressurizer, the positive b direction is up, and the positive c direction is according to the right hand rule.

(2) If the direction a is vertical, the directions b and c shall be such that the positive b direction is parallel to the global (-)x defined on Figure 7-11.

Figure 7-10 Local coordinate system for Surge Line Pipe Loads (Elbow element)

2. Elbow element (1) At any point in an elbow element, the positive a direction is tangent to the curve, directed from the hot leg toward the pressurizer, the positive c direction is toward the center of curve, and the positive b direction is according to the right hand rule.

Note:

a) Point A is corresponding to locations 2, 5, 61, 62, 71, 72, 8 and 9 in Figure 7-11.

b) Point B is corresponding to locations 211, 511, 611, 622, 711, 722, 811 and 911 in Figure 7-11.

KEPCO & KHNP 43

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Figure 7-11 Location of Surge Line Loads

e. Transient Loads The design transients used in the structural evaluations are listed in Table 7-26 and 7-27. These transients are determined based on a 60-year plant operating period and are classified as Service Level A (Normal), Service Level B (Upset), and Service Level D (Faulted), and Test conditions.

There are no design basis events which result in Service Level C (Emergency) loads as specified in the Design Specification (Ref.B.1). Figure 4 of Ref.B.1 graphically presents the pressure, temperature, and flow rate information of each transient and the transients are grouped into seven regions in the PPG as shown below.

KEPCO & KHNP 44

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Group No. Locations / Parts of Steam Generator

- Hot Leg Nozzles 2

- Sampling & Press. Measurement Nozzles 3 - Cold Leg Nozzles

- Spray Nozzles Letdown & Drain Nozzles 5A - Hot Leg Nozzles 5B - Surge Line Nozzles 15 - SCS Outlet Nozzles 19 - Charging Inlet Nozzle (CVCS DBE)

KEPCO & KHNP 45

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-26 RCS Design Transients TS (1)

Transient Description Occurrences 1A 1B 2A 2B 3A 3B Service 3C Level A (Normal) 4A 4B 5

6 7

8 9

Test 1

2 Service 3 Level B (Upset) 4 5

6 1

Service 2 Level D 3 (Faulted) 4 5

Notes) TS KEPCO & KHNP 46

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-27 CVCS Design Transients TS (1)

Transient Description Occurrences 1

2 3-1 3-2 4

5 Service 6-1 Level A (Normal) 6-2 6-3 7-1 7-2 7-3 8

9 10 KEPCO & KHNP 47

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 7-27 CVCS Design Transients (Cont`d)

TS (1)

Transient Description Occurrences Service 11-1 Level A (Normal) 11-2 Test 1

2 3

4 Service 5 Level B (Upset) 6 7

8 9

1 Service Level D 2 (Faulted) 3 4

Notes)

(1) Total number of occurrences over 60 years for design purpose.

(2) This transient indicates the Group 19(Charging Inlet Nozzle) of Figure 4(Ref.B.1)

KEPCO & KHNP 48

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

f. Load Combinations The loading combinations included in Design, Service Level A, Level B, Level C, Level D and Test Conditions are to be combined and categorized as defined below.

Additional requirements of the loading, load combination and fatigue analysis are defined on Table 10 through Table 7-14, as applicable. The resultant stresses shall be within the allowable service limits as defined in ASME Section III, NB-3220 of Ref. E1

1. Design Condition Mechanical loads as provided within Ref.B.1 shall be combined as defined in A through C below.

A. Design pressure + dead weight (DWT)

(*)

B. Design pressure + full power normal operation (NOP)

C. Design pressure + DWT + IRWST discharge loads (including IRWST discharge anchor motion loads for surge line piping).

(*) When required by Ref.B.1, such as at integral supports and at reinforcement regions of nozzles, use design pressure plus normal operation plus IRWST discharge loads.

2. Service Level A (Normal) Condition Normal operation loads including dead weight as provided in Tables 9 & 10 of Ref.B.1 in conjunction with the normal transients (Table 5, Figure 4, and Section 6.5.1.5 of Ref.B.1) plus the pump vibratory excitations (Section 6.5.1.4 of Ref.B.1).

3. Service Level B (Upset) Condition (3)(4)

Normal operation (including dead weight), SSE and IRWST discharge loads as provided in Tables 8 & 9 of Ref.B.1 in conjunction with the upset transients (Table 5, Figure 4, and Section 6.5.1.5 of Ref.B.1).

TS

4. Service Level C (Emergency) Condition There are no plant design basis events which result in Service Level C loads.

(1)(2)(3)

5. Service Level D (Faulted) Condition Normal operation (including dead weight), SSE, IRWST discharge and BLPB and other accident loads as provided in Tables 9 & 10 of Ref.B.1 and the faulted transients (Table 5, Figure 4, and Section 6.5.1.5 of Ref.B.1) shall be combined as defined below.

2 2 1/2 A. NOP + [SSE + (BLPB + IRWST) ] in conjunction with the faulted transients.

B. NOP + SSE in conjunction with the faulted transients.

6. Test Condition The test loading conditions are defined per Tables 5 and Figure 4 of Ref.B.1.

KEPCO & KHNP 49

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Note:

(1) Service Level D loads which include the combined effects of BLPB, SSE, IRWST discharge, faulted transients and normal operation shall be used in the design of the reactor coolant system pipe assemblies with the Service Level D service limit of ASME Section III, Appendix F of Ref.A.1 (2) The system or subsystem analysis performed to establish the loadings included in Service Level D loads is based upon elastic methods. Accordingly, elastic methods should be used in the design calculations performed to demonstrate the suitability of the reactor coolant system pipe assemblies to withstand the Level D service limit.

(3) Seismic, BLPB and IRWST discharge loads not provided by Table 9 & 10 of Ref.B.1 are defined by the loads which result from the response spectra of Figures 7,8 and 9 of Ref.B.1 (4) The following changes and additions to ASME Section III, NB-3650 are required for the elimination of OBE loads from the design basis. The equations referred below are those specified in ASME Section III, NB.

a) For primary stress evaluation in ASME Section III, NB-3654.2 earthquake loads are not required to be evaluated for consideration of Level B service Limits for Equation (9).

b) For satisfaction of primary plus secondary stress intensity range in ASME Section III, NB-3653.1, in Equation (1), Mi shall be either (1) the resultant range of all loads considering on-half the range of the safe-shutdown earthquake or (2) the resultant range of moment due to the full range of the safe-shutdown earthquake alone, whichever is greater. The use of the safe-shutdown earthquake is intended to provide a bounding design for the cumulative effects of earthquakes of a lesser magnitude and is therefore to be included in consideration of Level B Service Limits for Equation (10) c) For satisfaction of peak stress intensity in ASME Section III, NB-3653.2 the load sets developed in ASME Section III, NB-3653.1 shall be used in calculating the peak stress intensity, Sp, and the alternating stress intensity, Salt, for evaluating the fatigue effects and cumulative damage.

d) For simplified elastic-plastic discontinuity analysis in ASME Section III, NB-3653.6 if Equation (10) cannot be satisfied for all pairs of load sets, then the alternative analysis as described in ASME Section III, NB-3653.6 shall be followed. In addition, the following condition shall be satisfied:

Ssam = C2 Do (Mi + Mi ) / 2I < 6.0 Sm Where: Ssam is the nominal value of seismic anchor motion stress Mi is the same as Mi in Equation (12)

Mi is the same as Mi in Equation (10) except that it includes only moments due to seismic anchor motion displacements caused by a safe shutdown earthquake.

KEPCO & KHNP 50

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 The combined moment range (Mi + Mi ) shall be either (1) the resultant range of thermal expansion and thermal anchor movements plus on-half the range of the safe-shutdown earthquake anchor motion or (2) the resultant range of moment due to the full range of the safe-shutdown earthquake anchor motion alone, whichever is greater.

KEPCO & KHNP 51

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

8. Methodology 8.1 Thermal Analysis The thermal information is obtained using the computer program ANSYS (Ref.A.1) which is a large scale and general purpose computer program for solution of several types of engineering problems.

The ANSYS uses the wave front (or frontal) direct solution method for the system of simultaneous linear equations developed by the matrix displacement method. The ANSYS produces a nodal temperature distribution for given input lists including the nodal network descriptions, boundary conditions, and material properties. The post-processing procedure generates an equivalent linear gradient from the actual radial temperature distribution. The temperature differences along with nodes at each area of interest are output for selected transient times.

8.2 Structural Analysis The stresses in the components are produced by the internal pressure, mechanical load, thermal transient load, and dynamic load.

The pressure and thermal stresses are obtained using the ANSYS.

The stresses caused by the mechanical loads are calculated by the classical equations of beam theory for cuts in the nozzle wall and by the Bijlaard Method for cuts in the nozzle (or opening)-

vessel intersection. The most significant structural behavior in the nozzle (or opening)-vessel intersection is the variation of the shell membrane forces around the circumference of the nozzle. It is possible to represent this variation in terms of the membrane forces, or stresses, which have a secondary harmonic variation about the axis of the nozzle in addition to an axisymmetric component. These forces, or stresses, can then be applied to an axisymmetric finite element model which allows harmonically varying loads.

Primary stress is evaluated for Design, Service Level B, Service Level D, and Test Conditions.

Those stresses are obtained by superimposing the appropriate stress components from the pressure and mechanical loads specified for each condition, then calculating the principal stresses and stress intensities at each area to be investigated.

Primary plus secondary stress evaluation is performed for Service Level A, Service Level B, and Test Conditions. Those stresses are calculated by superimposing the appropriate stress components from the pressure, mechanical load, and thermal transient loads. The thermal stresses are calculated by the ANSYS. Temperature distributions from the thermal calculation are input to the structural model for the calculation of thermal stresses. The primary plus secondary stress intensity is calculated by the procedures of NB-3222, NB-3653 or AFPOST (Ref A.1 or Ref.E.2)

KEPCO & KHNP 52

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 8.3 Fatigue Analysis Total stresses are obtained by adding peak stresses to the primary plus secondary stresses. These peak stresses result from the effect of geometrical stress concentration at local structural discontinuities and from the non-linear potion of the radial (through wall) thermal gradients. Several methods are used to calculate fatigue strength reduction factors or stress concentration factors at geometrically discontinuous locations. The methods are selectively used according to the geometry of each component. The alternating stresses intensities are derived as per NB-3216 of Ref.A.1 and the cumulative fatigue usage factors are calculated by NB-3222.4 or NB-3653 of Ref.A.1.

KEPCO & KHNP 53

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

9. Computer Programs Used Table 9-1 provides the computer program used in the structural evaluation.

Table 9-1 Computer Program Description No. Program Version Ref. Description ANSYS is a general purpose finite element computer 1 ANSYS 12.1 E.1 program. The elements and options used in the analysis are well-established and fully verified.

AFPOST is 3-dimensional structural and fatigue 2 AFPOST 2 E.3 evaluation program in accordance with ASME Code,Section III.

NOZPROG calculates the stresses due to pressure 3 NOZPROG 1 E.4 and external load in a nozzle or nozzle-vessel intersection.

9.1 AFPOST AFPOST is a computer program for 3-dimensional structural and fatigue evaluation for pressure vessels in accordance with the requirements of the ASME Code,Section III.

The program combines thermal stresses resulting from ANSYS run with stresses from other sources of loads, calculates primary plus secondary stresses, total stresses and their ranges, and performs fatigue evaluation in accordance with the procedure as described in NB-3222.4.(e) of Ref.A.1. The program can be used to evaluate the simplified elastic-plastic analysis as stipulated in NB-3228.5 of Ref.A.1 for nozzle and shell structure.

This program reads the linearized stresses produced by prsect command of ANSYS, calculates the range of primary plus secondary stress intensity, and provides a table of primary plus secondary stresses, total stresses, and cumulative fatigue usage factors.

9.2 NOZPROG NOZPROG is a computer program which calculates stresses due to pressure and external load stresses in a nozzle or a nozzle-vessel intersection and calculates primary stresses and primary plus secondary stresses, except for thermal stresses. The load considered by the program are internal pressure, run pipe load, and external loads applied to the nozzle. The program formulates all possible combinations of the applied forces and moments (typically 64 load cases), considers each case, lists the results for the most severe case, and optionally prints all the considered sets of loads and stresses. At each cut, stresses are calculated using strength of materials formula.

Pressure stresses are calculated with equations for thin cylindrical shells. Nozzle load stresses outside the limits of reinforcement are calculated by beam stress equations for a beam with a hollow circular cross-section. Nozzle load stresses in a nozzle-vessel intersection are calculated by the Bijlaard Method.

KEPCO & KHNP 54

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

10. Structural Evaluation Results This section summarizes the results of the analyses 10.1 Primary Pipes and Elbows

a. Modeling and Areas of Interest TS Figure 10-1 Areas of Interest in Primary Pipes and Elbows KEPCO & KHNP 55

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-1 Structural Evaluation of Primary Pipes and Elbows TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Design NB-3652 Level D F-1430(b)

NB-3653.1 Service Level A and NB-3653.2-5 B

Thermal Ratchet Notes)

(1) See Figure 10-1 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable).

(3) Hot Leg Allowable limit is obtained at temperature of Design 650 °F, Level D and Service 615°F.

Cold Leg Allowable limit is obtained at temperature of Design 650 °F, Level D and Service 555°F.

(4) Allowable pressure is calculated in accordance with NB-3656(a)(1)

TS KEPCO & KHNP 56

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.2 Surge Line

a. Modeling and Areas of Interest TS Figure 10-2 Configuration of Surge Line KEPCO & KHNP 57

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-2 Design Evaluation of Surge Line TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio NB-3652 Design Eq.(9)

Table 10-3 Level D Evaluation of Surge Line TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio NB-3652 &

Level D NB-3656(b)

Eq.(9)

Table 10-4 Test Evaluation of Surge Line TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio NB-3657 &

Test NB-3226 Notes)

(1) See Figure 10-2 for the location.

(2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of Design 700 °F, Level D 653°F and Test 400 °F.

KEPCO & KHNP 58

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-5 Structural Evaluation of Surge Line TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio P+Q Range Homogeneous Flow P+Q Range Stratified Flow Service Level A & B Fatigue Homogeneous Flow Fatigue Stratified Flow Thermal Ratchet Notes)

(1) See Figure 10-2 for the location.

(2) Ratio = (Calculated Stress or CUF) / (Allowable).

(3) Allowable limit is obtained at operating temperature 653 °F (4) Since the range of primary plus secondary stress intensities exceeds the allowable of 3*Sm. It is alternatively justified in accordance with the simplified elastic-plastic analysis set forth in NB-3653.6 See Table 10-6 for the detailed evaluation.

(5) Since the value differs from the allowable limit by less than 10 percent, the contribution of each of the loading categories tis provided in Table 10-7 KEPCO & KHNP 59

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-6 Simplified Elastic-Plastic Evaluation of Surge Line TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio NB-3653.6 Eq(12)

Service Level A & B NB-3653.6 Eq(13)

Notes)

(1) See Figure 10-2 for the location.

(2) Ratio = (Calculated Stress or CUF) / (Allowable).

Table 10-7 Contribution of Each Loading of Surge Line TS Thermal Thermal Seismic Area of Interest Pressure Expansion Transient Total stress load load load KEPCO & KHNP 60

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.3 Surge Nozzle

a. Modeling and Areas of Interest TS Figure 10-3 Areas of Interest and Finite Element model in Surge Nozzle KEPCO & KHNP 61

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-8 Design Evaluation of Surge Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Notes)

(1) See Figure 10-3 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 62

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-9 Level D Evaluation of Surge Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Level D PL+Pb Notes)

(1) See Figure 10-3 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 615 °F KEPCO & KHNP 63

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-10 Test Evaluation of Surge Nozzle TS (1) (3)(4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Test Pm+Pb Notes)

(1) See Figure 10-3 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400 °F (4) The stress intensity compare with Pm allowable value for conservatism.

KEPCO & KHNP 64

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-11 Triaxial stress Evaluation of Surge Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Test Pm+Pb Notes)

(1) See Figure 10-3 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of Design 650°F and Test 400 °F KEPCO & KHNP 65

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-12 Structural Evaluation of Surge Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and P+Q Range B

KEPCO & KHNP 66

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-12 Structural Evaluation of Surge Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and Fatigue B

KEPCO & KHNP 67

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-12 Structural Evaluation of Surge Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Thermal Level A and Ratchet B

Notes)

(1) See Figure 10-3 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable).

(3) Allowable limit is obtained at temperature of 615°F (4) Since the value differs from the allowable limit by less than 10 percent, the contribution of each of the loading categories tis provided in Table 10-13 Table 10-13 Contribution of Each Loading of Surge Nozzle TS Area of Interest Pressure Thermal External load Total stress KEPCO & KHNP 68

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.4 Charging Inlet Nozzle

a. Modeling and Areas of Interest TS Figure 10-4 Areas of Interest and Finite Element model in Charging Inlet Nozzle KEPCO & KHNP 69

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-14 Design Evaluation of Charging Inlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Table 10-15 Level D Evaluation of Charging Inlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Level D PL+Pb Notes)

(1) See Figure 10-4 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of Design 650°F Level D 555°F KEPCO & KHNP 70

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-16 Test Evaluation of Charging Inlet Nozzle TS (1) (3)(4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Test Pm+Pb Notes)

(1) See Figure 10-4 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400°F (4) The stress intensity compare with Pm allowable value for conservatism.

KEPCO & KHNP 71

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-17 Triaxial stress Evaluation of Charging Inlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Test Pm+Pb Notes)

(1) See Figure 10-4 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of Design 650°F and Test 400°F KEPCO & KHNP 72

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-18 Structural Evaluation of Charging Inlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and P+Q Range B

KEPCO & KHNP 73

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-18 Structural Evaluation of Charging Inlet Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and Fatigue B

KEPCO & KHNP 74

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-18 Structural Evaluation of Charging Inlet Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Thermal Level A and Ratchet B

Notes)

(1) See Figure 10-4 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable).

(3) Allowable limit is obtained at temperature of 650°F (4) Since the total stress ranges of some load pairs contributing this CUF exceed 2*Sy, the requirements of NB-3227.6 are applied to adjust the Poisson`s ratio and fatigue usage factors.

KEPCO & KHNP 75

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.5 Drain Nozzle

a. Modeling and Areas of Interest TS Figure 10-5 Areas of Interest and Finite Element model in Drain Nozzle KEPCO & KHNP 76

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-19 Design Evaluation of Drain Nozzle TS (1) (4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio (3)

PL Design PL+Pb Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Category PL stress intensity compare with Pm allowable value for conservatism.

(4) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 77

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-20 Level D Evaluation of Drain Nozzle TS (1) (4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio (3)

PL Level D PL+Pb Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 650 °F (4) Category PL stress intensity compare with Pm allowable value for conservatism.

(5) Since the value differs from the allowable limit by less than 10 percent, the contribution of each of the loading categories tis provided in Table 10-21 Table 10-21 Contribution of Each Loading of Drain Nozzle TS Area of Interest Pressure Thermal External load Total stress KEPCO & KHNP 78

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-22 Test Evaluation of Drain Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Pm Test Pm+Pb Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400 °F KEPCO & KHNP 79

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-23 Triaxial stress Evaluation of Drain Nozzle TS (1) (4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Pm Design PL+Pb Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 80

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-23 Triaxial stress Evaluation of Drain Nozzle (Contd)

TS (1) (4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Pm Test PL+Pb Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400 °F KEPCO & KHNP 81

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-24 Structural Evaluation of Drain Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio P+Q Range Service Level A and B

Fatigue Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable).

(3) Allowable limit is obtained at temperature of 650 °F (4) Since the total stress ranges of some load pairs contributing this CUF exceed 2*Sy, the requirements of NB-3227.6 are applied to adjust the Poisson`s ratio and fatigue usage factors.

KEPCO & KHNP 82

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-24 Structural Evaluation of Drain Nozzle(Cont`d)

TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Thermal Level A and Ratchet B

Notes)

(1) See Figure 10-5 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable).

KEPCO & KHNP 83

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.6 Spray Nozzle

a. Modeling and Areas of Interest TS Figure 10-6 Areas of Interest and Finite Element model in Spray Nozzle KEPCO & KHNP 84

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-25 Design Evaluation of Spray Nozzle TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio (3)

PL Design PL+Pb Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Category PL stress intensity compare with Pm allowable value for conservatism.

(4) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 85

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-26 Level D Evaluation of Spray Nozzle TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio (3)

PL Level D PL+Pb Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Category PL stress intensity compare with Pm allowable value for conservatism.

(4) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 86

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-27 Test Evaluation of Spray Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Pm Test Pm+Pb Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400 °F KEPCO & KHNP 87

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-28 Triaxial stress Evaluation of Spray Nozzle TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio (3)

PL Design PL+Pb Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable)

(3) Category PL stress intensity compare with Pm allowable value for conservatism.

(4) Allowable limit is obtained at temperature of 650 °F KEPCO & KHNP 88

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-28 Triaxial stress Evaluation of Spray Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Pm Test Pm+Pb Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable)

(3) Allowable limit is obtained at temperature of 400 °F KEPCO & KHNP 89

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-29 Structural Evaluation of Spray Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio P+Q Range Service Level A and B

Fatigue Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable)

(3) Allowable limit is obtained at temperature of 650 °F (4) Since the total stress ranges of some load pairs contributing this CUF exceed 2*Sy, the requirements of NB-3227.6 are applied to adjust the Poisson`s ratio and fatigue usage factors.

KEPCO & KHNP 90

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-29 Structural Evaluation of Spray Nozzle(Cont`d)

TS (1) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Thermal Level A and Ratchet B

Notes)

(1) See Figure 10-6 for the location (2) Ratio = (Calculated Stress) / (Allowable)

KEPCO & KHNP 91

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 10.7 Shutdown Cooling System Outlet Nozzle

a. Modeling and Areas of Interest TS Figure 10-7 Areas of Interest and Finite Element model in SCO Nozzle KEPCO & KHNP 92

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

b. Structural Evaluation Results Table 10-30 Design Evaluation of Shutdown Cooling System Outlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Table 10-31 Level D Evaluation of Shutdown Cooling System Outlet Nozzle TS (3)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Level D PL+Pb Notes)

(1) See Figure 10-7 for the location (2) Ratio = (Calculated Stress) / (Allowable)

(3) Allowable limit is obtained at temperature of Design 650 °F and Level D 615°F KEPCO & KHNP 93

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-32 Test Evaluation of Shutdown Cooling System Outlet Nozzle TS (1) (3)(4) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Test Pm+Pb Notes)

(1) See Figure 10-7 for the location (2) Ratio = (Calculated Stress) / (Allowable).

(3) Allowable limit is obtained at temperature of 400°F (4) The stress intensity compare with Pm allowable value for conservatism.

KEPCO & KHNP 94

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-33 Triaxial stress Evaluation of Shutdown Cooling System Outlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio PL Design PL+Pb Test Pm+Pb Notes)

(1) See Figure 10-7 for the location (2) Ratio = (Calculated Stress) / (Allowable)

(3) Allowable limit is obtained at temperature of 400°F KEPCO & KHNP 95

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-34 Structural Evaluation of Shutdown Cooling System Outlet Nozzle TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and P+Q Range B

KEPCO & KHNP 96

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-34 Structural Evaluation of Shutdown Cooling System Outlet Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Level A and Fatigue B

KEPCO & KHNP 97

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Table 10-34 Structural Evaluation of Shutdown Cooling System Outlet Nozzle (Contd)

TS (1) (3) (2)

Condition Code Criteria Area of Interest Calculated Allowable Ratio Service Thermal Level A and Ratchet B

Notes)

(1) See Figure 10-7 for the location (2) Ratio = (Calculated Stress or CUF) / (Allowable)

(3) Allowable limit is obtained at temperature of 615°F KEPCO & KHNP 98

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

11. References A. Codes / Standards / Regulations

1. ASME Boiler and Pressure Vessel Code,Section III, Division 1, Rules for Construction of Nuclear Facility Components, The American Society of Mechanical Engineers, 2007 Edition with 2008 Addenda except the following requirements:

When applying Note(1) of Figure NB-3222.1 for Level B Service Limits, the calculation of Pb stresses must include reversing dynamic loads(including inertia earthquake effects) if evaluation of these loads is required by subparagraph NB-3223(b). For Class 1 piping, the material and D0 / t requirements of subparagraph NB-3656(b) shall be met for all Service Limits when the Service Limits include reversing dynamic loads, and the alternative rules for reversing dynamic loads are used

2. ASME Boiler and Pressure Vessel Code,Section II, Materials, The American Society of Mechanical Engineers, 2007 Edition with 2008 Addenda.

3. NUREG-0800, Standard Review Plan, Section 3.7.2, Seismic System Analysis, Rev.4, September 2013.

B. Specifications / Contract Documents

1. 11A60-ME-DS275-00, DPL-1, Rev.4, Design Specification for Reactor Coolant Pipe and Fittings for APR1400 DC, KEPCO E&C, June. 2015.

C. Textbooks

1. Formulas for Stress and Strain, Raymond J.Roark, Fourth Edition.

2. Designing by Photoelasticity, R.B. Heywood, Chapman and Hall, Ltd., 1952.

3. Stress Concentration Design Factors, R. E. Peterson, John Willey and Sons, Inc.,

1974.

4. Strength of Material, Parts I And II, S. Timoshenko, Third Edition, D.Van Nostrand Company, Inc.

5. Theory of Elasticity, S. Timoshenko and J. N. Goodier.

6. Design of Piping Systems, the M. W. Kellogg Company, John Wiley & Sons, Inc., New York, 2nd Edition, 1956.

7. Theory of Plates and Shells, S. Timoshenko and S. Woinowsky -Krieger, Mcgraw-Hill, 1940.

8. Theory of Thermal Stresses, B. A. Boley and J. H. Weiner, John Wiley & Sons, Inc.,

1960.

D. Papers

1. The Effect of Local Flexibilities on Stresses in a Structure, W.J.O'Donnell, WPAD-X(CE)-170, July 1961.

2. Local Stresses in Spherical and Cylindrical Shells due to External Loads, by K.R.Wichman, A.G. Hopper and J.L. Mershon, Welding Research Bulletin No. 107, July 1970.

3. "How To Determine Bending Strength in the Plastic Range", by Richard Gavalis, Machine Design, Dated July 2, 1964.

4. "Local Stresses in Cylindrical Shells due to External Loadings on Nozzles -

Supplement to WRC No.107 (Revision 1)," by J.L. Mershon, K.Mokhtarian, G.V.Ranjan and E.C.R. Dabaugh, Welding Research Bulletin No.297, September 1987.

KEPCO & KHNP 99

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 E. Computer Programs / Manuals

1. Computer Program, ANSYS, Version 12.1, Verification Document No. DAVM121, Rev.0, December 2010.

2. Computer Program, AFPOST, Version 2, Verification Document No. ND-G-CV-027, Rev.7, October 2014.

3. Computer Program, NOZPROG, Version 1, Verification Document No. ND-G-CV-006, Rev.10, October 2014.

F. Drawings

1. N11023-190CD-1102, Rev.1, Closure Piping.

2. N11023-190CD-2081, Rev.1, Hot Leg Nozzles.

3. N11023-190CD-2802, Rev.2, Cold Leg Nozzles.

4. N11023-190CD-4101, Rev.1, Cold Leg Piping P-5.

5. N11023-190CD-4102, Rev.1, Cold Leg Piping P-9.

6. N11023-190CD-4103, Rev.1, Cold Leg Piping P-14.

7. N11023-190CD-4104, Rev.1, Cold Leg Piping P-18.

8. N11023-190CD-5801, Rev.2, Surge Line

9. N11023-190CD-6201, Rev.1, Interfaces.

10. N11023-190CD-6202, Rev.1, Interfaces.

11. N11023-190CD-6203, Rev.1, Interfaces.

12. N11023-190CD-7101, Rev.1, Hot Leg Piping P-1.

13. N11023-190CD-7102, Rev.1, Hot Leg Piping P-10.

14. N11023-190CD-7201, Rev.1, Small Nozzles.

KEPCO & KHNP 100

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 Appendix A Simplified Elastic-Plastic Evaluation of Surge Line

1. Surge Line Pipe and Elbow The fatigue usage factor at Surge Line Pipe is calculated as below with equation (11) and (14) and the fatigue curves given in figure I-9.2.1 & I-9.2.2 (curves B and C as appropriate) of Ref.A TS KEPCO & KHNP A-1

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2 TS KEPCO & KHNP A-2

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

2. Surge Line RTD Nozzle TS KEPCO & KHNP A-3

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

3. Surge Line RTD Nozzle - Weld TS KEPCO & KHNP A-4

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

4. Surge Line Sampling Nozzle TS KEPCO & KHNP A-5

Non-Proprietary Summary Stress Report for Primary Piping APR1400-H-N-NR-14005-NP Rev.2

5. Surge Line Sampling Nozzle - Weld TS KEPCO & KHNP A-6