ML18178A215

Enclosure 17 - APR1400-E-B-NR-16001-NP, Rev. 0, Evaluation of Main Steam and Feedwater Piping Applied to the Graded Approach for the APR1400

ML18178A215
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Site:	05200046
Issue date:	07/31/2017
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-E-B-NR-16001-NP, Rev 0
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Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 Revision 0 Non-Proprietary July 2017 Copyright 2017 Korea Electric Power Corporation &

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

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 REVISION HISTORY Revision Date Page Description July 0 All Standard Issue 2017 This document was prepared for the design certification application to the U.S. Nuclear Regulatory Commission and contains technological information that constitutes intellectual 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 KEPCO & KHNP i

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 ABSTRACT This report is in response to the Question No. 03.12-2 in RAI No. 35-7955, and provides summary information on the piping analysis approach and results as well as methodology of the piping analysis, necessary to support safety determination of the Main Steam (MS) and Feedwater (FW) piping systems. To demonstrate that the subject piping, which has been structurally evaluated based on the graded approach described in DCD Tier 2, Section 14.3.2.3, conforms to the requirements of ASME B&PV Code,Section III, mandated by 10CFR50.55a, the following information is provided:

A tabulated, quantitative summary of the calculated maximum stresses and fatigue usage factors (if applicable) with a comparison to ASME B&PV Code allowable for each Code equation.

For equipment nozzles, a tabulated quantitative summary of the calculated reaction loads compared to the specific nozzle allowable values.

For containment penetrations, quantitative maximum calculated results compared to the allowable values.

Based on the review of summary information and component design drawings provided in this report, it is concluded that the APR1400 Main Steam and Feedwater piping that are included in the scope of Class 2 piping system design based on the graded approach, demonstrates the conformance to the requirements of ASME B&PV Code,Section III.

KEPCO & KHNP ii

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TABLE OF CONTENTS

1.0 INTRODUCTION

.................................................................................................. 1 1.1 Graded Approach............................................................................................................................ 1 1.2 Scope of Report .............................................................................................................................. 1 1.3 Piping Subsystem Description ........................................................................................................ 2 1.3.1 MS101 ............................................................................................................................................ 2 1.3.2 MS102 ............................................................................................................................................ 2 1.3.3 MS103 ............................................................................................................................................ 3 1.3.4 MS104 ............................................................................................................................................ 3 1.3.5 FW101 ............................................................................................................................................ 4 1.3.6 FW102 ............................................................................................................................................ 4 1.3.7 MS271 ............................................................................................................................................ 5 1.3.8 MS272 ............................................................................................................................................ 5 1.3.9 FW209 ............................................................................................................................................ 6 1.3.10 FW219 ............................................................................................................................................ 6 2.0

SUMMARY

OF RESULTS AND CONCLUSIONS .................................................... 7 2.1 Conclusions .................................................................................................................................... 7 2.2 MS101 ............................................................................................................................................ 7 2.3 MS102 ............................................................................................................................................ 8 2.4 MS103 ............................................................................................................................................ 8 2.5 MS104 ............................................................................................................................................ 9 2.6 FW101 ............................................................................................................................................ 9 2.7 FW102 .......................................................................................................................................... 10 2.8 MS271 .......................................................................................................................................... 10 2.9 MS272 .......................................................................................................................................... 11 2.10 FW209 .......................................................................................................................................... 11 KEPCO & KHNP iii

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.11 FW219 .......................................................................................................................................... 12 3.0 NOMENCALTURE .............................................................................................. 13 4.0 ASSUMPTIONS AND OPEN ITEMS .................................................................... 14 4.1 Assumptions ................................................................................................................................. 14 4.2 Open Items ................................................................................................................................... 14 5.0 ACCEPTANCE CRITERIA ................................................................................... 15 5.1 Design Basis for Thermal and Mechanical Loading ..................................................................... 15 5.2 Functional Capability Criteria ........................................................................................................ 15 5.3 High Energy Line Pipe Break Postulation Criteria ........................................................................ 16 6.0 LOADS AND LOAD COMBINATIONS .................................................................. 17 6.1 Design Basis for Thermal and Mechanical Loading ..................................................................... 17 6.1.1 Thermal Loading (TRNG) ............................................................................................................. 17 6.1.2 Normal Operation Weight Loading (WGHT) ................................................................................. 17 6.1.3 IRWST Hydro Dynamics Inertia Loading (IRWST) ....................................................................... 17 6.1.4 Safe Shutdown Earthquake Inertia Loading (SSE) ...................................................................... 17 6.1.5 RCS Branch Line Pipe Break Loading (BLPB) ............................................................................. 17 6.1.6 Safe Shutdown Earthquake Building Displacement Loading (SSBD) .......................................... 17 6.1.7 Safe Shutdown Earthquake RCS Header Displacement Loading (SSHD) .................................. 17 6.1.8 Feedwater Pump Trip Loading (FWPT) ........................................................................................ 18 6.1.9 Turbine Main Stop Valve Closure Loading (TSVC) ...................................................................... 18 6.1.10 Postulated Line Break in FW System (FWLB) ............................................................................. 18 6.1.11 Postulated Line Break in FW System (MSLB) .............................................................................. 18 6.1.12 Safety Relief Valve Transient Loading(SRV) ................................................................................ 18 6.1.13 Atmospheric Dump Valve Transient Loading(ADV) ...................................................................... 18 6.1.14 Aux Feedwater Pump Turbine Driven Line Break in MS System (AFPTLB) ................................ 18 6.1.15 Drip Leg Line Break in MS System (DRLB) ................................................................................. 18 6.1.16 Coincident Pressure Loadings ...................................................................................................... 18 KEPCO & KHNP iv

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 6.2 Loading Combination .................................................................................................................... 19 6.2.1 Main Steam piping inside the containment building ..................................................................... 19 6.2.2 Main Feedwater piping inside the containment building ............................................................... 19 6.2.3 Main Steam piping inside the Auxiliary building ............................................................................ 20 6.2.4 Main Steam piping inside the Auxiliary building ............................................................................ 20 6.2.5 Main Feedwater piping inside the Auxiliary building ..................................................................... 21 6.2.6 Main Feedwater piping inside the Auxiliary building ..................................................................... 21 7.0 ANANYSIS RESULT ........................................................................................... 22 7.1 MS101 .......................................................................................................................................... 22 7.1.1 Subsystem Plot ............................................................................................................................. 22 7.1.2 Pipe Data Sheet ............................................................................................................................ 23 7.1.3 Piping Stress Evaluation Results .................................................................................................. 24 7.2 MS102 .......................................................................................................................................... 28 7.2.1 Subsystem Plot ............................................................................................................................. 28 7.2.2 Pipe Data Sheet ............................................................................................................................ 29 7.2.3 Piping Stress Evaluation Results .................................................................................................. 30 7.3 MS103 .......................................................................................................................................... 34 7.3.1 Subsystem Plot ............................................................................................................................. 34 7.3.2 Pipe Data Sheet ............................................................................................................................ 35 7.3.3 Piping Stress Evaluation Results .................................................................................................. 36 7.4 MS104 .......................................................................................................................................... 40 7.4.1 Subsystem Plot ............................................................................................................................. 40 7.4.2 Pipe Data Sheet ............................................................................................................................ 41 7.4.3 Piping Stress Evaluation Results .................................................................................................. 42 7.5 FW101 .......................................................................................................................................... 46 7.5.1 Subsystem Plot ............................................................................................................................. 46 7.5.2 Pipe Data Sheet ............................................................................................................................ 47 KEPCO & KHNP v

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5.3 Piping Stress Evaluation Results .................................................................................................. 48 7.6 FW102 .......................................................................................................................................... 56 7.6.1 Subsystem Plot ............................................................................................................................. 56 7.6.2 Pipe Data Sheet ............................................................................................................................ 57 7.6.3 Piping Stress Evaluation Results .................................................................................................. 58 7.7 MS271 .......................................................................................................................................... 66 7.7.1 Subsystem Plot ............................................................................................................................. 66 7.7.2 Pipe Data Sheet ............................................................................................................................ 67 7.7.3 Piping Stress Evaluation Results .................................................................................................. 68 7.8 MS272 .......................................................................................................................................... 89 7.8.1 Subsystem Plot ............................................................................................................................. 89 7.8.2 Pipe Data Sheet ............................................................................................................................ 90 7.8.3 Piping Stress Evaluation Results .................................................................................................. 91 7.9 FW209 ........................................................................................................................................ 112 7.9.1 Subsystem Plot ........................................................................................................................... 112 7.9.2 Pipe Data Sheet .......................................................................................................................... 113 7.9.3 Piping Stress Evaluation Results ................................................................................................ 113 7.10 FW219 ........................................................................................................................................ 121 7.10.1 Subsystem Plot ........................................................................................................................... 121 7.10.2 Pipe Data Sheet .......................................................................................................................... 122 7.10.3 Piping Stress Evaluation Results ................................................................................................ 122 8.0 COMPUTER CODE ........................................................................................... 132 8.1 PIPESTRESS 3.9.0 .................................................................................................................... 132 9.0 REFERENCE .................................................................................................... 133 KEPCO & KHNP vi

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 LIST OF TABLES Table 2.2-1 Location of Highest Stress in MS101 .................................................................................. 7 Table 2.3-1 Location of Highest Stress in MS102 .................................................................................. 8 Table 2.4-1 Location of Highest Stress in MS103 .................................................................................. 8 Table 2.5-1 Location of Highest Stress in MS104 .................................................................................. 9 Table 2.6-1 Location of Highest Stress in FW101.................................................................................. 9 Table 2.7-1 Location of Highest Stress in FW102................................................................................ 10 Table 2.8-1 Location of Highest Stress in MS271 ................................................................................ 10 Table 2.9-1 Location of Highest Stress in MS272 ................................................................................ 11 Table 2.10-1 Location of Highest Stress in FW209................................................................................ 11 Table 2.11-1 Location of Highest Stress in FW219................................................................................ 12 Table 5.1-1 Code Allowable ................................................................................................................. 15 Table 5.3-1 Pipe Break Location .......................................................................................................... 16 Table 6.1-1 Pressure ............................................................................................................................ 19 Table 6.2-1 MS101, MS102, MS103, MS104 Load Combination ........................................................ 19 Table 6.2-2 FW101, FW102 Load Combination................................................................................... 19 Table 6.2-3 MS271 Load Combination ................................................................................................ 20 Table 6.2-4 MS272 Load Combination ................................................................................................ 20 Table 6.2-5 FW209 Load Combination ................................................................................................ 21 Table 6.2-6 FW219 Load Combination ................................................................................................ 21 Table 7.1-1 Criteria Check at Main Steam Outlet Nozzle in MS101 .................................................... 24 Table 7.1-2 Load Check at Main Steam Outlet Nozzle in MS101........................................................ 25 Table 7.1-3 The Stress at the Flued Head Penetration Anchor in MS101 ........................................... 26 Table 7.1-4 The Stress at the Pipe Support Location in MS101 .......................................................... 27 Table 7.2-1 Criteria Check at Main Steam Outlet Nozzle in MS102 .................................................... 30 Table 7.2-2 Load Check at Main Steam Outlet Nozzle in MS102........................................................ 31 Table 7.2-3 The Stress at the Flued Head Penetration Anchor in MS102 ........................................... 32 KEPCO & KHNP vii

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.2-4 The Stress at the Pipe Support Location in MS102 .......................................................... 33 Table 7.3-1 Criteria Check at Main Steam Outlet Nozzle in MS103 .................................................... 36 Table 7.3-2 Load Check at Main Steam Outlet Nozzle in MS103........................................................ 37 Table 7.3-3 The Stress at the Flued Head Penetration Anchor in MS103 ........................................... 38 Table 7.3-4 The Stress at the Pipe Support Location in MS103 .......................................................... 39 Table 7.4-1 Criteria Check at Main Steam Outlet Nozzle in MS104 .................................................... 42 Table 7.4-2 Load Check at Main Steam Outlet Nozzle in MS104........................................................ 43 Table 7.4-3 The Stress at the Flued Head Penetration Anchor in MS104 ........................................... 44 Table 7.4-4 The Stress at the Pipe Support Location in MS104 .......................................................... 45 Table 7.5-1 Criteria Check at Main Feedwater Economizer Nozzle in FW101 .................................... 48 Table 7.5-2 The Stress at the Flued Head Penetration Anchor in FW101 .......................................... 49 Table 7.5-3 The Stress at Branch Pipe Connection in FW101 ............................................................ 49 Table 7.5-4 The Stress at Pipe Support Location in FW101................................................................ 50 Table 7.5-5 The Stress at the Valve Location in FW101 ..................................................................... 54 Table 7.6-1 Criteria Check at Main Feedwater Economizer Nozzle in FW102 .................................... 58 Table 7.6-2 The Stress at the Flued Head Penetration Anchor in FW102 .......................................... 59 Table 7.6-3 The Stress at Branch Pipe Connection in FW102 ............................................................ 59 Table 7.6-4 The Stress at Pipe Support Location in FW102................................................................ 60 Table 7.6-5 The Stress at the Valve Location in FW102 ..................................................................... 64 Table 7.7-1 The Stress at Flued Head Penetration Anchor in MS271 ................................................. 68 Table 7.7-2 Load Input for Penetration Assembly ................................................................................ 70 Table 7.7-3 Allowable Load Check for Penetration Assembly ............................................................. 71 Table 7.7-4 The Stress at Branch Pipe Connection in MS271 ............................................................ 73 Table 7.7-5 The Stress at Pipe Support Location in MS271 ................................................................ 77 Table 7.7-6 The Stress at Valve Location in MS271 ............................................................................ 80 Table 7.7-7 The Stress at Flanged Connection in MS271 ................................................................... 85 Table 7.8-1 The Stress at Flued Head Penetration Anchor in MS272 ................................................. 91 KEPCO & KHNP viii

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.8-2 Load Input for Penetration Assembly ................................................................................ 93 Table 7.8-3 Allowable Load Check for Penetration Assembly ............................................................. 94 Table 7.8-4 The Stress at Branch Pipe Connection in MS272 ............................................................ 96 Table 7.8-5 The Stress at Pipe Support Location in MS272 .............................................................. 100 Table 7.8-6 The Stress at Valve Location in MS272 .......................................................................... 104 Table 7.8-7 The Stress at Flanged Connection in MS272 ................................................................. 108 Table 7.9-1 The Stress at Flued Head Penetration Anchor in FW209............................................... 114 Table 7.9-2 Load Input for Penetration Assembly .............................................................................. 115 Table 7.9-3 Allowable Load Check for Penetration Assembly ........................................................... 116 Table 7.9-4 The Stress at the Pipe Support Location in FW209........................................................ 118 Table 7.9-5 The Stress at Valve Location in FW209.......................................................................... 119 Table 7.10-1 The Stress at Flued Head Penetration Anchor in FW219............................................... 123 Table 7.10-2 Load Input for Penetration Assembly .............................................................................. 124 Table 7.10-3 Allowable Load Check for Penetration Assembly ........................................................... 125 Table 7.10-4 The Stress at Pipe Support Location in FW219.............................................................. 127 Table 7.10-5 The Stress at Valve Location in FW219.......................................................................... 130 KEPCO & KHNP ix

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 LIST OF FIGURES Figure 1.3-1 Subsystem MS101 Boundary ............................................................................................. 2 Figure 1.3-2 Subsystem MS102 Boundary ............................................................................................. 2 Figure 1.3-3 Subsystem MS103 Boundary ............................................................................................. 3 Figure 1.3-4 Subsystem MS104 Boundary ............................................................................................. 3 Figure 1.3-5 Subsystem FW101 Boundary ............................................................................................. 4 Figure 1.3-6 Subsystem FW102 Boundary ............................................................................................. 4 Figure 1.3-7 Subsystem MS271 Boundary ............................................................................................. 5 Figure 1.3-8 Subsystem MS272 Boundary ............................................................................................. 5 Figure 1.3-9 Subsystem FW209 Boundary ............................................................................................. 6 Figure 1.3-10 Subsystem FW219 Boundary ............................................................................................. 6 Figure 7.1-1 Subsystem MS101 Plot ..................................................................................................... 22 Figure 7.1-2 Subsystem MS101 Pipe Data Sheet................................................................................. 23 Figure 7.2-1 Subsystem MS102 Plot ..................................................................................................... 28 Figure 7.2-2 Subsystem MS102 Pipe Data Sheet................................................................................. 29 Figure 7.3-1 Subsystem MS103 Plot ..................................................................................................... 34 Figure 7.3-2 Subsystem MS103 Pipe Data Sheet................................................................................. 35 Figure 7.4-1 Subsystem MS104 Plot ..................................................................................................... 40 Figure 7.4-2 Subsystem MS104 Pipe Data Sheet................................................................................. 41 Figure 7.5-1 Subsystem FW101 Plot .................................................................................................... 46 Figure 7.5-2 Subsystem FW101 Pipe Data Sheet ................................................................................ 47 Figure 7.6-1 Subsystem FW102 Plot .................................................................................................... 56 Figure 7.6-2 Subsystem FW102 Pipe Data Sheet ................................................................................ 57 Figure 7.7-1 Subsystem MS271 Plot ..................................................................................................... 66 Figure 7.7-2 Subsystem MS271 Pipe Data Sheet................................................................................. 67 Figure 7.7-3 Penetration Assembly Model - MS System ...................................................................... 72 Figure 7.8-1 Subsystem MS272 Plot ..................................................................................................... 89 KEPCO & KHNP x

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Figure 7.8-2 Subsystem MS272 Pipe Data Sheet................................................................................. 90 Figure 7.8-3 Penetration Assembly Model - MS System ...................................................................... 95 Figure 7.9-1 Subsystem FW209 Plot .................................................................................................. 112 Figure 7.9-2 Subsystem FW209 Pipe Data Sheet .............................................................................. 113 Figure 7.9-3 Penetration Assembly Model - FW System ................................................................... 117 Figure 7.10-1 Subsystem FW219 Plot .................................................................................................. 121 Figure 7.10-2 Subsystem FW219 Pipe Data Sheet .............................................................................. 122 Figure 7.10-3 Penetration Assembly Model - FW System ................................................................... 126 KEPCO & KHNP xi

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 KEPCO & KHNP xii

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0

1.0 INTRODUCTION

1.1 Graded Approach Design of Class 1, 2 and 3 piping and components contained in the piping subsystems shall comply with the requirements of ASME Section III (Reference 9.1), subsections NB, NC and ND, respectively, for the conditions described in Section 5.0 of this report. In determination of the scope of piping system and component design for APR1400 DC, the concept of graded approach consistent with SECY-90-377 is taken as documented in DCD Tier 2, Subsection 14.3.2.3.

Piping subsystems analyzed for design certification are selected based on the safety significance. The scope of design for ASME code Class 2 piping includes MS and main FW piping located inside the containment building. MS and main FW piping is the largest ASME Class 2 piping connected to the steam generators and has the highest structural load. The scope of design for MS and main FW piping outside the containment building covers piping (1 Division) from the containment penetration anchors to MSVH (Main Steam Valve House) penetration anchors beyond isolation valves which are located in the break exclusion area in auxiliary building. This report summarizes the stress analyses results for Class 2 piping based on the graded approach.

1.2 Scope of Report The scope of this report consists of the documentation of Code (NC-3650) compliance of the Class 2 piping components identified on the analytical drawings for the ten representative piping subsystems, namely, MS101 thru MS104, FW101, FW102, MS271, MS272, FW209 and FW219, for which boundaries are described in Figure 1.3-1, 1.3-2, 1.3-3, 1.3-4, 1.3-5, 1.3-6, 1.3-7, 1.3-8, 1.3-9 and 1.3-10, respectively.

KEPCO & KHNP 1

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 1.3 Piping Subsystem Description 1.3.1 MS101 The subject piping subsystem is routed from SG 2 steam outlet nozzle to containment shell penetration.

TS Figure 1.3-1 Subsystem MS101 Boundary 1.3.2 MS102 The subject piping subsystem is routed from SG 2 steam outlet nozzle to containment shell penetration.

TS Figure 1.3-2 Subsystem MS102 Boundary KEPCO & KHNP 2

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 1.3.3 MS103 :

The subject piping subsystem is routed from SG 1 steam outlet nozzle to containment shell penetration.

TS Figure 1.3-3 Subsystem MS103 Boundary 1.3.4 MS104 :

The subject piping subsystem is routed from SG 1 steam outlet nozzle to containment shell penetration.

TS Figure 1.3-4 Subsystem MS104 Boundary KEPCO & KHNP 3

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 1.3.5 FW101 :

The subject piping subsystem is routed from SG 1 economizer nozzle to containment shell penetration.

TS Figure 1.3-5 Subsystem FW101 Boundary 1.3.6 FW102 :

The subject piping subsystem is routed from SG 2 economizer nozzle to containment shell penetration. TS Figure 1.3-6 Subsystem FW102 Boundary KEPCO & KHNP 4

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 1.3.7 MS271 The subject piping subsystem is routed from containment penetration anchor to MSVH(Main Steam Valve House) penetration anchors. TS Figure 1.3-7 Subsystem MS271 Boundary 1.3.8 MS272 :

The subject piping subsystem is routed from containment penetration anchor to MSVH(Main Steam Valve House) penetration anchors. TS Figure 1.3-8 Subsystem MS272 Boundary KEPCO & KHNP 5

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 1.3.9 FW209 The subject piping subsystem is routed from containment penetration anchor to MSVH(Main Steam Valve House) penetration anchors. TS Figure 1.3-9 Subsystem FW209 Boundary 1.3.10 FW219 The subject piping subsystem is routed from containment penetration anchor to MSVH(Main Steam Valve House) penetration anchors. TS Figure 1.3-10 Subsystem FW219 Boundary KEPCO & KHNP 6

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.0

SUMMARY

OF RESULTS AND CONCLUSIONS 2.1 Conclusions The class 2 piping systems which are applied to the grade approach were designed to the requirements of the ASME Boiler and Pressure Vessel Code,Section III, 2007 Edition with 2008 Addenda in accordance with the requirements of NC-3600, Service Loadings, Operating Conditions and Test Conditions as specified in the Design Specification.

From the results summarized in this report, it is concluded that the class 2 piping systems of MS101, MS102, MS103, MS104, FW101, FW102, MS271, MS272, FW209 and FW219 satisfy all of the requirements of the Design Specification (Reference 9.5).

2.2 MS101 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.2-1 Location of Highest Stress in MS101 TS KEPCO & KHNP 7

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.3 MS102 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.3-1 TS Location of Highest Stress in MS102 2.4 MS103 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.4-1 Location of Highest Stress in MS103 TS KEPCO & KHNP 8

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.5 MS104 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.5-1 Location of Highest Stress in MS104 TS 2.6 FW101 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.6-1 Location of Highest Stress in FW101 TS KEPCO & KHNP 9

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.7 FW102 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.7-1 Location of Highest Stress in FW102 TS 2.8 MS271 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.8-1 Location of Highest Stress in MS271 TS KEPCO & KHNP 10

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.9 MS272 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.9-1 Location of Highest Stress in MS272 TS 2.10 FW209 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.10-1 Location of Highest Stress in FW209 TS KEPCO & KHNP 11

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 2.11 FW219 All pipe stresses meet applicable Code allowables.

The highest stress for each Code equation is tabulated below.

Table 2.11-1 Location of Highest Stress in FW219 TS KEPCO & KHNP 12

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 3.0 NOMENCALTURE SG Steam Generator MS Main steam FW Main FeedWater Sc Basic material allowable stress value at room temperature Sh Basic material allowable stress value at normal service temperature Sy Yield strength Sa Allowable stress range for expansion stresses KEPCO & KHNP 13

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 4.0 ASSUMPTIONS AND OPEN ITEMS 4.1 Assumptions The vendor information in this report is assumed based on the reference plant.

4.2 Open Items The small bore branch piping of the main line is not included in this analysis based on the decoupling criteria, which is not designed in DC design stage. The small bore piping should be evaluated after the design is accomplished.

KEPCO & KHNP 14

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 5.0 ACCEPTANCE CRITERIA 5.1 Design Basis for Thermal and Mechanical Loading The thermal and mechanical loading evaluations of all piping products, used in the design of these subsystems, are performed in accordance with the design rules specified in Paragraphs NC-3652, NC-3653, and NC-3655 for Class 2 piping. The design basis and acceptance criteria listed in Tables 5.1-1 of this report are used as a basis for the calculations.

Table 5.1-1 Code Allowable Source of Allowable Stress Condition Criterion NC-3652 1.5 Sh Design Lesser of 1.8 Sh and 1.5 Sy (for Occasional Loads)

SA = f(1.25 Sc + 0.25 Sh)

NC-3653 (for Thermal Expansion) Service Level A/B Sh + SA (for Sustained Loads including Thermal Expansion)

NC-3655 Lesser of 3.0 Sh and 2.0 Sy Service Level D NC-3655(b)(4) 6.0 Sh Service Level D 5.2 Functional Capability Criteria These piping subsystems (or a portion of this piping subsystem) are designated as Required for Safe Shutdown per Section 902 of the system PSDS(Reference 9.5). The requirements for assurance of functional capability are provided in Section 902 of the general PSDS(Reference 9.5).

a. Piping functional capability is assured by verifying that the maximum stress in Eq.(9) of ASME B&PV Code,Section III NC-3650, regardless of service level, does not exceed Service C limits.

b. Based on NUREG-1367, functional capability of a piping system is assured by meeting the present code(ASME B&PV Code,Section III NC/ND-3650) Eq.(9),

Level D, stress limit of 2Sy, provided that:

• Dynamic loads are reversing. This includes loads due to earthquake and pressure wave loads(not slug-flow fluid hammer).

• Dynamic moments are calculated using an elastic response spectrum analysis with +/-15% peak broadening and not more than 5% damping.

KEPCO & KHNP 15

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0

• Steady-state(e.g., weight) stresses including non-reversing dynamic loads do not exceed 0.25 Sy.

• Do/t(pipe outer diameter divided by thickness) does not exceed 50.

• External pressure does not exceed internal pressure.

5.3 High Energy Line Pipe Break Postulation Criteria The portions of the subsystem designated as High Energy Lines requiring break postulation per Reference 9.7 are designed using the acceptance criteria specified below.

Table 5.3-1 Pipe Break Location Source of Requirement Acceptance Criteria Reference 9.7 ASME NC, Eq.( 9)+ Eq.( 10) 0.8(1.8Sh+SA)

Note : See applicable Code paragraphs for nomenclature.

KEPCO & KHNP 16

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 6.0 LOADS AND LOAD COMBINATIONS 6.1 Design Basis for Thermal and Mechanical Loading 6.1.1 Thermal Loading (TRNG) 6.1.1.1 Thermal Expansion Modes This piping subsystem contains ASME Code,Section III, piping and the applicable design basis thermal expansion modes are defined in the System (Reference 9.5). The thermal expansion modes are interpreted using the rules specified in the General PSDS (Reference 9.5).

6.1.1.2 Equipment Nozzle Movement (RCS Nozzle Movement)

RCS Nozzle Movements induced by thermal loading are used in stress analysis.

6.1.2 Normal Operation Weight Loading (WGHT)

Normal Operation Weight Loading is that loading due to the weight of the pipe metal, insulation and its contents during the subsystem normal operating service conditions, all valves and in-line equipment, and any significant support or restraint hardware that is directly supported by the pipe.

6.1.3 IRWST Hydro Dynamics Inertia Loading (IRWST)

IRWST Hydro Dynamics Inertia Loading is the inertia portion of the total loading induced by POSRV operation. The inertia loading is the result of excitation amplified by building response motion.

6.1.4 Safe Shutdown Earthquake Inertia Loading (SSE)

Safe Shutdown Earthquake Inertia Loading is the inertia portion of the total loading induced by Safe Shutdown Earthquake excitation amplified by building response motion.

6.1.5 RCS Branch Line Pipe Break Loading (BLPB)

Branch Line Pipe Break Loading is the total loading that is induced by the vibration of unbroken RCS branch line. The subject vibration is the result of excitations of reactor vessel, hot and cold legs, pressurizer and steam generator caused by a RCS branch line pipe break.

6.1.6 Safe Shutdown Earthquake Building Displacement Loading (SSBD)

Safe Shutdown Earthquake Building Displacement load analysis is performed and the maximum building displacements of the building structure are included the seismic analysis report for the applicable building.

6.1.7 Safe Shutdown Earthquake RCS Header Displacement Loading (SSHD)

KEPCO & KHNP 17

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Safe Shutdown Earthquake RCS Header Displacement load analysis is performed and the maximum header displacements of the RCS are included in the report of interface requirements for RCS branch piping for the applicable RCS header.

6.1.8 Feedwater Pump Trip Loading (FWPT)

Feedwater Pump Trip Loading is the total loading that is induced by Water hammer due to Feedwater Pump Trip.

6.1.9 Turbine Main Stop Valve Closure Loading (TSVC)

Turbine Main Stop Valve Closure Loading is the total loading that is induced by Steam hammer due to Valve fast closure.

6.1.10 Postulated Line Break in FW System (FWLB)

Postulated Line Break Loading in FW System is the total loading that is induced by Line Break in FW System.

6.1.11 Postulated Line Break in FW System (MSLB)

Postulated Line Break Loading in MS System is the total loading that is induced by Line Break in MS System.

6.1.12 Safety Relief Valve Transient Loading(SRV)

Safety Relief Valve Transient Loading is the total loading that is induced by safety relief valve actuation.

6.1.13 Atmospheric Dump Valve Transient Loading(ADV)

Atmospheric Dump Valve Transient Loading is the total loading that is induced by dump valve actuation.

6.1.14 Aux Feedwater Pump Turbine Driven Line Break in MS System (AFPTLB)

Postulated Line Break Loading in MS System is the total loading that is induced by Line Break in MS System.

6.1.15 Drip Leg Line Break in MS System (DRLB)

Postulated Line Break Loading in MS System is the total loading that is induced by Line Break in MS System.

6.1.16 Coincident Pressure Loadings Two coincident internal pressure loading cases are used for primary load design. Two cases are listed below. Specific descriptions concerning the combination of these pressure loading KEPCO & KHNP 18

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 conditions with the individual primary loadings identified are contained in Section 6.2.

Table 6.1-1 Pressure Load Abbreviation Description DPRE Individual component design pressure per Reference 9.5 Individual component peak pressure coincident with service level PPRS being considered per Reference 9.5 6.2 Loading Combination The combined loadings described in Table 6.2-1, 6.2-2, 6.2-3, 6.2-4, 6.2-5 and 6.2-6 are used as a design basis for all NC-3650. These conditions address all requirements specified in Reference 9.5.

6.2.1 Main Steam piping inside the containment building Table 6.2-1 MS101, MS102, MS103, MS104 Load Combination TS 6.2.2 Main Feedwater piping inside the containment building Table 6.2-2 FW101, FW102 Load Combination TS KEPCO & KHNP 19

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 6.2.3 Main Steam piping inside the Auxiliary building Table 6.2-3 MS271 Load Combination TS 6.2.4 Main Steam piping inside the Auxiliary building Table 6.2-4 MS272 Load Combination TS KEPCO & KHNP 20

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 6.2.5 Main Feedwater piping inside the Auxiliary building Table 6.2-5 FW209 Load Combination TS 6.2.6 Main Feedwater piping inside the Auxiliary building Table 6.2-6 FW219 Load Combination TS KEPCO & KHNP 21

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.0 ANANYSIS RESULT 7.1 MS101 7.1.1 Subsystem Plot TS Figure 7.1-1 Subsystem MS101 Plot KEPCO & KHNP 22

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.1.2 Pipe Data Sheet TS Figure 7.1-2 Subsystem MS101 Pipe Data Sheet KEPCO & KHNP 23

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.1.3 Piping Stress Evaluation Results 7.1.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the main steam outlet nozzle against maximum nozzle load criteria.

7.1.3.1.1 Criteria Check Table 7.1-1 Criteria Check at Main Steam Outlet Nozzle in MS101 TS KEPCO & KHNP 24

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.1.3.1.2 Loads Check Table 7.1-2 Load Check at Main Steam Outlet Nozzle in MS101 TS 7.1.3.1.3 Conclusion Base on the above evaluation, it can be concluded that loads applying on SG steam outlet nozzle safe end are within the allowable, and therefore acceptable.

KEPCO & KHNP 25

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.1.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.1-3 The Stress at the Flued Head Penetration Anchor in MS101 TS 7.1.3.3 Branch Pipe Connection There is no Branch Pipe Connection in this piping subsystem.

KEPCO & KHNP 26

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.1.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.1-4 The Stress at the Pipe Support Location in MS101 TS 7.1.3.5 Valve There is no valve in this piping subsystem.

7.1.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 27

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2 MS102 7.2.1 Subsystem Plot TS Figure 7.2-1 Subsystem MS102 Plot KEPCO & KHNP 28

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2.2 Pipe Data Sheet TS Figure 7.2-2 Subsystem MS102 Pipe Data Sheet KEPCO & KHNP 29

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2.3 Piping Stress Evaluation Results 7.2.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the main steam outlet nozzle against maximum nozzle load criteria.

7.2.3.1.1 Criteria Check Table 7.2-1 Criteria Check at Main Steam Outlet Nozzle in MS102 TS KEPCO & KHNP 30

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2.3.1.2 Loads Check TS Table 7.2-2 Load Check at Main Steam Outlet Nozzle in MS102 7.2.3.1.3 Conclusion Base on the above evaluation, it can be concluded that loads applying on SG steam outlet nozzle safe end are within the allowable, and therefore acceptable.

KEPCO & KHNP 31

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.2-3 The Stress at the Flued Head Penetration Anchor in MS102 TS 7.2.3.3 Branch Pipe Connection There is no Branch Pipe Connection in this piping subsystem.

KEPCO & KHNP 32

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.2.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.2-4 The Stress at the Pipe Support Location in MS102 TS 7.2.3.5 Valve There is no valve in this piping subsystem.

7.2.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 33

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3 MS103 7.3.1 Subsystem Plot TS Figure 7.3-1 Subsystem MS103 Plot KEPCO & KHNP 34

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3.2 Pipe Data Sheet TS Figure 7.3-2 Subsystem MS103 Pipe Data Sheet KEPCO & KHNP 35

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3.3 Piping Stress Evaluation Results 7.3.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the main steam outlet nozzle against maximum nozzle load criteria.

7.3.3.1.1 Criteria Check Table 7.3-1 Criteria Check at Main Steam Outlet Nozzle in MS103 TS KEPCO & KHNP 36

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3.3.1.2 Loads Check Table 7.3-2 Load Check at Main Steam Outlet Nozzle in MS103 TS 7.3.3.1.3 Conclusion Base on the above evaluation, it can be concluded that loads applying on SG steam outlet nozzle safe end are within the allowable, and therefore acceptable.

KEPCO & KHNP 37

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.3-3 The Stress at the Flued Head Penetration Anchor in MS103 TS 7.3.3.3 Branch Pipe Connection There is no Branch Pipe Connection in this piping subsystem.

KEPCO & KHNP 38

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.3.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.3-4 The Stress at the Pipe Support Location in MS103 TS 7.3.3.5 Valve There is no valve in this piping subsystem.

7.3.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 39

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4 MS104 7.4.1 Subsystem Plot TS Figure 7.4-1 Subsystem MS104 Plot KEPCO & KHNP 40

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4.2 Pipe Data Sheet TS Figure 7.4-2 Subsystem MS104 Pipe Data Sheet KEPCO & KHNP 41

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4.3 Piping Stress Evaluation Results 7.4.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the main steam outlet nozzle against maximum nozzle load criteria.

7.4.3.1.1 Criteria Check Table 7.4-1 Criteria Check at Main Steam Outlet Nozzle in MS104 TS KEPCO & KHNP 42

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4.3.1.2 Loads Check TS Table 7.4-2 Load Check at Main Steam Outlet Nozzle in MS104 7.4.3.1.3 Conclusion Base on the above evaluation, it can be concluded that loads applying on SG steam outlet nozzle safe end are within the allowable, and therefore acceptable.

KEPCO & KHNP 43

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.4-3 The Stress at the Flued Head Penetration Anchor in MS104 TS 7.4.3.3 Branch Pipe Connection There is no Branch Pipe Connection in this piping subsystem.

KEPCO & KHNP 44

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.4.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.4-4 The Stress at the Pipe Support Location in MS104 TS 7.4.3.5 Valve There is no valve in this piping subsystem.

7.4.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 45

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5 FW101 7.5.1 Subsystem Plot TS Figure 7.5-1 Subsystem FW101 Plot KEPCO & KHNP 46

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5.2 Pipe Data Sheet TS Figure 7.5-2 Subsystem FW101 Pipe Data Sheet KEPCO & KHNP 47

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5.3 Piping Stress Evaluation Results 7.5.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the S/G feedwater economizer nozzle against maximum nozzle load criteria.

7.5.3.1.1 Criteria Check Table 7.5-1 Criteria Check at Main Feedwater Economizer Nozzle in FW101 TS 7.5.3.1.2 Conclusion Base on the above evaluation, it can be concluded that loads applying on S/G feedwater economizer nozzle safe ends are within the allowable, and therefore acceptable.

KEPCO & KHNP 48

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.5-2 The Stress at the Flued Head Penetration Anchor in FW101 TS 7.5.3.3 Branch Pipe Connection The stresses at the branch pipe connection meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.5-3 The Stress at Branch Pipe Connection in FW101 TS 7.5.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

KEPCO & KHNP 49

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.5-4 The Stress at Pipe Support Location in FW101 (1/4) TS KEPCO & KHNP 50

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.5-4 The Stress at Pipe Support Location in FW101 (2/4) TS KEPCO & KHNP 51

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.5-4 The Stress at Pipe Support Location in FW101 (3/4) TS KEPCO & KHNP 52

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.5-4 The Stress at Pipe Support Location in FW101 (4/4) TS KEPCO & KHNP 53

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.5.3.5 Valve The stresses calculated at the valve location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.5-5 The Stress at the Valve Location in FW101 (1/2) TS KEPCO & KHNP 54

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.5-5 The Stress at the Valve Location in FW101 (2/2) TS 7.5.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 55

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6 FW102 7.6.1 Subsystem Plot TS Figure 7.6-1 Subsystem FW102 Plot KEPCO & KHNP 56

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6.2 Pipe Data Sheet TS Figure 7.6-2 Subsystem FW102 Pipe Data Sheet KEPCO & KHNP 57

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6.3 Piping Stress Evaluation Results 7.6.3.1 Nozzle Load The purpose of this evaluation is to check the loads at safe-end of the S/G feedwater economizer nozzle against maximum nozzle load criteria.

7.6.3.1.1 Criteria Check Table 7.6-1 Criteria Check at Main Feedwater Economizer Nozzle in FW102 TS KEPCO & KHNP 58

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6.3.1.2 Conclusion Base on the above evaluation, it can be concluded that loads applying on S/G feedwater economizer nozzle safe ends are within the allowable, and therefore acceptable.

7.6.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.6-2 The Stress at the Flued Head Penetration Anchor in FW102 TS 7.6.3.3 Branch Pipe Connection The stresses at the branch pipe connection meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.6-3 The Stress at Branch Pipe Connection in FW102 TS KEPCO & KHNP 59

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6.3.4 Pipe Support The stresses calculated at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.6-4 The Stress at Pipe Support Location in FW102 (1/4) TS KEPCO & KHNP 60

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.6-4 The Stress at Pipe Support Location in FW102 (2/4) TS KEPCO & KHNP 61

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.6-4 The Stress at Pipe Support Location in FW102 (3/4) TS KEPCO & KHNP 62

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.6-4 The Stress at Pipe Support Location in FW102 (4/4) TS KEPCO & KHNP 63

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.6.3.5 Valve The stresses calculated at the valve location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.6-5 The Stress at the Valve Location in FW102 (1/2) TS KEPCO & KHNP 64

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.6-5 The Stress at the Valve Location in FW102 (2/2) TS 7.6.3.6 Flanged Connection There is no flanged connection in this piping subsystem.

KEPCO & KHNP 65

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7 MS271 7.7.1 Subsystem Plot TS Figure 7.7-1 Subsystem MS271 Plot KEPCO & KHNP 66

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.2 Pipe Data Sheet TS Figure 7.7-2 Subsystem MS271 Pipe Data Sheet KEPCO & KHNP 67

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3 Piping Stress Evaluation Results 7.7.3.1 Nozzle Load There is no nozzle in this piping subsystem.

7.7.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.7-1 The Stress at Flued Head Penetration Anchor in MS271 (1/2) TS KEPCO & KHNP 68

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-1 The Stress at Flued Head Penetration Anchor in MS271 (2/2) TS 7.7.3.3 Penetration Sleeve Anchor Allowable Load Check 7.7.3.3.1 Purpose The piping penetration anchor is checked to verify to meet the structural integrity not to exceed allowable loads in accordance with the criteria in the applicable codes for the given loads.

7.7.3.3.2 Piping Information Piping Information Penetration No. PC-0612 Side A Subsystem 1-325-P397-MS271, Rev. 04, Node Point 5 Side B Subsystem 1-314-P397-MS103, Rev. 04, Node Point N037 KEPCO & KHNP 69

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.3.3 Analysis Input Inputs used for the analysis are provided in the following table. Applied loads such as SSE, Pipe Break, Weight, Pressure, etc., are combined to envelop worst case scenario and separate piping loads for both sides of the penetration are considered to the analysis model acting at the same time.

Table 7.7-2 Load Input for Penetration Assembly TS KEPCO & KHNP 70

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.3.4 Allowable Load Check for Penetration Assembly Following table summarizes analysis result for the piping penetration assembly of main steam line. Fatigue evaluation is performed for the MC component to have the result meeting the allowable factor.

Applicable Codes Piping and Head fitting ASME Sec. III, Subsection NC Sleeve ASME Sec. III, Subsection NE Table 7.7-3 Allowable Load Check for Penetration Assembly TS KEPCO & KHNP 71

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Figure 7.7-3 Penetration Assembly Model - MS System KEPCO & KHNP 72

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.4 Branch Pipe Connection The stresses calculated at branch pipe connections meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.7-4 The Stress at Branch Pipe Connection in MS271 (1/4) TS KEPCO & KHNP 73

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-4 The Stress at Branch Pipe Connection in MS271 (2/4) TS KEPCO & KHNP 74

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-4 The Stress at Branch Pipe Connection in MS271 (3/4) TS KEPCO & KHNP 75

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-4 The Stress at Branch Pipe Connection in MS271 (4/4) TS KEPCO & KHNP 76

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.5 Pipe Support The stresses at the support location meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

Table 7.7-5 The Stress at Pipe Support Location in MS271 (1/3) TS KEPCO & KHNP 77

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-5 The Stress at Pipe Support Location in MS271 (2/3) TS KEPCO & KHNP 78

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-5 The Stress at Pipe Support Location in MS271 (3/3) TS KEPCO & KHNP 79

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.6 Valve The stresses at valve connections meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

Table 7.7-6 The Stress at Valve Location in MS271 (1/5) TS KEPCO & KHNP 80

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-6 The Stress at Valve Location in MS271 (2/5) TS KEPCO & KHNP 81

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-6 The Stress at Valve Location in MS271 (3/5) TS KEPCO & KHNP 82

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-6 The Stress at Valve Location in MS271 (4/5) TS KEPCO & KHNP 83

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-6 The Stress at Valve Location in MS271 (5/5) TS KEPCO & KHNP 84

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.7.3.7 Flanged Connection The stresses at flanged connections meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

Table 7.7-7 The Stress at Flanged Connection in MS271 (1/4) TS KEPCO & KHNP 85

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-7 The Stress at Flanged Connection in MS271 (2/4) TS KEPCO & KHNP 86

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-7 The Stress at Flanged Connection in MS271 (3/4) TS KEPCO & KHNP 87

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.7-7 The Stress at Flanged Connection in MS271 (4/4) TS KEPCO & KHNP 88

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8 MS272 7.8.1 Subsystem Plot TS Figure 7.8-1 Subsystem MS272 Plot KEPCO & KHNP 89

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.2 Pipe Data Sheet TS Figure 7.8-2 Subsystem MS272 Pipe Data Sheet KEPCO & KHNP 90

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3 Piping Stress Evaluation Results 7.8.3.1 Nozzle Load There is no nozzle in this piping subsystem.

7.8.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

TS Table 7.8-1 The Stress at Flued Head Penetration Anchor in MS272 (1/2)

KEPCO & KHNP 91

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-1 The Stress at Flued Head Penetration Anchor in MS272 (2/2) 7.8.3.3 Penetration Sleeve Anchor Allowable Load Check 7.8.3.3.1 Purpose The piping penetration anchor is checked to verify to meet the structural integrity not to exceed allowable loads in accordance with the criteria in the applicable codes for the given loads.

7.8.3.3.2 Piping Information Piping Information Penetration No. PC-0611 Side A Subsystem 1-325-P397-MS272, Rev. 04, Node Point 5 Side B Subsystem 1-314-P397-MS104, Rev. 04, Node Point N037 7.8.3.3.3 Analysis Input Inputs used for the analysis are provided in the following table. Applied loads such as SSE, Pipe Break, Weight, Pressure, etc., are combined to envelop worst case scenario and separate piping loads for both sides of the penetration are considered to the analysis model acting at the same time.

KEPCO & KHNP 92

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 Table 7.8-2 Load Input for Penetration Assembly TS KEPCO & KHNP 93

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3.3.4 Allowable Load Check for Penetration Assembly Following table summarizes analysis result for the piping penetration assembly of main steam line. Fatigue evaluation is performed for the MC component to have the result meeting the allowable factor.

Applicable Codes Piping and Head fitting ASME Sec. III, Subsection NC Sleeve ASME Sec. III, Subsection NE TS Table 7.8-3 Allowable Load Check for Penetration Assembly KEPCO & KHNP 94

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Figure 7.8-3 Penetration Assembly Model - MS System KEPCO & KHNP 95

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3.4 Branch Pipe Connection The stresses at branch pipe connection meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

TS Table 7.8-4 The Stress at Branch Pipe Connection in MS272 (1/4)

KEPCO & KHNP 96

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-4 The Stress at Branch Pipe Connection in MS272 (2/4)

KEPCO & KHNP 97

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-4 The Stress at Branch Pipe Connection in MS272 (3/4)

KEPCO & KHNP 98

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-4 The Stress at Branch Pipe Connection in MS272 (4/4)

KEPCO & KHNP 99

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3.5 Pipe Support The stresses at the support location meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

TS Table 7.8-5 The Stress at Pipe Support Location in MS272 (1/4)

KEPCO & KHNP 100

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-5 The Stress at Pipe Support Location in MS272 (2/4)

KEPCO & KHNP 101

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-5 The Stress at Pipe Support Location in MS272 (3/4)

KEPCO & KHNP 102

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-5 The Stress at Pipe Support Location in MS272 (4/4)

KEPCO & KHNP 103

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3.6 Valve The stresses at valve connections meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

TS Table 7.8-6 The Stress at Valve Location in MS272 (1/4)

KEPCO & KHNP 104

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-6 The Stress at Valve Location in MS272 (2/4)

KEPCO & KHNP 105

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-6 The Stress at Valve Location in MS272 (3/4)

KEPCO & KHNP 106

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-6 The Stress at Valve Location in MS272 (4/4)

KEPCO & KHNP 107

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.8.3.7 Flanged Connection The stresses at flanged connection meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

TS Table 7.8-7 The Stress at Flanged Connection in MS272 (1/4)

KEPCO & KHNP 108

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-7 The Stress at Flanged Connection in MS272 (2/4)

KEPCO & KHNP 109

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-7 The Stress at Flanged Connection in MS272 (3/4)

KEPCO & KHNP 110

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.8-7 The Stress at Flanged Connection in MS272 (4/4)

KEPCO & KHNP 111

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9 FW209 7.9.1 Subsystem Plot TS Figure 7.9-1 Subsystem FW209 Plot KEPCO & KHNP 112

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.2 Pipe Data Sheet TS Figure 7.9-2 Subsystem FW209 Pipe Data Sheet KEPCO & KHNP 113

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.3 Piping Stress Evaluation Results 7.9.3.1 Nozzle Load There is no nozzle in this piping subsystem.

7.9.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

TS Table 7.9-1 The Stress at Flued Head Penetration Anchor in FW209 7.9.3.3 Penetration Sleeve Anchor Allowable Load Check 7.9.3.3.1 Purpose The piping penetration anchor is checked to verify to meet the structural integrity not to exceed allowable loads in accordance with the criteria in the applicable codes for the given loads.

KEPCO & KHNP 114

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.3.3.2 Piping Information Piping Information Penetration No. PC-0511 Side A Subsystem 1-325-P397-FW209, Rev. 03, Node Point 5 Side B Subsystem 1-315-P397-FW101, Rev. 06, Node Point N165 7.9.3.3.3 Analysis Input Inputs used for the analysis are provided in the following table. Applied loads such as SSE, Pipe Break, Weight, Pressure, etc., are combined to envelop worst case scenario and separate piping loads for both sides of the penetration are considered to the analysis model acting at the same time.

Table 7.9-2 Load Input for Penetration Assembly TS KEPCO & KHNP 115

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.3.3.4 Allowable Load Check for Penetration Assembly Following table summarizes analysis result for the piping penetration assembly of main steam line. Fatigue evaluation is performed for the MC component to have the result meeting the allowable factor.

Applicable Codes Piping and Head fitting ASME Sec. III, Subsection NC Sleeve ASME Sec. III, Subsection NE Table 7.9-3 Allowable Load Check for Penetration Assembly TS KEPCO & KHNP 116

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Figure 7.9-3 Penetration Assembly Model - FW System KEPCO & KHNP 117

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.3.4 Branch Pipe Connection There is no branch pipe connection in this piping subsystem.

7.9.3.5 Pipe Support The stresses at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.9-4 The Stress at the Pipe Support Location in FW209 TS KEPCO & KHNP 118

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.9.3.6 Valve The stresses at valve connection meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

TS Table 7.9-5 The Stress at Valve Location in FW209 (1/2)

KEPCO & KHNP 119

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.9-5 The Stress at Valve Location in FW209 (2/2) 7.9.3.7 Flanged Connection There is no flange connection in this piping subsystem.

KEPCO & KHNP 120

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10 FW219 7.10.1 Subsystem Plot TS Figure 7.10-1 Subsystem FW219 Plot KEPCO & KHNP 121

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.2 Pipe Data Sheet TS Figure 7.10-2 Subsystem FW219 Pipe Data Sheet KEPCO & KHNP 122

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.3 Piping Stress Evaluation Results 7.10.3.1 Nozzle Load There is no nozzle in this piping subsystem.

7.10.3.2 Flued Head Penetration Anchor The stresses at the flued head penetration anchor meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.10-1 The Stress at Flued Head Penetration Anchor in FW219 TS 7.10.3.3 Penetration Sleeve Anchor Allowable Load Check 7.10.3.3.1 Purpose The piping penetration anchor is checked to verify to meet the structural integrity not to exceed allowable loads in accordance with the criteria in the applicable codes for the given loads.

KEPCO & KHNP 123

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.3.3.2 Piping Information Piping Information Penetration No. PC-0512 Side A Subsystem 1-325-P397-FW219, Rev. 03, Node Point 5 Side B Subsystem 1-315-P397-AF101, Rev. 03, Node Point 425 7.10.3.3.3 Analysis Input Inputs used for the analysis are provided in the following table. Applied loads such as SSE, Pipe Break, Weight, Pressure, etc., are combined to envelop worst case scenario and separate piping loads for both sides of the penetration are considered to the analysis model acting at the same time.

TS Table 7.10-2 Load Input for Penetration Assembly KEPCO & KHNP 124

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.3.3.4 Allowable Load Check for Penetration Assembly Following table summarizes analysis result for the piping penetration assembly of main steam line. Fatigue evaluation is performed for the MC component to have the result meeting the allowable factor.

Applicable Codes Piping and Head fitting ASME Sec. III, Subsection NC Sleeve ASME Sec. III, Subsection NE Table 7.10-3 Allowable Load Check for Penetration Assembly TS KEPCO & KHNP 125

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Figure 7.10-3 Penetration Assembly Model - FW System KEPCO & KHNP 126

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.3.4 Branch Pipe Connection There is no branch pipe connection in this piping subsystem.

7.10.3.5 Pipe Support The stresses at the pipe support location meet all stress limitations specified in paragraphs NC-3650. The stress for each Code equation is tabulated below.

Table 7.10-4 The Stress at Pipe Support Location in FW219 (1/3) TS KEPCO & KHNP 127

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.10-4 The Stress at Pipe Support Location in FW219 (2/3)

KEPCO & KHNP 128

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.10-4 The Stress at Pipe Support Location in FW219 (3/3)

KEPCO & KHNP 129

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 7.10.3.6 Valve The stresses at valve connections meet all stress limitations specified in paragraphs NC-3650.

The stress for each Code equation is tabulated below.

TS Table 7.10-5 The Stress at Valve Location in FW219 (1/2)

KEPCO & KHNP 130

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 TS Table 7.10-5 The Stress at Valve Location in FW219 (2/2) 7.10.3.7 Flanged Connection There is no flange connection in this piping subsystem.

KEPCO & KHNP 131

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 8.0 COMPUTER CODE 8.1 PIPESTRESS 3.9.0 PIPESTRESS is a piping analysis program that is applied to the static and dynamic analyses including response spectra and time-history analyses. PIPESTRESS is used for the analysis of ASME Section III, Class 1, 2, and 3 as well as ASME B31.1 and B31.3 piping systems.

KEPCO & KHNP 132

Non-Proprietary Evaluation of Main Steam and Feedwater Piping applied to the graded approach for the APR1400 APR1400-E-B-NR-16001-NP, Rev. 0 9.0 REFERENCE

1. ASME B&PV Code Section III, 2007 Edition with 2008 Addenda.

2. APR1400 DC Piping Stress Reports for Subsystem 1MS101, 1MS102, 1MS103, 1MS104, 1FW101, 1FW102,1MS271, 1MS272, 1FW209 and 1FW219:

Calculation No. 1-314-P397-MS101, Rev. 7, dated 05/15/17.

Calculation No. 1-314-P397-MS102, Rev. 4, dated 04/20/17.

Calculation No. 1-314-P397-MS103, Rev. 4, dated 04/20/17.

Calculation No. 1-314-P397-MS104, Rev. 4, dated 04/20/17.

Calculation No. 1-313-P397-FW101, Rev. 7, dated 05/15/17.

Calculation No. 1-313-P397-FW102, Rev. 4, dated 04/20/17.

Calculation No. 1-325-P397-MS271, Rev. 4, dated 07/18/17.

Calculation No. 1-325-P397-MS272, Rev. 4, dated 07/18/17.

Calculation No. 1-325-P397-FW209, Rev. 3, dated 04/20/17.

Calculation No. 1-325-P397-FW219, Rev. 3, dated 04/20/17.

3. Piping and Instrumentation Diagram for MS System and FW System:

Drawing No. 1-521-M105-001, Rev. 1 dated 01/08/16.

Drawing No. 1-541-M105-003, Rev. 1, dated 05/22/17.

4. Piping Design Tables and Standard Details, 1-037-P443-001, Rev. 4, dated 08/25/15.

5. Piping System Design Specification (PSDS) :

General PSDS, 1-037-N407-001, Rev. 1, dated 12/30/14 IRWST System PSDS, 1-447-N407-001, Rev. 1, dated 02/28/12 MS System PSDS, 1-521-M407-001, Rev. 0, dated 06/29/15 FW System PSDS, 1-541-M407-001, Rev. 1, dated 07/30/15

6. PIPESTRESS Computer Program /

KEPCO E&C Register No. : E-P-PD-1338-3.9.0/DC, and Users Manual.

7. Standard Review Plan, Section 3.6.2, Determination of Rupture Locations and Dynamic Effects Associated with the Postulated Rupture of Piping.

KEPCO & KHNP 133