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ASME BPVC.III.1.NCD-2021
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ASME BPVC.III.1.NCD-2021 2021 ASME Boiler and Pressure Vessel Code, Section III: Rules for Construction of Nuclear Power Plant Components, Division 1, Subsection NCD, Class 2 and Class 3 Components
standard by ASME International, 07/01/2021
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Product Scope / Abstract
This Subsection contains requirements for the material, design, fabrication, examination, testing and overpressure protection of items which are intended to conform to the requirements for Class 1 construction. The rules of Subsection NB cover the requirements for assuring the structural integrity of items.
Careful application of this Section will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.
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ASME BPVC.III.1.NCD-2021
SECTION III
Rules for Construction of
Nuclear Facility Components
ASME Boiler and
2021
Pressure Vessel Code
An International Code
Division 1 — Subsection NCD
Class 2 and Class 3 Components
Markings such as “ASME,” “ASME Standard,” or any other marking including “ASME,” ASME logos, or the ASME Single Cer�fica�on Mark shall not be used on any item that is not constructed in accordance with all of the applicable requirements of the Code or Standard. Use of of the ASME Single Cer�fica�on Mark requires formal ASME cer�fica�on; if no cer�fica�on program is available, such ASME markings may not be used. (For Cer�fica�on and Accredita�on Programs, see h�ps://www.asme.org/cer�fica�on-accredita�on.)
Items produced by par�es not formally possessing an ASME Cer�ficate may not be described, either explicitly or implicitly, as ASME cer�fied or approved in any code forms or other document.
Markings such as “ASME,” “ASME Standard,” or any other marking including “ASME,” ASME logos, or the ASME Single Cer�fica�on Mark shall not be used on any item that is not constructed in accordance with all of the applicable requirements of the Code or Standard. Use of of the ASME Single Cer�fica�on Mark requires formal ASME cer�fica�on; if no cer�fica�on program is available, such ASME markings may not be used. (For Cer�fica�on and Accredita�on Programs, see h�ps://www.asme.org/cer�fica�on-accredita�on.)
Items produced by par�es not formally possessing an ASME Cer�ficate may not be described, either explicitly or implicitly, as ASME cer�fied or approved in any code forms or other document.
AN INTERNATIONAL CODE
2021 ASME Boiler & Pressure Vessel Code
2021 Edition July 1, 2021
AN INTERNATIONAL CODE
2021 ASME Boiler & Pressure Vessel Code
2021 Edition July 1, 2021
III
RULES FOR CONSTRUCTION
OF NUCLEAR FACILITY COMPONENTS
Division 1 - Subsection NCD Class 2 and Class 3 Components
ASME Boiler and Pressure Vessel Committee
on Construction of Nuclear Facility Components
Two Park Avenue • New York, NY • 10016 USA
Date of Issuance: July 1, 2021
This international code or standard was developed under procedures accredited as meeting the criteria for American National Standards and it is an American National Standard. The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at- large.
ASME does not “approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is
entirely their own responsibility.
Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.
ASME accepts responsibility for only those interpretations of this document issued in accordance with the estab- lished ASME procedures and policies, which precludes the issuance of interpretations by individuals.
The endnotes and preamble in this document (if any) are part of this American National Standard.
ASME Collective Membership Mark
ASME Single Certification Mark
"ASME" and the above ASME symbols are registered trademarks of The American Society of Mechanical Engineers.
No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the
publisher.
Library of Congress Catalog Card Number: 56-3934 Printed in the United States of America
Adopted by the Council of The American Society of Mechanical Engineers, 1914; latest edition 2021.
The American Society of Mechanical Engineers Two Park Avenue, New York, NY 10016-5990
Copyright © 2021 by
THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
All rights reserved
TABLE OF CONTENTS
List of Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Statement of Policy on the Use of the ASME Single Certification Mark and Code Authorization in Advertising xv
Statement of Policy on the Use of ASME Marking to Identify Manufactured Items . . . . . . . . . . . . . . . . . . . xv
Submittal of Technical Inquiries to the Boiler and Pressure Vessel Standards Committees . . . . . . . . . . . . . xvi
Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
Organization of Section III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xl
Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xliv
NC- and ND- Paragraphs, Figures, and Tables Renumbered for Subsection NCD . . . . . . . . . . . . . . . . . . . . xlvi Cross-Referencing and Stylistic Changes in the Boiler and Pressure Vessel Code . . . . . . . . . . . . . . . . . . . . xlix
Article NCD-1000 | Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 1 |
NCD-1100 | Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 1 |
Article NCD-2000 | Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 6 |
NCD-2100 | General Requirements for Material . . . . . . . . . . . . . . . . . . . . . . . . . . | 6 |
NCD-2200 | Material Test Coupons and Specimens for Ferritic Steel Material . . . . . | 9 |
NCD-2300 | Fracture Toughness Requirements for Material . . . . . . . . . . . . . . . . . | 13 |
NCD-2400 | Welding Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 20 |
NCD-2500 | Examination and Repair of Pressure-Retaining Material . . . . . . . . . . . | 24 |
NCD-2600 | Material Organizations' Quality System Programs . . . . . . . . . . . . . . . . | 37 |
NCD-2700 | Dimensional Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 37 |
Article NCD-3000 | Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 38 |
NCD-3100 | General Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 38 |
NCD-3200 | Alternative Design Rules for Class 2 Vessels . . . . . . . . . . . . . . . . . . . | 46 |
NCD-3300 | Vessel Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 79 |
NCD-3400 | Pump Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 117 |
NCD-3500 | Valve Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 143 |
NCD-3600 | Piping Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 152 |
NCD-3700 | Electrical and Mechanical Penetration Assemblies . . . . . . . . . . . . . . . | 189 |
NCD-3800 | Design of Atmospheric Storage Tanks . . . . . . . . . . . . . . . . . . . . . . . . | 189 |
NCD-3900 | Design of 0 psi to 15 psi (0 kPa to 100 kPa) Storage Tanks . . . . . . . . | 202 |
Article NCD-4000 | Fabrication and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 242 |
NCD-4100 | General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 242 |
NCD-4200 | Forming, Cutting, and Aligning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 243 |
NCD-4300 | Welding Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 279 |
NCD-4400 | Rules Governing Making, Examining, and Repairing Welds . . . . . . . . . | 288 |
NCD-4500 | Brazing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 294 |
NCD-4600 | Heat Treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 297 |
NCD-4700 | Mechanical Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 303 |
NCD-4800 | Expansion Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 304 |
Article NCD-5000 | Examination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 305 |
NCD-5100 | General Requirements for Examination . . . . . . . . . . . . . . . . . . . . . . . | 305 |
NCD-5200 | Examination of Welds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 307 |
NCD-5300 | Acceptance Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 312 |
NCD-5400 | For Class 3 Only — Spot Examination of Welded Joints . . . . . . . . . . . | 314 |
NCD-5500 | Qualifications and Certification of Nondestructive Examination Personnel | 315 |
NCD-5600 | For Class 2 Only — Final Examination of Components . . . . . . . . . . . . | 316 |
NCD-5700 | Examination Requirements for Expansion Joints . . . . . . . . . . . . . . . . . | 316 |
Article NCD-6000 | Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 318 |
NCD-6100 | General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 318 |
NCD-6200 | Hydrostatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 320 |
NCD-6300 | Pneumatic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 321 |
NCD-6400 | Pressure Test Gages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 321 |
NCD-6500 | Atmospheric and 0 psig to 15 psig (0 kPa gage to 100 kPa gage) Storage Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 322 |
NCD-6600 | Special Test Pressure Situations . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 324 |
NCD-6900 | Proof Tests to Establish Design Pressure . . . . . . . . . . . . . . . . . . . . . . | 324 |
Article NCD-7000 | Overpressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 329 |
NCD-7100 | General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 329 |
NCD-7200 | Overpressure Protection Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 331 |
NCD-7300 | Relieving Capacity Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 332 |
NCD-7400 | Set Pressures of Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . | 333 |
NCD-7500 | Operating and Design Requirements for Pressure and Vacuum Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 333 |
NCD-7600 | Nonreclosing Pressure Relief Devices . . . . . . . . . . . . . . . . . . . . . . . . | 338 |
NCD-7700 | Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 340 |
NCD-7800 | Marking, Stamping With Certification Mark, and Data Reports . . . . . . . | 342 |
Article NCD-8000 | Nameplates, Stamping With Certification Mark, and Reports . . . . | 344 |
NCD-8100 | General Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 344 |
Figures | ||
NCD-1132.2-1 | Attachments in the Component Support Load Path That Do Not Perform a Pressure-Retaining Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 3 |
NCD-1132.2-2 | Attachments That Do Not Perform a Pressure-Retaining Function and Are Not in the Component Support Load Path (Nonstructural Attachments) | 4 |
NCD-1132.2-3 | Attachments That Perform a Pressure-Retaining Function . . . . . . . . . . | 5 |
NCD-2433.1-1 | Weld Metal Delta Ferrite Content . . . . . . . . . . . . . . . . . . . . . . . . . . . | 23 |
NCD-2575.2-1 | Typical Pressure-Retaining Parts of Pumps and Valves . . . . . . . . . . . . | 35 |
NCD-3133.4-1 | For Class 3 Only — Length L of Some Typical Conical Sections . . . . . . | 43 |
NCD-3133.8-1 | Chart for Determining Wall Thickness of Tubes Under External Pressure | 47 |
NCD-3217-1 | Example of Acceptable Local Primary Membrane Stress Due to Pressure | 51 |
NCD-3224.6-1 | Design Curves for Torispherical Heads and 2:1 Ellipsoidal Heads for Use With NCD-3224.8 and NCD-3224.6 . . . . . . . . . . . . . . . . . . . . . . . . | 56 |
NCD-3224.13(b)(6)(-a)-1 | Inherent Reinforcement for Large End of Cone–Cylinder Junction . . . . | 58 |
NCD-3224.13(b)(6)(-b)-1 | Values for Q for Large End of Cone–Cylinder Junction . . . . . . . . . . . . | 59 |
NCD-3224.13(c)(6)(-a)-1 | Inherent Reinforcement for Small End of Cone–Cylinder Junction . . . . | 60 |
NCD-3224.13(c)(6)(-b)-1 | Values for Q for Small End of Cone–Cylinder Junction . . . . . . . . . . . . . | 61 |
NCD-3224.13(d)-1 | Cone–Cylinder Junction at Small End Treated as Opening . . . . . . . . . . | 62 |
NCD-3225-1 | Typical Flat Heads and Supported and Unsupported Tubesheets With Hubs | 64 |
NCD-3225-2 | Some Acceptable Types of Unstayed Flat Heads and Covers . . . . . . . . | 65 |
NCD-3225-3 | Attachment of Pressure Parts to Plates to Form a Corner Joint . . . . . . | 66 |
NCD-3234.2(a)-1 | Nozzle Nomenclature and Dimensions . . . . . . . . . . . . . . . . . . . . . . . . | 69 |
NCD-3239.1(b)-1 | Examples of Acceptable Transition Details . . . . . . . . . . . . . . . . . . . . . | 70 |
NCD-3239.4-1 | Limits of Reinforcing Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 72 |
NCD-3324.2-1 | Principal Dimensions of Typical Heads . . . . . . . . . . . . . . . . . . . . . . . | 81 |
NCD-3324.11(a)(6)-1 | Large Head Openings, Reverse Curve, and Conical Shell Reducer Sections | 86 |
NCD-3325-1 | Some Acceptable Types of Unstayed Flat Heads and Covers . . . . . . . . | 88 |
NCD-3326.1-1 | Spherically Dished Covers With Bolting Flanges . . . . . . . . . . . . . . . . . | 92 |
NCD-3329.1(b)-1 | Example of Tube Spacing With Pitch of Holes Equal in Every Row . . . | 94 |
NCD-3329.1(b)-2 | Example of Tube Spacing With Pitch of Holes Unequal in Every Second Row | 95 |
NCD-3329.1(b)-3 | Example of Tube Spacing With Pitch of Holes Varying in Every Second and | |
Third Row . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . | 95 | |
NCD-3329.1(d)-1 | Example of Tube Spacing With Tube Holes on Diagonal Lines . . . . . . . |
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