2023 ASME BPVC Section III Division 5 PDF
Section III – Division 5 contains rules for the construction of high-temperature reactors.
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.
ORGANIZATION OF SECTION III
1 GENERAL
Section III consists of Division 1, Division 2, Division 3, Division 4, and Division 5. These Divisions are broken down
into Subsections and are designated by capital letters preceded by the letter “N” for Division 1, by the letter “C” for Division
2, by the letter “W” for Division 3, by the letter “F” for Division 4, and by the letter “H” for Division 5. Each Subsection
is published separately, with the exception of those listed for Divisions 2, 3, 4, and 5.
• Subsection NCA — General Requirements for Division 1 and Division 2
• Appendices
• Division 1
– Subsection NB — Class 1 Components
– Subsection NCD — Class 2 and Class 3 Components
– Subsection NE — Class MC Components
– Subsection NF — Supports
– Subsection NG — Core Support Structures
• Division 2 — Code for Concrete Containments
– Subsection CC — Concrete Containments
• Division 3 — Containment Systems for Transportation and Storage of Spent Nuclear Fuel and High-Level Radioactive
Material
– Subsection WA — General Requirements for Division 3
– Subsection WB — Class TC Transportation Containments
– Subsection WC — Class SC Storage Containments
– Subsection WD — Class ISS Internal Support Structures
• Division 4 — Fusion Energy Devices
– Subsection FA — Fusion Energy Device Facilities
– Subsection FB — Pressure Boundary Components
• Division 5 — High Temperature Reactors
– Subsection HA — General Requirements
Subpart A — Metallic Materials
Subpart B — Graphite Materials
Subpart C — Composite Materials
– Subsection HB — Class A Metallic Pressure Boundary Components
Subpart A — Low Temperature Service
Subpart B — Elevated Temperature Service
– Subsection HC — Class B Metallic Pressure Boundary Components
Subpart A — Low Temperature Service
Subpart B — Elevated Temperature Service
– Subsection HF — Class A and B Metallic Supports
Subpart A — Low Temperature Service
– Subsection HG — Class SM Metallic Core Support Structures
Subpart A — Low Temperature Service
Subpart B — Elevated Temperature Service
– Subsection HH — Class SN Nonmetallic Core Components
Subpart A — Graphite Materials
Subpart B — Composite Materials
2 SUBSECTIONS
Subsections are divided into Articles, subarticles, paragraphs, and, where necessary, subparagraphs and
subsubparagraphs.
3 ARTICLES
Articles are designated by the applicable letters indicated above for the Subsections followed by Arabic numbers, such
as NB-1000. Where possible, Articles dealing with the same topics are given the same number in each Subsection, except
NCA, in accordance with the following general scheme:
Article Number Title
1000 Introduction or Scope
2000 Material
3000 Design
4000 Fabrication and Installation
5000 Examination
6000 Testing
7000 Overpressure Protection
8000 Nameplates, Stamping With Certification Mark, and Reports
The numbering of Articles and the material contained in the Articles may not, however, be consecutive. Due to the fact
that the complete outline may cover phases not applicable to a particular Subsection or Article, the rules have been prepared
with some gaps in the numbering.
4 SUBARTICLES
Subarticles are numbered in units of 100, such as NB-1100.
5 SUBSUBARTICLES
Subsubarticles are numbered in units of 10, such as NB-2130, and generally have no text. When a number such as
NB-1110 is followed by text, it is considered a paragraph.
6 PARAGRAPHS
Paragraphs are numbered in units of 1, such as NB-2121.
7 SUBPARAGRAPHS
Subparagraphs, when they are major subdivisions of a paragraph, are designated by adding a decimal followed by one
or more digits to the paragraph number, such as NB-1132.1. When they are minor subdivisions of a paragraph, subparagraphs
may be designated by lowercase letters in parentheses, such as NB-2121(a).
8 SUBSUBPARAGRAPHS
Subsubparagraphs are designated by adding lowercase letters in parentheses to the major subparagraph numbers,
such as NB-1132.1(a). When further subdivisions of minor subparagraphs are necessary, subsubparagraphs are designated
by adding Arabic numerals in parentheses to the subparagraph designation, such as NB-2121(a)(1).
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