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ASME BPVC.III.NCA-2025

2025 ASME Boiler and Pressure Vessel Code, Section III, Subsection NCA, General Requirements for Division 1 and Division 2
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ASME BPVC.III.NCA-2025

2025 ASME Boiler and Pressure Vessel Code, Section III, Subsection NCA, General Requirements for Division 1 and Division 2

PUBLISH DATE 2025
ASME BPVC.III.NCA-2025
The purpose of ASME BPVC.III.NCA-2025 is to serve as the master set of General Requirements that govern the overall process, quality, and administrative duties for the entire ASME BPVC Section III (Rules for Construction of Nuclear Facility Components), covering both Division 1 (metallic) and Division 2 (concrete) construction.
What It Is Used For Subsection NCA is the foundational document for anyone involved in constructing a nuclear power plant component. It doesn't detail how to design a pressure vessel (that's in NB, NC, etc.), but rather sets the framework for who does the work, how they prove their competence, and what documentation is required. It is effectively the quality assurance backbone of Section III. Its primary uses are:
  • Defining Roles and Responsibilities: It clearly outlines the mandatory duties and responsibilities for every party in the nuclear supply chain, including the Owner, the N-Certificate Holder (the manufacturer/constructor), the Material Organization, and the Authorized Inspection Agency (AIA).
  • Establishing the Quality Assurance (QA) Program: Subsection NCA specifies the requirements for the establishment and implementation of a Quality Assurance Program (often referencing ASME NQA-1), which must be audited and certified by ASME before any Code work can begin.
  • Component Classification: It contains the mandatory rules for the classification of components (e.g., Class 1, 2, 3, MC, CS, CC) based on their safety significance, which in turn determines which specific Subsection of Division 1 or Division 2 applies for design and fabrication.
  • Certification and Stamping: It details the requirements for obtaining and using the ASME Code Symbol Stamps (such as 'N', 'NPT', or 'NA') and for preparing and certifying the mandatory Data Report Forms that legally document a component's adherence to the Code.
  • Scope and Application: It defines the precise scope of Section III, what items are included or excluded from Code requirements, and which edition of the Code is applicable to a specific construction project.
In summary, BPVC.III.NCA is the governance document that ensures an adequate system of checks, balances, and documentation is in place for all nuclear construction work, providing the assurance of safety and quality required by regulators worldwide.
SDO ASME: American Society of Mechanical Engineers
Document Number BPVC.III.NCA
Publication Date July 1, 2025
Language en - English
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