NB/T 20407-2017Specification for design and fabrication of reactor vessel internals in pressurized water reactor nuclear power plants (English PDF)

NB/T 20407-2017 is the English-translated version of 压水堆核电厂堆内构件设计制造规范.

NB/T 20407-2017 is the Chinese energy industry standard for the reactor vessel internals of pressurized water reactor nuclear power plants, and it brings design and fabrication together in a single specification.

Reactor internals are the structures inside the reactor pressure vessel that hold the core in position and direct the flow of coolant, and they rank among the largest nuclear grade stainless steel components in the plant.

The standard is classified F69 and is recommended. It cites GB/T 4334-2008, GB/T 17569, GB/T 19418-2003, NB/T 20001, the seven parts of NB/T 20002, NB/T 20004, and a run of GB/T 223 chemical analysis methods for steel, beginning with GB/T 223.1 and GB/T 223.11. Issued on 10 February 2017, it has applied since 1 July 2017.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 32 pages — is available in the English PDF.

GB/T 16702.6-2025|NB/T 20481-2018|NB/T 20315-2014|NB/T 20006.2-2021|NB/T 20009.36-2018|NB/T 20478.2-2018

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