T/CNIDA 013-2023 Active Group standards

T/CNIDA 013-2023 The analysis method for the pressure tube of a heavy water reactor that leaks first and then breaks

Publish Date: 2023-06-16 Implement Date: 2023-07-16 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CNIDA 013-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Nuclear reactors and nuclear island equipment in nuclear power plants

ICS Name: Nuclear power stations, safety

Publish Date: 2023-06-16

Implement Date: 2023-07-16

Pages: 28 pages

Scope

This document specifies a deterministic analysis method for Zr2.5Nb alloy pressure tubes used in heavy water reactors, which first leaks and then breaks. The method is used to analyze whether pressure tubes containing through-cracks will first leak and then break during a reactor shutdown. Specifically, when the pressure tube leaks coolant due to a crack that penetrates the tube wall, the analysis determines whether the crack size does not exceed the critical crack length during the process from reactor shutdown to entering the cold shutdown state. This document applies to the analysis of Zr alloy pressure tubes in heavy water reactors caused by the aging mechanism of hydrogen-induced delayed cracks. However, it does not apply to the degradation mechanism caused by contact between the pressure tube and the drainage tube.