The drafting units of this standard are: West New Zirconium Nuclear Material Technology Co., Ltd., China Nuclear Power Research and Design Institute, Suzhou Thermal Engineering Research Institute Co., Ltd., Xi 'an Hantang Analysis and Testing Co., Ltd., Shenzhen Wanside Automation Equipment Co., Ltd. and Northwest Nonferrous Metals Research Institute. The main drafters of this standard are Hui Boning, Zhou Jun, Li Fan, Shang Xiaodi, Li Yuli, Dai Xun, Zhang Yanwei, Hong Xiaofeng, Bai Guanghai, Jiao Lei, Li Shunping and Yu Min.
The standard of internal pressure creep test method for zirconium alloy pipe is to connect one end of the sealed sample with the pressurization system, and the test environment should be protected by vacuum or inert atmosphere. After heating to the test temperature, using inert gas as the medium, a constant test force is applied in the tube for a certain time, and the mechanical properties such as creep elongation of outer diameter are measured, and finally the internal pressure creep performance of zirconium alloy tube is tested.
This standard is formulated for the first time according to the situation of internal pressure creep test industry of zirconium alloy pipes in China, which fills a blank in the internal pressure creep test method of zirconium alloy pipes used in nuclear industry in China. In the process of drafting this standard, a lot of tests and verifications were carried out in combination with many years of internal pressure creep test experience of zirconium alloy cladding tubes for nuclear use in China, and the experience and present situation of nuclear materials research institutes, universities and production and processing enterprises in China were also considered. This standard is at the international advanced level.
The internal pressure creep test method of zirconium alloy tube fully considers the technical level of zirconium alloy material research institutes, production and processing enterprises and users in China. After the promulgation and implementation of this standard on April 1 2022, it will be beneficial to adopt a unified method to carry out internal pressure creep test of zirconium alloy pipes, further strengthen the nuclear safety evaluation means of materials used in nuclear reactors, form a fair market trading environment, and have great social benefits.