China Nuclear Su valve: "Hualong No. 1" main steam isolation valve complete factory acceptance

Valves are key equipment for the safe operation of nuclear power plants. In the pre-projects, the core nuclear and nuclear secondary valves such as nuclear electric gate valves, nuclear primary regulating valves, main steam isolation valves, main steam safety valves and main feedwater regulating valves Equal value-added key valves have long been monopolized by foreign suppliers.

"Hualong No. 1", as the third-generation million kilowatt-scale pressurized water reactor nuclear power plant with independent intellectual property rights in China, must be "independently designed, autonomously manufactured, self-constructed, and operated independently" in order to reduce cost and improve self-controllability. Guided by the guideline, we will increase the localization rate of equipment and the level of independent design.

The main steam isolation valve is one of the key equipments of nuclear power plants. The design life of the main steam isolation valve of “Hualong I” has been extended from 40 years to 60 years, and the seismic requirements have been increased from 0.2g to 0.3g. At the same time, the requirements for severe accident conditions have been increased. This has given localization to the main steam isolation valve. Bigger challenge. China National Nuclear Power Engineering Co., Ltd. practices the social responsibility of the state-owned enterprises and join hands with China Nuclear Su Valve Technology Industrial Co., Ltd. to raise the banner of the pioneers of valve localization.

In order to promote the localization of this equipment, China Nuclear Power Engineering Co., Ltd. performed contract execution of the sandbox at the beginning of contract signing, invited experts to conduct special assessments of contract execution, contract execution planning, and so on, to predict the risk of contract execution in advance, and Develop corresponding countermeasures.

In order to ensure the timely and successful completion of the certification of the prototype verification and nuclear safety bureau, China Nuclear Power Engineering Co., Ltd. and the China Nuclear Susong Co., Ltd. held a special coordination meeting each week, and held a daily teleconference during the daily management process. At the same time, the Purchasing Department and Design Institute of China Nuclear Power Engineering Co., Ltd. jointly established the “Validation of Valve Prototype Young Assault Team”, promoted the “nail spirit”, made unremitting efforts, continued innovation, and overcame the outside of the localization of the main steam isolation valve. Difficulty in design, procurement, construction, etc., eventually completed the manufacture of equipment and factory acceptance.

Through the implementation of innovation-driven development strategy under the guidance of technology and management innovation, Fuqing 5,6 project to achieve the first localization of the main steam isolation valve, in advance with the delivery conditions for the nuclear island key valve delivery has won a good start, also It has laid a solid foundation for the smooth building of the first batch of “Hualong 1” in the world, fulfilling the expectations of the Prime Minister and creating a beautiful business card for “Hualong One”.

(Original title: "Hualong No. 1" first batch of domestic main steam isolation valve acceptance in advance)