Dalian Dagao team has completed product identification for the "explosion valve for nuclear power plants" first in China

On February 3, 2018, the "Explosion Valve for Nuclear Power Plants" product appraisal meeting jointly developed by Dalian Dagao Valve Co., Ltd., China Academy of Engineering Physics Chemical Materials Research Institute, and Shanghai Nuclear Engineering Research and Design Institute Co., Ltd. was held at Dalian Dagao Valve Co., Ltd. It successfully passed the appraisal meeting organized by the China Machinery Industry Federation and the China General Machinery Industry Association. The participating units include the Major Office of the Ministry of Science and Technology, the Nuclear Power Department of the National Energy Administration, the China Machinery Industry Federation, the China General Machinery Industry Association, the China Nuclear Power Development Center, the China National Nuclear Industry Corporation, the China General Nuclear Power Group Co., Ltd., the Nuclear and Radiation Safety Center of the Ministry of Environmental Protection, the National Electric Power Investment Science and Technology Research Institute, the China National Nuclear Corporation Xiapu Nuclear Power Co., Ltd., the National Nuclear Power Technology Company, the National Nuclear Demonstration Power Station Co., Ltd., Shandong Nuclear Power Co., Ltd., China Nuclear Power Engineering Co., Ltd., China Zhongyuan Foreign Engineering Co., Ltd., the China Nuclear Power Research and Design Institute, the China General Nuclear Power Research Institute Co., Ltd., Dalian University of Technology, Nanjing University of Technology, etc. The expert group consists of two academicians Ye Qizhen and Cheng Gengdong, as well as 11 experts. The sentence is:. The review team and attendees first inspected the production and testing site, witnessed some performance tests of the blasting valve, watched video materials of some important tests, and consulted relevant design, manufacturing, testing, inspection, and quality assurance documents. Subsequently, the representative R&D team of Dalian Dagao reported on the development of the blasting valve, reviewing in detail the independent development process of the blasting valve over the past eight years. It has gone through stages such as prototype trial production, engineering prototype development and valve opening test verification, and prototype EQ evaluation. With years of experience in nuclear power valve design and manufacturing, as well as technical accumulation in the field of pyrotechnic products, the R&D team has independently developed a graphite sealing structure for blasting valves, which has improved the sealing reliability of valve components under various working conditions; We have independently developed a piston dynamic sealing structure for blasting valves, which improves the utilization rate of gunpowder output energy and ensures the realization of valve safety functions; We have established an optimization design method for shear caps and overcome the forging process of 690 material shear caps, ensuring the performance of the shear cap material; Independently developed the key component of the blasting valve - the cartridge drive device, which meets the reliable operation requirements under harsh environmental conditions such as high temperature, high humidity, and high radiation in nuclear power; We have established an internal ballistic calculation method suitable for blasting valves and a dynamic simulation analysis method for the entire blasting valve and key components, providing theoretical support for the development of blasting valves; A total of fourteen patents and twenty-one enterprise standards have been formed; Completed the research and development of explosive valves for nuclear power plants with independent intellectual property rights, forming a series of products; We have established a collaborative innovation system for the design, manufacturing, testing, and other aspects of blast valves, which has effectively enhanced the innovation capability of key valves in China's nuclear power industry. The achievements made in the research and development of blasting valves have been highly praised by review experts and relevant witness leaders. The appraisal committee unanimously believes that the prototype of the developed blasting valve product is successful, has completely independent intellectual property rights, fills the domestic gap, and ranks at the international leading level. It can be promoted and applied in nuclear power plants. The appraisal committee unanimously agreed to pass the appraisal. The leaders of the Ministry of Science and Technology and the Energy Bureau highly praised the technological achievements of "blasting valves for nuclear power plants", put forward expectations for future applications, and provided key support for the application and transformation of major special scientific and technological achievements in the next stage. The success of this meeting marks that China has fully mastered the independent design and manufacturing technology of blasting valves, and has complete independent intellectual property rights. Dalian Dagao Valve Co., Ltd. has achieved phased success in the development of blasting valves, contributing to the localization of major nuclear power equipment in the country, replacing foreign imports, and will continue to supply blasting valve products to the National Nuclear Demonstration Power Plant and Haiyang Nuclear Power Plant Phase II that have signed supply contracts.