Million-kilowatt nuclear power plant main steam safety valve is expected to be localized

“Now, our village relies on the largest miniature bearing production base in the north of the country. Almost every family opens a store, conducts business in every household, makes a home from processing bearings and marketing bearings, and rolls the 'iron chain' into a 'golden chain'.” August On the 13th, Liu Ziming, secretary of the Party Branch of Qianfudu Village, Weiweizhai Township, Guantao County, Hebei Province, pointed to the writer who was carrying large bearings in the Sinotrans.

At present, there are 98 enterprises above the designated size for bearing processing in Weiyuzhai Town, which have grown to more than 2,000 processing households, with an annual turnover of 1.4 billion yuan and profits and taxes of 9 million yuan. Nearly half of the town's rural households have shifted from the past to agriculture, and they have shifted to bearing-based processing. The average annual net income of farmers in 11 specialized bearing villages is 12,000 yuan, which is 3 times the per capita net income of the county. The town’s bearing industry has radiated to 111 villages in the three surrounding townships in the county and surrounding counties in Qiu County and Quzhou County. Wei Zhizhai Town Party Committee Secretary of the county, Wang Zhijun, said that in the next step, we must guide enterprises' bosses to scale up and upgrade their grades, implement equipment, technological innovation and innovation, create superior brands, increase competitiveness, and make the miniature bearing industry bigger and stronger. , To build the country's largest miniature bearing production base.

Weitaozhai Town, Guantao County is the largest miniature bearing production base in the north of China. The production of miniature bearings here accounts for more than 90% of the country's total, and about 60% of the miniature bearings used in China are produced here. In recent years, Guantao County has guided enterprises and processors to follow the path of scale, standardization, branding, and industrialization to promote the rapid development of the miniature bearing industry. Located in the town's Mingzhu Bearing Industrial Zone, Xingxing Bearing Co., Ltd. has registered the “Star” trademark, which started the brand. Last year, the company exported 1.3 billion sets of bearings, an increase of 21% over the previous year.

Liu Sanlin, a villager of the former Fudu Village in the county, is a professional bearing bearing manufacturer. He initially polished by hand. Once a day, he can process hundreds of sets. Now, he built his own modern company, industrial production. In the vast workshop, there are seven or eight workers, all of which are digital devices. The automated production divides a small set of bearings into more than forty processes. Within a few seconds, dozens of bearings complete the inner ring channel process. According to Liu Sanlin, last year, his company's annual output value has reached more than 20 million yuan. In the next step, it will also expand the scale, make the miniature bearing cake bigger, and roll the "iron chain" out of the "golden chain" and roll out " Big gold bar."

Recently, commissioned by the National Energy Administration, the China National Machinery Industry Federation organized the product design for the main steam safety valve of a million kilowatt nuclear power plant developed by Dongwu Machinery Co., Ltd. of Wujiang City and its associated thermal test device. The review meeting for the scheme and test device technology program was chaired by Mr. Yan Yongbin, President of China General Machinery Industry Association. Deputy Director of the Department of Energy Conservation and Technology Equipment of the National Energy Administration attended the meeting and delivered an important speech. Also attending the meeting was Secretary of the China Valve Association Song Yinli and other industry leaders. China National Nuclear Power Engineering Co., Ltd., China Guangdong Nuclear Power Engineering Design Co., Ltd., China Nuclear Power Technology Research Institute, China Nuclear Power Engineering Co., Ltd., Shanghai Nuclear Engineering Research and Design Institute, China Zhongyuan Foreign Engineering Co., Ltd., Shanghai Nuclear Power Equipment Corporation and the National Nuclear Safety Review of the Ministry of Environmental Protection Relevant representatives of the center attended the review meeting. At the meeting, Dongwu Machinery Co., Ltd. reported to the leaders and experts on the main steam safety valve design scheme and thermal test device technology program for millions of kilowatts of nuclear power plants. Experts at the meeting fully expressed their opinions. The meeting formed some basic consensus. The design of Dongwu Machinery was basically approved by the experts attending the conference. The certification test program and discharge verification program jointly prepared by the company and China Kehua Nuclear Power Technology Research Institute are generally feasible and can be further improved in how to maximize the capabilities of the test device. The safety valve hot test device invested and constructed by the company meets the requirements of the ASME PTC-25 standard and can meet the qualification test requirements for the main steam safety valve of a million kilowatt nuclear power plant. Under the leadership of the leader, this meeting established an expert group to concretely implement the outline and the improvement of the test procedures, with a view to completing the localization of the main steam safety valve of a million kilowatt-class nuclear power plant as soon as possible.

Millions of kilowatts of nuclear power plant voltage regulator safety valve, main steam safety valve, main steam isolation valve is the difficulty and focus of China's nuclear power station valve localization, under the leadership of the National Energy Administration, under the coordination of industry associations and various engineering construction units With the active support, the localization of the main steam safety valve is currently advancing with great strides and is expected to be truly localized next year.