Second-generation improved nuclear reactors will not be phased out prematurely

The Wall Street Journal said on the 5th that China may phase out the CPR1000 reactor earlier than planned. Before the accident at the Fukushima Daiichi nuclear power plant, China had planned to build dozens of such old-fashioned reactors based on French technology. However, a person in the Chinese nuclear power industry said during an interview with reporters that there is currently no indication that the second generation of improved units will be eliminated sooner.

According to the Wall Street Journal, the above reactor types lack some of the safety features of more advanced technologies. If the Fukushima Daiichi nuclear power plant possesses such a safety system, there could be no accident.

"It's hard to brake immediately"

The CPR1000 uses the second generation of improved PWR nuclear power technology from China Guangdong Nuclear Power. This technology uses the Lingao nuclear power plant as a reference power station, and the integrated localization rate is over 80%. At present, the four units of the first phase of the Liaoning Hongyanhe nuclear power plant adopt the CPR1000 technology program. The CPR1000 uses an active safety system that requires heat and power from the pump to the valve to drive the reactor.

“Although the country has identified the third generation of nuclear power represented by the AP1000 as a future technology line, there is no indication that the second generation plus units will be eliminated early.” One nuclear power industry source told the Morning Post reporter that the non-motivated group (No. Third-generation nuclear power plants do not require external emergency power supplies, relying on natural phenomena such as gravity, potential energy (high water tanks), natural circulation, and evaporation to drive cooling water to cool the reactors and containment vessels and take heat out. Compared to the second-generation unit, the safety factor is higher in extreme environments, but it is difficult for China to continue to apply the inertia of the second-generation improved unit.

"The domestic nuclear power equipment manufacturing enterprises, such as Dongfang Electric Group, China Yizhong Group, China Erzhong Group, Shanghai Electric, etc., are currently able to produce a complete set of second-generation improved unit equipment with a scale of approximately tens to twenty units." Said, "so many people, production equipment, investment in early investment, it can not be said to stop."

The government has not yet liberalized the approval of the new nuclear power unit. After this year's Fukushima nuclear power accident in Japan, China has frozen all new project approvals. The Wall Street Journal quoted industry management and legal experts yesterday as saying that a nuclear safety assessment report may be announced before the end of the year. When the assessment report is published, the approval of the new nuclear power plant project may be restarted.

When the “Nuclear Safety Plan” was issued was directly related to the introduction of the latest “Long Term Nuclear Power Development Plan”. According to the “China Energy News” report, after the “nuclear safety planning” consultations were completed and the “long-term development plan for nuclear power” was adjusted, the two plans are likely to be issued at the same time.

"The new nuclear power plant should choose three generations as much as possible"

After the Fukushima nuclear power plant's active safety system has been criticized, whether the newly approved nuclear power unit will use all three generations of nuclear power, represented by the AP1000, is also a core concern of the nuclear power industry.

“The issues here are complex and complicated. The future must be unified under the AP1000's route and require more intensive decision-making in the country.” said the nuclear power industry insiders said.

Economic efficiency is one of the advantages of China's second-generation nuclear power generators. Dai Jun, an analyst at UBS Securities China Equity Research, once told the Morning Post that the current U.S. and European nuclear power costs are generally in the range of 5,000 to 7,000 U.S. dollars per kilowatt, while China only needs about 2,000 U.S. dollars.

In order to emphasize that CPR1000 does not lag behind in security, there is room for upgrading in the future. China National Nuclear Power stated that the reactor type “meets the development law of nuclear power technology and can be smoothly connected with the third-generation nuclear power technology”.

According to available data, the CPR1000 is developed from the M310 reactor model of Areva (France). Most components of this model have made breakthroughs in localization, but the overall design technology and some major equipment ( For example, the intellectual property of the main pump is still in the hands of the French. If you want to export, you must obtain Areva authorization.

Regarding the technical dispute between the second and third generations, Zhang Guobao, former director of the National Energy Administration, stated in August this year that “the state’s attitude was very clear when introducing three generations of technology. The next three generations of technology should be the mainstream. Of course, the second generation plus is not to say one. No approval is needed. It needs to be treated as a transition. The new nuclear power plants should be selected from three generations as far as possible. Including the inland nuclear power plants, the 'roads' I gave were all approved in three generations.”

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