China Guangdong Nuclear Power Group (CNNC), headquartered in Shenzhen, released a news on the 22nd that the CGTC accident-tolerant fuel (ATF) candidate material formally entered the research reactor on the 21st for neutron irradiation test. This is a landmark event for China's accident-tolerant fuel research and development. Marking the ATF National Science and Technology Major Project led by China Guangdong Nuclear Power Industry has entered a new phase.
On the 21st, with the launch of the China Mianyang Research Reactor (CMRR) this year, the Candidate for ATF Materials formally began studying the heap neutron irradiation test, which is a key step in the R & D of accident-tolerant fuels and will be adopted Neutron irradiation is a good candidate for fault-tolerant fuel cladding and pellets, obtaining a large amount of precious in-pile performance data and providing strong support for subsequent research and safety review of the reactor.
ATF is the benchmark for international R & D of nuclear fuel technology, a major change in nuclear energy development over the past 60 years and is also the core area where nuclear energy giants in the United States, Japan, Europe and other countries are competing. Since the concept was put forward in 2012, ATF R & D After five years of rapid development, the fire from the stars has changed into a prairie fire potential.
China ATF started its research and development in 2015 by the China Guangdong Nuclear Power Corporation, a national science and technology major project led by China Guangdong Nuclear Power Corporation - 'Key Technologies for Fault-tolerant Incidents of Accidents' and joint research institutes and institutes such as Chinese Academy of Sciences, China Academy of Engineering Physics, Tsinghua University, Xi'an Jiaotong University, , Composed of ATF technology research and development of the national team has completed the conceptual design of ATF fuel and preliminary analysis and evaluation, is fully developed S2FTM (Super Safe Fuel) series of super-safety fuel.
According to the plan, CGN will replace the nuclear fuel material under the existing system step by step, using a new type of cladding and a new type of pellet into a combination of S2FTM series fuel assemblies. The new type of super-safe fuel can withstand serious accidents over a long period of time, Extend the non-intervention time under reactor accident conditions, greatly reduce the risk until the elimination of hydrogen explosions and significantly reduce the consequences until the elimination of cooling water accidents, and combine the passive safety system with the ultimate safety of light water reactors, which can be used for fuel replacement of active units , And can also be used in the design of fourth and more advanced nuclear energy systems. In addition, the new fuel can maintain or enhance operational performance under normal conditions.
