Dual travelling wave partition burning method for fast reactor fuels

Abstract

The invention belongs to a partition burning method for nuclear reactor fuels and in particular relates to a dual travelling wave partition burning method for fast reactor fuels. The method comprises the following steps of: partitioning a reactor core of a fast reactor, and constructing a reactor starting region on the axial middle part of the reactor core; constructing an ignition position on the axial middle part of the reactor core of the fast reactor; and when the reactor core is stably operated, forming partitioned dual travelling waves, namely two main combustion regions. By the method, the values of two power peaks of the reactor core can be weakened by 25 percent respectively compared with the value of a single travelling wave power peak, but the total power of the reactor core is increased by 50 percent; moreover, the axial power distribution of the reactor core is flattened; the partial power peak is reduced; the average power and the total power of the reactor core are enhanced; the economical efficiency and the safety of the reactor as well as capability of maintaining integrality of materials in the reactor are improved; and thermotechnical hydraulic power of the reactor core is optimized. The method is particularly applied to a large million-kilowatts-class fast reactor nuclear power station.

Description

Technical field [0001] The invention belongs to a self-zoning combustion method of nuclear reactor fuel, and in particular relates to a double traveling wave self-zoning combustion method of fast neutron reactor fuel. Background technique [0002] Fast neutron reactor (fast reactor) fuel self-zoning combustion methods include standing wave combustion and traveling wave combustion. Because the traveling wave combustion method can make fast reactors with unique advantages, some studies have been carried out abroad, such as the Institute of Atomic Furnace, Tokyo Institute of Technology, Japan, "Nuclear Science and Engineering" 2001, Issue 139, pages 306-317 "CANDLE: The new bum-up strateg" and "Annals of Nuclear Energy" 2008, Volume 35, pages 18-36, "Design research of smalllong life CANDLE fast reactor" disclose a single-wave self-zoning combustion method (called CANDLE combustion method) and TerraPower LLC in "TechnologyReview" 2009, Issue 2, pages 42-44 "Traveling-wave reactor" ...

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Problems solved by technology

This is not conducive to the long-term integrity of the core materials, and the improvement of the average power and total power of the core will also be limited by safety aspects

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