Radial-power-flattened efficient nuclear waste transmutation subcritical core and design method thereof

Abstract

The invention relates to a radial-power-flattened efficient nuclear waste transmutation subcritical reactor core and a design method thereof. The reactor core sequentially comprises an outer neutron source region (1), a first transmutation fuel zone (2), a second transmutation fuel zone (3), a third transmutation fuel zone (4), a reflective area (5) and a shielded area (6) from the center outwards. The transmutation fuel zones of the reactor core are arranged in three zones; the reactor core is arranged in a triangular shape, and is subjected to principle design and analysis by analyzing coupled neutronics and thermal-hydraulic principles and using mathematical methods; and aiming at each transmutation zone, specific geometry layer arrangement is performed from inside to outside based on the design principles, so that the power distribution of the transmutation fuel zones can be flattened in the radial direction. The reactor core can utilize fast neutron transmutation TRU (Transuranic) generated by exogenous neutron, is high in neutron utilization, good in radial power flattening, high in power generation efficiency and simple in structure, and has the functions of safety and high efficiency in nuclear waste disposal and economy.

Description

technical field [0001] The invention belongs to the technical field of radioactive nuclear waste treatment, and in particular relates to a reactor core for transmutation of high-level radioactive nuclear waste and a design method. Background technique [0002] The disposal of nuclear waste, especially the disposal of minor actinides in spent fuel has always been a worldwide problem. With the rapid growth of my country's economy, the demand for energy, especially for nuclear energy, has increased sharply, which has led to the rapid growth of the installed capacity of pressurized water reactor nuclear power plants in my country, and the accumulation of nuclear waste has thus increased rapidly. According to the medium and long-term plan of my country's nuclear power, the installed capacity of my country's nuclear power operation will reach 40 million kilowatts in 2020, and the cumulative stock of spent fuel will reach about 10,000 tons by then, including about 100 tons of pluto...

AI Technical Summary

Problems solved by technology

[0005] In the ADS program studied internationally, due to the existence of external neutron sources, the radial neutron flux distribution of the subcritical core is uneven, resulting in the uneven radial power distribution of the subcritical core

In order to solve this problem, various countries have adopted the multi-layer fuel partition method to flatten the radial power of the subcritical core, but no research has been carried out on the geometric arrangement of the transmutation partitions, and the core based on this geometric arrangement has not been reported in the literature.

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