Spallation target of accelerator drive sub-critical reactor of low proton beam intensity efficient transmutation nuclear waste

Abstract

The invention discloses a spallation target of an accelerator drive sub-critical reactor of low proton beam intensity efficient transmutation nuclear waste, and relates to the technical field of nuclear energy. The spallation target is characterized in that reactor cores of the spallation target are arranged in a shape of a triangular grid, a proton beam (1), a liquid state heavy metal spallation target (2), a fission fuel region (3), an axial reflecting region (4), an axial shielding region (5), a radial reflecting region (6) and a radial shielding region (7) are sequentially arranged from center to outside. Based on the reactor cores adopting TRU dispersion metal fuels, the reactor physics principle and the spallation target physics principle are applied, and spallation target geometrical optimizing is carried out with the transmutation performance as evaluation indexes. Based on the optimized spallation target, in the state that structures and material component distribution of the reactor cores are not changed, the reactor cores of the spallation target can have the functions that the same transmutation performance is obtained in the fixed power operation mode, the proton beam intensity is reduced, energy gain factors of the reactor are improved, and the higher MA transmutation performance is obtained in the fixed proton beam intensity mode.

Description

technical field [0001] The invention relates to the technical field of nuclear energy, in particular to a spallation target design scheme of an accelerator-driven subcritical reactor for high-efficiency transmutation of nuclear waste with low proton beam current. Background technique [0002] Both the world and China are facing energy crisis and greenhouse effect. In response to this severe situation, countries all over the world attach great importance to the development of renewable energy and new energy and have carried out related research. After considering all relevant factors, nuclear energy has the least impact on the environment, and nuclear power plants can provide continuous power demand without being affected by the climate. In addition, nuclear fuel transportation and storage are convenient, power generation costs are stable, and nuclear power technology and industrialization are mature. It is recognized as the most promising primary energy that can replace fos...

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Problems solved by technology

But so far, no design optimization of spallation targets based on transmutation performance has been found, and TRU fuel has not been used in such related literatures related to the core.

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