Reactor core design method for improving reactivity and transmutation effect of homogeneous spent fuel solution transmutation reactor

Abstract

The invention discloses a reactor core design method for improving the reactivity and the transmutation effect of a homogeneous spent fuel solution transmutation reactor, which comprises the following steps: according to the component proportion of a plutonium isotope to a minor actinide in spent fuel, preparing reactor core spent fuel solution; determining the radius dimension of a reactor core, the arrangement material and the thickness of a reflecting layer, the heavy isotope concentration and the heavy isotope nuclide proportion; and calculating the critical performances of the reactor core under various reactor core parameters, wherein 100cm is selected to serve as the radius dimension of the reactor core; the height of the solution is 200cm, and light water of which the thickness is 10cm is adopted in the radial direction of the reactor core is used as the reflecting layer; 200g/L is selected to serve as the heavy isotope concentration; the ratio of 237Np/Pu is 0.26-0.52; and the light water is selected to serve as a moderator of the reactor core. The method disclosed by the invention can improve the reactivity of the reactor core, and is beneficial to burning more plutonium and obtaining more transmutation products.

Description

technical field [0001] The invention belongs to a core design method of a nuclear reactor, in particular to a core design method of a spent fuel solution transmutation reactor. Background technique [0002] The reprocessing of spent fuel is a key issue that puzzles the development of nuclear power in the world. At present, there are two ways of reprocessing spent fuel: one is the "one-pass" cycle; the other is the "reprocessing" cycle. The "one-pass" method means that the spent fuel is sent to deep geological formations for disposal or long-term storage as waste after cooling and packaging. Its advantages are low cost, simple concept, no high-purity plutonium, and low risk of nuclear proliferation, but the disadvantage is that waste The radioactivity and toxicity are high, and the duration lasts for hundreds of years, and there is no industrial operation experience. The "reprocessing" cycle is to separate and recycle 96% of the useful nuclear fuel contained in the spent fu...

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Problems solved by technology

For example, the Chinese patent application number 200810045716.8 "Solution reactor for plutonium incineration and neptunium-237 or americium-241 transmutati

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