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Efficient nuclear waste evolution sub-critical reactor core based on mixed energy spectrum

A nuclear waste and subcritical technology, applied in the field of reactor cores, can solve problems affecting reactor safety, deterioration, and efficiency of control rods, etc., and achieve the effect of good transmutation effect, high safety, and simple structure

Inactive Publication Date: 2012-08-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reactor of this scheme belongs to the fast neutron reactor, if it is used for nuclear waste transmutation, it will make the dynamic parameters of the reactor (Doppler coefficient, cavitation coefficient, delayed neutron share, etc.) affect the safety of the reactor
Therefore, this solution is not suitable for nuclear waste transmutation

Method used

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  • Efficient nuclear waste evolution sub-critical reactor core based on mixed energy spectrum
  • Efficient nuclear waste evolution sub-critical reactor core based on mixed energy spectrum
  • Efficient nuclear waste evolution sub-critical reactor core based on mixed energy spectrum

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Embodiment Construction

[0027] Such as figure 1 As shown, the high-efficiency nuclear waste transmutation subcritical reactor core based on the mixed energy spectrum provided by the present invention, from the center of the radial direction outwards, are the outer neutron source region 1, the transmutation region 2, the moderating layer region 3, and the reflective layer region. 4 and shielding layer area 5. The core has a total height of 3.8m and a diameter of 3.5m, of which the active zone has a height of 1m and a diameter of 1.22m. Such as figure 2 As shown, the outer neutron source region 1 runs through the entire core, and is distributed from the transmutation region 2 to the upper and lower ends in the axial direction as a moderation layer region 3, a reflective layer region 4, and a shielding layer region 5 in order. The spallation neutron energy provided by the external neutron source is about 10 MeV. The external neutron source drives the fission reaction of the fuel in the transmutation z...

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Abstract

The invention relates to an efficient nuclear waste evolution sub-critical reactor core based on a mixed energy spectrum, comprising an external neutron source area, an evolution area, a slowing-down layer area, a reflecting layer area and a shielding layer area from the center to the outside in sequence; and as the slowing-down layer area and the reflecting layer area are arranged on the periphery of the evolution area, a neutron is sufficiently slowed down and then is reflected back to the evolution area to form a mixed energy spectrum, and the mixed energy spectrum is utilized to carry out evolution to sub-actinium-series nuclide (MA) and long-life fission products (LLFP) simultaneously. According to the invention, the mixed energy spectrum is formed by reasonable reactor core structure arrangement, a transuranium nuclide (TRU) fuel area and an LLFP fuel area are respectively arranged according to the distribution conditions of fast neutrons and thermal neutrons, and the two fuel areas adopt a same fuel assembly form, so as to realize evolution of the MA and the LLFP simultaneously in a same evolution area and in a same reaction core; the reactor core structure is simple, the neutron utilization rate is high, the function of efficient nuclear waste evolution is realized, and a liquid state lead-bismuth alloy is adopted as a cooling agent to take fission energy generated in the evolution area out of the reactor core to realize the capacity.

Description

Technical field [0001] The invention belongs to the technical field of radioactive nuclear waste treatment, and specifically relates to a reactor core for the transmutation of high-level nuclear waste. Background technique [0002] The issue of nuclear waste disposal, especially the final disposal of long-lived nuclear waste, is a worldwide problem. At present, no country has a definite disposal plan. With the rapid growth of the installed capacity of my country's pressurized water reactor nuclear power plants, the accumulation of nuclear waste will increase rapidly. These nuclear wastes have a long life and high radiotoxicity, posing long-term harm to the human environment. How to minimize waste, minimize the volume and radiotoxicity of high-level radioactive waste generated from the operation of nuclear power plants, and safely dispose of high-level radioactive waste, so that it can be reliably isolated from the biosphere for a long time, and ensure the environmental safety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/34
Inventor 陈钊陈忠汪卫华柏云清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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