Doped fuel-clad combination for transmutation

A fuel and cladding technology, applied in the field of nuclear engineering, can solve the problems of long half-life and inability to fully utilize fissile resources, etc., and achieve the effects of offsetting negative reactivity, reducing cost and difficulty, and increasing life span

Inactive Publication Date: 2018-12-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, spent fuel contains high levels of fissionable isotopes, and direct landfilling cannot make full use of these fissionable resources; in addition, because the half-life of some minor actinides in spent fuel is very long, whether the container that wraps spent fuel can withstand long enough time is uncertain

Method used

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  • Doped fuel-clad combination for transmutation
  • Doped fuel-clad combination for transmutation
  • Doped fuel-clad combination for transmutation

Examples

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Embodiment 1

[0031] The fuel rod of this embodiment is made of cylindrical U doped with long-lived minor actinides 3 Si 2 fuel and FeCrAl cladding, where U 3 Si 2 in fuel 235 The proportion of U is 4.9%, and the doped long-lived minor actinides are 237 Np, its mass percentage is 0.31%.

Embodiment 2

[0033] The fuel rod of this embodiment is made of cylindrical U doped with long-lived minor actinides 3 Si 2 fuel and FeCrAl cladding, where U 3 Si 2 in fuel 235 The proportion of U is 4.9%, and the doped long-lived minor actinides are 237 Np, 241 Am, 243 Am, 244 Cm and 245 Cm, the mass percentage of the sum of the five is 0.31%, and the mass ratio between the five is m ( 237 Np): m( 241 Am): m( 243 Cm): m( 244 Cm): m( 245 Cm) = 42:47:9:2:0.1.

[0034] The transmutation rate of embodiment 1 and 2 is calculated, and calculation result is listed in the following table 1:

[0035] The transmutation rate calculation result of table 1 embodiment 1 and 2

[0036]

[0037] Calculations show that the loaded long-lived minor actinides can be reduced by transmutation while maintaining the same lifetime length as the existing fuel-cladding combination. The transmutation rates of non-transmutation reactors are all less than 0, so it can be seen that the doped accident-to...

Embodiment 3

[0039] The fuel rod of this embodiment is made of cylindrical U doped with long-lived minor actinides 3 Si 2 Fuel and SiC cladding constitute, where U 3 Si 2 in fuel 235 The proportion of U is 4.9%, and the doped long-lived minor actinides are 237 Np, its mass percentage is 0.7%.

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Abstract

The invention relates to a doped fuel-clad combination for transmutation. The doped fuel-clad combination for transmutation comprises a doped fuel and a clad, the clad is coated on the outside of thedoped fuel, and the doped fuel is a fuel doped with long-life minor actinides nuclide. The long-life minor actinides nuclide in the doped fuel is converted into short-life or stable nuclide in a neutron field, so that the cost and difficulty of final treatment of spent fuel, and long-life minor actinides nuclide processing problem can be solved. The clad is used to ensure the safety of the fuel inthe event of an accident and to counteract the negative reactivity caused by the transmutation. The combination can also achieve the effect of increasing the length of the fuel life of a reactor by doping the long-life minor actinides nuclide with lower concentration in the accident-tolerant fuel.

Description

technical field [0001] The invention relates to the technical field of nuclear engineering, in particular to a doped fuel-cladding combination capable of transmuting minor actinide nuclides. Background technique [0002] With the rapid growth of our country's economy, the demand for energy has greatly increased, especially after the signing of the Paris Agreement, the development of green energy has become a top priority. Nuclear energy is characterized by high efficiency, cleanliness and stability, which meets my country's energy needs. In recent years, my country's pressurized water reactor nuclear power plants have grown rapidly, but the accumulation of spent fuel has also increased rapidly. These spent fuels have a long lifespan and high radiotoxicity, threatening the human living environment for a long time. [0003] Spent fuel disposal issues, especially minor actinide nuclides with long half-lives in spent fuel 237 Np, 241 Am, 243 Am, 244 Cm and 245 The problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C3/07G21F9/36
CPCG21C3/07G21F9/36Y02E30/30
Inventor 袁岑溪陈胜利
Owner SUN YAT SEN UNIV
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