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Reactivity Control in Molten Salt Reactors

A reactor and molten salt technology, applied in the control of nuclear reactions, reactors, nuclear reactors, etc., can solve problems such as toxic, complex and expensive, and volatile metals

Active Publication Date: 2019-01-29
伊恩·理查德·斯科特
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cadmium is relatively easily reduced to metal, as described in GB2508537, but the resulting metal is volatile and toxic at the temperature of the coolant salt, thus requiring specialized operations, which are complex and expensive in the context of nuclear reactors

Method used

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  • Reactivity Control in Molten Salt Reactors
  • Reactivity Control in Molten Salt Reactors

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Embodiment Construction

[0015] It should be noted that, as stated in this document, the following terms have the following meanings which are standard in the chemical field:

[0016] Element: A single type of atom (when used to describe a component of a compound) or a chemical formed from a single type of atom (when used to describe a substance). Compound: A chemical comprising two or more different elements bonded together by electricity.

[0017] Substance: A chemical product that cannot be separated into its components by physical separation (ie, chemical bonds cannot be broken), such as compounds, alloys, or elemental substances, but does not include mixtures.

[0018] The reduction in reactivity of nuclear reactions may be for the purpose of temporarily controlling reactivity, eg to compensate for the desired reduction in initial high reactivity as fission proceeds, and for the purpose of total cessation of reactivity.

[0019] This can be achieved by adding neutron absorbing material to the co...

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Abstract

The invention discloses a method for controlling the reactivity of a molten salt fission reactor. The molten salt fission reactor comprises a core including fuel tubes (103) containing molten salt fission fuel and coolant tanks (101) containing molten salt coolant (102), wherein the fuel tubes are submerged in the coolant in the slot. The method includes the steps of dissolving a neutron absorbing compound including a halogen and a neutron absorbing element in a molten salt coolant. The first method also includes reducing a neutron absorbing compound to a salt of said halogen and an insoluble species comprising said neutron absorbing element, said halogen being fluorine or chlorine, wherein said insoluble species undergoes fission in said molten salt Non-volatile at the temperature of the molten salt coolant during operation of the reactor. In a second approach, the one or more neutron-absorbing compounds are selected such that the one or more neutron-absorbing compounds compensate for a decrease in neutron-absorbing capacity due to absorbing neutrons in the core The resistance is reduced to control the fission rate of the core. The invention also provides a device for implementing the method.

Description

technical field [0001] The present invention relates to the control of fission reactions in molten salt fission reactors. In particular, the present invention relates to a reversible approach to controlling neutron absorption rates in reactors. Background technique [0002] Molten salt fission reactors are reactors in which the fissile material is in the form of molten halide salts, usually chloride or acetyl fluoride. A novel design of such a reactor is described in GB2508537 in which molten fuel salt is held in tubes surrounded by a second molten salt acting as coolant. Control of the reactivity of such reactors has been proposed by using neutron-absorbing control rods or by adding neutron-absorbing materials europium fluoride or cadmium fluoride to the coolant salt, using a negative temperature coefficient of reactivity to allow high temperatures, Resulting in a subcritical state of the copper oxide rectifier. [0003] Both europium fluoride and cadmium fluoride have s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C1/03G21C1/14G21C7/04G21C19/31
CPCG21C1/03G21C1/14G21C7/04G21C19/31Y02E30/30G21C3/54G21C7/22G21C7/24G21C15/247
Inventor 伊恩·理查德·斯科特
Owner 伊恩·理查德·斯科特
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