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Transuranic fuel and its preparation method and transmutation method

A uranium fuel and fuel technology, applied in the field of transuranium fuel and its preparation, to achieve the effect of simple and feasible preparation and guaranteed safety

Active Publication Date: 2022-07-26
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects of the positive temperature feedback problem in the recovery and utilization of transuranium elements (TRU) in the prior art, the present invention provides a transuranium fuel and its preparation method and transmutation method

Method used

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  • Transuranic fuel and its preparation method and transmutation method

Examples

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Effect test

Embodiment 1

[0049] The transuranic fuel is used as the fuel of the liquid molten salt reactor and the liquid molten salt reactor is operated; wherein, the mole percentage of MA in the TRU of the transuranic fuel is 50%; the TRUF in the transuranic fuel is 50%. 3 The initial molar percentage of 0.134%; the volume ratio of transuranic fuel and graphite moderator 3 is 5%. Initially, the core temperature feedback was -2.7pcm / K. During operation, with the addition of TRUF 3 With a critical value of 1.0 to 1.01 for maintaining the core reaction, the energy spectrum becomes hard and the core temperature feedback becomes smaller.

Embodiment 2

[0051] TRUF in transuranic fuel 3 The initial molar percentage of 0.0844%; the volume ratio of transuranic fuel and graphite moderator 3 is 10%. Other conditions are the same as in Example 1. Initially, the core temperature feedback was -1.4pcm / K. During operation, with the addition of TRUF 3 With a critical value of 1.0 to 1.01 for maintaining the core reaction, the energy spectrum becomes hard and the core temperature feedback becomes smaller.

Embodiment 3

[0053] TRUF in transuranic fuel 3 The initial molar percentage of 0.0675%; the volume ratio of transuranic fuel to graphite moderator 3 is 15%. Other conditions are the same as in Example 1. Initially, the core temperature feedback was -0.81pcm / K. During operation, with the addition of TRUF 3 With a critical value of 1.0 to 1.01 for maintaining the core reaction, the energy spectrum becomes hard and the core temperature feedback becomes smaller.

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PUM

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Abstract

The invention discloses a transuranic fuel and its preparation method and transmutation method. The transuranic fuel includes a base salt and a fluorine salt of a transuranic element, wherein the transuranic element includes plutonium (Pu) and a secondary actinide (MA), and the content of the secondary actinide is not less than 50% . The transmutation method of the transuranic fuel includes using the transuranic fuel as the fuel of a liquid molten salt reactor and operating the liquid molten salt reactor. The preparation of the transuranic fuel is simple and feasible, and the transmutation method of the transuranic fuel realizes a better negative temperature feedback and ensures the inherent safety of the liquid molten salt reactor.

Description

technical field [0001] The invention belongs to the field of nuclear reactor engineering design, and in particular relates to a transuranic fuel, a preparation method and a transmutation method thereof. Background technique [0002] The current commercial reactor fuel cycle adopts the "one-time" pass-through method and solid fuel assemblies, the fuel utilization rate is low, and the content of highly radioactive transuranic elements (TRU) in the spent fuel is high, which is a major problem facing the long-term healthy development of nuclear energy. Recycling transuranic elements is one of the effective ways to reduce the current nuclear waste storage and realize the sustainable development of nuclear energy. Due to the high content of fissile elements (>50%) in TRU in spent fuel, it can be used as fuel for liquid molten salt reactors. Recycling TRUs from liquid molten salt reactors is one of the effective means. However, the fissionable elements (such as Pu239 and Pu241)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/54G21G1/02
CPCG21C3/54G21G1/02Y02E30/30
Inventor 邹春燕余呈刚伍建辉陈金根蔡翔舟邹杨
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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