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A thorium-based molten salt breeder reactor core

A breeder reactor and molten salt technology, applied in nuclear reactors, thermal reactors, non-uniform reactors, etc., can solve the problems of fast reactor technology such as difficult technology, long doubling time, large fuel loading, etc., to reduce the positive temperature reactivity effect , improve the proliferation performance, and save graphite materials

Active Publication Date: 2019-07-30
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

However, the moderation performance of fluorine salts is good, so that MSFR has a large fuel loading capacity, high cost, long doubling time of the reactor (more than 30 years), and the difficulty of fast reactor technology

Method used

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  • A thorium-based molten salt breeder reactor core
  • A thorium-based molten salt breeder reactor core
  • A thorium-based molten salt breeder reactor core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The high power mixed energy spectrum thorium-based molten salt breeder reactor core of this embodiment, such as figure 1 As shown, it includes an active area 1 and a reflective layer 2, the reflective layer 2 covers the active area 1, the active area 1 includes a neutron supply area 14 and a multiplication area 11, and the neutron energy spectrum peak value of the neutron supply area 14 is less than 10 -6 MeV, the neutron spectrum peak of the breeding region 11 is 10 -6 MeV~10 -3 MeV.

[0058] Such as figure 2 As shown, the reflective layer 2 is on the periphery of the active region 1 and at the upper and lower ends. The reflective layer 2 can also be divided into a radial reflective layer 21 and an axial reflective layer 22 . The radial reflection layer 21 surrounds the periphery of the active region 1 . The axial reflective layer 22 is divided into an upper reflective layer 23 and a lower reflective layer 24. The upper reflective layer 23 is located directly abo...

Embodiment 2

[0066] The structure of embodiment 2 is basically the same as embodiment 1, the difference is that, as Figure 9 As shown, the first power flattening region 12 is added to the active region 1 of the embodiment 2. The first power flattening zone 12 surrounds the neutron supply zone 14, the breeding zone 11 surrounds the first power flattening zone 12, and the neutron energy spectrum peak value of the first power flattening zone 12 is greater than 10 -3 MeV, with a fast neutron spectrum. The first power flattening area 12 can flatten the core power distribution and optimize the temperature reactivity coefficient. The first power flattening area 12 is arranged in the center of the core or between the neutron supply area 14 and the breeding area 11. The neutron energy The spectrum is a fast spectrum (the peak of the energy spectrum is located at an energy greater than 10 -3 MeV area, fuel graphite volume ratio 1:1.8~1:0.01). Control rods are placed within the power flattening a...

Embodiment 3

[0069] The structure of embodiment 3 is basically the same as embodiment 2, the difference is that, as Figure 10 As shown, the active region 1 also includes a first power flattening area 12 and a second power flattening area 13, the volume ratio of the fuel molten salt and graphite in the first power flattening area 12 is 1:1, and the second power flattening area Zone 13 is fuel molten salt, breeding zone 11 is adjacent to and surrounds first power flattening zone 12, first power flattening zone 12 is adjacent to and surrounds neutron supply zone 14, neutron supply zone 14 is adjacent to and surrounds second The power flattening area 13 , the second power flattening area 13 is located in the center of the active area 1 . According to the computer simulation results, through the cooperation of the first power flattening area 12 and the second power flattening area 13, the multiplication ratio is increased to 1.1, and the temperature reactivity coefficient is further optimized ...

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Abstract

The invention discloses a reactor core of a thorium-based molten salt breeder reactor. The reactor core comprises an active region and a reflecting layer, wherein the reflecting layer covers the active region; the active region consists of a fuel molten salt and an array of moderator grid cells made from graphite; the active region comprises a neutron providing region, a power flattening region and a breeding region; the power flattening region surrounds the neutron providing region; the breeding region surrounds the power flattening region. According to the reactor core of thorium-based molten salt breeder reactor, which is provided by the invention, through changing the volume ratio of the molten salt to the graphite in the moderator grid cells made from the graphite, the active region of the reactor core is divided into a plurality of regions mixed with thermal spectrums and fast spectrums; the breeding performance of the reactor is improved; through arranging the power flattening region, the replacement period of the graphite is prolonged to 10 years; the reactor is enabled to have a negative temperature reactivity coefficient; through arranging the axial breeding region, the breeding performance of the reactor can be further improved, and meanwhile, the thermohydraulic characteristic of the reactor is facilitated.

Description

technical field [0001] The invention relates to the field of molten salt reactor core design, in particular to a thorium-based molten salt breeder core. Background technique [0002] Molten salt reactor is the only reactor that uses liquid fuel among the six fourth-generation reactor candidates, and has its unique advantages in inherent safety, economy, nuclear proliferation prevention and sustainable development of nuclear fuel. On the one hand, the fuel of the molten salt reactor does not need to be manufactured like a traditional reactor, and on the other hand, it also has the function of a coolant. Fission occurs to generate heat, and at the same time, the heat is brought to the secondary circuit. [0003] Since the birth of the concept of molten salt reactor, the world's main conceptual design research of molten salt breeder reactor is mainly: the molten salt breeder reactor MSBR (Molten Salt Breeder Reactor) of the Oak Ridge National Laboratory in the United States, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C1/22
CPCG21C1/22Y02E30/30
Inventor 刘亚芬伍建辉严睿邹杨陈金根
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI