Metal-cooled reactor with mixed loading of multi-type fuel assemblies and management method

A fuel assembly and metal cooling technology, applied in the field of nuclear reactors, can solve the problems of low fuel economy and large loading of enriched uranium fuel, etc.

Active Publication Date: 2021-05-14
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a multi-type fuel assembly mixed-loaded metal cooling reactor, which uses natural uranium fuel to replace part of the enriched uranium fuel, so as to solve the problems of large enriched uranium fuel loading and low fuel economy faced by existing liquid metal cooling reactors. question

Method used

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  • Metal-cooled reactor with mixed loading of multi-type fuel assemblies and management method
  • Metal-cooled reactor with mixed loading of multi-type fuel assemblies and management method
  • Metal-cooled reactor with mixed loading of multi-type fuel assemblies and management method

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Embodiment 1

[0032] like Figure 1 to Figure 5 As shown, the multi-type fuel assembly mixed loading metal cooling reactor, the core structure of the reactor is an integral honeycomb regular hexagonal assembly channel, which contains 253 hexagonal channels, including 132 internal fuel assembly channels 6 (B Class A channels), 102 external fuel assembly channels 5 (Class A channels), 19 control rod assembly channels 7, the coolant flow rate of the external fuel assembly channels 5 (Class A channels) is about ), which is relatively low. The control rod assembly channel 7 is in the shape of "outer square inner circle", the inner diameter is 135mm, and the center-to-center distance between adjacent hexagonal channels is 139mm. The inner fuel assembly channel 6, the outer fuel assembly The wall thicknesses of channel 5 and channel 7 of the control rod assembly are both 2.0 mm. The internal fuel assembly passage 6, the external fuel assembly passage 5, and the control rod assembly passage 7 are ...

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Abstract

The invention discloses a multi-type fuel assembly mixed-loaded metal cooling reactor and a management method. The core structure of the reactor is an integral honeycomb-shaped regular hexagonal assembly channel, and the channel includes an internal fuel assembly channel, an external fuel assembly channel, and a control system. The rod assembly passage, the internal fuel assembly passage, the external fuel assembly passage, and the control rod assembly passage are provided with multiple cartridges of fuel assemblies in the axial direction, the external fuel assembly passage is arranged on the periphery of the internal fuel assembly passage, and the control rod assembly The channel is arranged crosswise with the internal fuel assembly channel, and the upper and lower ends of the internal fuel assembly channel are arranged with low-cost natural uranium fuel assemblies, and the middle is arranged with enriched uranium fuel assemblies. The invention solves the problems of large loading capacity, high enrichment degree and low utilization rate of the existing metal-cooled reactor core fuel.

Description

technical field [0001] The invention relates to the technical field of nuclear reactors, in particular to a multi-type fuel assembly mixed loading metal cooling reactor and a management method. Background technique [0002] The liquid metal cooling reactor adopts a closed fuel cycle. It has good development potential, high safety and economy in nuclear waste transmutation and nuclear fuel multiplication. It belongs to the IV generation advanced nuclear energy system. At present, relatively complete liquid metal cooled fast reactor solutions include: American sodium-cooled fast reactor SMFR, Japanese sodium-cooled fast reactor JSFR, Russian sodium-cooled fast reactor BN600, Chinese sodium-cooled fast reactor CFR600, Russian lead-based fast reactor SVBR-75 / 100. European lead-cooled fast reactor ELSY, etc. Since the liquid metal reactor uses strong neutron-absorbing stainless steel as the cladding material and fast neutron energy spectrum, the core requires a large amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C3/60G21C3/326G21C19/19
CPCG21C3/60G21C19/19G21C3/3265Y02E30/30
Inventor 夏榜样孙伟严明宇余红星柴晓明李松蔚李文杰
Owner NUCLEAR POWER INSTITUTE OF CHINA
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