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Reactor core with high fast neutron fluence

A fast neutron and fluence rate technology, applied in the direction of moderator/core structure, reactor, nuclear power generation, etc., can solve the problems of limiting core power density and neutron fluence rate level, and achieve enhanced irradiation Capability and application range, high practical value, effect of high irradiation capability

Active Publication Date: 2013-12-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the JHR reactor, the lower U-235 enrichment, fuel core uranium density and coolant flow rate limit the core power density and neutron fluence rate level of the domestic test reactor

Method used

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  • Reactor core with high fast neutron fluence
  • Reactor core with high fast neutron fluence
  • Reactor core with high fast neutron fluence

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, the high-fast neutron fluence rate core of the present invention includes a cobalt target 1, a seven-layer fuel assembly 2, a medium irradiation tunnel 3, a control rod assembly 4, a beryllium assembly 5, a large irradiation tunnel 6 and a small irradiation tunnel. According to the hole 7; the seven-layer fuel assembly 2 is a hexagonal casing type fuel assembly, and 42 seven-layer fuel assemblies 2 are arranged in a compact ring, and there are 6 seven-layer fuel assemblies 2 on the innermost ring. A fast neutron trap is formed in the center, and a small irradiation hole 7 is arranged in the fast neutron trap, and a higher fast neutron fluence rate can be obtained in the small irradiation hole 7; it is next to the seven-layer fuel assembly 2 There are several hexagonal beryllium components 5 arranged outside the annular area, and the beryllium components 5 are used as moderators and reflectors to form an inverted neutron trap; several large irr...

Embodiment 2

[0035] Such as figure 2 As shown, the high-fast neutron fluence rate core of the present invention includes a cobalt target 1, a seven-layer fuel assembly 2, a medium irradiation tunnel 3, a control rod assembly 4, a beryllium assembly 5, a large irradiation tunnel 6, a small irradiation tunnel According to the hole 7 and the four-layer fuel assembly 28; the seven-layer fuel assembly 2 and the four-layer fuel assembly 28 are all hexagonal casing fuel assemblies, and 39 seven-layer fuel assemblies 2 and three four-layer fuel assemblies 28 are annular and compact Arrangement, three seven-layer fuel assemblies 2 and three four-layer fuel assemblies 28 are arranged at intervals on the innermost ring, and a fast neutron trap is formed in the center of the ring area, and a small neutron trap is arranged in the fast neutron trap Irradiation tunnel 7, a higher fast neutron fluence rate can be obtained in the small irradiation tunnel 7; several hexagonal beryllium assemblies 5 are arr...

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Abstract

The invention belongs to the technical field of nuclear reactor design, and in particular relates to a reactor core with high fast neutron fluence. The reactor core consists of fuel assemblies, control rod assemblies and beryllium assemblies. The plurality of fuel assemblies are hexagonal sleeve type fuel assemblies and in annular compact arrangement; six fuel assemblies are arranged on an innermost ring to form a fast neutron trap at the center of the annular region; the plurality of hexagonal beryllium assemblies are arranged close to the external side of the annular region of the fuel assemblies to form an inverted neutron trap; and the plurality of control rod assemblies are arranged among the fuel assemblies at intervals and in two rows and two columns in a squared shape. The reactor core with high fast neutron fluence satisfies internationally restricted U-235 enrichment degree and requirements of domestic fuel core production and design of coolant flow velocity, and can obtain high fast neutron fluence level in an irradiation tunnel, and enhance and widen irradiation capability and scope of application of a test reactor.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor design, and in particular relates to a high-fast neutron fluence rate reactor core. Background technique [0002] The development of nuclear power engineering is inseparable from nuclear reactors, and the development of nuclear reactors is inseparable from test reactors. The test reactor plays a very important role in the development of various reactor types. The development trend of modern test reactors is to have high thermal neutron or fast neutron fluence rate and a large number of experimental channels, including a certain number of large-sized channels. An important goal pursued by the advanced test reactor design is a high fast neutron fluence rate. The higher the fast neutron fluence rate in the pile, the shorter the time required for the material irradiation test. For example, the fusion reactor is one of the most promising energy sources in the future, and the materials used i...

Claims

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Application Information

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IPC IPC(8): G21C5/00G21C5/02
CPCY02E30/30
Inventor 王连杰黄世恩魏彦琴夏榜样于颖锐李庆
Owner NUCLEAR POWER INSTITUTE OF CHINA
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