Dyadic slowing type high energy neutrons dosimeter

A technology of neutron dose and high energy, applied in the direction of neutron radiation measurement, instruments, measuring devices, etc., can solve problems such as design structure differences

Inactive Publication Date: 2012-03-14
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But they belong to single moderator and single counter (detector) or single moderator and multi-counter design measurement mode without adding metal layer, have obvious differences with the design structure of single moderator and multi-counter in the application of the present invention

Method used

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  • Dyadic slowing type high energy neutrons dosimeter
  • Dyadic slowing type high energy neutrons dosimeter
  • Dyadic slowing type high energy neutrons dosimeter

Examples

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Embodiment Construction

[0021] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0022] combine figure 1 and figure 2 , the composition of the binary moderation neutron dosimeter includes a moderator sphere 1 and a neutron dosimeter binary design of multiple detectors, a moderator sphere 1 is equipped with multiple detectors, and multiple detectors The detector is divided into two counting units (binary for short), which are respectively called the central counting area 2 and the peripheral counting area 3; one detector can be placed in the central area, and multiple detectors can be placed in the moderating sphere according to the method of equal solid angles in the peripheral area. On a spherical surface with a certain radius in the body; the moderator ball 1 is made of a material rich in hydrogen, which has a good moderation effect on neutrons, such as polyethylene, and a certain thickness of heavy metal layer is added between the two uni...

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Abstract

The invention provides a binary moderating high-energy neutron dosimeter, which comprises a moderating sphere (1). Detectors are arranged in the moderating sphere; and each detector is divided into two counting units, namely a central counting zone (2) and a peripheral counting zone (3), wherein the central zone counting zone is provided with a detector, and the peripheral counting zone mounts a plurality of the detectors on the spherical surface with certain radius in the moderating sphere according to an equal spatial angle method. A heavy metal layer (4) is added between the two units. Thedosimeter can solve the problem of non-ideal energy response of the prior high-energy neutron dosimeter, and has the advantages of convenient use, light weight, good angle response, improved energy response and so on.

Description

(1) Technical field [0001] The invention relates to a high-energy neutron dose measuring device applied to nuclear technology. (2) Background technology [0002] The current domestic neutron ambient dose equivalent represented by BH3105 (H * (10)) The rate meter uses a single moderator bulb single thermal neutron sensitive counter as a probe, and the neutron energy of this type is within 10 -6 In the range of -1MeV, the measured ambient dose equivalent (H * (10)) is overestimated by a maximum of 6 times; while the neutron energy is less than 10 -6 MeV and measured H between 6-10MeV * (10) is overestimated, the maximum overestimation can be less than one-sixth, when the neutron energy is greater than 10MeV, the overestimation is more serious. The energy limit of the improved BH3105D neutron dosimeter for measuring high-energy neutrons has been extended to 100 MeV, and its weight can reach more than 20 kilograms, and their H * The energy response of (10) is also unsatisfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T3/00
Inventor 李桃生乐智希宫存溃郑玉宏颜强焦南杰
Owner HARBIN ENG UNIV
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