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Sampling type fission ionization chamber and fission total number measuring method based on same

An ionization chamber and electrical connection technology, which is applied in the field of fission ionization chamber, can solve the problem of great impact on the health of measurement personnel, poor measurement uncertainty of ionization chamber neutron energy spectrum consistency, inability to measure gas fission products and short-lived fission products and other problems, to achieve the effect of reducing the radioactive dose and reducing the radioactive dose

Pending Publication Date: 2020-07-03
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

[0009] The purpose of the present invention is to provide a pumping type fission ionization chamber and a method for measuring the total number of fissions based on it, so as to solve the problem of self-shielding and neutron energy spectrum consistency in the ionization chamber when the existing double-fission ionization chamber is used to measure the fission yield. , leading to the introduction of large measurement uncertainties, as well as the inability to measure gas fission products and short-lived fission products, and technical problems that have a greater impact on the health of measurement personnel

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  • Sampling type fission ionization chamber and fission total number measuring method based on same
  • Sampling type fission ionization chamber and fission total number measuring method based on same
  • Sampling type fission ionization chamber and fission total number measuring method based on same

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0062] see figure 2 and image 3 , a pumping-type fission ionization chamber of the present invention, comprising a cathode support 2 and a cathode 3 arranged coaxially and fixedly connected sequentially from bottom to top, an anode support 1 arranged in the cavity of the cathode 3 and coaxial with the cathode 3, and further comprising The sampling anode 9, the ring anode 10, the sampling cathode sleeve 1701, the balance cathode sleeve 1702, the sampling anode column 15, the balance anode column 16 and the working gas introduction unit. The above-mentioned cathode 3 is detachably connected by an upper part and a lower part, enclosing a chamber. In this embodiment, the cathode support 2 is preferably cylindrical; the upper part of the cathode 3 is a cylindrical upper cover, and the lower part is a circular bottom plate, and the above-mentio...

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Abstract

The invention relates to a fission ionization chamber, in particular to a sampling fission ionization chamber and a fission total number measuring method based on the same. The problems that when an existing ionization chamber is used for measuring the fission yield, due to the fact that the ionization chamber has self-shielding and is poor in neutron energy spectrum consistency, large measurementuncertainty is introduced, gas fission products and short-life fission products cannot be measured, and the influence on the health of measuring personnel is large are solved. The ionization chamberis characterized by comprising a cathode support, a cathode and an anode support, wherein the cathode support and the cathode are coaxially arranged in sequence from bottom to top, and the anode support is arranged in an inner cavity of the cathode and is coaxial with the cathode. An annular sealing boss and an isolation boss are arranged on the lower bottom surface of the anode support. The sealing boss is positioned on the outer side of the isolation boss. The lower end surface of the sealing boss is hermetically and fixedly connected with the bottom inner surface of the cathode. A gap is formed between the lowermost end of the isolation boss and the inner surface of the cathode bottom. The sampling anode and the annular anode are attached to the lower bottom surface of the anode support, and the sampling anode is located in the isolation boss. The annular anode is located between the isolation boss and the sealing boss.

Description

technical field [0001] The invention relates to a fission ionization chamber, in particular to a pumping type fission ionization chamber and a method for determining the total number of fissions based on the fission ionization chamber. Background technique [0002] The probability that nuclear materials such as uranium, plutonium, and neptunium undergo unit fission to produce fission product A is called the fission yield of A. Generally speaking, there are certain differences in the fission cross section and fission yield under different neutron fields. When developing advanced nuclear devices such as nuclear reactors, the relationship between fission yield and neutron energy is an important factor in the determination of fission burnup. Base. The determination of fission yield needs to measure the total amount of fission products and the total amount of fission of nuclear materials simultaneously. For the measurement of the total amount of fission products, beta measureme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/14G01T1/185
CPCG01T1/185H01J49/147
Inventor 余功硕李雪松师全林王玉凤凡金龙张强张小林姜文刚
Owner NORTHWEST INST OF NUCLEAR TECH
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