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Method of controlling mass fraction of uranium-235 isotope in gas phase of uranium hexafluoride and measuring system for implementation of the method

A uranium hexafluoride, mass fraction technology, applied in the field of nuclear material analysis, to prevent system inaccuracy and reduce the possibility of

Inactive Publication Date: 2006-07-05
ОТКРЫТОЕ АКЦИОНЕРНОЕ ОБЩЕСТВО «СИБИРСКИЙ ХИМИЧЕСКИЙ КОМБИНАТ»
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Problems solved by technology

Conceivably, the estimation of the uranium-235 mass fraction control in gas streams with stable isotope concentrations is sufficient, but given methods for technical control of cascade facilities and for tracking transient processes in real time patterns at the plant, or for sources from The effective response to sudden deviations in the isotope concentration of the fixed boundary is absolutely unacceptable

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  • Method of controlling mass fraction of uranium-235 isotope in gas phase of uranium hexafluoride and measuring system for implementation of the method
  • Method of controlling mass fraction of uranium-235 isotope in gas phase of uranium hexafluoride and measuring system for implementation of the method
  • Method of controlling mass fraction of uranium-235 isotope in gas phase of uranium hexafluoride and measuring system for implementation of the method

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Embodiment Construction

[0054] The system includes a measurement chamber 1 with 3 pipes for the injection 2 and discharge of uranium hexafluoride from the gas collector 4 of the cascade plant with a restriction device 5; a detection module 6; corresponding temperature 7 with adapters 9 and 10 And pressure 8 sensors; controller 11 with discriminator 12-14, electric pulse counter 15-17, gamma spectrum analyzer 18 and timer 19; internal data line 20; data acquisition control and processing module 21; external interface network 22 ; The network 23 controlled by the cascade facility; the reference measuring device 25 (mass spectrometer) is connected to the network 23 through an external interface network.

[0055] In the control system (see FIG. 2), the controller 11 with blocks 12-19 is manufactured in the form of a single-board energy spectrum measuring device 26.

[0056] The control method is implemented as follows. The measurement chamber 1 is connected in parallel with the cross section of the gas colle...

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Abstract

The invention relates to nuclear material analysis by radiation methods and can be used for on-line monitoring uranium hexafluoride enrichment in isotopic dividing production. The uranium-235 gamma-radiation intensity, the temperature and the pressure of uranium hexafluoride are determined by means of averaged measurement results within identical time intervals when a current time is changed at a value equal to the time segment of the time interval. The calculated value of the uranium-235 mass fraction is referred to the current time in coincidence with the measuring time interval. The invention also discloses a control system of the method, wherein at least three descriminators and a timer are mounted in a controller, the output end of the descriminator is connected with the input end of a gamma emission detector, each output end of the descriminators is connected with the input end of single electrical impulse counter.

Description

Technical field [0001] The invention relates to nuclear material analysis by means of a radiation method, and can be used for on-line monitoring of uranium hexafluoride enrichment in a gas stream produced by isotopic separation of uranium. Background technique [0002] The term "uranium enrichment" generally refers to (defined as) the atomic fraction or mass fraction (concentration) of the uranium-235 isotope in a uranium isotope mixture expressed as a percentage. Small differences in definitions are irrelevant to this technical control. [0003] The method used to control uranium enrichment is based on the indirect method. In the indirect method, the ratio of the following previously known functions is based on a certain mass fraction C 5 Some associated value X i The measurement results to estimate the uranium-235 content: [0004] C 5 =f(X 1 , X 2 ,...) (1) [0005] Where X 1 , X 2 ,...Represent the recorded analysis signal and the physical constant or perma...

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Application Information

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IPC IPC(8): G21C17/06G01N23/00G01N23/06G01N33/00
CPCG01N23/066G01N33/0055G01N23/095
Inventor 安得雷・弗拉季斯拉沃维奇・阿布拉莫维奇维克托・瓦西里耶维奇・沃多拉佐斯基弗拉基米尔・叶夫根尼耶维奇・格罗霍夫迪米特里・弗拉基米尔维奇・多罗费耶夫朱里・维克托维奇・日林伊科博里斯・米哈伊洛维奇・济明维亚切斯拉夫・米哈伊洛维奇・伊柳科因弗拉基米尔・伊万诺维奇・马津弗拉基米尔・伊万诺维奇・罗施普金尼古拉・尼古拉耶维奇・西多连科朱里・博里斯维奇・托尔格那科夫
Owner ОТКРЫТОЕ АКЦИОНЕРНОЕ ОБЩЕСТВО «СИБИРСКИЙ ХИМИЧЕСКИЙ КОМБИНАТ»
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