Method for plutonium bearing material quality analysis

By establishing a computational model through MCNP simulation and using a neutron counting module to calculate the amount of material in the mixing hopper, the problem of inaccurate material quality measurement under complex conditions is solved, and real-time measurement and safe storage are realized.

CN118918996BActive Publication Date: 2026-06-05CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Filing Date
2024-07-23
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing non-destructive analysis techniques for nuclear materials cannot effectively measure the detection efficiency when the mass of materials changes under complex conditions, resulting in inaccurate measurements.

Method used

A computational model was established using MCNP simulation. The amount of material in the mixing hopper was calculated using the neutron counting module. The material quality was analyzed using the detection efficiency library of the neutron counting module, including the neutron count ratio C value of the horizontal and inclined detection modules, and the material quality was calculated.

Benefits of technology

It enables real-time measurement of material quantity under special conditions, with a measurement deviation of less than 10%, meeting process production and safety requirements, and supporting normal canning and transfer storage of materials.

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Abstract

The present application relates to a kind of plutonium-containing material quality analysis method, by the following steps: the calculation model of measurement object is established, the detection efficiency when loading different material amount is simulated by MCNP, the detection efficiency library of material spontaneous fission neutron under the calculation model is calculated;The detection efficiency of neutron counting module corresponding to different C value is calculated and verified, and the detection efficiency Ξ΅ of corresponding neutron counting module is judged according to the C value when loading material;The total number of neutrons S of neutron counting module, the detection efficiency Ξ΅ of neutron counting module is used to calculate the material quality m loaded in mixing funnel.The method provided by the present application can be used to quickly monitor the material content in mixing funnel using neutron analysis method under the condition that the process is basically stable, obtain the material content in mixing funnel, to realize real-time measurement of material quantity under special conditions, and the measurement deviation is less than 10%, meet the normal operation and safety requirement of process production, can realize normal filling and transfer storage of material.
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