Method, device and apparatus for measuring plutonium mass of plutonium substance, and medium

Abstract

The embodiment of the invention provides a method, device and apparatus for measuring plutonium mass of a plutonium substance, and a medium. The method comprises the following steps of: 1, obtaining the characteristic information of each plutonium standard sample in a plurality of plutonium standard samples, and the second plutonium isotope abundance and second 241Am isotope abundance of a to-be-measured plutonium substance; each plutonium standard sample and the to-be-measured plutonium substance are measured; based on the first plutonium isotope abundance and the first 241Am isotope abundance in each piece of characteristic information, the first total neutron counting rate and the first coincidence neutron counting rate of each plutonium standard sample, and a first preset parameter, the third coincidence neutron counting rate of each plutonium standard sample is obtained; a scale curve is obtained based on the third coincidence neutron counting rate and the first equivalent 240Pueff mass of each plutonium standard sample; and according to a second total neutron counting rate, the second coincidence neutron counting rate, the scale curve, the second plutonium isotope abundance,the second 241Am isotope abundance and the first preset parameter, the plutonium mass of the to-be-measured plutonium substance is determined, and measurement precision can be improved.

Description

technical field [0001] The invention relates to the technical field of nuclear security, in particular to a plutonium mass measurement method, device, equipment and computer-readable storage medium for plutonium substances. Background technique [0002] Non-destructive analysis techniques are widely used in the fields of nuclear security and safeguards. Neutrons are relatively penetrating, not easily shielded, and usually enable bulk measurements of the sample. Therefore, neutron analysis technology is very suitable for measuring medium, high density, and bulky samples, and plays an irreplaceable role in non-destructive measurements in the field of nuclear security and nuclear safeguards. Among them, the coincidence neutron measurement method is one of the non-destructive analysis techniques, which is widely used in nuclear security. [0003] Generally, by measuring the plutonium standard sample, the neutron count rate and the equivalent 240 P Ueff The scale curve betwee...

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Problems solved by technology

[0004] Ideally, a neutron count rate corresponding to the equivalent 240 P Ueff There should be a linear relationship between the mass, but in fact, due to the influence of neutron multiplication, the calibration curve is nonlinear, which makes the measurement result of plutonium mass have a large error

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