Method for Non-Destructive Elemental Analysis of Large-Volume Samples and Device for Implementation

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a method and apparatus for non-destructive elemental analysis of large samples using pulsed fast neutron irradiation. The technique measures gamma radiation emitted by the sample after irradiation, allowing for accurate identification and quantification of chemical elements present without altering or damaging the sample. The method uses the gamma emission from a known sub-region of the sample (such as a metallic container) to directly determine the neutron flux at the sample location, improving accuracy and reducing computational effort. The associated device includes a sample chamber surrounded by a neutron-reflecting material like graphite to enhance neutron utilization and measurement reliability.

Use CasesContent extracted from patent full text and abstract with AI.

• Analysis of hazardous waste drums to identify and quantify toxic or radioactive elements without opening the container.
• Routine screening of industrial materials or recycling streams for metal content and contaminants.
• Quality control and verification of incoming or outgoing shipments in recycling, mining, or waste management industries.
• Non-destructive verification of stored nuclear materials or spent fuel for regulatory compliance and safety.
• Identifying protected or valuable elements (e.g., rare earths, platinum group metals) within scrap or complex mixtures.

BenefitsContent extracted from patent full text and abstract with AI.

• Non-destructive analysis preserves the integrity of large samples, avoiding the need to open or physically alter them.
• Direct measurement of neutron flux in-situ increases quantification accuracy and reduces reliance on complex simulations.
• Suitable for high-throughput and routine analysis, supporting efficient industrial or regulatory workflows.
• Enhanced identification and quantification of elements, including inhomogeneously distributed or shielded inclusions within the sample.
• Minimized exposure risk for personnel handling hazardous waste or unknown materials.
• Improved signal reliability and reduced measurement error due to optimized chamber and detector design.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention relates to a method for the nondestructive element analysis of large-volume samples using neutron radiation and to a device for carrying out the method. In the method according to the invention, the sample is irradiated with fast neutrons in a pulsed manner and the gamma radiation emitted by the sample is measured. The amount of an element that is contained in the sample is evaluated after the base signal is subtracted from the area of the photopeak that the element causes in a plot of count rate versus energy. According to the invention, the gamma radiation emitted by a sub-area of the sample, the composition of which is known, is evaluated in order to determine the neutron flux at the location of the sample. For example, a metal enclosure of the sample, such as a standard waste barrel, can be selected as such a sub-area. A novel evaluation technique on the basis of multi-parameter analysis can quantify the presence of individual elements therefrom more quickly and more accurately than the prior art. The device is characterized by a sample chamber that is surrounded by a neutron-reflecting material, in particular graphite.