Cosmic-ray muons to help evaluate radioactive materials in nuclear fuel debris

Cosmic-ray Muons in Evaluating Radioactive Materials

A novel approach utilizing cosmic-ray muons has been developed to assess radioactive materials within nuclear fuel debris.

In 2011, a devastating earthquake and tsunami led to a core meltdown at Japan's Fukushima Daiichi Nuclear Power Plant, resulting in the formation of fuel debris containing mixtures of nuclear fuel and other materials.

A research team has demonstrated the potential of muon scattering tomography in evaluating nuclear materials in fuel debris. This method involves creating images by measuring the deflection of muons as they penetrate materials.

Muon scattering tomography is highly sensitive to high-atomic-number elements like uranium.

By developing a prototype muon scanner, the team successfully used muon scattering to assess nuclear materials in fuel debris, paving the way for safe handling and storage based on their radioactive content.

Author's summary: Cosmic-ray muons aid in assessing nuclear fuel debris.

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American Institute of Physics American Institute of Physics — 2025-10-15

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