Search Results

JAEA Plans to Adjust Decommissioning Plan for Monju Fast Breeder Reactor

The Japan Atomic Energy Agency (JAEA) announced on August 21 that it plans to adjust the decommissioning plan for the Monju fast breeder reactor in Tsuruga City, Fukui Prefecture. Under the revised plan, the remaining neutron shielding layers and other components inside the reactor, along with 227 dummy fuel assemblies, will no longer be removed separately in the current phase as originally planned, but will instead be handled together during the subsequent reactor pressure vessel dismantling phase. Monju is currently in the decommissioning process. Previously, JAEA had planned to proceed with the removal of internal reactor components within the current fiscal year, but due to two equipment failures, the related work was temporarily suspended, and the overall schedule is expected to be delayed by approximately one year. As of May 25, 595 shielding layers and related components in the reactor...

2026-08-22

JAEA Develops 3D-Printed Disposable Aerosol Particle Size Classification Device

On July 30, 2026, the Japan Atomic Energy Agency announced the development of a palm-sized, 3D-printed disposable device named µSPLIT (micro splitter) that can separate airborne particles by particle size on-site and collect them onto filters for subsequent or direct measurement. The disposable classification and measurement device µSPLIT (left) separates aerosols by particle size through controlled intake flow rate, with particles collected on filters. (Right) The main unit can be directly connected to a radiation detector via a thin film. According to reports, µSPLIT measures approximately 12 cm × 3 cm × 3 cm and is integrally molded from transparent resin using stereolithography 3D printing technology...

2026-08-03