Here is a video of the safety demonstration test conducted on March 27, 2024. The test simulates a situation where the reactor cannot be actively cooled during operation at 100% power. You can see how the reactor power naturally decreases—without any operator intervention.

During last year’s summer internship, students participated in a role-play exercise focused on reactor selection, which helped them develop information literacy skills relevant to research and development. This year’s internship application deadline is July 11. Don’t miss it!

#Basic_Course_on_HTGR At the HTTR, part of the helium from the reactor flows through the auxiliary helium pipe to the auxiliary cooling system, which removes the decay heat after the scram, and to the helium purification system to maintain the purity of the helium.

#Basic_Course_on_HTGR #HTTR all mechanisms explained 4th: core support plate & lattice At HTTR, #the_core_support_plate & lattice supports in-core structure made of graphite, and are metallic structural material.

Tracking the Movement of Free-Surface Flows We have developed a method to improve the accuracy and stability of the particle method in order to more accurately track the movement of a fluid's free surface. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

#Basic_Course_on_HTGR #HTTR all mechanisms explained 5th: permanent reflector

Heat Transfer During Rapid Cooling of Reactor Pressure Vessels This study reviews existing heat transfer correlations for opposing mixed convection and evaluates their predictive performance against experimental datasets. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

Reduction of Photogrammetric Computation Load in Decommissioning Workspace Modeling We have been engaged in the R&D of a method to reconstruct location structures and shapes as 3D models from images, enabling efficient model generation. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

Analysis of Hydrogen Behavior as an Embrittlement Factor in Steel Materials We measure hydrogen released from defects and the surface at various temperatures, obtaining a thermal desorption spectrum to estimate hydrogen trapping states. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

Development of a Rapid Methodology to Estimate Terrestrial Soft Error Rate Neutrons from space cause temporary malfunctions in electronics. We developed a method to evaluate the occurrence rate using various neutron sources worldwide. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

Development of Test Methods for Evaluating the Mobility of UAS in GNSS-Denied Environment Drones are expected to operate in GNSS-denied environments. We developed a low-cost, simple test methods to evaluate their flight performance. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

Development of In Situ Visualization and Control Techniques for Large-Scale Nuclear Simulations Real-time visualization for supercomputer simulations was developed and successfully applied to pollution dispersion analysis. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

We held a side event at the #IAEAGC, sharing our innovative efforts to repurpose depleted uranium and spent fuels, and our support for nuclear human resource development. President TRAN (VINATOM) was invited to share VietNam’s expanding benefits of nuclear science and technology.

What is the Behavior of Metal Ions in Soil? We systematically analyzed radium ion adsorption on clay using molecular-scale experiments and first-principles calculations, aiding applications like radioactive waste disposal. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…

ANSTO and JAEA Confirmed the Partnership in the Field of Nuclear Science and Technology. jaea.go.jp/english/news/n…

Monthly, make HTGR step by step The ６th issue was published！ This month’s issue is side shielding block！

Measurement of Nano-Ice Crystals in Rapidly Frozen Aqueous Solutions by Neutron and Proton Spins Advancing cryopreservation requires understanding how cryoprotectants prevent ice growth. We used neutron scattering on hydrogen nuclei. #JAEA_RD_Navigator rdreview.jaea.go.jp/navi_en/rd_e20…