Basic Fundamental Research
CLADS Basic Fundamental Research
Among the basic foundational research, applied research, and practical research toward the decommissioning work, CLADS is conducting basic foundational research that contributes toward the resolution of nuclear energy issues.
Introduction to basic foundational research
Development of a remote radiation imaging systemOne of the most important issues at reactor decommissioning sites inside the Fukushima Daiichi Nuclear Power Station (hereinafter referred to as 1F) building is reducing workers’ exposure dose.
In-core detection/ analysis technique using laser/ fiber opticsCurrently, the measurement and analysis of the in-core situation in the Fukushima Daiichi Nuclear Power Station (hereinafter referred to as 1F) is being performed using remote operation robots.
Elucidation of corrosion mechanism under radiation or air/solution environmentsThe previous assumption of corrosion of metals in nuclear reactors was based on pure water (light water) under normal operating conditions of the nuclear power station.
Environmental radioactive particlesThe main objective of this research theme is to protect persons from the environmental release of materials originating from the Fukushima Daiichi Nuclear Power Station (1F) accident.
Radiochemical analysis for investigation of processing and disposal of radioactive wastesFor decommissioning of the Fukushima Daiichi Nuclear Power Station (hereafter, 1F), safe and appropriate disposal of wastes generating from 1F accident is significantly important issue. Radioactive wastes are generated in regular operation of nuclear power plants.
Investigation of a technique for safely storing secondary waste generated by the processing of contaminated waterContaminated water with high concentrations of radionuclides are processed in a cesium adsorption tower and multi-isotype removal facility [hereafter, ALPS (Advanced Liquid Processing System) ].
- Development of a high dose-rate contamination distribution measurement method using fiber optics
- Development of environmental information presentation technology for remote operation support
- Development of α-ray imaging detectors
- Development of β-ray imaging detectors
- Development of a dust monitoring system
- Remote/non-contact material diagnosis/processing technology using lasers
- Experimental research focusing on BWR-specific core meltdown behavior
- Analysis and evaluation research on 1F accident progress
- Elucidation of control rod blade damage mechanism
- Elucidation of molten fuel solidification mechanism
- Construction of a Cs chemisorption model
- Development of direct measurement technique for the surface chemical state
- Equipment/device-based corrosion risk assessment
- Elucidation of aging mechanisms of fuel debris
- Elucidation of generation, transport, and the migration behavior of radioactive scattered fine particles
- Strategy for securing confinement and dosage assessment
- Prediction of dose-rate distribution within containment vessel
- Development of non-destructive measurement techniques used in fuel debris vessels
- Assessment of the hydrogen behavior
- Development of a technique for controlling the increase in hydrogen concentrations
- Development of a method to estimate radioactivity (inventory) contained in waste
- Development of a method to select a technique to safely solidify waste that has not been processed
- Investigation of a method to estimate changes in properties of secondary waste for which long-term storage is expected
- Investigation of disposal concepts to increase the achievability of disposing radioactive waste and understanding the impact of the characteristics of waste on their disposal