Persistent Quest -
Research Activities  2005

Contents

Preface
1 .  Research and Development of Innovative Nuclear Reactors
1.1 Hydrogen Production and Electricity Generation Using Heat from a Very High Temperature Reactor (VHTR)
- Hydrogen Production from Water by the IS Process, Electricity Generation by Gas Turbine -
1.2 Recycling of Plutonium Based on LWR Technology
- R&D of Innovative Water Reactor for Flexible Fuel Cycle (FLWR) -
1.3 Large-Scale Numerical Simulations of Complex Two-Phase Flow Behavior
- Development of an Advanced Thermal Design Method by Simulations Only -
1.4 Valve to Connect the HTGR and Hydrogen Production System
- Development of High-Temperature Isolation Valve to Connect the HTTR to the Hydrogen Production System -
2. Nuclear Fusion Research and Development
2.1 Experimental Evidence of Zonal Flow
- Simultaneous Measurement of Electrostatic Potential and Density Fluctuation by a Heavy Ion Beam Probe -
2.2 Why Can't Negative Current be Driven in a Tokamak?
- The Mystery, "Current Hole" -
2.3 JT-60 Succeeds in Long Sustainment of High Pressure Plasma
- This Achievement Contributes to the ITER Advanced Operation -
2.4 Measurement of Tritium Depth Profile in Matter Using a Nuclear Reaction
- Absolute Measurement of Hydrogen Isotope Depth Profile Using Ion Beam Nuclear Reaction Analysis -
2.5 Transmission Electron Microscopies of Carbon Deposition Layers Formed in Tokamak
2.6 Rocket-Launch by Microwave Beamed Propulsion Energy
- Application of High Power Gyrotron to Space Technology -
2.7 Separation and Recovering of PFCs by Continuous Circulation Gas Chromatography
- Application of Fusion Fuel Recycling Technology to the Environmental Field -
3. Nuclear Safety Research
3.1 Evaluation of gamma-ray Dose Components in Criticality Accidents
- Providing Accurate Criticality Accident Dosimetry -
3.2 Post-Irradiation Examination(PIE) Technology Contributing to Improve LWR Fuel
- Measurement Technique of Fission Gas Release from Fuel Pellet -
3.3 Development of a Dose Assessment Method Using a Tooth Sample
- Dose Can Be Assessed Even without Dosimeter Data -
4. Neutron Science Research
4.1 Development of a Few Microsecond Beam Interrupting Module
- Fast-Response Interlock System for J-PARC -
4.2 Developing Technology for Transmutation of Minor Actinides
- Validation of Cross Section Data of Actinide Nuclides -
4.3 Development of a 187Re-187Os Nucleo-Cosmochronometer by Using Neutrons from Nuclear Reactors
- Measuring the Ages of Stars and Meteorites -
4.4 Study of the Structure of Burning Ice Using Neutrons
- Temperature Dependence of Crystal Structure of Methane Hydrate -
5. Research on Advanced Photon and Synchrotron Radiation Sciences
5.1 Discovery of Evidence of Nucleosynthesis by Photon-Induced Reactions in Supernova Explosions
- Evidence of the Stellar Origin of Heavy Elements -
5.2 Close Relationship between High TC Superconductivity and Lattice Vibration
- A Step towards Understanding These Mechanisms -
5.3 Site-Specific Lattice Vibration States Observed by Nuclear Resonant Scattering
5.4 Development of Soft X-ray (1-keV Region) Polarizer Using a Mica Crystal
6. Research for Radiation Applications Using Charged Particles and Radioisotopes
6.1 Irradiation of Mammalian Cells with Single Heavy Ion
6.2 Sterol Composition Determines Petal Shape
6.3 From Leaf to Stem, Root, and Fruit
- Quantitative Modeling of Photoassimilate Transport in a Plant Using the Positron Emitting Tracer Imaging System -
6.4 Electricity Production through the Use of Polymer Electrolyte Membranes
- Development of Fuel-Cell Membranes Operating at High Methanol Concentrations -
6.5 Formation of a Gaseous Ion Nanobeam with Tens of keV Using a New Focusing Lens System
7. Advanced Science Research
7.1 Mysterious Ordering in Neptunium Dioxide
- A Mystery for Half a Century Is Addressed Using Advanced Experimental and Theoretical Techniques -
7.2 Success in Observing the Unusual Nature of Rutherfordium
- Periodic Law and the Chemical Properties of Superheavy Elements -
8. Materials Science Research
8.1 Solving for the Tricks of Magic Number Structure in Nuclei
9. Environmental Science Research
9.1 Measurement of Uranium Isotope Ratios in Fine Particles
- Advancement of Safeguards Environmental Sample Analysis -
9.2 Investigating the Origin of Seabed Materials
- Particulate Material Transport Processes in the Japan Sea -
10. Research on Advanced Computational Science
10.1 Why Does the Addition of Sulfur Make Metals Brittle?
- First-Principles Calculations Reveal the Weakening of the Nickel Grain Boundary -
10.2 Novel Superfluidity Common for Fermi Atom Gases and Nanoscale Superconductors
- Exact Diagonalization for Ultra Large-Scale Hamiltonian Matrix on the Earth Simulator -
11. Irradiation Technology Development
11.1 Progress on Clarification of IASCC Phenomenon
- Irradiation under a LWR Core Environment -