Study of Fission and High-burnup Induced Restructuring of Nuclear Fuel Ceramics - Applying Computer Science to Investiga
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1043-T12-04
Study of Fission and High-burnup induced Restructuring of Nuclear Fuel Ceramics - Applying Computer Science to investigate Kinetic Process -
© 2008 Materials Research Society 2007/11 MRS Boston
M. Kinoshita, Y. Chen, Y. Kaneta, H. Y. Geng, M. Iwasawa, T. Ohnuma, T. Ichinomiya, Y. Nishiura, M. Itakura, J. Nakamura, K. Misoo, S. Suzuki, H J. Matzke
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MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Introduction NXO Cooperation
JAEA (administrative & hot-lab experiments )
CRIEPI (accelerator experiment, 1st principle calc.)
Univ. of Tokyo (overall control of the NXO program,, 1st principle & molecular dynamics calc., workshops)
© 2008 Materials Research Society Kyushu-Univ. (TEM with in-situ irradiation, results evaluation)
Hokkaido Univ./Hiroshima Univ.
Osaka-prefecture. Univ. (accelerator exp., consulting program
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(non-linear mathematics, new phase-field theories.)
planning, interpretations of results)
New Nippon Steel/Information Mathematics Lab. (software development) MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Introduction Industry (involved) Program
Japan FY
2004 International Workshop
2005 IWS2
2006
2007
2008
IWS4
IWS3
Review of research activities and feedback from Industrial working-field
Code for Engineering Use
Simulation Code
© 2008 Materials Research Society Overall Material Behavior
Fission gas transport, Swelling
Nonlinear Theory, take over G-L
Theory of Driven System Dynamical Phase Diagram (Complex Passes)
Computer Simulation of Transformation MD Potential,
TAD
Engineering with Accelerator Experiment
Reproduction of Process by Accelerator and Simulation Material Compare with high burnup fuel 3
MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Introduction
Control Complex System & Processes Irradiation Deposit of Energy
© 2008 Materials Research Society Self-assembling actions
SelfHealing
Emerging Structure Caulflower Structure
Extension of Ordering Trans-Scale actions
eg., Crack formation 4
MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Introduction Neutronic Rim Effect in LWR fuel pellet Fuel Pellet UO2
Burnup enhancement at pellet periphery
© 2008 Materials Research Society
Burnup Profile (schematic) (40MWd/kgU)
1cm 5
MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Observations at commercial fuel SEM image of Rim-Structure also observed at Pu rich agglomerates in MOX Bubbles New Grain © 2008 Materials Research Society Structure of UO2
6
MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Observations at commercial fuel Pre-assembling before the rim-structure
© 2008 Materials Research Society (a) Planar defect observed in Fuel of 44.3 MWd/kgU,
Sub-structure starts at habit plane of [111]
(L. Thomas, 1992)
～40Mwd/kgU
Planar Structure Formation could be the KEY 7
MRS 2007 Boston,
New Cross Over Project (NXO) of AECJ
Observations at commercial fuel
Fractal nature of the formation process
© 2008 Materials Research Society ～5 μm
Grain sub-division process could be
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