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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 1,002 - 1,008 (7page)
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초록· 키워드
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An understanding of the coarsening process of the large fission gas pores in the high burnupstructure (HBS) of irradiated UO2 fuel is very necessary for analyzing the safety andreliability of fuel rods in a reactor. A numerical model for the description of pore coarseningin the HBS based on the Ostwald ripening mechanism, which has successfullyexplained the coarsening process of precipitates in solids is developed. In this model, thefission gas atoms are treated as the special precipitates in the irradiated UO2 fuel matrix.
The calculated results indicate that the significant pore coarsening and mean pore densitydecrease in the HBS occur upon surpassing a local burn-up of 100 GWd/tM. The capabilityof this model is successfully validated against irradiation experiments of UO2 fuel, in whichthe average pore radius, pore density, and porosity are directly measured as functions oflocal burn-up. Comparisons with experimental data show that, when the local burn-upexceeds 100 GWd/tM, the calculated results agree well with the measured data.
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참고문헌 (45)
참고문헌 신청
M.V. Speight / 1971 / A calculation on the size distribution of intragranular bubbles in irradiated UO2 / J. Nucl. Mater 38:236~238
J. Rest / 1994 / Dynamics of irradiation-induced grain subdivision and swelling in U3Si2 and UO2 fuels / J. Nucl. Mater 210:187~202
D.R. Olander / 2006 / Re-solution of fission gas - A review: Part I. Intragranular bubbles / J. Nucl. Mater 354:94~109
M. Lemes / 2015 / An empirical formulation to describe the evolution of the high burnup structure / J. Nucl. Mater 456:174~181
C.B. Lee / 2000 / An attempt to explain the high burnup structure formation mechanism in UO2 fuel / J. Nucl. Mater 279:207~215
J. Rest / 1994 / Dynamics of irradiation-induced grain subdivision and swelling in U3Si2 and UO2 fuels / J. Nucl. Mater 210:187~202
D.R. Olander / 2006 / Re-solution of fission gas - A review: Part I. Intragranular bubbles / J. Nucl. Mater 354:94~109
M. Lemes / 2015 / An empirical formulation to describe the evolution of the high burnup structure / J. Nucl. Mater 456:174~181
C.B. Lee / 2000 / An attempt to explain the high burnup structure formation mechanism in UO2 fuel / J. Nucl. Mater 279:207~215
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