Abstracts and Available Papers Presented at the
2000 International RERTR Meeting
Fuel Element Burnup Determination in HEU - LEU Mixed TRIGA Research Reactor Core
Tomaž Žagar, Matjaž Ravnik
Institute "Jožef
Stefan", Jamova 39, Ljubljana, Slovenia
Abstract
This paper presents the results of a burnup calculations and burnup measurements for TRIGA FLIP HEU fuel elements and standard TRIGA LEU fuel elements used simultaneously in small TRIGA Mark II research reactor in Ljubljana, Slovenija. The fuel element burnup for approximately 15 years of operation was calculated with two different in house computer codes TRIGAP and TRIGLAV (both codes are available at OECD NEA Data Bank). The calculation is performed in one-dimensional radial geometry in TRIGAP and in two-dimensional (r,j) geometry in TRIGLAV. Inter-comparison of results shows important influence of in-core water gaps, irradiation channels and mixed rings on burnup calculation accuracy. Burnup of 5 HEU and 27 LEU fuel elements was also measured with reactivity method. Measured and calculated burnup values are inter-compared for these elements.
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Contact:
Mr. Tomaž Žagar
Institute "Jožef
Stefan"
Reactor Physics Department
Jamova 39
S1-1000 Ljubljana, Slovenia
Phone: +386-1-5885-311
Fax: +386-1-5612-335
E-mail: tomaz.zagar@ijs.si
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