Argonne National Laboratory
Reduced Enrichment for Research and Test Reactors
Nuclear Science and Engineering Division at Argonne
U.S. Department of Energy

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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

[email protected]


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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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:  [email protected]

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Last modified on July 29, 2008 11:34 +0200