Abstracts and Available Papers Presented at the 2004 International RERTR Meeting
BURN-UP MEASUREMENTS OF SPENT FUEL USING GAMMA
SPECTROMETRY TECHNIQUE
C. Pereda, C. Henríquez, J. Klein and J. Medel
Comisión Chilena de Energía Nuclear
Amunátegui 95, Santiago, Chile
ABSTRACT
Burn-up results obtained for HEU (45% of 235U) fuel
assemblies of the RECH-1 Research Reactor using gamma
spectrometry technique are presented. The spectra were
got from an in-pool facility built in the reactor to be
mainly used to measure the burn-up of irradiated fuel
assemblies with short cooling time, where 95Zr is being
evaluated as possible fission monitor. A program to
measure all spent fuel assemblies of the RECH-1 reactor
was initiated in the frame of the Regional Project RLA/4/018:
“Management of Spent Fuel from Research Reactors”. The
results presented here were obtained from HEU spent fuel
assemblies with cooling time greater than 100 days and
137Cs was used as fission monitor. The efficiency of the
in-pool system was determined using a slightly burnt
experimental fuel assembly, which has one fuel plate
(one of the outer plates) and the rest are dummy plates.
An average burn-up of 2.8% of 235U was previously
measured for the experimental fuel assembly utilizing a
facility installed in a hot cell and 137Cs was used as
monitor.
Contact: Dr. Jordi Roglans-Ribas
Technical Director, RERTR Department
Nuclear Engineering Division – 362
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
Fax: +1 630-252-5161
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