1957•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
RELEASE OF FISSION GASES FROM IRRADIATED URANIUM DIOXIDE. PART I. APPARATUS FOR THE MEASUREMENT OF FISSION GAS RELEASE FROM FUEL MATERIALS DURING PILE IRRADIATION
Judy Markowitz, R.C. Koch, J.A. Roll
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Abstract
An apparatus for the continuous measurement of the rate of escape of short-lived inert gas fission products from fuel materials during pile irradiation is described. Helium carrier gas is swept over a bare fuel element specimen placed in an in-pile furnace. Escaping fission products are carried into an out-of-pile gas handling system, where they are removed from the helium by selective adsorption on charcoal. An aliquot of the subsequently desorbed fission gas is anmlyzed by gamma-ray spectroscopy. The emanation of specific fission gases from the specimen surface is calculated from the measured gamma activity by applying corrections for counter efficiency, decay, decay scheme branching, and aliquot ratio. Details of design and construction are presented, and experimental operotions and treatment of the data are described. (auth)