Abstract

A series of experiments has been carried out in the Dounreay Fast Reactor at power levels from 1 to 60 MW to measure the gamma heating (total energy deposition) in materials such as tungsten and stainless steel. Most of the measurements were made in the first row of the breeder and in this position the mean value for the gamma heating in stainless steel was found to be 28 mW/g·MW ± 15%. Several different calorimeter designs are discussed, the electrical calibration procedure is outlined; one standard type and the novel twin bulb differential calorimeter are described in detail.

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