Year
1994
Abstract
A large volume air bath calorimeter with two preconditioners has been in operation at the Lawrence Livermore National Laboratory (LLNL) since August 1993. The calorimeter is capable of measuring samples up to 11 inches diameter by 17 inches high with wattages from 1 to 20 watts. The average assay time is between 2'/2 and 3Yi hours which allows for 2 to 3 runs per 8 hour workday. This calorimeter is unique because of its large physical sample size, yvide range of power measuring capabilities and air bath medium. The results from this calorimeter outperformed its specifications in terms of accuracy and repeatability. This paper will discuss the measurement experience using this calorimeter, including an evaluation of its capabilities and performance.