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- W203703048 abstract "Development of the calorimeter equilibrium prediction program has been completed, and tests of the software program have been conducted on calorimeters ranging from 1 to 6 in. (2.5 to 15 cm) in diameter and power inputs between 0.1 and 8.3 W. Equilibrium values have been predicted with relative accuracies of better than 0.1% (95% confidence) and with an average time improvement factor of 2.1, which represents a 52% time saving, for every test case. A computer code is being developed by the University of Cincinnati to describe the steady-state heat transfer in a resistance bridge calorimeter. The computer program which is based on the theory of heat transfer analysis by finite differences has been written and is being checked against experimental data. Following the development of the steady-state code, work will commence on the transient heat flow analysis. The effect of R. Gunnink's new plutonium branching ratios on previous plutonium isotopic ratio measurements is demonstrated. For measurements relative to plutonium-239 the biases change from between 2 and 7% low to between 2 and 13% high. For measurements relative to plutonium-241 the changes in bias are within the statistical uncertainties normally reported for these peaks. In preparation for the proposed demonstrationmore » tests on the Automated Plutonium Assay System (APAS), reliability tests on the system hardware have been conducted and appropriate modifications have been made. The development of the computer software for controlling the system and conducting the tests has continued and the experimental plan outlining the tests has been devised.« less" @default.
- W203703048 created "2016-06-24" @default.
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- W203703048 date "1977-12-23" @default.
- W203703048 modified "2023-10-17" @default.
- W203703048 title "Progress report for the Division of Safeguards and Security: January--June 1977" @default.
- W203703048 doi "https://doi.org/10.2172/5235301" @default.
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