Some months ago, the Engineering Department was requested to make an evaluation estimate of the cost of obtaining approximately 150,000 gpm of cooling water from shallow ponds or from cooling towers. Their conclusions (see DPWZ-5305) were (1) that both schemes were feasible and each produced cooling water of approximately the same annual average temperature; (2) the cooling towers could be built more quickly, largely because no additional engineering data were required before construction would start; and (3) the cooling ponds probably would be cheaper. Data obtained from Clark Hill Reservoir in Georgia and Woods Reservoir in Tennessee indicated that significant reductions in the temperature of the cooling water could be made if the water were withdrawn from the deep portion of the reservoir rather than from the surface. Also, it appeared that the water from a reservoir 100 feet deep would be significantly colder than the water obtained from the reservoir only 40 feet deep. The studies reported herein were an attempt to evaluate the benefits that would accrue from obtaining cooling water from a deep lake rather than from a shallow pond.

A technique has been devised for the non-destructive determination of the uranium hydride and/or iron content in uranium fuel slugs of Hanford size. The technique, an adaptation of the Gouy method for measuring magnetic susceptibilities, is based on the ferromagnetic properties of the hydride below 173 deg K. A large electromagnet and a pain balance are utilized in measuring the magnetic forces on a vertically suspended slug at liquid nitrogen temperatures and at room temperature. It was found possible to test as many as 250 slugs per eight-hour day in this manner. (auth)

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