This document provides the H. I. survey data for the 200 Area for the period of April 28, 1945 through November 2, 1945.

The objectives of Hanford operations are the production of sufficient quantities of plutonium and secondary products in time to meet adequately military requirements at the lowest cost of manpower, money, and materials commensurate with the maximum degree of certainty in attaining the objectives. The facilities operations at Hanford are described.

This May 1945 report deals with how best to estimate the toxicity of ``Product`` to workers at Clinton Laboratories. Discussed are the issues of how toxic product is relative to radium, methods of analysis of product in the body, means of elimination from and distribution of product within the body, and what therapeutic measures are available. The principal concern of the author is that of protection of personnel who regularly handle in the laboratory large amounts of this material.

This monthly report briefly describes ongoing studies including urinary and fecal excretion of Plutonium 238 by human subjects and by rats, exploring way to facilitate the removal of Plutonium 238 from rat bone, the absorption of Plutonium 238 by barley plants, and use of inert iodine to block absorption of Iodine-131 in the rat.

This report discusses the operation of the Hanford Reservation`s 300 Area for December 11 through December 17, 1945. They discuss: extrusion, canning, slug testing, a magnesium chloride flux, and the composition changes of a aluminium-silicon dip bath.

Failure of a vertical safety rod thimble at 105-B has led to consideration of a stainless steel (SS) thimble as replacement. 1/16 in. SS would result in 4% loss in control power of that safety rod. If all thimbles were replaced by 1/16 in. SS, there would be a reactivity loss of 790 ih.

None

None

A report of seven stack emissions of I-131 at the T and B plants, detailing the relationship between cooling times and dilution factors for the safe emission of the isotope. From the stack sampling, personal exposure limits for an eight and nine hour day are calculated. The effect of atmospheric conditions appears to be negligible, although periods of atmospheric stagnation may have an effect on the I-131 concentration. Environmental effects are minimized by increasing the cooling times of the isotope charge. Downdrafts near the stack emissions during low dilution increase the radiation level, but do not pose any inhalation hazard.

On the basis of polonium assays by the customer, an improved equation for the prediction of the polonium content of a bismuth tube has been developed.

None

None

None