None

Undesirably high radiation dosage rates are being encountered in the discharge areas during reactor outages. This is costly to operations in terms of burn-out time, extra work crews, and extended outages require to complete scheduled work. Significant savings in operating costs would be realized if the rear face radiation levels could be reduced during shutdowns. As a first step towards this some measurements have been made to identify and locate the major sources of this radiation. These results are given in this report. It is suggested that this information may be of use in devising a water treatment or purge technique which could reduce the rear face contamination problem encountered during outages.

We have produced and chemically identified for the first time a few atoms of the element with atomic number 101. Very intense helium ion bombardments of tiny targets of 99{sup 253} have produced a few spontaneously fissionable atoms which elute in the eka-thulium position on a cation resin column.

This document details radiation monitoring activities of the Reactor Section during the month of April 1955.

Forty-eight ``half-dollar`` size corrosion specimens were press-clad at 950 F for 5 minutes with 3, 4, 5, and 6 thousand psi to establish a standard sample for the evaluation of the effects of outgassing on the corrosion resistance of nickel-plated uranium. Materials are on hand for the fabrication of tools with which to carry out preliminary work on the internal cladding of natural uranium tubes. At a meeting with BMI and du Pont personnel, Mr. DeBuigne of Moczik Tool and Die Co. recommended a co-axial method for extrusion-cladding uranium plates. Design and fabrication of tools for this work would be done by Moczik.