During April 1962, equipment in both the main Redox Building (202-S) and the Plutonium Concentration Building (233-S) vas rearranged to allow the accumulation and recovery of neptunium without interference with the production of uranium and plutonium. In order to do this, the former rework column (1S) was put into continuous service as a neptunium recovery column, the Third Plutonium Cycle was converted to a neptunium decontamination cycle, and ion-exchange equipment was installed in the 233-S Building to replace the Third Plutonium Cycle. The neptunium, once decontaminated, will be concentrated and loaded out via its own system in the 233-S Building. To check the critical mass safety of the new arrangement, a formal hazards review was made, the results of which are reported in this document.

This document details activities of the Fuels Preparation Department during the month of June 1962.

This document details activities of the Fuels Preparation Department during the month of March 1962. (FI)

This document provides the monthly reports of the Reactor Operation Branch for the months of January 1961 through December 1961. (FI)

The objective of this production test is to evaluate the irradiation behavior of N Reactor fuel elements at conditions equivalent to or more severe than those expected in N Reactor. N Reactor fuel elements are authorized for irradiation in KER Loops 3 and 4 to exposures no greater than 3000 MWD/T. Tubular steel spacers, per steel spacers, solid steel dummies, and a flow channel temperature measuring thermocouple train are authorized for use in KER loops 3 and 4 to permit positioning the fuel element charge in the process tube, controlling pressure drop across the process tube when using short fuel charges, and measuring the coolant temperature unbalance in the different fuel element flow channels.