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Water wells drilled in the Hanford Works area for water quality monitoring, water level determination and geologic information demand use of steel casing. This casing is required due to the inability of the unconsolidated sediments penetrated by the well to stand without support. It is obvious that openings in the casing must be provided to permit free communication with the water bearing formation if the well is to be useful for water quality determination, aquifer testing and water level information. A shaped charge system originally designed for oil well squeeze cementing was adapted for non-routine re-perforating of Hanford water wells. Ten-gram shaped charges developed by Jet Research Center, Arlington, Texas are utilized. The charge carrier is a special 5`` diameter, 5` long heavy-wall steel tube. This carrier or gun is so designed that in each plane of shots there are four horizontal charges placed at 90{degree} angles. These shot planes are placed 3`` apart and successive shot planes are phased at 45{degree} angles with respect to each other. A maximum of 16 perforations per foot may be made and a maximum of four feet perforated with one carrier. Tandem or multiple runs may be made if greater length and density …

This report contains the weekly summaries for the Purex process at the Hanford Engineer Works for January 6, 1958 to December 29, 1958. Each summary includes uranium production, maximum operating rate, and waste loss statistics as well as an operating experience briefing. (JL)

This report contains brief discussions on reactor physics on: metallurgy; production piles; separation plants; plutonium recycle program; and cross section measurements.

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