Brief summaries are given for each of the following activities for this two month period: (1) high water pressure channel (ANL-140); (2) KAPL fuel element tests (SR-79, Beta Experiment); (3) underwater facility for opening slugs; (4) strength of masonite at elevated temperatures; and (5) controlled temperature of graphite.

This report discusses progress made by the Physical Chemistry Group and Pile Engineering Groups. Topics covered are as follows: x-ray studies--tube bore mining; physical expansion of capsule exposures; special capsule exposures; pile annealing; thermal conductivity and pile annealing; total stored energy; Sykes stored energy method; slug corrosion rate; effect of pressure drop on slug corrosion; exposure of P-10 fuel slugs; slug corrosion weight loss variables; vertical safety rod thimble corrosion; front tube corrosion; magnesium corrosion program; thimble corrosion program; horizontal thimble removal; metal exposure production tests; special pile measurements; carbon dioxide; H pile power level increase; vertical thimble temperature; graphite core samples; nine tube mock-up; and required header pressure.

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A coincidence circuit using the traveling wave principle as applied to distributed amplification is described. The resolving time is about 10{sup -8} sec. when the device is used in connection with scintillation detectors.