A limited program of evaluation of the ML-1 technology as related to the design of the calandria/pressure vessel assembly was completed. This work included: a photoelastic experimental program which resulted in the conclusion that values recommended by Langer and O'Donnell for the effective elastic constants employed in the analysis of ligament stresses in the ML-1 type tube sheets in the past results in a good approximation of the bending constants but in a value of the tensile elastic modulus which is about 40% too high; several modifications to the TSA computer code for stress calculations which improved the precision and flexibility of the code; and a very preliminary evaluation of the properties of candidate materials for use in a high-performance, advanced ML-1 type pressure vessel.

This report discusses the vertical bowing measurements for the Hanford B Reactor for July 1, 1965. Only one table is included.

This report, for June 1965 from the chemical Processing Department at HAPO, discusses the following: Production operation; Purex and Redox operation; Finished products operation; maintenance; Financial operations; facilities engineering; research; and employee relations.

This manual provides a list of the quantities of plutonium and plutonium isotope formation. Other isotopes whose concentrations are important and included in this report are U-236 buildup, U-235 burnout, U burnout, Np-237 build-up, GVR (the Gas Volume Ratio) in coproduct target elements and equivalent gram of plutonium. These conversion tables have been calculated on the IBM 7090 digital computer using a program entitled ``FLEX-3.`` The results of the computer solutions have not been normalized to conversion observed by Chemical Processing Department measurement since none are yet available. Conversion ratios for four types of N-Reactor fuel have been evaluated, they are: (1).947 percent U-235 normal fuel loading; (2)1.25 percent U-235 ``spike`` enrichment; (3)1.25 percent U-235 outer, Li-Al inner -- coproduct fuel; (4)1.96 percent U-235 outer, Li-Al inner -- coproduct fuel.

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This reports documents progress in process and reactor development, reactor engineering, reactor physics, radiological engineering, process technology, auditing, fuel failure experience, operational physics, process physics, and testing.

This monthly report details reactor and materials technology activities during the month of June 1965.

This report provides the status of production test control tube loadings in reactor process tubes containing significant amounts of SS materials.

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A status report is given for the N Reactor. Brief summaries are included for the following technical activities: Co-product physics studies; Target melting calculations; Critical mass parameters; Stack flooding calculations; Co-product metal handling; Co-producer demonstration test; Thermal hydraulics; Primary cooling system supply characteristics; Fringe tube orificing; Fuel tube power split; Simulated driver-target test; Fuel element failure evaluation; 1.96% Integral-target production test; Conversion ratio tests; Fuel examination facility; Process tube monitoring; Corrosion monitoring; I-131 concentrations in river influent following ruptures; and Production of Np-237 and Pu-238 in the N Reactor.

A total burn-spectrographic method has been applied to the determination of trace concentrations of silicon in plutonium. The sample is oxidized to plutonium dioxide, mixed with a germanium dioxide-graphite mixture containing tin internal standard, packed into cupped graphite electrodes, and burned to completion in a high amperage direct current arc. Plutonium spectral interference is minimized by optical means and by use of a less intense silicon line. The sensitivity is thereby decreased but is still sufficient to determine 25 ppm of silicon in plutonium. The precision of the method is estimated to be �8% (relative standard deviation) at the 270 ppm level and �14% at 40 ppm.

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