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This report is about the Calculations of hard-sphere packings in large cylinders.

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This is a data analysis report of the 25 tests conducted with the Cold Flow Development Test System during October and November of 1965.

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This report compares experimental forced convection heat transfer data for cryogenic hydrogen with a number of equations that have been proposed for predicting liquid-side heat transfer coefficients for convectively-cooled rocket nozzles. Experimental data have been taken from tests in both straight and curved electrically-heated tubes at pressures ranging from 600 to 1500 psi and at coolant temperatures less than 200°R. The problem of extrapolating these equations to test conditions not explicity achieved in experiments is also described.

Methods were developed to calculate axial flux distributions from a knowledge of control rod position and fuel exposure during full-power nuclear operation of the HWCTR. The maximum specific power, heat flux, and core temperature of each fuel assembly were determined from the flux distributions to ensure safe operation of the reactor. Also, methods were developed to compute the axial exposure distribution of fuel assemblies as required for evaluation of the irradiation performance of each test fuel design.

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The Pacific Northwest Laboratory has convened this meeting to enlist the best talents of our laboratories and industry in soliciting factual, technical information pertinent to the Pacific Northwest's Laboratory's evaluation of the potential fuel systems for the Fast Flux Test Facility. The particular factors emphasized for these fuel systems are those associated with safety, ability to meet testing objectives, and economics. The proceedings includes twenty-three presentations, along with a transcript of the discussion following each, as well as a summary discussion.

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During the reentry destruction of an isotopic generator, the mechanisms of fuel form ablation must be predictable to properly assess the nuclear hazard associated with the event. Ultimate land deposition patterns and contaminant densities are directly a function of the final ablative particle size. One mechanism of fuel form ablation is the mechanical breakup of molten material by aerodynamic forces created during hypervelocity reentry. The object of this study was to determine the feasibility of describing the breakup phenomenon by statistical mechanical analytic techniques, and to determine the applicability of employing a light gas gun and a controlled environmental range to experimentally observe the breakup phenomenon. (auth)

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