Magnetic moment measurements are made on holmium single crystals (hcp) from 1.3 to 300 deg K in magnetic fields from 250 to 18,000 Oe, with the field applied along the c axis, the a axis, and a (1010) direction. The STA1010! direction is the direction of easy magnetization with an extrapolated effective moment per atom at saturation of 10.34 Bohr magnetons. Basal plane measurements show antiferromagnetism below the Neel temperature of 132 deg K with basal plane anisotropy occurring below 80 deg K. Below the Neel point, an anomalous type of transition to ferromagnetic behavior upon application of sufficient field is observed. Magnetization curves for the c axis are linear down to 60 deg K, while measurements below 20 deg K show an initial magnetization of approximately 1.7 Bohr magnetons followed by nearly linear magnetization curves. Electrical resistivity measurements are made from 4.2 to 300 deg K. For the a axis, the resistivity changes slope slightly at 20 deg K. A larger change in slope occurs at the Neel temperature of 132 deg K. For the c axis, the resistivity changes slope slightly at 20 deg K, reaches a peak at 120 deg K, goes through a minimum at 132 …

Technical progress is reported on specific reactor projects and on general engineering research and development programs. Developmental activities are reported on the EBWR, Borax-V, the liquid metal cooled zero power experiments, EBR-I EBR II, and FARET. In general reactor technology, research is reported on applied reactor physics, reactor fuels development, reactor materials, and chemical separations. In advanced systems research and development, work is reported on the Argonne Advanced Research Reactor and on direct conversion. Safety studies are reported on thermal reactors and fast reactors. (J.R.D.)

From introduction: The primary objective of Project 30.2 was to evaluate the protection afforded by a reinforced-concrete dual-purpose underground parking garage and personnel shelter against effects of a nuclear detonation.