Initial results from a study of EUV emissions from the 2XIIB experiment are reported. Time-dependent brightness measurements of deuterium, oxygen, nitrogen, carbon and titanium emissions from the central 2XIIB plasma have been made. The deuterium Lyman alpha brightness is 1.5 x 10/sup 17/ photons sec/sup -1/cm/sup -2/sr/sup -1/. The Lyman alpha time development and broad spectral profile are consistent with other knowledge of the 2XIIB plasma. Oxygen is the dominant impurity in 2XIIB. The 0 VI 1032 A brightness is 1.65 x 10/sup 18/ photons sec/sup -1/cm/sup -2/sr/sup -1/. The oxygen concentration is 2% and its estimated confinement lifetime is 300 ..mu..s; this may imply mirror confinement of the oxygen ions. Nitrogen and carbon concentrations are 0.4% and 0.3%, respectively. It is not certain whether these impurities are mirror confined. The titanium concentration is believed to be low compared to that of oxygen. The power loss from the central plasma due to radiation by and ionization of light impurities is approximately 60 kW, which is 4% of the power deposited by the neutral beams. Further studies of impurity sources and penetration are now being performed.

The proposed weld modifications for LOFT DTT's planned for future use in nuclear blowdown experiments are described. The attached calculations provide the basis for the statements concerning weld modifications.

The results are presented of stress analysis and evaluation of the drag-disc turbine transducer (DTT) shroud and cover welds used in the Loss-of-Fluid Test (LOFT) facility. The analysis concerns LOFT DTTs currently installed and/or planned for use in future experiments by LOFT Experimental Measurements Branch personnel. Thermal/hydraulic conditions for Experiments L1-5 and L2-4 (for all nuclear tests) were used to predict the loads experienced by the various shroud and cover welds. The results of this analysis include minimum fatigue life for all subject welds, and Applied Mechanics Branch recommendations for improving the structural integrity of critically stressed welds.

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This document contains information used in the certification and verification of the Calmac Flat Plate Collector. Contained are such items as test procedures and results, information on materials used, Installation, Operation, and Maintenance Manuals, and other information pertaining to the verification and certification.