UC-62 Potential eye hazards associated with concentrated reflected light are evaluated for the ERDA 5-MW t Solar Thermal Test Facility to be constructed at Sandia Laboratories. Albuquerque. New Mexico. Light intensities and hazardous ranges of single and multiple coincident heliostat beams are evaluated at ground level and in the air space above the facility. Possible long-range and short-range effects of distractive effects of reflected beams are discussed. Also described are certain beam control modifications which were incorporated to minimize the altitudes at which overflying aircraft could encounter unsafe levels. Recommendations are made for further evaluation of intensity excursions during fail-safe shutdown situations. and for experiments to verify analytical models and to assess distractive glint effects.

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