Radiation-dose estimates and hazard evaluations for inhaled airborne radionuclides. Annual progress report, July 1981-June 1982

The objective was to conduct confirmatory research on aerosol characteristics and the resulting radiation dose distribution in animals following inhalation and to provide prediction of health consequences in humans due to airborne radioactivity which might be released in normal operations or under accident conditions during production of nuclear fuel composed of mixed oxides of U and Pu. Four research reports summarize the results of specific areas of research. The first paper details development of a method for determination of specific surface area of small samples of mixed oxide or pure PuO/sub 2/ particles. The second paper details the extension of the biomathematical model previously used to describe retention, distribution and excretion of Pu from these mixed oxide aerosols to include a description of Am and U components of these aerosols. The third paper summarizes the biological responses observed in radiation dose pattern studies in which dogs, monkeys and rate received inhalation exposures to either 750/sup 0/C heat treated UO/sub 2/ + PuO/sub 2/, 1750/sup 0/C heat-treated (U,Pu)O/sub 2/ or 850/sup 0/C heat-treated pure PuO/sub 2/. The fourth paper described dose-response studies in which rats were exposed to (U,Pu)O/sub 2/ or pure PuO/sub 2/. This paper updates earlier reports and summarizes the status of animals through approximately 650 days after inhalation

Energy Conservation Through the Use of Modular Refractory Fiber Linings - An Unexpected Divided

Several years ago, J T Thorpe Company embarked on a search for the ideal refractory lining. The primary design consideration was the development of a refractory lining system that was cost effective, met furnace design conditions (cold face temperature, heat loss, velocity, etc.), and was free of operation failures. These efforts produced the Z-BLOK* Module Refractory Fiber Lining, which was first installed in an operating furnace in April, 1975. After obtaining a patent for this unique modular refractory lining system, Thorpe transferred the patents to Johns-Manville and became the Johns-Manville licensed distributor/fabricator for the Southwest area

Radiation exposure and risk estimates for inhaled airborne radioactive pollutants including hot particles : annual progress report July 1, 1976-June 30, 1977 /

Manuscript completed January 1978, published March 1978.Prepared for Division of Safeguards, Fuel Cycle, and Environmental Research, Office of Nuclear Regulatory Research under contract no. E(29-2)--1013.Includes bibliographical references.Mode of access: Internet