Abstract
Basic Safety Research on Nuclear Fuels in 1990 centered on studies of the interrelation between structure, fission gas release and operating conditions of high burn-up LWR fuel. Basic mechanisms of fission product release were clarified. For safety studies, the specific heat capacity of molten UO{sub 2} was measured up to 8000 K. Structural and chemical changes limit the operation of mixed nitride fuels to-centre temperatures below 2000 K. The Safe Handling of Fuel concentrated on the spread of airborne contamination in accident situations. The nuclear transmutation of long-lived radioactive waste constituents and the recycling of self- generated Pu was studied. The effects of long- term storage on leachibility and mechanical stability of waste glasses was simulated. UO{sub 2} corrosion in aqueous solutions, for spent fuel storage possibilities, was studied. Neptunium and plutonium compounds were prepared and characterised for solid state measurements. Band structures of actinide intermetallics were calculated. Photoelectron spectroscopy was performed with PuSe and UA1Ni and high-pressure phases as well as compressibilities were determined for PuO{sub 2}, PuSe, Pm, and a Pm-Sm alloy. The pressure dependence of the optical reflectivity was measured for several compounds of U and Th. The effectiveness of acoustic aerosol agglomeration was confirmed. Analytical work
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Citation Formats
None.
Annual report 1990. Institute for Transuranium Elements.
CEC: N. p.,
1991.
Web.
None.
Annual report 1990. Institute for Transuranium Elements.
CEC.
None.
1991.
"Annual report 1990. Institute for Transuranium Elements."
CEC.
@misc{etde_10127602,
title = {Annual report 1990. Institute for Transuranium Elements}
author = {None}
abstractNote = {Basic Safety Research on Nuclear Fuels in 1990 centered on studies of the interrelation between structure, fission gas release and operating conditions of high burn-up LWR fuel. Basic mechanisms of fission product release were clarified. For safety studies, the specific heat capacity of molten UO{sub 2} was measured up to 8000 K. Structural and chemical changes limit the operation of mixed nitride fuels to-centre temperatures below 2000 K. The Safe Handling of Fuel concentrated on the spread of airborne contamination in accident situations. The nuclear transmutation of long-lived radioactive waste constituents and the recycling of self- generated Pu was studied. The effects of long- term storage on leachibility and mechanical stability of waste glasses was simulated. UO{sub 2} corrosion in aqueous solutions, for spent fuel storage possibilities, was studied. Neptunium and plutonium compounds were prepared and characterised for solid state measurements. Band structures of actinide intermetallics were calculated. Photoelectron spectroscopy was performed with PuSe and UA1Ni and high-pressure phases as well as compressibilities were determined for PuO{sub 2}, PuSe, Pm, and a Pm-Sm alloy. The pressure dependence of the optical reflectivity was measured for several compounds of U and Th. The effectiveness of acoustic aerosol agglomeration was confirmed. Analytical work for the Commission`s Safeguards Directorate is continued in collaboration. A robotized system for the preparation and conditioning of samples from a reprocessing plant for mass spectrometry was installed. Major contract Work for Third Parties in 1990 dealt with the study of dissolution characteristics of high burn-up fuel, the preparation of minor actinide alloys, production of alpha-emitting nuclides for radio-therapy, and the transfer of fuel pin codes.}
place = {CEC}
year = {1991}
month = {Dec}
}
title = {Annual report 1990. Institute for Transuranium Elements}
author = {None}
abstractNote = {Basic Safety Research on Nuclear Fuels in 1990 centered on studies of the interrelation between structure, fission gas release and operating conditions of high burn-up LWR fuel. Basic mechanisms of fission product release were clarified. For safety studies, the specific heat capacity of molten UO{sub 2} was measured up to 8000 K. Structural and chemical changes limit the operation of mixed nitride fuels to-centre temperatures below 2000 K. The Safe Handling of Fuel concentrated on the spread of airborne contamination in accident situations. The nuclear transmutation of long-lived radioactive waste constituents and the recycling of self- generated Pu was studied. The effects of long- term storage on leachibility and mechanical stability of waste glasses was simulated. UO{sub 2} corrosion in aqueous solutions, for spent fuel storage possibilities, was studied. Neptunium and plutonium compounds were prepared and characterised for solid state measurements. Band structures of actinide intermetallics were calculated. Photoelectron spectroscopy was performed with PuSe and UA1Ni and high-pressure phases as well as compressibilities were determined for PuO{sub 2}, PuSe, Pm, and a Pm-Sm alloy. The pressure dependence of the optical reflectivity was measured for several compounds of U and Th. The effectiveness of acoustic aerosol agglomeration was confirmed. Analytical work for the Commission`s Safeguards Directorate is continued in collaboration. A robotized system for the preparation and conditioning of samples from a reprocessing plant for mass spectrometry was installed. Major contract Work for Third Parties in 1990 dealt with the study of dissolution characteristics of high burn-up fuel, the preparation of minor actinide alloys, production of alpha-emitting nuclides for radio-therapy, and the transfer of fuel pin codes.}
place = {CEC}
year = {1991}
month = {Dec}
}