TY - THES TI - The distribution, atmospheric transfer, and assessment of krypton-85; Distribution, transfert atmospherique et bilan du krypton-85 AB - Techniques for sampling and measuring krypton-85 have been developed which allowed to determine its geographical distribution. From its use as a tracer, an evaluation of the air masses which cross over the subtropical fronts has been derived. Besides, the stratospheric character of air pollution by krypton-85 at the level of the antarctic soil has been shown out. Levels of krypton-85 seem to point out to an underestimation of the assessment of nuclear explosion fission energies as adopted by the United Nations Scientific committee on the effects of atomic radiation and emphasize the need to set limits as soon as possible to the amounts of krypton-85 released to the atmosphere by fuel-reprocessing plants. (author) [French] La mise au point de techniques de prelevement et de mesure du krypton-85 atmospherique a permis de determiner sa repartition geographique. De son utilisation comme traceur on deduit une evaluation des masses d'air qui traversent les fronts subtropicaux. Par ailleurs, le caractere stratospherique de la pollution de l'air par le krypton-85 au niveau du sol antarctique est mis en evidence. Le bilan du krypton-85 semble reveler une sous-estimation du bilan des energies de fission des explosions adopte par le Comite scientifique des Nations Unies et souligne la necessite de limiter des que possible les quantites de krypton-85 rejetees dans l'atmosphere par les usines de traitement de combustibles irradies. (auteur) AU - "Pannetier, R [Commissariat a l'Energie Atomique, 92 - Fontenay-aux-Roses (France). Centre d'Etudes Nucleaires]" KW - "54 ENVIRONMENTAL SCIENCES" KW - "ARGON 36" KW - "ATMOSPHERIC CHEMISTRY" KW - "ATMOSPHERIC CIRCULATION" KW - "ATMOSPHERIC EXPLOSIONS" KW - "DOSE RATES" KW - "FALLOUT" KW - "FUEL REPROCESSING PLANTS" KW - "GEOGRAPHICAL VARIATIONS" KW - "KRYPTON 85" KW - "MASS SPECTROSCOPY" KW - "PROBABILISTIC ESTIMATION" KW - "PROPORTIONAL COUNTERS" KW - "RADIOACTIVE AEROSOLS" KW - "RADIOACTIVE CLOUDS" KW - "RADIOACTIVE WASTE DISPOSAL" KW - "SAMPLING" KW - "TROPOSPHERE" DO - https://doi.org/ UR - https://www.osti.gov/etdeweb/servlets/purl/20523374 PB - CY - France PY - 1968 DA - 1968-06-01 LA - French J2 - [] VL - C1 - CEA Fontenay-aux-Roses, 92 (France); Faculte des Sciences de l'Universite de Paris, Centre d'Orsay, 91 (France) C2 - C3 - CEA-R-3591 C4 - C5 - Available from INIS in electronic form L3 - Other Information: TH: These docteur es-sciences physiques; 58 refs; PBD: Jun 1968 ER -