Weiss Dietmar
National Board for Atomic Safety and Radiation Protection, Berlin, Germany.
Isotopes Environ Health Stud. 2011 Sep;47(3):254-64. doi: 10.1080/10256016.2011.602475. Epub 2011 Aug 2.
Extensive investigations on radioactive contamination and on its spatial and temporal changes in the Baltic Sea have been carried out by the National Board for Atomic Safety and Radiation Protection since 1986. The results were compared with data obtained in the years prior to the Chernobyl accident. Due to the composition of the accidental releases and the physical half-life of the released radionuclides, special emphasis was laid on Cs-134 and Cs-137. Other radionuclides, such as H-3, Sr-90, Ru-103 and Ru-106 turned out to be insignificant compared with the caesium isotopes. The radionuclides Cs-134 and Cs-137 accounting for the highest percentage of the released long-lived radionuclides were deposited on the sea surface with an initial ratio of 0.5. Their distribution pattern on the sea surface was affected by the meteorological conditions prevailing during the release period. The horizontal dislocation of higher contaminated water masses and the vertical penetration of radioactive caesium resulted in a prolonged uniformity of the contamination level of the Baltic Sea.
自1986年以来，国家原子安全与辐射防护委员会对波罗的海的放射性污染及其时空变化进行了广泛调查。将结果与切尔诺贝利事故之前几年获得的数据进行了比较。由于事故释放物的组成以及所释放放射性核素的物理半衰期，特别强调了铯-134和铯-137。与铯同位素相比，其他放射性核素，如氢-3、锶-90、钌-103和钌-106的影响微不足道。占释放的长寿命放射性核素比例最高的放射性核素铯-134和铯-137以初始比例0.5沉积在海面。它们在海面的分布模式受释放期间盛行的气象条件影响。高污染水体的水平位移和放射性铯的垂直渗透导致波罗的海污染水平长期保持均匀。
