Abe K, Iyogi T, Kawabata H, Chiang J H, Suwa H, Hisamatsu S
Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho, Aomori, Japan
Institute for Environmental Sciences, 1-7 Ienomae, Obuchi, Rokkasho, Aomori, Japan.
Radiat Prot Dosimetry. 2015 Nov;167(1-3):331-5. doi: 10.1093/rpd/ncv273. Epub 2015 May 5.
The spent nuclear fuel reprocessing plant of Japan Nuclear Fuel Limited (JNFL) located in Rokkasho, Japan, discharged small amounts of (85)Kr into the atmosphere during final tests of the plant with actual spent fuel from 31 March 2006 to October 2008. During this period, the gamma-ray dose rates due to discharged (85)Kr were higher than the background rates measured at the Institute for Environmental Sciences and at seven monitoring stations of the Aomori prefectural government and JNFL. The dispersion of (85)Kr was simulated by means of the fifth-generation Penn State/NCAR Mesoscale Model and the CG-MATHEW/ADPIC models (ver. 5.0) with a vertical terrain-following height coordinate. Although the simulated gamma-ray dose rates due to discharged (85)Kr agreed fairly well with measured rates, the agreement between the estimated monthly mean (85)Kr concentrations and the observed concentrations was poor. Improvement of the vertical flow of air may lead to better estimation of (85)Kr dispersion.
位于日本六所村的日本核燃料有限公司（JNFL）乏核燃料后处理厂，在2006年3月31日至2008年10月使用实际乏燃料进行工厂最终测试期间，向大气中排放了少量的氪-85。在此期间，因排放氪-85导致的伽马射线剂量率高于环境科学研究所、青森县政府和JNFL的七个监测站所测量的本底率。利用第五代宾夕法尼亚州立大学/美国国家大气研究中心中尺度模式以及具有垂直地形跟踪高度坐标的CG - MATHEW/ADPIC模型（版本5.0）对氪-85的扩散进行了模拟。尽管模拟得到的因排放氪-85导致的伽马射线剂量率与测量率相当吻合，但估计的月平均氪-85浓度与观测浓度之间的一致性较差。改善空气的垂直流动可能会使氪-85扩散的估计更准确。
