Abstract:
:Using a sector-field ICP-MS the vertical distributions of the (99)Tc concentration and (99)Tc/(137)Cs activity ratio were measured in the coastal waters off Aomori Prefecture, Japan, where a spent-nuclear-fuel reprocessing plant has begun test operation. The (99)Tc concentrations in surface water ranged from 1.8 to 2.4 mBq/m(3), no greater than the estimated background level. Relatively high (99)Tc/(137)Cs activity ratios (10-12 × 10(-4)) would be caused by the inflow of the high-(99)Tc/(137)Cs water mass from the Japan Sea. There is no observable contamination from the reprocessing plant in the investigated area. The (99)Tc concentration and the (99)Tc/(137)Cs activity ratio in water column showed gradual decreases with depth. Our results implied that (99)Tc behaves in a more conservative manner than (137)Cs in marine environments.
journal_name
J Environ Radioactjournal_title
Journal of environmental radioactivityauthors
Nakanishi T,Zheng J,Aono T,Yamada M,Kusakabe Mdoi
10.1016/j.jenvrad.2011.04.008subject
Has Abstractpub_date
2011-08-01 00:00:00pages
774-9issue
8eissn
0265-931Xissn
1879-1700pii
S0265-931X(11)00080-4journal_volume
102pub_type
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