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Latest News
Hanford completes 20 containers of immobilized waste
The Department of Energy has announced that the Hanford Site’s Waste Treatment and Immobilization Plant (WTP) has reached a commissioning milestone, producing more than 20 stainless steel containers of immobilized low-activity radioactive waste.
Tatsuhiko Uda, Masahiro Tanaka, Toshiya Tamari, Hideki Kakiuchi, Noriyuki Momoshima
Fusion Science and Technology | Volume 60 | Number 4 | November 2011 | Pages 1244-1247
Environmental and Organically Bound Tritium | Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) | doi.org/10.13182/FST11-A12655
Articles are hosted by Taylor and Francis Online.
Atmospheric tritium concentrations and organically bonding tritium OBT of pine needles at NIFS Toki site had been measured considering environmental safety of future deuterium plasma experiment by large helical device (LHD). Atmospheric tritium concentrations of three chemical forms such as water HTO, hydrogen HT and methane CH3T had been measured since 2004. Tritium concentrations of HTO, HT and CH3T were distributed around 2-23 mBq/m3, 6-11 mBq/m3 and 0.5-3 mBq/m3 respectively. The HTO concentration principally depends on humidity in air. Recent decreasing rate of HT concentration to half was estimated 19.4 years. The OBT concentration tends to decrease and the rate to half was almost 9.4 years. Also the OBT measurements were cross checked with burning and liquid scintillation counting method and 3He mass spectrometric method. Both analyzed results showed good agreement. Long term monitoring of environmental tritium would be necessary from view point of safety on future nuclear fusion development.
