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ANS Student Conference 2025
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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Kazuhiro Kobayashi, Hirofumi Nakamura, Takumi Hayashi, Toshihiko Yamanishi
Fusion Science and Technology | Volume 60 | Number 4 | November 2011 | Pages 1335-1338
Detritiation and Isotope Separation | Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) | doi.org/10.13182/FST11-A12676
Articles are hosted by Taylor and Francis Online.
Transport properties of tritiated water vapor (HTO) in the epoxy paint such as adsorption, desorption, diffusion and dissolution has been evaluated by investigating the HTO exposure and removal behavior from the epoxy paint in order to generate a data base on tritium behavior in tritium-confinement facilities such as the Hot Cell and the tritium plant building in ITER. Two types of experiments were carried out; one was the HTO exposure to the epoxy paint, and the other was the detritiation curves from the epoxy paint after the HTO exposure. Stainless steel vessel chambers with the epoxy painted inside surfaces were first exposed to an air flow containing HTO vapor (740 Bq/cm3) for 1 week, 2 weeks and 2 months. After these exposures, detritiation of these chambers with an air flow was carried out. It was found that the interaction between the surface of the epoxy paint and the HTO such as adsorption and desorption is reached the steady state under these conditions. Based on experimental detritiation curves, the transport properties were evaluated using the tritium transport analysis code, TMAP. The trapping effect is the strong bonds between the HTO and the epoxy such as the chemical bonds, which is represented by trapped HTO in this analysis. Although diffusivity and solubility of HTO in epoxy paints almost agreed with the previous investigations, trapping like effect should be considered to explain observed detritiation behavior.