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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.
G. A Esteban, F. Legarda, A. Perujo
Fusion Science and Technology | Volume 48 | Number 1 | July-August 2005 | Pages 617-620
Technical Paper | Tritium Science and Technology - Materials Interaction and Permeation | doi.org/10.13182/FST05-A1001
Articles are hosted by Taylor and Francis Online.
A time-dependent gas-phase absorption-desorption technique has been used to evaluate the isotope effect on the diffusive transport parameters of hydrogen isotopes in polycrystalline tungsten and the reduced activation ferritic-martensitic steel OPTIFER-IVb.Experiments have been run with both protium and deuterium obtaining their respective transport parameters of diffusivity (D), Sieverts' constant (Ks), the trap site density (Nt) and the trapping activation energy (Et). Isotope effects on these transport parameters are analysed and modelled. Because the classical isotope relation for diffusivity has not been fulfilled, quantum-statistical vibration theory has been applied to model the isotopic relation. The hydrogen vibration properties description in a metallic-host lattice allows deriving more accurate tritium transport parameters. A congruent isotopic variation of diffusion parameters related to the type of crystal structure, bcc, has been confirmed.
