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Effective diffusivity of neptunium and plutonium in granite from Inada, Ibaraki, Japan under anaerobic conditions
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Tetsuji Yamaguchi
Published/Copyright:
September 25, 2009
Summary
The effective diffusivities of neptunium and plutonium in Inada granite have been determined using the through–diffusion method. Experiments were performed under anaerobic conditions in the presence of carbonate. The actinides are expected to be present as carbonato or carbonatohydroxo complexes. Effective diffusivity (De) obtained were (4.0 ± 1.5) × 10−13 m2 s−1 for neptunium and (2.0 ± 1.6) × 10−13 m2 s−1 for plutonium. Effective diffusivities of neptunium and plutonium in granite were estimated based on the pore diffusion model and compared with the experimentally obtained values.
Received: 2001-12-3
Accepted: 2002-5-24
Published Online: 2009-9-25
Published in Print: 2002-12-1
© Oldenbourg Wissenschaftsverlag, München
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Articles in the same Issue
- 239Pu and 241Am (n, 2n) cross-section measurements near En = 14 MeV
- Radiochemical studies relevant to the production of 86Y and 88Y at a small-sized cyclotron
- Berkelium redox speciation
- Solubility product of plutonium hydrous oxide and its ionic strength dependence
- Effective diffusivity of neptunium and plutonium in granite from Inada, Ibaraki, Japan under anaerobic conditions
- Theoretical predictions of hydrolysis and complex formation of group-4 elements Zr, Hf and Rf in HF and HCl solutions
- Evidence for the existence of Tc(IV) – humic substance species by X-ray absorption near-edge spectroscopy
- Measurement of L3 to M shell vacancy transfer probabilities of Th and U
- Radiochemical neutron activation analysis of trace impurities in high purity titanium and tungsten
- Thermochromatography of 241Am and 254Es in chlorinating carrier gases
