MRS2017 - Scientific Basis for Nuclear Waste Management Symposium 2017

Session

Radionclide solubility, speciation, sorption & migration

2 Nov 2017, 11:00

75. Apparent Diffusion Coefficients Consistent with Sorption Derived Based on Changes in Depth Profiles of Radiocaesium in Soil Contaminated by the Fukushima Nuclear Accident and Future Prediction of Depth Profile

Prof. Haruo Sato (Okayama University)

02/11/2017, 11:00

National and international collaborative waste management programs

Oral Presentation

H. Sato and M. Yoshii, Okayama University, 3-1-1, Tsushima-naka, Kita-ku, Okayama-shi, Okayama 700-8530, Japan The accident at the Fukushima Daiichi Nuclear Power Plant occurred following the Great East Japan Earthquake in March 2011, and led to the release of volatile radionuclides (RNs) which were deposited on the surrounding environment in the Fukushima prefecture. The authors conducted...

35. Investigation of C-14 in the CRUD collected on the coolant filter for safety disposal of radioactive waste containing C-14 (I)- C-14 release behavior and thermal decomposition characteristics of crud particles collected from the coolant filter of commercial PWR -

Mr Kenichiro Kino (Nucler Development Corporation)

02/11/2017, 11:15

National and international collaborative waste management programs

Oral Presentation

In the safety assessment of radioactive waste repository, it is important to evaluate the migration behavior of long half-life radionuclides in the disposal environment. It was reported that insoluble C-14 was generated in PWR. However, the knowledge about the chemical form of C-14 is little. In this study, particles including C-14 collected from the coolant filters in PWR were analyzed by...

39. Investigation of C-14 in the CRUD collected on the coolant filter for safety disposal of radioactive waste containing C-14 (II) –Chemical alternation of ion exchange resin under simulated condition in primary coolant of PWR –

Dr Kotaro Nakata (CRIEPI)

02/11/2017, 11:30

National and international collaborative waste management programs

Oral Presentation

Radiocarbon (C-14) is recognized as a radionuclide that includes significant impact on public exposure in safety assessment of radioactive waste disposal. Its origin, generation mechanism and chemical forms in the wastes are required to be understood for the reasonable and proper safety assessment of the radioactive waste disposal. Some previous studies have reported occurrence of insoluble...

59. Digital autoradiography on C-14 labelled PMMA impregnated rock samples using the Beaver$^{TM}$

Dr Mikko Voutilainen (Department of Chemistry, University of Helsinki, Finland)

02/11/2017, 11:45

National and international collaborative waste management programs

Oral Presentation

In Finland and Sweden KBS-3 concept has been chosen for disposal of spent nuclear fuel in crystalline rock. Recent transport experiments have shown that heterogeneity of rock may play a major role in transport of radionuclides. Autoradiographic methods has been proven to be able to assist the characterization of heterogeneous structures. In this study we tested a novel digital autoradiographic...