TY - JOUR
T1 - Direct alpha spectrometry for analysing leached ThO2 pellets
AU - Myllykylä, E.
AU - Koivula, L.
AU - Tanhua-Tyrkkö, M.
AU - Helariutta, K.
AU - Lavonen, T.
AU - Ollila, K.
AU - Siitari-Kauppi, M.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - The next generation application of nuclear energy has
shown an interest towards ThO2 or mixed oxides fuels.
However, more knowledge is needed, for example, on the
microstructural and matrix dissolution behaviour of ThO2.
The objective of this study was to examine surface
properties of thick ThO2 pellets by non-destructive alpha
analysis method accompanied with Monte Carlo simulations
before and after a leaching experiment. This study has
been conducted to investigate the contents, and surface
layer thickness of crystalline 232ThO2 pellet leached in
aqueous solution with excess of 229Th tracer in the
beginning of the experiment. The simulation results have
suggested a maximum 0.1 µm concentrated layer of 229Th on
the pellet surface. The presence of this layer suppresses
further dissolution of the pellet.
AB - The next generation application of nuclear energy has
shown an interest towards ThO2 or mixed oxides fuels.
However, more knowledge is needed, for example, on the
microstructural and matrix dissolution behaviour of ThO2.
The objective of this study was to examine surface
properties of thick ThO2 pellets by non-destructive alpha
analysis method accompanied with Monte Carlo simulations
before and after a leaching experiment. This study has
been conducted to investigate the contents, and surface
layer thickness of crystalline 232ThO2 pellet leached in
aqueous solution with excess of 229Th tracer in the
beginning of the experiment. The simulation results have
suggested a maximum 0.1 µm concentrated layer of 229Th on
the pellet surface. The presence of this layer suppresses
further dissolution of the pellet.
UR - http://www.scopus.com/inward/record.url?scp=85020405313&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2017.06.003
DO - 10.1016/j.jnucmat.2017.06.003
M3 - Article
VL - 493
SP - 69
EP - 76
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
ER -