Direct alpha spectrometry for analysing leached ThO2 pellets

E. Myllykylä, L. Koivula, M. Tanhua-Tyrkkö, K. Helariutta, T. Lavonen, K. Ollila, M. Siitari-Kauppi

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalJournal of Nuclear Materials
Volume493
DOIs
Publication statusPublished - 1 Sep 2017
MoE publication typeA1 Journal article-refereed

Fingerprint

pellets
Spectrometry
Dissolution
Mixed oxide fuels
Nuclear energy
spectroscopy
Leaching
Surface properties
dissolving
Experiments
Crystalline materials
mixed oxides
leaching
nuclear energy
surface properties
tracers
surface layers
simulation
aqueous solutions
oxides

Cite this

Myllykylä, E. ; Koivula, L. ; Tanhua-Tyrkkö, M. ; Helariutta, K. ; Lavonen, T. ; Ollila, K. ; Siitari-Kauppi, M. / Direct alpha spectrometry for analysing leached ThO2 pellets. In: Journal of Nuclear Materials. 2017 ; Vol. 493. pp. 69-76.
@article{06760e3729f74943b4118b45e520f17e,
title = "Direct alpha spectrometry for analysing leached ThO2 pellets",
abstract = "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.",
author = "E. Myllykyl{\"a} and L. Koivula and M. Tanhua-Tyrkk{\"o} and K. Helariutta and T. Lavonen and K. Ollila and M. Siitari-Kauppi",
year = "2017",
month = "9",
day = "1",
doi = "10.1016/j.jnucmat.2017.06.003",
language = "English",
volume = "493",
pages = "69--76",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

Direct alpha spectrometry for analysing leached ThO2 pellets. / Myllykylä, E.; Koivula, L.; Tanhua-Tyrkkö, M.; Helariutta, K.; Lavonen, T.; Ollila, K.; Siitari-Kauppi, M.

In: Journal of Nuclear Materials, Vol. 493, 01.09.2017, p. 69-76.

Research output: Contribution to journalArticleScientificpeer-review

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 -