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Open porosity fission gas release model applied to nuclear fuels
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.ORCID iD: 0000-0002-4158-0123
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Nitride fuels have gained a new interest in the last few years as both a candidate for GEN IV reactors and as accident tolerant fuels for current light water reactors. They however are decades behind oxide fuels when it comes to qualication and development of tools to assess their performances. In this thesis, such a tool is developed. The fuel performance codeTRANSURANUS, which has very good results with oxide fuels, is extended to handle nitride fuels. The relevant thermo-mechanical properties are implemented and fuel type dependent modules are updated. Their limitations and discrepancies are discussed. A particular attention is brought to the athermal ssion gas release, and a new model based on the open fabrication porosity is developed and added to the code, as a starting point toward a mechanistic model. It works well on oxide fuels, but its eciency is harder to evaluate for nitride fuels, due to large uncertainties on many key correlations such as the thermal conductivity and the eective diusion coecient of gas atoms. Recommendations are made to solve the most important problems.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. , x, 58 p.
Series
TRITA-FYS, ISSN 0280-316X ; 2015:27
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-168502ISBN: 978-91-7595-620-6 (print)OAI: oai:DiVA.org:kth-168502DiVA: diva2:817088
Presentation
2015-06-15, sal FA32, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20150604

Available from: 2015-06-04 Created: 2015-06-04 Last updated: 2015-06-04Bibliographically approved
List of papers
1. Towards the inclusion of open fabrication prosity in a fission gas release model
Open this publication in new window or tab >>Towards the inclusion of open fabrication prosity in a fission gas release model
(English)Manuscript (preprint) (Other academic)
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-168563 (URN)
Note

QS 2015

Available from: 2015-06-04 Created: 2015-06-04 Last updated: 2015-06-04Bibliographically approved

Open Access in DiVA

Thesis(624 kB)267 downloads
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