Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Transport properties of C and O in UN fuels
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.
KTH, School of Engineering Sciences (SCI), Physics, Reactor Physics.ORCID iD: 0000-0002-2381-3309
(English)Manuscript (preprint) (Other academic)
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-202550OAI: oai:DiVA.org:kth-202550DiVA, id: diva2:1077328
Note

QC 20170228

Available from: 2017-02-27 Created: 2017-02-27 Last updated: 2017-02-28
In thesis
1. Multiscale modeling of nitride fuels
Open this publication in new window or tab >>Multiscale modeling of nitride fuels
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Nitride fuels have always been considered a good candidate for GENIV reactors, as well as space reactors, due to their high fissile density, highthermal conductivity and high melting point. In these concepts, not beingcompatible with water is not a significant problem. However, in recent years,nitride fuels started to raise an interest for application in thermal reactors,as accident tolerant or high performance fuels. However, oxide fuels havebenefited from decades of intensive research, and thousands of reactor-years.As such, a large effort has to be made on qualifying the fuel and developingtools to help assess their performances.In this thesis, the modeling side of this task is chosen. The effort istwo-fold: determining fundamental properties using atomistic models andputting together all the properties to predict the performances under irradi-ation using a fuel performance code. The first part is done combining manyframeworks. The density functional theory is the basis to compute the elec-tronic structure of the materials, to which a Hubbard correction is added tohandle the strong correlation effects. Negative side effects of the Hubbardcorrection are tackled using the so-called occupation matrix control method.This combined framework is first tested, and then used to find electronic andmechanic properties of the bulk material as well as the thermomechanicalbehavior of foreign atoms. Then, another method, the self-consistent meanfield (SCMF) one, is used to reach the dynamics properties of these foreignatoms. In the SCMF theory, the data that were obtained performing the abinitio simulations are treated to provide diffusion and kinetic flux couplingproperties.In the second step of the work, the fuel performance code TRANSURA-NUS is used to model complete fuel pins. An athermal fission gas releasemodel based on the open porosity is developed and tested on oxide fuels.A model for nitride fuels is introduced, and some correlations are bench-marked. Major issues remaining are pointed out and recommendations asto how to solve them are made.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. p. 107
Series
TRITA-FYS, ISSN 0280-316X ; 73
Keywords
Uranium Nitride Ab Initio Modelling
National Category
Other Physics Topics
Research subject
Physics
Identifiers
urn:nbn:se:kth:diva-202538 (URN)978-91-7729-182-4 (ISBN)
Public defence
2016-12-16, F3, Valhallavägen 79, Stockholm, 09:30 (English)
Opponent
Supervisors
Note

QC 20170227

Available from: 2017-02-27 Created: 2017-02-26 Last updated: 2017-02-27Bibliographically approved

Open Access in DiVA

fulltext(1784 kB)42 downloads
File information
File name FULLTEXT01.pdfFile size 1784 kBChecksum SHA-512
ed1786c9c4c303210001326f108a2bad6ad75e1d3640227d345fd10650ed3b7960ad95798c9dfce99aee865b15d56ffbb863a8e1fab17f70ca94db2383bd0e19
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Adorno Lopes, DeniseClaisse, AntoineOlsson, Pär
By organisation
Reactor PhysicsKTH
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
Total: 42 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 31 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf