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Dryout predictions in bwr fuel assemblies with spacers
KTH, Superseded Departments, Physics.
KTH, Superseded Departments, Physics.ORCID iD: 0000-0001-5595-1952
2004 (English)In: Proceedings of the Sixth International Conference on Nuclear Thermal-Hydraulics, Operation and Safety, 2004Conference paper (Refereed)
Abstract [en]

A new spacer model has been implemented into the subchannel code Mona-3 and validated against dryout experiments in various rod bundles with different number of spacers and different spacer designs. The spacer-induced deposition enhancement is captured by proper modeling of the turbulence intensity downstream of a spacer.

The Mona-3 code with the new spacer model captures spacer effects in a correct manner. Both the effect of the number of spacers and the effect of the spacer design are predicted correctly. In particular, the critical power difference between 24-rod bundles with 6 and with 7 spacers is measured to be larger than the difference between 25-rod bundles with 6 and with 7 spacers. This experimental finding is well captured with the Mona-3 code with the present spacer model.

Place, publisher, year, edition, pages
Keyword [en]
Dryout, mechanistic, spacer, subchannel, BWR
National Category
Energy Engineering
Research subject
SRA - Energy
URN: urn:nbn:se:kth:diva-79203OAI: diva2:495230

QC 20130226

Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2013-02-26Bibliographically approved

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