Change search
ReferencesLink to record
Permanent link

Direct link
A feasibility study of coolant void detection in a lead-cooled fast reactor using fission chambers
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. (Nuclear Fuel and Nuclear Data)
2012 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

One of the future reactor technologies defined by the Generation-IV International Forum (GIF) is the Lead-Cooled Fast Reactor (LFR). An advantage with this reactor technology is that steam production is accomplished by means of heat exchangers located within the primary reactor vessel, which decreases costs and increases operational safety. However, a crack in a heat exchanger tube may create steam (void) into the coolant and this process has the potential to introduce reactivity changes, which may cause criticality issues. This fact motivates the development of a methodology to detect such voids. This thesis comprises theoretical investigations on a possible route to detect voids by studying changes of the neutron spectrum in a small LFR as a function of various types of in-core voids .The methodology includes a combination of fission chambers loaded with U-235 and Pu-242 operating in various positions. It is shown that such a combination results in information that can be made independent on reactor power, a feasible property in order to detect the relatively small spectral changes due to void. A sensitivity analysis of various combinations of detectors, fuel burnup and void has also been included in the investigation. The results show that the proposed methodology yields a reasonably large sensitivity to voids down to (1-2) % of the coolant volume. The results obtained so far point in the direction that the proposed methodology is an interesting subject for further studies.

Place, publisher, year, edition, pages
Uppsala: Uppsala University, Department of Physics and Astronomy , 2012. , 50 p.
Keyword [en]
neutron monitoring spectrum fast reactor fission chamber coolant void
National Category
Accelerator Physics and Instrumentation
Research subject
Applied Nuclear Physics
URN: urn:nbn:se:uu:diva-191701OAI: diva2:586250
Available from: 2013-01-11 Created: 2013-01-11 Last updated: 2013-01-11Bibliographically approved

Open Access in DiVA

Peter Wolniewicz Lic Thesis(4482 kB)784 downloads
File information
File name FULLTEXT01.pdfFile size 4482 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Wolniewicz, Peter
By organisation
Applied Nuclear Physics
Accelerator Physics and Instrumentation

Search outside of DiVA

GoogleGoogle Scholar
Total: 784 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

Total: 558 hits
ReferencesLink to record
Permanent link

Direct link