An Investigation of Oxide Layer Impact on Heat Transfer in a Fuel Element of the MARIA Reactor

  • Szymon Jerzy Suchcicki Institute of Heat Engineering, Warsaw University of Technology
  • Nikołaj Uzunow Institute of Heat Engineering, Warsaw University of Technology
  • Krzysztof Pytel National Centre for Nuclear Research
  • Władysław Mieleszczenko National Centre for Nuclear Research
  • Alojzy Mołdysz National Centre for Nuclear Research

Abstract

Within the framework of test fuel examination it has been performed the irradiation of one of fuel elements to high level of burnup (ca. 60 %). Post-irradiation examinations proved that under high burnup it comes to local detachment of oxide layer from the fuel element cladding. Unilateral breaking away of the oxide layer of strong insulation properties from cladding surface may lead to disturbance of conditions for heat removal from the fuel. This effect has been numerically modeled by means of ANSYS FLUENT code. The numerical results confirmed the existence of heat flux redistribution in the spot of oxide layer detachment. Since the phenomenon for breaking away of oxide layer appears at high fuel burnup the thermal loads are getting lower than in most thermally loaded fuel elements so the safety margins for fuel operation are being preserved.

References

[1] ANSYS FLUENT 13.0 Documentation, SAS IP, Inc., 2010.

[2] Conversion of MARIA Reactor Core on MC Fuel, Annex 2011/1 to Operational Safety Report for MARIA Reactor, NCBJ, 2011, under editing of K. Pytel (in Polish).

[3] Operational Safety Report for MARIA Reactor, NCBJ, 2009, under editing of K. Pytel (in Polish).

[4] Heat Transfer. Tables and Graphs, WPW, 1991, W. Gogół (in Polish).

[5] Thermal Tables with Graphs, WNT, 1966, Ražnjević K. (in Polish).

[6] An Investigation of Oxide Layer Impact on Heat Transfer in MARIA Reactor Fuel Elements, M.Sc. thesis, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, June 2012, Suchcicki S. (in Polish).

[7] An Introduction to Computational Fluid Dynamics. The finite volume method, Pearson Education Ltd., 2007, Versteeg H.K, Malalasekera W.

[8] Heat Transfer, WNT, 2009, Wiśniewski S., Wiśniewski T. S. (in Polish).
Published
2013-08-27
How to Cite
SUCHCICKI, Szymon Jerzy et al. An Investigation of Oxide Layer Impact on Heat Transfer in a Fuel Element of the MARIA Reactor. Journal of Power Technologies, [S.l.], v. 93, n. 4, p. 247--256, aug. 2013. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/389>. Date accessed: 21 dec. 2024.
Citation Formats
Issue
Vol 93 No 4 (2013)
Section
Nuclear Fuels and Reactor Safety

Keywords

MARIA reactor; oxide layer
Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.