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

• Autorzy: Suchcicki J. , Uzunow N. , Pytel K. , Mieleszczenko W. , Mołdysz A.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

MARIA reactor; oxide layer

PL

reaktor Maria; warstwa tlenku

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2013
• Tom: Vol. 93, nr 4
• Strony: 247--256
• Opis fizyczny: Bibliogr. 8 poz., rys., wykr.

Twórcy

autor

Suchcicki J.

• Institute of Heat Engineering, Warsaw University of Technology, Poland

autor

Uzunow N.

• Institute of Heat Engineering, Warsaw University of Technology, Poland

autor

Pytel K.

• National Centre for Nuclear Research, Poland

autor

Mieleszczenko W.

• National Centre for Nuclear Research, Poland

autor

Mołdysz A.

• National Centre for Nuclear Research, Poland

Bibliografia

• [1] NCBJ, Conversion of MARIA Reactor Core on MC Fuel, Annex 2011/1 to Operational Safety Report for MARIA Reactor, k. pytel Edition, in Polish (2011).
• [2] S. Suchcicki, An investigation of oxide layer impact on heat transfer in maria reactor fuel elements, Master’s thesis, Faculty of Power and Aeronautical Engineering, Warsaw University of Technology, in Polish (June 2012).
• [3] W. Gogół, Heat Transfer. Tables and Graphs, WPW, 1991, in Polish.
• [4] K. Ražnjevi´c, Thermal Tables with Graphs, WNT, 1966, in Polish.
• [5] SAS IP, Inc., ANSYS FLUENT 13.0 Documentation (2010).
• [6] Operational Safety Report for MARIA Reactor, k. pytel Edition, in Polish (2009).
• [7] H. K. Versteeg, W. Malalasekera, An Introduction to Computational Fluid Dynamics. The finite volume method, Pearson Education Ltd., 2007.
• [8] S. Wiśniewski, T. S. Wiśniewski, Heat Transfer, WNT, 2009, in Polish.