A témavezető neve:
Aszódi Attila - tanszéke: Institute of Nuclear Techniques - beosztása: Full Professor - tudományos fokozata: Dr. habil, PhD - email címe: aszodi@reak.bme.hu |
A doktori munka készítésénak helye és címe: Institute of Nuclear Techniques 1111 Budapest, Műegyetem rkp. 9. |
A kidolgozandó feladat címe: Experimental investigation of fluid flow in distorted fuel rod bundle geometries |
A téma rövid leírása, a megoldandó legfontosabb feladatok felsorolása: Analysis of design basis conditions and design extension conditions is a major task in safety analysis of nuclear reactors. Loss of coolant accidents (LOCAs) are postulated initiating events which can lead to fuel pin failures, and in extreme cases to the distortion of fuel bundle geometry. This can cause change in flow field and shift in the efficiency of cooling conditions within the reactor core. In the Fuel and Reactor Materials Laboratory of ELKH Centre for Energy Research there are experiments underway in which inactive fuel pin bundles are brought to LOCA conditions and real fuel pin cladding tubes are suffering damages similar to accidental ones. Later three dimensional scanning will be applied to the distorted fuel pin bundles, which will provide with 3D numerical data on that irregular fuel geometry. This geometrical information could be used for further experimental and numerical thermal-hydraulics studies. Particle Image Velocimetry (PIV) is a state-of-the-art non-intrusive optical flow measurement method based on the recording images of the movement of flow-following particles added to the liquid in the investigated flow domain. PIV is in use at BME Institute of Nuclear Techniques (NTI) since 2007, and has been applied for such investigations as coolant mixing in Allegro fuel bundles, heat transfer of the fuel rod of the training Reactor or thermal-hydraulics characteristics of the MSFR molten salt reactor concept core. The data provided with PIV measurements will support the deeper understanding of flow behavior in the investigated geometries, and serves as basis for computer code validation. The verification and validation of three dimensional Computational Fluid Dynamics (CFD) codes is especially relevant. The major objective of this PhD research is to deliver new CFD-grade experimental data for distorted fuel bundle geometries and which would be applicable for the validation of CFD codes and other relevant models. Further task in the PhD research is to enhance the evaluation methods and tools used for PIV measurement data processing. The PhD candidate would perform the following tasks:
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Nyilatkozat: A fenti munkahelyen a javasolt témában kutatás feltételei biztosítottak, a téma meghirdetését a munkahelyi vezető jóváhagyta. |
Budapesti Műszaki és Gazdaságtudományi Egyetem Természettudományi Kar |
1111 Budapest, Műegyetem rakpart 3. K épület I. em. 18. www.ttk.bme.hu |