Hamidouche, TewfikRassoul, NouaraSi-Ahmed, El-KhiderEl Hadjen, HakimBousbia-salah, Anis2015-06-302015-06-30200901491970https://dspace.univ-boumerdes.dz123456789/2141enDrift-flux modelLedinegg instabilityMTR research reactorOnset of flow instabilityPressure dropSafety marginsSimplified numerical model for defining Ledinegg flow instability margins in MTR research reactorArticle