** Silex Systems SLX.AX rises as much as 6.1% to A$5.61, highest since March 16
** Uranium enrichment tech co says unit Global Laser Enrichment (GLE) selected for award of up to $28.5 million from US Department of Energy
** Says award for advancing laser-based uranium enrichment technology
** Adds unit receives approval from Commonwealth of Kentucky and McCracken County
** Approval to receive up to $98.9 million in tax and economic incentives for development of planned Paducah Laser Enrichment Facility in Kentucky
** Stock up 7.3% so far this week, set for best week since early February
** Despite moves, SLX down 35% YTD
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))