** Shares of Australia's Orpheus Uranium ORP.AX fall as much as 4.3% to A$0.067, set for worst day since January 13

** Uranium explorer receives firm commitments to raise A$4.36 million ($3.06 million) through placement

** Issue price of A$0.062 per share represents a discount of 11.4% to the stock's last close

** Proceeds from the placement to be used for advancing South Australian, Northern Territory and Western Australian projects, others

** About 583,000 shares change hands, 1.8 times the 30-day avg

** Stock is up 34% so far this year

($1 = 1.4253 Australian dollars)

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com;))