** Shares of Pioneer Lithium PLN.AX up 7% at A$0.23

** Lithium explorer enters into binding acquisition agreements for two uranium projects located in the U.S. and Namibia

** Says both projects boast significant uranium potential, with substantial exploration upside identified through historical work

** Stock rose as much as 18.6% earlier in the day, marking its biggest intraday gain since Jan. 14 and hitting its highest level since July 19

** Stock up 12% this year, including day's move

(Reporting by Rajasik Mukherjee in Bengaluru)

((Rajasik.Mukherjee@thomsonreuters.com))