** Shares of Australia's Duratec DUR.AX rise as much as 7.1% to A$2.86, logging its biggest intraday pct gain since Jan. 8
** The protection and refurbishment services contractor along with joint venture partner Ertech, receives A$281 mln ($200.18 million) contract
** Says contract for infrastructure upgrades to support future submarine capability at Australian navy base, HMAS Stirling on Diamantina Wharf
** Stock up 47% YTD
($1 = 1.4037 Australian dollars)
(Reporting by Aamir Sheik Khalid in Bengaluru)
((Aamir.SheikKhalid@thomsonreuters.com))