The injury has kept him out of the Tigers’ squad for this week’s game with Wigan.
“Sunday was a pretty tough effort from Scott,” Powell told his club’s official website.
“He’s just as tough as teeth and I thought he was awesome in the game, he was fantastic for us.
“He only had a scan yesterday and we expect him to be out for a week.”
Powell also warned fans to expect more changes, with several players returning to action, though others were likely to be missing.
“There will be a few changes to our squad with a few players a little bit busted,” he added.