Yes, I heard about this shortage on the news yesterday, which mentioned that three other smaller nuclear installations making this stuff were or would also shut down for maintainance at roughly the same time, leaving the only installation still able to generate this a Dutch reactor in Petten. Which was news to me, but apparantly in normal times it supplies roughly 30 percent of world demand, with the Chalk River reactor supplying about the same amount. So you only got half a dozen manufacturers for these essential products.