Probably not. There will be steam, and not much of that. Otherwise the water blast produces a column of water that rains back almost immediately. The ship, mostly iron, will not become Strontium 90 or Iodine 131. The ship will mostly be broken, fragmented, but not vaporized.
Depending on the size of the device, a significant amount of metal can be vaporized and spread with the cloud. In the Nevada tests of the 50’s they started suspending the larger devices (such as Hood) from balloons instead of towers.