Warships are also generally radiologically shielded and can still operate in a radioactive area. As long as the channels were relatively clear, and locks operational (or quickly repairable to a semi operation state), warships should be able to make the passage.
Civilian ships on the other hand are a totally different matter, with crews possibly dying from radiation before completing the passage.
Just because the Virginia was ordered to go through the canal doesn't mean there were no nukes.
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If it moves, shoot it, if not push it, if it still doesn't move, use explosives.
Nothing happens in isolation - it's called "the butterfly effect"
Mors ante pudorem
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