You didn’t know, you guessed. Sorry, I’m not letting you off the hook for such a guess without more warnings that you really don’t know posted with it.
Quit being so pissy. You asked when they refueled last, and I took a guess based on the factoid of the unit 1 being scheduled for shutdown at the end of this month. It was clearly stated as a quess.
If you don't like my answers, then just skip the hell past them.