Would this not make a total sense if you assumed that Ukrainians wanted to get Russians out of Chernobyl and what not better way than having Russian soldiers read news that radioactivity in the area is at all time high? Secondly, a news in the West that Russians are possibly messing up with nuclear infrastructure would only encourage support for Ukraine.

In this context seems like a win/win situation for Ukraine. The might loose some credibility but if a true disaster happens independent inspectors can be flew in on day's notice and take measurements.