Well if there is a total news blackout then there won't be a detailed denial, IMHO. For, on the linked page, OPPH claims much more than inaccurate terminology. The most essential:

• They say the 'Level 4' was a Notification of Unusual Event (NOUE - this is the lowest level on a four-level scale), namely a warning of Missisippi floodwaters expected to reach a certain level, which was issued on 6 June, three days before the prediction came true and that level was actually reached.
  
• Regarding the spent fuel pool, they admit that one cooling pump lost power due to a fire (on 7 June, two days before the waters reached the NOUE level), but claim the automatic fire extinguisher worked and power to the pump was re-gained after 90 minutes, until when the pool temperature increased only "a few degrees".
  
• The above event was actually subject to a higher emergency level, an Alert (that is the second-lowest level of that four-level scale), which was called off three and a half hours later.

Based on this, it would appear someone is engaging in scaremongering.

_{*Lunatic*, n.
One whose delusions are out of fashion.}