What are these streaks in this Fukushima endoscope video

[omoplata]

Here's the video.

http://www.youtube.com/watch?v=w_iP3ZrIb88

What are those streaks running across the video? I don't mean the specks (which they say is caused by radiation damage to the video) , but the streaks that seem to have a direction. Sometimes they come towards the camera, sometimes they go sideways. Are they ionization tracks made by particles, like in a cloud chamber or bubble chamber?

 

[am242m]

The streaks you see (rather than the noise inherent in the image) are water droplets dripping off the structure and the ceiling within the dry well of the unit.

 

[torquil]

Yep, water. And if for some reason the conditions in there had been like a cloud chamber, those streaks would still be much too slow to be ionization tracks.