I just had a question about something I saw about the Three Mile Island incident in Pennsylvania during 1979. A foreman went into reactor building number 2 on the 3rd day and extracted some of the coolant that circulates in the reactor. He held up the beaker to the light only to see it had turned yellow and it was vibrating. I was wondering why it would be doing either. I have a few ideas but nothing solid, no pun intended. I know uranium was used to dye things yellow such as in glass and plastics, but don't think water would have the same reaction. There was only 50% left of the reactor, the rest had been vaporized, so the casts had been exposed to the coolant. The vibration of the beaker also brings up questions, does anyone have a clue.