4 ms·

How does an "emergency" shutdown button get that dirty? That looks heavily used.

• steckerbrett 11y ago
  Other photos of SCRAM buttons show signs of wear too, from my limited knowledge I think a SCRAM is also used in normal operating procedure as a rather extreme "off" button. https://en.wikipedia.org/wiki/Scram#/media/File:NS_Savannah_SCRAM_MD1.jpg https://en.wikipedia.org/wiki/Scram#/media/File:NS_Savannah_...
• swamp40 11y ago
  The SCRAM button in that photo is from the EBR-1 breeder reactor in Idaho. It got pushed once in 1955 by a supervisor who had to jump over the table to hit it, because the employee in charge of the panel was chatting on the phone with his wife. It was hit too late though, and half the core melted down. (That's particularly bad for breeder reactors, because it can cause a nuclear explosion.) Ironically, the entire chain-of-events was precipitated by a different wrong button being pressed.