Call in for a VESDA alarm in Hall A
Noted that the sensors in the dome and south wall were highest and the the septum had tripped off
Entered the Hall after a full sweep in controlled access after looking at the radiation map
Went to the big box power supply to start with and noted that the power was off.
Looked at the HKS and noted that it was faulted
Went to the switch gear to check the CB for Big Box and found it tripped.
Called MCC to shut down FZ magnets
Dave Kausch entered the Hall.
Jack and Tim Minga enter Hall
Left Hall to go to restricted access.
Target group locked out target power supply and I went to get the key to the security gates
While I was gone the others noted soot at the top of septum
Locked out all power supplies
Opened gates and found damage to the power connection on the top of the right side of septum.
See Jacks write up
Informed Run coordinator and Hall leader of status and recommended that we hold further operations until Monday for Radcon clearance and a thorough investigation.
Re-locked security gates