On Friday Aug 31 at approximately 3am T1CS:FGSEC dropped to 0gpm flow.  This was confirmed to be a real reading when T1CS temperatures continued to rise steadily.  Beam was turned off, and T1CS later turned off by operators (temps continued to rise due to heat from pump).  The cooling package was uncovered in the morning, and the T1CS:SVSEC solenoid was replaced by Doug Preddy and Keith Ng.  This solved the problem and the package was restarted and then covered.

This is the latest of several failures of these new solenoids at T1/T2 since installation in the 2016 winter shutdown.  It is suspected that the "enhanced electronics" in this model of the valves is vulnerable to damage from radiation.  ASCO does not carry 24V DC valves in their "General Service" line which does not have the enhanced electronics.  Valves from other suppliers are being investigated.  If a suitable 24V DC model cannot be found then we can revert to the 110V AC ASCO valves which we know are reliable.  This will require relays and wiring to be done by electricians.