Gun HV cable disconnected
After applying my personal lock to the gun HVPS breaker (Panel 1B-PP3, ganged breakers 13,15, and 17) already LOTO'ed by SSG, I proceeded to disconnect the HV cable from the HVPS end first, and then from the gun.
I showed Jessica the steps in the procedure.
The 350kV termination end of the HV cable was removed from the HVPS, cleaned off the silicon greased, and wrapped in plastic. The HVPS receptacle was also cleaned and capped with lint-free wipes and aluminum foil.