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Reports until 16:19, Tuesday 14 December 2010
LHO FMCS
kyle.ryan@LIGO.ORG - posted 16:19, Tuesday 14 December 2010 (412)
Praxair deliveries
(Y-end)  I noticed early in the afternoon that the dewar pressure following the delivery to Y-end (CP7) this morning was way too high, i.e. 42 psi (nominal is 15 psi).  The driver may have neglected to open the manual relief valve to allow for the displaced vapor to be relieved as the liquid column was rising while filling -> I had to travel partially offroad to get to the Y-end station (wind gusts were causing a rapid accumulation of tumbleweeds) in order to manually open a pressure relief valve in order to correct.  CP7 overfilled as a result of the change in relationship between %open of the control valve and resulting liquid flow.  

Operator: expect CP7 alarms over the next 24 hours.


(X-mid)  The wind gusts increased significantly during the ~60 minutes that the X-mid (CP5) tank was being filled.  The rapid buildup of tumbleweeds along the X-arm effectively prevented the Praxair truck driver from being able to leave!  Luckily I was able to solicit the help of Hugh, Corey, Mitchell, Chris, Joe, Zack, Rodney and Ski who helped clear a path using pitchforks and walking in front of the truck the entire distance from the X-mid to the Corner Station!!!  
Displaying report 1-1 of 1.