~1100 hrs. local. 
Noticed LN2 boil-off vapor eminating from backside of CP1 dewar piping (i.e. not normal location) -> Investigation revealed the following: Indicated dewar head pressure @ 42 psi (nominal is < 20 psi).  The transfer line pressure relief valve was popped open and LN2 was being released onto the ground.  Found that the dewar pressure relief circuit was closed (manual valve was closed).  Also, the LLCV needle was fully closed even though CDS indicated needle was 20% open. -> I opened the deware pressure relief valve to vent the dewar head pressure through the economizer valve (i.e. returned to normal configuration).  I switched CP1 LLCV from PID to manual control @ 50% open and confirmed that LLCV would stroke open and closed with the instrument air valved in and out etc..  I then returned control back to PID and confirmed that the CDS output corresponding to 20% open really corresponds to the valve being 0% open.  

Conclusion:  The Praxair driver had likely closed the dewar head pressure relief (manual isolation valve) for some reason??? while filling on Tuesday and forgot to open it before leaving.  This would cause the head pressure to begin increasing.  The %open output of the CDS PID loop would then begin to ramp closed  Eventually, the LLCV would be closed.  Now the total pressure, head pressure + weight of liquid column, would increase until the transfer line pressure relief valve popped open.  It will take a day or two for the head pressure to get back to < 20 psi venting only through the economizer circuit.  The normal pump level swings will likely result due to the "warm" portion of the transfer line piping once the LLCV actually starts to open.  

Door Access Alarms
09:15am - Large equipment access door alarm. Dani reports the sensor that reads the status of the door ist kaput.  

Major Activities:
~10:30 - removal of HAM10 north door	
12:05 - removal of HAM10 passive stack
done by ~3:30

No other work in the LVEA today.

(Carolyn P., Corey G., Jodi F., Joe D., Justin B., Mitchell R., Rodney, Zach)

Once the north door for HAM10 was removed, an SEI crew began work for removing HAM SEI hardware.  This was similar to the HAM7-9 work, but For this task, we were required to keep all the hardware clean, and store it (for later re-use).

This work went very smoothly (the duration of the job was around ~3hrs).  All of the hardware is being stored in the north bay of the LVEA (see photo).  A note about the big stuff:

Optics Table is resting on one pallet.  If it needs to be moved, one will either need to basket the Table with straps and use the crane (or one will need to re-attach the Optics Table Hoist Plate and the forklift).  

For the Leg Elements (masses), we foiled one of each mass, and put both of them in an Ameristat bag (so we four stacks of masses on a pallet).  So, it should be noted that these two masses are "loosely" packed in their bags---so be careful, if these ever need to be crated over the beam tube.

All of the small stuff (washers, springs, screws, etc.) are bagged and resting on top of the Optics Table.

Yesterday 01/04/11, we removed 425g of addable mass from the Main Chain UI mass on Quad 2. The remaining addable mass (114g on the top and bottom Turrets, total 228g) was placed to reestablish symmetry on the UI. The Quad is now sitting at 20.5mm above the LS frame. The Quad has been rebalanced and aligned. Mark Barton is running transfer functions.        

Nothing major today. Toyota forklift moved out of the high bay and craned over the beam tube. Cyrus working on phone systems at the end stations.

No major work today. We were also expecting several large deliveries for SEI (Hugh, to go to the warehouse) but none of them arrived today.

Ice accumulation on exposed portion of LLCV needle valve needle not applicable to CP2's recent misbehaviour.  Instead, the pneumatic actuator box required thawing via the heat gun.  As found, the needle was stuck in it's nominal position (~15% open) and wouldn't stroke when >nominal open settings were selected (in manual control mode) or stroke closed with the instrument air valved out.  With the actuator thawed, now the needle strokes freely through 0-100% settings.  

CP1 is working at this time but was probably experiencing a similar problem yesterday.

Probably ice accumulation on exposed portion of LLCV needle valve preventing valve from stroking closed (or not).  I'll be in today anyway for unrelated reason.  I'll investigate CP1 and CP2.

CP1 and CP2 (corner station) "out-of-whack" for some reason. Am monitoring from home.

I Turned on one stage of heat as it was getting kinda cold out there.

Removed all components for RM and BS optical levers.
Removed most of the components for FMY and ETMY, piers still need to be removed.
Also removed laser boxes for ITMY and FMX.

After the removal of optical lever components, the uncovered view-ports were covered with view-port covers, bright yellow ones.

I tried to get all the seismometers into the frame, but I'm hitting
a recurrence of the 5579 RFM problems which means I cannot get all the
ADCUs up and running. It is not reproducible, I was able to run h1adcuex
earlier, but cannot get it running now.

So what is running:
h1adcuey,h2adcumx,h2adcumy

What is not running (stuck at waiting for RFM data)
h1adcuex,h1adcusus,h1adcupem.

I tried the usual power cycle of:
5579RFM vme crate
h1dcuepics
h1awg0
h1iscex and the stuck adcus

but to no avail. So will run for now with just 3 of the 6 seismometers going.

Saw smoke at end of X arm, Gerardo called it in, this is a controlled burn by hanford fire dept.

photo shows the smoke.

Here is a picture of the X-arm, the vit plant is beginning to dominate the view.

Couldn't remote login to blue on Saturday (Christmas day).  Still couldn't remote login on Sunday morning->Came on-site to status 80K pump levels etc., Dave B. already on-site.  Had power loss Friday morning->Restarted MTPs @ X-end and Vertex-OK now->Toured buildings, chiller yards, LN2 dewars, Fire pump room, water room etc->Vacuum/VE OK.  Found VFD controller for "Supply" fan on AHU-2 in LSB had tripped->Reset but VFD tripped on "OVERLOAD" shortly after trying to spin-up fan->switched to "BYPASS" and let controller spin-up fan then switched over from BYPASS position->OK now.  

Misc.->CP7 dewar vapor pressure still 0 psig->Adjusted economizer regulator adjusting screw 1 full turn cw.  

There is no data between these two times due to the site power glitch:

Dec 24 07:11 H-R-977238656-32.gwf
Dec 26 13:44 H-R-977435040-32.gwf

We had a 3 second power glitch at 07:11 Friday 24th December 2010.
LDAS cluster rebooted itself. Some GC servers needed restarts.

On the iligo CDS system, I had to restart fb0c, fb0w, nds0,
silverstar, apache, wiki, hanford5, h0epics[0-3] projector[0,1]

On the fmcs system I have to restart both HP PCs in the control room,
control9 and the fmcs epics software.

Toured through Mid and End buildings, chiller yards and dewars.  

Vapor pressure for CP7 LN2 dewar still 0 psig->Fully closed economizer regulator adjusting screw, tapped regulator body, turned out adjuster screw 6 turns ccw.  Also, closed QDP80 shaft purge (LN2 boil-off) valve at QDP80.  

Leaving early, but this is what's happened so far

Gerardo at MY uninstalling the optical lever
Oscar baling tumbleweeds on the x-arm
RO water sampling

Kyle, Ski, Chris, Joe-> Hung HAM12 South and North doors.  

Kyle->Adjusted Diagonal Volume's purge air setting (all doors on, 7 with only (4) bolts).  

Kyle->Valved-out and shut-down GV10 annulus aux. pump cart.

Kyle->Replaced 0-100 psi gauge at Y-end LN2 dewar (damaged dial face).  Also, noticed that 2 of 2 gauges indicating 0 psi for vapor pressure (see problem following last LN2 delivery)->Closed economizer (vapor pressure regulating) valve 1/2 turn cw.  Note steadily increasing %open response for CP7 LLCV.  Nearly 100% open.  Will loose ability to control CP7 level without aid of some vapor pressure to add to the liquid column weight.