<!-- Title: 01:16:00  Mon May 17 2004 -->
<!-- Crewchief: Dean -->
<!-- Op1: Jim -->
<!-- Op2: &nbsp; -->
<!-- Op3: &nbsp; -->
<!-- Op4: &nbsp; -->
<!-- Op5: &nbsp; -->
<!-- Op6: &nbsp; -->
<!-- Notes: -->
cot chamber o2 reading is 244 ppm


<!-- Date: Mon May 17 01:51:28 2004 -->
o2 alarm on ces chamber the reading is 892 ppm , Bruce  switched to a new co2 trailer and then back to the old trailer 
<!-- Author: Dean -->


<!-- Date: Mon May 17 06:16:48 2004 -->
Cryo and gas readings are normal at this time. The CDF systems checklist and mechanical rooms are also normal at this time.
<!-- Author: Jim H. -->


<!-- Date: Mon May 17 07:52:41 2004 -->
We just received 1450 gallons of LN2.
<!-- Author: Jim H. -->


<!-- Date: Mon May 17 08:14:12 2004 -->
Gas alarm Ar/CO2 trailer. The manifold on the trailer that is not in use is dropping pressure. Bill is going over that way and will bleed down the manifold to 0-psig.
<!-- Author: Jim H. -->
<!-- Comment: Mon May 17 12;08;53 comment by...Bill Noe -->
Finally got a chance to go bleed off the pressure on the offline trailer. Also fixed the door on #500 that was swinging in the breeze.
<!-- Date: Mon May 17 09:24:12 2004 -->
Started an A/E mix into tank #3.
<!-- Author: Jim H. -->
<!-- Comment: Mon May 17 14;06;23 comment by...Jim H. -->
The mix completed ok.
<!-- Date: Mon May 17 10:51:48 2004 -->
Just performed procedure #13 for the COT. The leak rate is 9.0 scfh.
<!-- Author: Jim H. & Warren B. -->


<!-- Date: Mon May 17 11:10:55 2004 -->
I put the HVAC on low for the access.
<!-- Author: Jim H. -->


<!-- Date: Mon May 17 11:28:10 2004 -->
The COT 02ppm dropped from 148 to 123.
<!-- Author: Jim H. -->


<!-- Date: Mon May 17 11:51:16 2004 -->
Rob called and requested to power down the solenoid. It's on the way down.
<!-- Author: Jim H. -->
<!-- Comment: Mon May 17 12;31;48 comment by...Jim H. -->
The solenoid is at 0 amps and the power supply is locked out. The lead flows are in standby.
<!-- Date: Mon May 17 11:57:18 2004 -->
We just received 3800 gallons of LN2.
<!-- Author: Jim H. -->





<!-- Date: Mon May 17 22:14:31 2004 -->
<table border=0><td><tr><td bgcolor=#e0e030><pre>Summary of COT work 
 
Started the day with a procedure 13 and found the system 
to have a leak rate of 9scfh.  This is good news -- its 
the same as we measured on Sunday which means what ever 
problem we had did not relax under single pass flow over night. 
 
We were granted an access and spent about 6 hours leak 
checking the entire system in the collision hall.  We found 
about a dozen leaks all together. All of them fairly small. 
 
There were no leaks of any of the new plumbing installed in  
March.  I checked that system and it is tight from the 1200 ton 
door all the way to both supply and return donuts. 
 
The cap on the West side GMC leaked.  There were a handful 
of blanks on both east and west manifolds that were only finger 
tight.  Those were tightened.  WE also found a few leaks 
up high once we installed the "monkey bars" and climbed out  
to look.   
 
Note, we also saw a "DC level" of flammable gas coming out  
of the 30 degree crack 30 degrees plus and minus of vertical. 
I am assuming this is just from the baggie.  I did not see 
any hot spot on top.  WE saw the same characteristics on both 
sides. 
 
Around 2:30pm, about 2/3 of the way  through the leak check, 
we did a procedure 13 and measured the leak rate.  It had  
dropped from 9 to 8scfh. 
 
We completed the leak check. 
 
Once this was done, we realigned the bubbler to make it more 
vertical and added a bit of oil.  So, comparisons from this 
point on is fruitless.  Dean and I did another leak rate and 
found it to be between 8.5 and 9scfh.  No bubbling at 8.5 
but reasonable bubbling at 9scfh.  THAT IS OUR NEW BASELINE. 
 
Dean and I then removed the exhaust lines from two high side 
pressure relief valves pv-cr-dis-vt1 and vt2.  We cleaned out 
the pipes, put some tape over the vco fitting and then  
measured the volume of gas just after the valve.  We FOUND  
a leak.  ITs not big, but it is definately there on both. 
This would not explain the 4-5 scfh but it is interesting. 
 
Note, that I am still not sure whether we are chasing one or  
two problems.  Is the current 8.5 scfh leak rate, which we think 
is abnormally high related to the increase in oxygen in the 
system.  Maybe but not conclusively.  I am not sure we ever did 
a full leak rate once the entire recirculation modifications were 
complete.   
 
Warren also fixed the filter and that is now tight. 
 
So, how are we leaving things.  WE are back to normal single 
pass flow at 40scfh.  The cold traps are on and working AND 
the current oxygen level is at 63ppm and falling.  We will  
operate the chamber tonight in its protected mode with SL 
1,2,3 off, 4,5 at reduced gain. 
 
Tomorrow we will spend our time verifying that the recirculation 
system is indeed tight and can run for long periods without  
building up substantial oxygen. 
 
Thanks to Dervin, Del and their crews.  Great job today on a  
long and frustrating day! 
 
RR</pre></td></tr></td></table>
<!-- Author: The gang -->


<!-- Date: Mon May 17 22:15:03 2004 -->
added 10 gallon of water glycol to the chw system expansion tank
<!-- Author: Dean -->


<!-- Date: Mon May 17 22:15:34 2004 -->
<pre>Solenoid is at full field once Rob remembers to unlock the 
power supply that HE asked to be locked out.  DOH! 
</pre>
<!-- Author: rr -->


<!-- Date: Mon May 17 23:39:43 2004 -->
<table border=0><td><tr><td bgcolor=#e0e030>I found a leak on the 720 platform the hose from  the supply line to the test chamber was not tight,( it look like a good side leak ?</td></tr></td></table>
<!-- Author: Dean -->