Silane TGO alarm activated during cylinder change

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-------- Original Message --------

Subject:	[snf-irteam] IRT update
Date:	Tue, 16 Jul 2013 11:59:51 -0700
From:	Ted Berg <tberg@stanford.edu>
To:	snf-irteam@lists.stanford.edu

Hello All,
    just a quick update on our incident this morning. At approximately 9:10 am, two of our staff were changing a 5% silane cylinder believed to be empty. When the high pressure vent was opened the TGO sensor was triggered. The alarms were silenced and acknowledged. As it turns out the cylinder was not empty it was a malfunction of a solenoid in the controller that had been shut down on Saturday and did not respond to the reset and thus the line was drained.Once the solenoid was activated bottle pressure came up to normal.
    In the process of trouble shooting this issue we discovered that the burn box for the gas panel vents was malfunctioning so we are shutting it down to troubleshoot. That means No Cylinder changes in 115X until burn box is resolved. Ted