[labnetwork] Silane quantity

[Matthieu Nannini, Dr.]

Bob:

Fully agreed. Most large spectacular accidents that scare the hell of EHS dept. (at least mine) when they google « silane safety » are from large PV solar factories where bottle changes occur much more often that in our academic fabs. As such, danger there might be underestimated. So smaller quantities leading to more bottle changes might very well be less secure.


Matthieu


Le 2015-01-07 à 14:32, Bob Hamilton <roberthamilton at berkeley.edu<mailto:roberthamilton at berkeley.edu>> a écrit :

Fab Colleagues,

I'll add, as a general policy about gas cylinder safety, given modern gas cabinets, toxic gas monitoring systems and orbitally-welded distribution the most likely time for a corrosive, pyrophoric or toxic gas incident to occur is during a cylinder change-out.

My statement draws on presentations by Eugene Ngai who is often described as the "silane guru". Retired chemical eningeer Eugene Ngai has done an excellent job of documenting silane incidents and safety practices.

Arguing for smaller quantities of dangerous gases is in many cases an argument for less safety.

Bob Hamilton


--
Robert Hamilton
University of California at Berkeley
Marvell NanoLab
Equipment Eng. Mgr.
Room 520 Sutardja Dai Hall
Berkeley, CA 94720-1754
bob at eecs.berkeley.edu<mailto:bob at eecs.berkeley.edu>
Phone: 510-809-8600
Mobile: 510-325-7557 (Emergencies only poor cell phone service in lab)e-mail preferred



On 1/7/2015 9:04 AM, Dennis Schweiger wrote:
Matthie,

good morning.  Here at UofMichigan, we have two cylinders on-line, both are about 40 cubic feet.  We also have a single spare cylinder in storage.  Our current cadence for change-out is about every 8 months.  It can vary +/- 2 months with usage.

Dennis Schweiger
University of Michigan/LNF

734.647.2055 Ofc

On Tue, Jan 6, 2015 at 4:30 PM, Matthieu Nannini, Dr. <matthieu.nannini at mcgill.ca<mailto:matthieu.nannini at mcgill.ca>> wrote:
Dear colleagues,

first of all, happy new year to all of you ! May the force be with you all !

My EHS dept. would like to compare quantity of silane on site in different labs. So, if you can spare 30s to answer those 2 questions then you can go chasing the student that left the evaporator at atmosphere during christmas:
- how much silane do you use yearly ?
- what is the cylinder volume you have ?

cheers

Matthieu
McGill Nanotools
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