[labnetwork] Cleanroom Safety

[Bill Flounders]

Re Fire Extinguishers:

Berkeley selected a Class ABC clean room compatible fire extinguisher.
The main issue with these units is the 'fill agent'.
These were filled with halon in the past.
However, due to its ozone depleting properties
Halon 1211 (CF2ClBr) is no longer manufactured (as of 1994).
The material is reclaimed and there are some stockpiles,
however, it has become steadily more expensive.

Halotron1 (CF3CHCl2) is a less ozone depleting compound
developed as an alternative to halon 1211, but it is scheduled
for production halt in 2015.

The non-ozone depleting, non toxic, proven effective halon
and halotron replacement is FE-36. It is not scheduled for phase
out and as it becomes the standard its price has stabilized and begun
  to come down.

All these "clean agents" discharge as a liquid, have high visibility 
during discharge,
do not cause thermal or static shock, leave no residue and are 
non-conducting.
These properties make them ideal for computer rooms, clean rooms,
telecommunications equipment, and electronics. But these superior 
properties of
halon, halotron and FE-36 come at a higher cost relative to carbon dioxide
- several hundred dollars each.

Bill Flounders
UC Berkeley


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>
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>
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>
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>
> 1.) what kind of fire extinguisher are you using in your Cleanroom 
> (Gas,Water,Powder etc...) and which one is the best solution
>
> 2.) How do you ensure the safety of hazardous gases 
> (silane,chlorine,Ammonium)
>
> 3.) How do you ensure personal safety when working with hazardous 
> gases (fireman's suit and scuba mask)
>
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>
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>
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>
>
>
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