Dear All,
Does anyone have an SOP for force quenching a magnet? Yes I can’t believe I’m asking that ….
We’re looking at a decommissioning procedure for a magnet where either the control/power stick is not available or the pins at the bottom are damaged (i.e. can’t tap in to control the de-energization).
Wondering if anyone has written up and summarized items needing to be checked before and during the event?
e.g.
contact fire and security
arrange for emergency fans to be running or set up portable fans to move helium outside
schedule a time away from normal hours (e.g. weekend evening)
warn the department/workers well in advance and provide hazard information
signs in all corridors warning people away
other things?
etc.
Items I’d really appreciate experience on:
Full or minimal helium content?
-is it safer to let helium run so low it quenches (uncontrolled time) or spoil the vacuum and pull out cryogens (controlled)?
Full or empty N2?
The situation is to decommission and dispose of the magnet, so safely quenching for later use is not an issue.
I’d greatly appreciate your experience, advice and suggestions,
Ryan
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Ryan T. McKay, Ph.D.
NMR Laboratory Supervisor
Room E3-17A Email: ryan.mckay_at_ualberta.ca <mailto:ryan_at_nanuc.ca>
Department of Chemistry Phone: (780) 492-9950
University of Alberta Fax: (780) 492-8231
Edmonton, Alberta Cell: (780) 920-8871
Canada T6G 2G2
http://www.chemistry.ualberta.ca
Received on Fri Jul 31 2015 - 09:21:03 MST