We recently decommissioned a nearly-empty 300 Ultrashield and tried to capture
the quench too. Our system has a ~100 m run of 2" OD pipe before it gets to
the bag, and for the quench we bypassed the domestic-style flow meter too,
but the backpressure was still high enough that the quench valves opened up.
It looks like we managed to collect some of it but the Physics recovery system
we plug into is so massive that we are a rounding error - can't help you with
how effective we were. Either way, the quench valves means the system should
be intrinsically safe. Obviously I would isolate all your other magnets
during this process.
As far as the commissioning of your new magnet goes - make sure you are very
clear with the Bruker engineers that they use the recovery system at all times.
Some of the uh...more experienced engineers still like to use bellows and do
everything by feel, and this does not work well with the recovery systems.
Make sure you state your instructions in advance and get it in writing - we
ended up losing about half of the helium in the energising process because of this.
Geoff
> From: main_at_ammrl.groups.io <main_at_ammrl.groups.io> On Behalf Of Amber YaelSylvia Balazs
> Sent: Monday, February 5, 2024 4:38 PM
> To: main_at_ammrl.groups.io
> Subject: [External] [AMMRL] "bag-less" helium-recovery
Dear AMMRL Community,
Regarding our AstraZeneca helium recovery setup in Gothenburg, we have a bagless
helium recycling system (QT) that has been operational and working well for
about 18 months.
We're reaching out to community members regarding experience, tips&tricks,
and advice about how much helium you believe we can realistically expect to
recover with the following upcoming scenario:
During this year we will decommission an old Oxford 500 MHz magnet. We will
replace it with a new magnet.
Naturally, we would like to recover as much helium as possible during the
decommissioning and commissioning process, but without risking our existing
systems, nor making the process too arduous for the visiting magnet engineer.
Thank you in advance for your thoughts and any follow-up questions,
Richard Lewis
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Received on Mon Feb 05 2024 - 09:26:39 MST