[3dem] Leaking loading stations

[Mario Borgnia]

In all units we have used here in North Carolina (four so far), the white
plastic insert deforms as it cools down. This is probably due to
anisotropic shrinking and likely related to the shape and casting of the
plastic. Strains accumulate and the side cracks close to the bottom.
The failure of our units (two of them) was not due to abuse. We warm up the
units at room temperature and dry them in air between uses. The cracks
developed always as we began filling them with nitrogen. IMHO, the failure
is due to design flaws.

On Thu, Sep 6, 2018 at 11:59 AM Michael Braunfeld <braun at msg.ucsf.edu>
wrote:

> Hi All,
>
> Do other facilities have any issues with the loading stations for the
> Krios/Arctica? We just experienced our second failure in the last month.
> The LN2 is leaking out at a pretty rapid rate from cracks at the base of
> the stations. These are not being abused in any way (as far as I know),
> and the worst part is the price quote from Thermo.
>
>
> Thanks,
>
> Michael Braunfeld
>
> HHMI/UCSF
>
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