[Dsg-htcc] Back Up Power for Hall B Gas Controls

[Amrit Yegneswaran]

thanks for the info marc.

in future if you know that something is not 100% "kosher", don't wait till someone points it out to you; in this case you could done what you did and sent this e-mail as soon as the hallb power test was done, several months ago.


perhaps, youri sharabian will discuss this matter this with hallb eng.

not dsg's problem anymore



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From: Dsg-htcc <dsg-htcc-bounces at jlab.org> on behalf of Marc Mcmullen <mcmullen at jlab.org>
Sent: Tuesday, December 11, 2018 3:29 PM
To: dsg-htcc at jlab.org; Morgan Cook IV; Denny Insley
Subject: [Dsg-htcc] Back Up Power for Hall B Gas Controls


Hi Denny,


Yesterday I disconnected the SFL3 Gas Controls from an extension cord and reconnected it to the local utility power outlet. The Gas Controls equipment is on a UPS however that is only meant to last long enough for on-call staff to get on site.


The HTCC is a critical system which would suffer during an outage of substantial time. In the past, I believe the gas supply has been switched over to bypass the MFC in the case of an outage. I am not sure if the bypass circuit is still in service. This is the most efficient method of mitigating the effects of a massive power outage. I strongly suggest running the HTCC purge using a Rotameter during the holidays.


Additionally, it might be a good idea to run an electrical circuit which is connected to generator back-up  to the gas controls on SFL3, FC deck 0, and maybe even the Gas Shed control room.


Regards,

Marc
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