[Dsg-htcc] Power Outage

Marc McMullen mcmullen at jlab.org
Mon May 14 11:30:57 EDT 2018

Hi Krister,

You may know better than I, but page 3 of the outage document says 
Outage IV: Sub stations T-6 to T-12. Hall B Utility Power will be 
offline on 5/23 at 5pm. The only thing I see listed in Hall B for 5/22 
is End Station Refrigeration.

Please verify so that we can be prepared.


On 5/14/2018 11:20 AM, Krister Bruhwel wrote:
> Hello,
> Power outages are 17th and 22nd 5pm to 3am.
> Thanks,
> Krister
> On Mon, May 14, 2018 at 11:17:35AM -0400, Marc McMullen wrote:
>> Hi Yuri,
>> As you may be aware, on May 23 at 5pm the utility power will be turned off
>> in Hall B, for 8 hours. DSG will be switching the Space Frame cRIO to clean
>> power during the outage, so that the gas controls will not be interrupted.
>> Krister is handling the Hall B engineering on-call during this period. We do
>> not anticipate any issues with gas control, however, Krister needs a contact
>> person from the HTCC group so that he can be advised on any unforeseen
>> issues that may arise from the outage.
>> Can you have someone contact Krister so these details can be worked out.
>> Additionally, if you have concerns about the outage (as far as gas supply is
>> concerned), you may want to talk to Denny about having a rotameter installed
>> in the place of the mass flow controller, or at least bypassing it. Again,
>> we do not believe there will be any issues with the system during this time.
>> But if you have questions and concerns, now is the time to bring them up to
>> the Hall B Engineering/Mechanical group.
>> Thanks,
>> -- 
>> Marc McMullen
>> Detector Support Group
>> 757-269-7738

Marc McMullen
Detector Support Group

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