[Clas12_rich] RICH THA and OSP

[George Jacobs]

I have some comments;
RICH-THA
In your sequence of task steps 2, column Safety 
Procedures/Practices/Controls/Training
Bullet 1
FYI, the air cooling system does not monitor anything, it only supplies 
signals to the cRio analog inputs. The cRio and EPICS monitor all 
transducer output signals.
Bullet 2
FYI, the air cooling system does not monitor or shut anything down. The 
cRio monitors the cooling system parameters, air pressure, air flow, and 
compressor power. The cRio is programmed to turn off the HV and LV under 
certain conditions and prevent HV and LV operation if certain conditions 
are not met. Those conditions are the interlocks system parameters.
In your sequence of task steps 3, column Safety 
Procedures/Practices/Controls/Training
Bullet 2
FYI, the N2 purge system does not set off any alarms. The RICH N2 flow 
and internal H2O levels are monitored via cRio and EPICS. The EPICS 
Alarm Handler would be programmed to have an alarm condition if the flow 
or H2O concentration go out of the normal range.

Cheers,
George

On 6/8/2016 11:14 AM, Valery Kubarovsky wrote:
> Hi All,
> Please take a look to the attached documents: ESAD, THA and OSP.
> We need to write OSP because the highest risk code BEFORE mitigation is 3.
> It is the rule. The comments are very welcome.
> Regards,
> Valery
>
>
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-- 
George Jacobs
Jefferson Lab (TJNAF)
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