Transcript DSS - Indico

DSS
 Informal review Tuesday 24th October 10:00 Room 2 1-034,
organized by Laurent Roy.
 Subsystems will not be allowed to run overnight or at
weekends if DSS is not installed and running.
 We must present our thoughts on
 equipment needed
 alarms
 actions
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- Probe for water leak detection (Mixed Water) on the bottom of the HCAL and
ECAL Racks :
How many, fixation, cables used, where chaining is done, when they will be ordered
and installed, tests...
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- Thermo switch for PS and SPD :
How many, types, switching temperature value, position, cables used, where
chaining is done, when they will be ordered and installed, how to test them...
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- Link between DSS and the demineralized Water PLC (cooling for PS/SPD):
Are there two circuits side A and side C?, PLC location, connection types to the
PLC.
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- Other equipement safety points without links foreseen today with DSS:
100V,30V,18V Voltage shut down, 'Switch off' function directly on the HV ?
"monitoring source"-->interlock, parking position when electrical power cutting ?...
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- When will DSS need to be fully operational for Calorimeter ?
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Then, the Alarm-Action Matrix could also be discussed during that
meeting.
The Calorimeter can be divided in two parts (DSS point of view), my proposition for each side is the
following:
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* One PS/SPD Thermo switch open -->
Alarm: Temperature too high in PS or SPD 'boxes' side x --> Action: shut down electrical power for
Calorimeter side x (x = A or C).
* No Flow (mixed water) during 10 seconds OR water Temperature too high OR water Temperature
too low --> Alarm: Mixed water cooling not ok --> Action: shut down electrical power for
Calorimeter side x AND? close valve of the circuit side x.
* Detector fire detection (Sniffer system) in a calorimeter part side x --> Alarm: Fire detection in
Calo side x --> Action: shut down electrical power for Calorimeter side x.
* Rack fire detection (Smoke detector in Turbine)--> Action: shut down electrical power for
Calorimeter side x AND CO2 Gas injected in the rack concerned.
* Rack Thermo switch in Turbine open --> Alarm: Temperature too high in a rack side x --> Action:
shut down electrical power for Calorimeter side x.
* Water leak detection in a rack side x --> Alarm: water leak in a rack side x --> Action: shut down
electrical power and close valve of the circuit side x.
* Water leak detection in a PS or SPD 'boxes' side x --> Alarm: water leak in a PS/SPD boxes side x-> Action: shut down electrical power for Calorimeter side x AND open a contact ('stop the
cooling')links to the demineralized water PLC.
* Contact open from the demineralized water PLC --> Alarm: demineralized water not ok --> Action:
shut down electrical power for Calorimeter side A and/or C ?
(The D3 and B1 Calo racks follow a common Counting House racks Action-Matrix)
DSS documentation (in french): https://edms.cern.ch/file/580080/2/DSS_LHCB_version2.3.pdf
https://edms.cern.ch/580080/DSS_LHCB/version2.3.pdf