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DSS

DSS. Informal review Tuesday 24 th 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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DSS

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  1. 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

  2. - 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... • - 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... •  - 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. • - 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 ?...  • - When will DSS need to be fully operational for Calorimeter ?

  3. 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: • * 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

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