Interfaces Interlocks – SIL 2 hardware interlock LASER connection – Alarms transmitted to LASER DIP: Data Interchange Protocol – Access to RAMSES (some) real time data Logging DB / Measurement DB – Access to RAMSES (some) historical data
RAMSES2 Light Securing the LHC injector chain Installation of ~50 measuring channels at the PS and SPS to partially replace ARCON All relevant installations for LHC operation now independent of ARCON Parallel operation to ARCON in 2011 Installation finished during short shutdown; acceptance tests ongoing Alarm transmission to CCC to be finalised
ARCON/RAMSES consoles CCC (PS) Dedicated ARCON Terminal, will be replaced by RAMSES console Alarm repeater panel ARCON connection status
Alarm repeater (PS) Acknowledge button Test button Alarm LED Operational status 1.Alarm is triggered: Sound + LED 2.Acknowledgement: If alarm still present, LED remains, sound is stopped but repeated after 5 min 3.LED disappears when alarms is acknowledged and off.
ARCON connection panel (PS) 1.If connection to ARCON is lost: Sound + LED 2.Acknowledgement 3.Upper panel shows which ARCON has been lost 4.LED disappears when connection is re-established
DA Meas. Electronics Alarm creation Detector Alarm Unit Interlock DA Interlock DA Interlock ARCON EST Alarm Repeater (CCC, CTF3 CR) Interlock on safety chain: PAXCT211 PATCT201 For all other detectors at CTF3 RAMSES (CTF3) RAMSES Alarm transmission
DA Meas. Electronics Alarm creation Detector Alarm Unit Interlock DA Interlock DA Interlock PLC Alarm Repeater PLC Safety Chain RAMSES Server RAMSES2 light (PS) RAMSES Alarm transmission
ARCON Interlocks Signal from ARCON output (same as displays or repeater) North Area, SM18, ISOLDE ARCON interlock = 56 monitors Redundant measure Fail safe rate meter creates interlock Independent of ARCON operation Linac 2 RATEMETER interlock = 1 monitor Interlock created by LASER system ECA4/CNGS, TI2, TI8, ECA5 LASER interlock = 10 monitors
System failures Typical failures: Network interruption, power failures Alarm remains on although alarm conditions are off Monitors stops working (BF alarm) Monitors show abnormal high values Software crashes (no alarms created, no alarms transmitted, no measurements stored or transmitted, “stable values”, no communication possible) Always contact DGS/RP (piquet or technician) in case of failures or doubts. Think failsafe !
Actions summary ARCON: A Level - RAMSES: “Alarm” (red) 1. Ascertain the cause of the alarm. 2.Take action to reduce the radiation levels. 3.If the radiation level cannot be reduced, contact DGS/RP. ARCON: B Level - RAMSES: “High Alarm” (red) 1. Stop the beam to the corresponding area. 2.Ascertain the cause of the alarm. 3.Take action to avoid further high radiation levels. 4.Note the alarm, its cause and actions taken in the logbook. 5.If the high radiation level persists, contact DGS/RP. Monitors or system fault 1. Identify the failure location and stop the beam to the corresponding area. 2.Contact DGS/RP, in order to put the system/monitor back into service. 3.The beam can be restarted once the fault has been eliminated or compensated.
General Procedure SR16: What to do in case of a radiation alarm ?
Specific: PS Complex Up to date information on interlocks available on: http://cern.ch/rp-ps 123456789 NameSurveyed installation Action in case of monitor failure Alarm Zone A AlarmB Alarm Alarm transm. Mon. fault Class ARCON SUD (PCZP21) PAXS11PS ejection, Linac 2 ejectionStop PS FT16 ejectionSUD50100BYesZCS PAXS12Linac 3, RF cavitiesStop Linac 3 operation-1020-Yes ZCS perm PAXS14PS ejection, Linac 3 sourceStop PS operationSUD1020BYes ZCS perm PAXS21Linac 2, measurement lineStop Linac 2 operationSUD1020BYes ZCS perm PAXS22 Linac 2, D.22, towards Linac 4 worksite Stop Linac 2 operationSUD612BYes ZSL / ZNR The monitor provides a rate meter interlock to the Linac 2 beam: Interlock activation at 12 Sv/h averaged over 1500 sec (25 min) Ratemeter settings: bf: 10 nSv/h a: 6 µSv/h, b: 2 mSv/h, Time: 15 sec x 100, K: 7.25 nSv/ct PAXS23Linac 2, close to proton source, D.21Stop Linac 2 operationSUD1020BYesZCS perm
Specific: SPS Complex Document specifying detailed action to be taken in case of system failures (EDMS 969891)
Panel PC Data storage Local display PLC Real-time data DA Meas. Electronics Alarm creation Server CWS Server CMSS Historical data Real-time data DB DAI Detector DA MS Server ‘Applications’ SUPERVISION Alarm Unit Interlock ARCON BRIDGE Data flow
USER APPLICATIONS Supervision (SUP) Data Analysis Interface (DAI)
Applications Dedicated terminals in CR – Automatic NICE login RAMSES Terminal Server – Personal NICE login Supervision software login – Control rooms: generic login (spsop, psop, lhcop, …) – Other: personal login
Authorisation levels 1.Visualisation display of alarms, status, historical and real time data 2.Visualisation + Acknowledgment + acknowledge alarms and events 3.Parameter + Configuration + parameter and configure channels 4.Definition + system modifications / installations 5.Developer + programming / developing rights Operators RP / ENV
Event log User login/logoff Navigation in view history User parameter Documentation & Channel search Login information Present alarms / Alarm filter Displayed view Grouped mode change commands System functions DAI – Graph & Events viewer Return to top view Return to home view
RAWMINHOUR ARCON Availabilitylast 4 daysPermanent DR / SMP (discrete integration) Hourly values (ARCON) Hourly average values from MIN data (RDB) MDR / AVG (moving average) 15-sec-values averaged over 100 sec (ARCON) Not availableNot available (equal zero) RAMSES Availabilitylast 14 days, except alarm periods Permanent DR / SMP / RA (discrete integration) Measurement time (1.2sec, 12sec, 10 min) Values averaged over ~one minute from RAW data (MS) Hourly average values from MIN data (RDB) MDR / AVG (moving average) Alarm sampling time (60 sec) One value sampled per minute from RAW data (MS) One value sampled from MIN data (RDB) Available measurement data
Channel parameters (example RP channels) Monitoring Station status information Measured values: Dose rate + mean dose rate Parameters Status Operation mode Alarm unit status RAMSES
Channel parameters Monitoring Station (ARCON) status information Real time values: Mean dose rate Parameters Alarm configuration and status information Channel status ARCON
Maintenance Preventive maintenance done by contractor Interventions/urgent repair 1.“First line”: DGS/RP piquet (24h/24h,7d/7d) 2.DGS/RP/IL technical support during working hours 3.Contractor: 8 – 48 hours to solve problem on site
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