access and alarm safety systems · 2011. 11. 23. · access and alarm safety systems - activities...

Access and Alarm Safety Systems -Activities for the 2012/2013 Long Shutdown

By S. Grau, in collaboration with R. Nunes and T. LadzinskiIn the name of the Access and Alarm Team

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LHC Performance WS Chamonix 2011

Table of contents

Activities of maintenance, consolidation, upgrades and new installations on:

1. Alarm systems2. Access systems

Impact on LHC activities – injector chain work

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MaintenanceAutomatic Fire Detection Systems

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• Planning▫ 1/year, compulsory (IS37)▫ OK 9 weeks of Xmas Break for

underground installations▫ Quarterly maintenance: minimize

spurious alarms• Constraints

▫ Surface installations: Run & T. Stop• Potential Risks (if not done)

▫ Increase of latent faults => reduce safety and availability (spurious alarms)

• Impact if shutdown moves to 2013▫ Annual maintenance- Xmas Break▫ Quarterly maintenance- T. Stops

• Preventive maintenance▫ Visual inspection▫ Functional and alarm test▫ Cleaning of air sampling

networks▫ Replacement of components

ConsolidationR2E relocation of fire detectors- Point 1/5/7

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• Remove smoke detectors from radiation critical areas▫ RR13/17▫ RR53/57▫ UJ56▫ RR73/77▫ UJ76

• Planning▫ Long Shutdown▫ 3-4 weeks/item

• Constraints▫ Dependency with EN/EL▫ 2-3 days of service interruption (no

detection)

• Potential Risks (if not done)▫ Increase of detected/latent faults▫ SEE destructive events (CNRAD

test)

• Impact if shutdown moves to 2013▫ Partially implemented

MaintenanceAutomatic Gas Detection Systems

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• Preventive maintenance▫ Oxygen deficiency +

Flammable gases▫ Visual inspection▫ Functional and alarm test▫ Calibration of detectors▫ Replacement of components

• Planning▫ 1/year, compulsory (IS37)▫ OK 9 weeks of Xmas Break for

underground installations▫ Quarterly: minimize spurious alarms

• Constraints▫ Surface installations: Run & T. Stop▫ Intersite doors open

• Potential Risks (if not done)▫ Increase of latent faults => reduce

safety and availability (spurious alarms)

• Impact if shutdown moves to 2013▫ Annual maintenance - Xmas Break▫ Quarterly maintenance - T. Stops

ConsolidationUnderground Gas centrals - Point 1 and 5

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• Improvement at Point 1▫ Split USA15 gas central in 2

racks Currently saturated

• Improvement at Point 5▫ Split USC55 gas central in 2

racks Separation of Machine

/Experiment detection Currently saturated

• Planning▫ Long Shutdown▫ Several weeks/central

• Constraints▫ Detection interruption (UX15,

USA15, USC55, UXC55)▫ Important compensatory measures

and procedures

• Potential Risks (if not done)▫ Impossibility to add new

sensors/contacts

• Impact if shutdown moves to 2013▫ Implementation delayed

MaintenanceEmergency Evacuation, Beam Imminent Warning

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• Preventive maintenance▫ Visual inspection▫ Functional and alarm test▫ Sirens test together with ODH flash test

▫ Replacement of components

• Planning▫ 1/year, compulsory (IS37)▫ OK 2 weeks of Xmas Holidays

• Constraints▫ During “Cold Gas He standby”▫ Intersite doors open▫ Nobody in the machine/experiments


safety and availability

• Impact if shutdown moves to 2013▫ Annual maintenance-Xmas Holidays

MaintenanceSNIFFER – fire and gas detection inside Experiments

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• Preventive maintenance▫ Visual inspection▫ Functional and alarm test▫ Cleaning of air sampling

networks▫ Replacement of components

• Planning▫ 1/year, compulsory (IS37,

IEC61508)▫ Minimum 10 weeks (Xmas Break, T.

Stops)• Constraints

▫ Detection interruption per module▫ Accessibility to US15 required


safety and availability (spurious alarms)

• Impact if shutdown moves to 2013▫ Annual maintenance - Xmas Break

and Technical Stops

• Preventive maintenance▫ Mechanical maintenance of

doors and access points▫ Acquisition chain tests (from

doors, power converters, dumps, etc... to PLC)

MaintenanceAccess –LASS/LACS

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• Planning▫ 1/year (stated in “Regles Générales

d’Explotation LHC”)▫ OK 9 weeks of Xmas Break▫ Limiting other activities▫ Very important before start of the LHC

• Constraints▫ Reduced availability of access point▫ Dependencies with equipment groups▫ DSO tests (2 day, before restart)


safety and availability• Impact if shutdown moves to 2013

▫ During Xmas Break

• Improvement of video system▫ Avoid image freezing▫ Improve fluidity of images Install encoders, review

archiving architecture (PAD)

• Improvement IT network▫ Increase PAD availability by

reducing dependency of network components

Consolidation - AccessVideo system and IT network

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• Planning▫ Long Shutdown▫ Several months

• Constraints▫ Reduced availability of access point▫ Video: migration all at the same time▫ Network: design phase in

collaboration with IT, work mainly by IT

• Potential Risks (if not done)▫ -


• Relocation of LACS racks▫ UJ56, UJ76

• Displacement of door▫ UJ561=YCPY01

Consolidation - AccessR2E effects on Access

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• Planning▫ Long Shutdown▫ Several weeks/site

• Constraints▫ Dependencies with EL and IT▫ 3 days testing/site (no access on

concerned octant)

• Potential Risks (if not done)▫ Increase of latent faults, reduce

safety and availability

• Impact if shutdown moves to 2013▫ Partial implementation

• Reliable acquisition of safety signals from “overpressure doors” and apply the necessary safety actions

New Installation - AccessInterlock of “overpressure doors”

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• Planning▫ Long Shutdown▫ Several weeks/site

• Constraints▫ Risk analysis and specification

required▫ Work with TE/MPE for reliable

Power Interlock Controller link • Potential Risks (if not done)

▫ Major He Release containment during magnets powering

▫ Ensure correct ventilation path for tunnel activated air

• Impact if shutdown moves to 2013▫ Implementation delay

• Allow for maintenance in external envelope during run periods (PM Shafts)▫ Additional temporary

physical barrier▫ Absence of constraints during

Technical Stops

New Installation - AccessAccess envelope modification

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• Planning▫ Long Shutdown▫ Several weeks/Top of Pit access

point

• Constraints▫ Technical solution to be defined▫ Possible impact on civil engineering

GS/SE

• Potential Risks (if not done)▫ Reduces availability of access system


New Installation - AccessNew access point in TZ32 and PZ65

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• TZ32 – CLIC alignment▫ New access zone

• PZ65 – when PM65 unavailable▫ New access point

• Planning▫ Long Shutdown▫ Several item

• Constraints▫ PZ65- to be approved▫ Possible impact on civil engineering ▫ Dependencies with EL, MME

(integration)

• Potential Risks (if not done)▫ Reduces availability of access system


PS work – impact on LHC activities

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• PS Primary Areas Access Renovation▫ New access control system

(doors, access points) ▫ New access safety system

(interlocks)▫ Deployment of a Beam

Imminent Warning and Evacuation system

• Resources▫ The same team as for the LHC

• Impact if shutdown moves to 2013▫ Positive impact: more time to

validate the new system and prepare the migration

Thank you for your attention

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access and alarm safety systems · 2011. 11. 23. · access and alarm safety systems - activities...

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