Underground Lab Design

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• Underground Lab Design
• Surface Facility
• Infrastructure
• Schedule

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• Underground
• Space for 10-100 tonne class experiment(s)
• Space for several 1 tonne class experiments
• Prototyping space
• Clean machine shop
• Clean storage
• Surface
• Clean lab space
• Computing facilities
• Office/meeting room space

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• Phase I
• Large rectangular experimental hall and support
  spaces.
• Network of connected drifts for smaller scale
  experiments.
• Expansion of the personnel facilities for larger
  facility.
• Phase II
• Addition of a cylindrical cavity and support
  spaces designed specifically for cryogenic
  experiments.
• Will Require Additional Funding

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6800 Level
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20 Bar Pressure Bulkhead
Staging Area
Vent Pipe to Return Air Raise
Dirty Access
20 Bar Pressure Bulkhead
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• South Drift
• Recover the existing SNO Personnel Drift and
  Carwash.
• SNO Detector Cavern
• Future use of the SNO detector cavern beyond the
  end of the SNO experiment to be determined.

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• Large spaces located beyond the 5 zone of
  influence from mining.
• Cavities designed for a 4.1 seismic event.
• Peak Particle Velocity 400 mm/s (5 G
  acceleration).
• Exploratory drilling was done to determine the
  optimal location for the lab.

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• Excavation Design and Geotechnical Studies are
  complete.
• Excavation of Phase I should begin August 2004.
• Detailed layout design (civil, mechanical,
  electrical, ...) progressing.

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• Lessons Learned from Existing SNO Surface
  Facility
• Require clean lab space.
• Areas to prepare material for clean transport
  underground.
• Adequate computing facilities.
• Sufficient Dry (Change Room) facilities.
• Office space for on site and visiting staff and
  researchers.

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Change Rooms - 100 Male - 50 Female
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• Construction has begun.
• Occupancy in May 2005.

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• Cleanliness
• Power
• Emergency Power
• Heat Removal
• Communications
• Personnel Access
• Material Transportation

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• Existing SNO facility is class 2000
• Goal for new facility is to be as good or better.
• Air from labs will be locally recirculated
  through HEPA filters.
• Problem with H2S identified in existing lab.
• Will use NaOH impregnated charcoal filters on lab
  air intake.

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• Existing SNO Facility uses 340 kW
• New facility expected to use approximately 600
  700 kW in Phase I.
• 150 kW emergency power generator will be located
  near the Chiller.
• Increase to 1 MW should be possible without
  major effort.
• Limiting Factor is likely to be available cooling.

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Hot Waste Air
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• 100,000 CFM available from INCO.
• Air Cooled Chiller
• Chilled water loop to lab.
• Up to 300 ton (1 MW) capacity.

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• 300 Ton chiller capacity should be considered an
  upper limit.
• The existing chiller (120 Ton) is operated at
  80 capacity.
• Budgeting heat loads for experiments will be a
  key part of experimental design for SNOLAB.

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• Clean transport underground in Blue Boxes.
• Sealed on surface with pressure equalized by
  HEPA filters during descent to 6800 level.
• Dimensions 140x68x44.
• However, the Blue Boxes will be redesigned and
  the dimensions may change.

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• Personnel travel to and from the lab at fixed
  times.
• Number of personnel on a cage can be limited.
• Access may not be possible if there is seismic
  activity or hoist maintenance.

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• Maximize performance of Chiller.
• Removing equipment heat while on emergency power.
• Radon free air for low background Counting
  facility.
• LN2 plant UG (radon free nitrogen).
• Lifting devices in clean spaces (monorail vs
  bridge cranes,...).
• Quantify seismic activity at lab site.

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• Layout of internal lab spaces.
• Power requirements.
• Average loads
• Peak loads
• Emergency power
• Heat removal requirements.
• Material transport
• Construction, Operations
• Personnel Access

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• Power Outages
• Summer lightening season.
• Winter ice season.
• Accidental interruptions from INCO activities.
• Annual INCO 12 hour power outage (November 11)
• Maybe 2-3 12 hour outages per year and many
  blinks and short outages.
• Loss of communications
• Damage to fibre optics communications lines
  underground.
• Failure of network components.
• No access underground
• Cage unavailable
• Annual INCO shut down (several weeks, limited
  access)
• Seismic activity.

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• Redundant communications
• Minimize single point failures
• Maximize remote control of experiment
• Control and monitoring.
• Shut down, start up
• Where possible design systems to run without
  intervention from surface.
• Systems underground must be able to run
  independently of surface
• I.e. With operators underground.
• Systems should fail safe.
• E.g. In the event of communications failure
  systems should go to a safe state.
• Be aware of the seismic environment.

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• The new SNOLAB facilities will include
• 30,000 sq ft of new clean room space underground.
• 34,000 sq ft lab, office and meeting space on
  surface.
• Surface facility under construction.
• Excavation of new labs to start in August.
• First experimental space available early 2006.
• Main hall and labs available late 2006.

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