1. Major Changes
in Configuration since the Lehman Review in May 1999
Cut and cover construction technique has been employed where permitted by topography and
geology.
Tunnel lengths have been shortened to conform to the new lattice and topology. The
number of main linac sectors has been reduced from 92 to 44. The length of one sector has
been increased from 225.2 to 450.5 meters. Beam delivery has been significantly shortened.
Intervals between access shafts have increased, reducing the number of shafts required.
The number of utility shafts has also been reduced.
Sleeves have been created in the tunnel walls to house electronics (TEE's). These
sleeves will be cooled by LCW.
A centralized cooling plant has been adopted, replacing the distributed cooling system.
Active cooling systems to control tunnel air temperature have been adopted in the
damping rings only (Only beam delivery had active air cooling in the Lehman Review
configuration.)
The temperature for the LCW cooling systems for the injectors, main linac, and beam
delivery has been lowered to 82ºF from 113ºF. The DLDS RF distribution system will
be water cooled using LCW water at 82ºF.
Electro-magnet LCW cooling requirements have been substantially reduced by the use of
permanent magnets.
For the non-RF sectors of the main linac, the LCW cooling system has been reduced in
capacity to meet only the Phase I cooling requirements
Some power supplies will be air-cooled. (At the time of the Lehman Review, all power
supplies were water-cooled.)
Main linac cooling substations have been doubled in capacity from 2.5/3.2 OA/FA to 5 MVA
OA and the number of substations has been reduced from 92 to 22.
Main linac modulator substations have been doubled in capacity from 2.5/3.2 OA/FA to 5
MVA OA and the number of substations has been reduced from 46 to 22.
The secondary voltage in the main linac modulator substation has been changed from
480/277 volts, 3 phase, 60 hertz to 1300/750 volts, 3 phase, 60 hertz, with grounding
disconnects and current limiting fault protection.
Nine 2200 volt, solid state DC converter-controllers have been added to each main linac
modulator substation.
For the non-RF sectors of the main linac, the modulator portion of the equipment will
not be installed for Phase I. The substation pad and enclosure will be sized to
accommodate the addition of this equipment during the upgrade to 1 TeV.
 |
2. Current Configuration of the NLC Conventional Facilities
- Sources & Boosters: 3096 Total LF (Cut & Cover:100
%; Shallow Bored: 0 %)
- Tunnel floor width (ID): 14 FT single wide beam housing, 14
Ft single wide klystron gallery, 12 Ft Ceilings
- Access ramps: ten total, 12% grade, 10 FT wide
- Five diagonal utility shafts with precast manholes, 8 FT in
diameter in C&C backfill
- Cooling System: Two mechanical pads adjacent to C&C cut,
supplied with chilled water from central cooling plant. Each pad provides chilled water
(for rack cooling and for HVAC systems in klystron galleries and support buildings) and
LCW (for cooling structures, waveguides, TEE's, electro-magnets, and for cooling klystrons
& modulators). Chilled water system total capacity is 1815 tons and LCW cooling system
total capacity is 3500 GPM of LCW for installed cooling capacity of 4970 kW. Each pad also
provides 100 CFM of compressed air at 90 PSI for operating vacuum valves and other
equipment.
- Electrical System: demand 23.2 MW; ten unit substations,
34.5 - 0.48 kV
- Three Support Buildings: 10848 SF in total
- Damping Rings: 4749 Total LF (Cut & Cover:100 %; Shallow
Bored: 0 %)
- Tunnel floor width (ID): 14 FT single wide beam housing, 12
Ft Ceilings
- Access ramps: Six total, 12% grade, 10 FT wide
- Eight diagonal utility shafts with precast manholes, 10 FT
in diameter in C&C backfill
- Cooling System: Three mechanical pads, one for each ring,
supplied with chilled water from central cooling plant. Each pad provides chilled water
(for active tunnel air cooling, for rack cooling and for HVAC systems in support
buildings) and LCW (for electro-magnets, vacuum and RF loads, and for cooling klystrons
and modulators). Four dedicated LCW systems provide cooling for the damping ring
klystrons, electro-magnets, RF loads and dumps. Chilled water system total capacity is
6054 tons and LCW cooling system total capacity is 7092 GPM of LCW for a heat load of
18,700 KW. Each pad also provides 100 CFM of compressed air at 90 PSI for operating vacuum
valves and other equipment.
- Electrical System: demand 23.2 MW; ten unit substations,
34.5 - 0.48 kV
- Six Support Buildings: 12200 SF in total
- Pre-Linacs: 4461 Total LF (Cut & Cover:100 %; Shallow
Bored: 0 %)
- Tunnel floor width (ID): 14 FT single wide beam housing, 14
Ft single wide klystron gallery, 12 Ft Ceilings
- Access ramps: Six total, 12% grade, 10 FT wide
- Twelve diagonal utility shafts with precast manholes, 8 FT
in diameter in C&C backfill
- Cooling System: Four mechanical pads supplied with chilled
water from central cooling plant. Each pad provides chilled water (for rack cooling and
for HVAC systems in klystron galleries and support buildings) and LCW (for
electro-magnets, collimators, TEE's, vacuum and RF loads, and for cooling klystrons and
modulators). Chilled water system total capacity is 3,865 tons and LCW cooling system
total capacity is 8,480 GPM for a heat load of 12,182 KW. Each pad also supplies 100 CFM
of compressed air at 90 PSI for operating vacuum valves and other equipment.
- Electrical System: demand 25.9 MW; twelve unit substations,
34.5 - 0.48 kV
- Eight support Buildings: 13600 SF in total
|
- Main Linac: 67301 Total LF (Cut & Cover:100 %; Shallow
Bored: 0 %)
- Tunnel floor width (ID): 14 FT single wide beam housing, 14
Ft single wide klystron gallery, 12 Ft Ceilings
- Access ramps: fifty-four total, 12% grade, 10 FT wide
- Forty-four diagonal utility shafts with precast manholes, 8
FT in diameter in C&C backfill
- Cooling Systems: Forty-four mechanical pads, one for each
linac sector, supplied with chilled water from central cooling plant. For the RF sectors,
each pad provides chilled water (for rack cooling; and for klystron gallery HVAC systems)
and LCW (for structures, electro-magnets, DLDS RF distribution, tunnel TEE's and for
cooling klystrons & modulators). For the non-RF sectors, each pad provides chilled
water for rack cooling, klystron gallery HVAC and tunnel TEE's. The mechanical pads for
the final sector in each linac also provide LCW for the 13 MW beam dumps at the ends of
the main linacs. Chilled water system total capacity is 56,952 GPM for a total heat load
of approximately 48,460 tons and the LCW cooling system total capacity is approximately
145,194 GPM for a installed cooling capacity of 164,316 KW at 500 GeV.
- Electrical System: demand 148 MW
- RF Sectors: Twenty-two unit substation pairs (one 34.5 -
0.48 kV transformer for motors, I&C racks and power supply racks; and one 34.5 - 1.3
kV transformer & rectifier to supply 2.2 kV dc for modulators)
- Non-RF Sectors: Twenty-two single unit substations (34.5 -
0.48 kV transformer for motors, I&C racks and power supply racks)
- Forty-four Klystron Galleries: 5051 SF each; 222,244 SF in
total.
|
- Beam Delivery: 27,400 Total LF (Cut & Cover:100 %;
Shallow Bored: 0 %)
- (IRT1 includes all facilities and supporting services. For
IRT2, only the basic structure is provided. Electrical/mechanical systems will be
installed when the second detector is built.)
- Tunnel floor width (ID): 14 FT single wide beam housing, 12
Ft Ceilings
- Access ramps: six total, 12% grade, 10 FT wide
- Ten diagonal utility shafts with precast manholes, 8 FT in
diameter in C&C backfill
- Cooling Systems: Four mechanical pads for IRT1 supplied with
chilled water from central cooling plant. Each pad provides chilled water (for HVAC
systems for the support buildings) and LCW (for electro-magnets, rack cooling, TEE's,
and, where applicable, for collimators and dumps). Chilled water system total
capacity is 16,607 tons and the LCW cooling system total capacity is 26,195 GPM for a
total heat load of 57,564 KW. Each pad also provides 200 CFM of compressed air at 90 PSI
for operating vacuum valves and other equipment. The IRT2 pads will provide just equipment
for ventilation, and drainage
- Electrical System: demand 1.6 MW; ten substations,
34.5 - 0.48 kV
- Twelve Support Buildings: 28,600 SF in total
- 2 IR complexes: 180,000 SF in total (For IR2, only the basic
structure is provided.)
- Access ramps: two total, 12% grade, 10 FT wide
- Two diagonal utility shafts with precast manholes, 12
- FT in diameter in C&C backfill
- Cooling systems: Two mechanical pads, one for IR-1, will supply chilled water from the
central cooling plant. The IR-1 pad will provide chilled water (for HVAC systems for
enclosed spaces) and LCW (for electro-magnets and technical system components and the two
final 13 MW beam dumps). The chilled water system total capacity is approximately 1,600
GPM for a heat load of 1,000 tons of refrigeration and the LCW cooling system total
capacity is approximately 1,000 GPM for a total heat load of 2,000 KW. The IR-1 pad will
provide 200 CFM of compressed air at 90 PSI., as well as other equipment for ventilation,
and drainage. The IR-2 pad will provide just equipment for ventilation, and
drainage.
- Electrical System: demand 6.9 MW; three substations, 34.5 - 0.48 kV
- Land acquisition: 7900 acres
- Off-Site Support - None to Date
- Alignment Network: 1120 monuments
- Construction Support/Spoil Disposal: 2.4 MSF
- Site Preparation
- Clearing/Grading: 772 acres
- Drainage: 182,000 LF
- Fencing: 120,000 LF
- Irrigation: 118 acres
- Electrical System: 318 MW capacity
- Three main substations: 230-34.5 kV and three-way,
cross-tied ring bus distribution system
- Four full site 34.5 kV solidly grounded overhead
distribution lines w/sectionalizing
- Waste and Water Systems:
- On-site water treatment plant for peak population of 150
- 100,000 LF water distribution system
- On-site sewage treatment plant for peak population of 150
- 100,000 LF sanitary sewer lines
- Electrical System: five substations, 34.5 - 0.48 kV
- Communications Systems:
- PBX for 650 lines
- 220,000 LF telephone cable
- 110,000 LF SCADA cable
- Central Lab: 60,000 SF
- No auditorium
- Electrical System: two substations, 34.5 - 0.48 kV
- Heavy Works
- Two heavy assembly buildings: 40,000 SF
- Four light assembly buildings: 40,000 SF
- Electrical System: two substations, 34.5 - 0.48 kV
- Shops: three buildings: 27,000 SF
- Electrical System: two substations, 34.5 - 0.48 kV
- Warehouse:
- Two warehouse buildings: 40,000 SF
- Bottled gases building. 6,000 SF
- Electrical System: two substations, 34.5 0.48 kV
- Security/Emergency Services:
- Security services facility and outpost buildings 1,600 SF
- Emergency response center: 5,000 SF
- Medical facility 2,000 SF
- ES&H facility: 2,000.SF
- Electrical System: one substation, 34.5 - 0.48 kV
- Vehicle Service/Grounds Maintenance
- Three buildings: 13,000 SF total area
- Electrical System: one substation, 34.5 - 0.48 kV
- Centralized Cooling Plant: 40,000 SF
- Provides chilled water for cooling systems in beam-line
housings; chilled and hot water for campus HVAC systems; and LCW and compressed air for
the laboratory area.
- Electrical system: four substations, 34.5 - 0.48 kV
- Control/Communications:
- Control Room: 10,000 SF
- Operations Center: 15,000 SF
- Communications 5,000 SF
- Electrical System: three substations, 34.5 - 0.48 kV
This page was created on 03/03/2000 and updated on April 22, 2002 by Nixx.
[Disclaimers, Copyright, and
Other Fine Print]
