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1
ESS CONVENTIONAL FACILITIES MAIN MILESTONES OF
THE PRESENT STUDY PHASE PROGRAMME OF WORK AND
ORGANISATION MAIN TECHNICAL OPTIONS MASTER PLAN
DRAWING
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SCOPE OF THE CONVENTIONAL FACILITIES
Site Reference site for programme, costs and
schedule Site characterization Site
preparation for construction (earthwork, roads, )
Buildings Front End / Linac tunnel / Klystron
buildings Ring buildings Targets and
instruments buildings Beam stop
buildings Central helium and RF test
buildings Central laboratory and office building
Infrastructures Water systems and associated
networks (potable water, cooling,
) HVAC Electricity Computer network
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CONVENTIONAL FACILITIES IMPACT ON THE ESS PROJECT
Conventional facilities can easily represent
about 30 of the total project budget and are
inevitably on the critical path of the project
time schedule
To control conventional facilities costs and
project schedule we have to
  - identify main possible technical options for
each conventional facilities subsystem
- associate to each of them a cost estimate as
precise as possible - adopt the most economical
(combining investment and operation) technical
options - analyse the impact on the planning of
construction
We use SNS, CONCERT and Vol III of ESS
programmes
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THE MAIN MILESTONES OF THE PRESENT PHASE OF STUDY
May 2002  Final proposal and presentation in
Bonn   January 2002  Document on      technical
options with the evaluation of the
TAC,     timescale for the Conventional
Facilities, from the design to the start of
operation, with the evaluation of the
TAC,     cost estimates submitted to Council
for approval.   January 2002  Presentation to
the TAC of main technical options
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PROGRAMME OF WORK AND ORGANISATION
SNS AND CONCERT EXTRAPOLATIONS
ELABORATION OF TECHNICAL OPTIONS
SNS Interface design parameters
Schemas
RF calculations by SACLAY for ESS 10 MW
Files
ESS UTILITIES LOAD SUMMURY
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EXAMPLES OF DOCUMENTS
1) ESS LOAD SUMMURY 2) FILES 4) WBS 3) SHEDULE
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LINAC TUNNEL TECHNICAL OPTIONS
CONCERT option Linac tunnel is just buried and
covered by earth material (3 m at the beginning
to 7 m at the end) SNS option same thickness
of earth material all along the linac tunnel
Advantages Limitation of earth material quantity
Drawbacks Variation of compression along the
linac but we assume that quasi linear
settlement is not a problem
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
SNS type option Klystron building very close to
linac tunnel
Advantages - wave guides length is
limited - schedule possibility to
build linac tunnel and klystron
building independently and in parallel
Klystron building
Retaining wall
1.5 m
Wave
guide
8 m
7 m
5 m
5 m
Linac
Drawbacks - retaining wall results in
increase of cost in comparison with
CONCERT option
tunnel
Chase
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
CONCERT option light metallic structure for
the klystron building
Klystron building
Earth material
Metallic siding
8 m
7 m
11 m
9 m
Wave guide
Linac tunnel
3.5 m
5 m
Advantages - limitation of the klystron
building cost - schedule possibility to build
linac tunnel and klystron building independently
and in parallel
Drawbacks Length of the wave guides is very long
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SIZE OF THE RETAINING WALL FOR RADIOLOGICAL
PROTECTION
Retaining wall
1 W/m and 0.5 microSv/h
1,5 M
0,6 m
5m
Linac Tunnel
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
LOS ALAMOS type option linac tunnel buried
deeply, -8 m, and klystron building on top
Advantages - easy to connect and disconnect
klystrons and pipes from klystron
building to linac - need less surface
than in other options because no earth
material - constant earth compression of
the tunnel
Drawbacks - water table must be deeper than in
other options -
HEBT, ring, RTBT and may be Front End
building, buried deeply at the same
level than the linac, so may be more
expensive than in other options - schedule
impossible to build linac tunnel and
klystron building in parallel
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
 No buried construction  option linac tunnel
on the floor and at the same ground level as
klystron building
Advantages - water table less problematic - no
trench
Drawbacks -more earth covering to shield
linac tunnel but also HEBT, ring, RTBT -uneasy
connection of wave guides and pipes from
klystron to linac building
Considered as unattractive
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
Conclusion on the linac tunnel option
LOS ALAMOS and  NOT BURIED LINAC options are
not retained
CONCERT AND SNS OPTIONS Lower cost for klystron
building in case of CONCERT option but length of
wave guides longer than in SNS option so we need
to study in more details these two options in
order to have a better estimate of the cost
difference
Construction and cost will depend on the
characteristics of the underground.
Extra costs resulting from deviations from the
reference site to be added to the site premium
(additional contribution from the host country)
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LINAC TUNNEL TECHNICAL OPTIONS (contd)
Chases connecting linac tunnel to klystron
building
We propose the same chase concept as that of SNS
Klystron building
Klystron building
In these chases we find the following equipment
wave guides, chilled water pipes electrical
cables
Retaining wall
Retaining wall
1.5 m
Wave
guide
Wave
guide
8 m
8 m
5 m
5 m
Linac
Linac
tunnel
tunnel
Chase
Chase
These parts are fixed on a special support This
support is put into the chase
Inside a chase, wave guides are cooled down by
chilled water pipes
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KLYSTRON BUILDING TECHNICAL OPTIONS
Goal minimize costs and therefore area
Two constraints 1)The short distance between
couplers in the SC part (average 2 m)
- difficulty to put Klystrons side by side -
high chaze density
2) The large size of the power supplies 10 m x
8 m
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KLYSTRON BUILDING TECHNICAL OPTIONS (contd)
option - all equipment are in the klystron
building ( RF, power supplies, cooling
equipment, HVAC, electronics racks, diagnostics,
vacuum control, quadrupole power supplies, etc )

• klystrons are in a vertical position, side by side

-some mechanical equipment like HVAC, DI water
system and rf power supplies are in alcoves. This
results in a reduction of the building surface
-metallic structure with double skin siding
-utilization of air pads and fork lifts to move
klystrons and other loads instead of travelling
crane (to reduce the building height)
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POSITIONNING OF KLYSTRON BUILDING and CHL/RF
BUILDING
Klystron building Length 430 m / Height 6
m
Beam axis
30 m
30 m
40 m
35 m
35 m
Alcoves
25,5 m
18,5 m
Front End building
37 m
62 m
gt190 m
CHL/RF building
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ACCESS ALONG THE LINAC TUNNEL (contd)
1 truck access at the beginning of linac tunnel
by the front end building 1 truck access in the
HEBT tunnel 6 personnel access
80 m between each access
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PERSONNEL ACCESS
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10 MW High energy linac power distribution
? 0.68
20 kV
HVPS 4MVA
? 0.86
4
11 klystrons
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56
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HVAC

• Utilization of Air blast radiators to cool raw
  water
• - Choice of the water pressure and the cooling
  temperatures values and their variations for
  process equipment

• Local hvac or little plant for offices,
  laboratories, and test areas
• Air conditioning units distributed along tunnels
  to keep right temperature when the beam is on
• HVAC from FE an other parts to remove air in the
  tunnels before coming into (70 mn)

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HVAC (contd)
Temperature in the tunnels with beam To Be
Determined Temperature in the tunnels without
beam after 70mn of ventilation To Be Determined
Temperatures in the FE To Be Determined Tempera
tures in Klystron building To Be
Determined Temperature in the ring . and other
buildings To Be Determined
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BEAM DUMPS
Linac beam dump Passive or actif , depend on
the power on the beam dump ?
Injection beam dump power on the beam dump ?
Extraction beam dump Passive or actif , depend
on the power on the beam dump ?
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RING
The same than ESS
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TARGET SHORT PULSE
The same than SNS extrapolated to 5 MW
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TARGET LONG PULSE
The same than SHORT PULSE
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MASTER PLAN
Target Short Pulse
Guest House
Central Laboratories and offices
Access
Achromat
750 m
Target Long Pulse
CHL/RF
Klystron building
Central Utility Building
1300 m
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MASTER PLAN
Building implantation CLO close Target
buildings Advantages easy access for
users Guest house one module of 60 rooms at
the beginning of the operations, an other 60
rooms the third year and an other the seventh
year Avantages construction cost reduction
COMPONENT ASSEMBLY  Technical option   RFQ ,
DTL, SDTL, CCL and SL will be assemble in the
shop company, outside the site. These components
will be installed and tested inside the Front End
and Linac Tunnel.   Justification  To avoid
buildings on the site for assembling components
(cost reduction) and time reduction for the
schedule.