WP2 Superbeam Work Breakdown Structure

Version 2Chris Densham

(after Marco Zito version 1 )

Use other experience where possible, e.g.

• CNGS – operating(!)• T2K – operating - 4 MW target station already

built• LBNE – working towards CDR

e.g.T2K Secondary Beam Line

DV

TS

BD

Hadron Absorber (Beam Dump)•graphite core in helium vessel

Target station (TS) •Target & horns in helium vessel •Helium vessel and iron shields cooled by water Decay Volume (DV)

•94m long helium vessel cooled by water•6m thick concrete shield

‘280 m’ neutrinodetector

50 GeV PS ring

Primary beam lineFast extraction

Kamioka

Cost Drivers for T2K

• From T2K construction• Proton driver excluded (available ‘free’)• Cost driver for T2K = Utilities [buildings, power,

shielding?]• NB Cost Driver probably Civil Engineering for an

underground Target Station in rock

2nd Preliminary WBS for WP2

1. Proton driver: COST DRIVER. SPL based, in common with NF

2. Infrastructure and Services – COST DRIVER for secondary beamline

3. Beam splitter and transport system

4. Target Station and Collector

5. Decay pipe

6. Beam Dump

7. Near Detector: from WP5

8. Far Detector : COST DRIVER but excluded from this WP

1. Proton Driver

2. Infrastucture and Services (1)

1. Civil Engineering (secondary beamline Cost Driver (I))1. Site and engineering studies2. Underground features

1. Shafts2. Beam transport tunnel3. Target station hall4. Decay volume tunnel5. Beam Dump hall6. Near Detector hall

3. Surface Buildings (excluding offices, workshops, assembly, services etc. buildings, assumed pre-existing CERN infrastructure)

1. Shaft access 2. Target station3. Beam Dump4. Near Detector

4. Site development1. Roads2. Environmental3. Misc. site works

2. Infrastucture and Services (2)

2. Shielding (secondary beamline Cost Driver (II))1. Target station shielding: c. 2.2 m iron + 1 m concrete (from

T2K Target Station designed for 4 MW)

2. Beam Dump shielding

3. Hot cell shielding

4. Services plant shielding

3. ‘Conventional’ Services1. AC Power

2. Cooling water and air conditioning

3. Vacuum

4. Cranes

5. Misc. building services

3. Beam splitter and transport system

1. Accelerator and component design, R&D

2. Beam separator magnet, switchyards etc

3. Beam transport magnets

4. Power supplies

5. Beam diagnostics, instrumentation

6. Cabling

4. Target station concept (I) a la T2K

Inner iron shield(2.2 m thick)

Inner concrete shield (1 m thick)

Support structure= Helium vessel

Baffle Target and 1st horn2nd horn

3rd horn

Beam window

4. Target station concept (II):(faster to exchange target/horn systems but costly)

Services

Services

4. Target Station and Collector1. R&D (Beam window, target, horn + power supply)2. Target helium vessel 3. Shielded component supports (horizontal or vertical handling?)4. Beam window (based on T2K if possible)5. Baffles (x 4, based on T2K)6. Target and collector system

1. Targets (x 4)2. Horns (x 4)3. Target and horn handling systems4. Shielded disposal casks

7. Hot cells1. Manipulators 2. Shielding windows3. Services

8. Horn power supply + strip lines9. Other PSUs10. Active cooling systems for: target (helium or water), horn, baffle, beam

window11. Active ventilation systems for: hot cell, shielding, plant rooms12. Control Room, diagnostics, instrumentation13. Cabling, pipework including secondary containment

5. Decay Volume

1. Vessel construction and installation (4 m x 20-40 m)

2. Active cooling system (e.g. water (T2K), air (planned for LBNE))

T2K Decay Volume water cooling

6. Beam Dump (CNGS => T2K => SPL SB)

1. Core (graphite + iron)

2. External cooling modules

3. Active cooling water system

4. Provision for replacement? (Cost vs risk)

T2K Beam Dump

7. Near Detector: from WP58. Far Detector : excluded from this WP

Cost / Design Issues

• Cost risk• Build costs running costs?• Integrated yield integrated costs?

• Target Station Design choices depend on grasp of these issues

Cost Drivers: the good news?

Our ideas of the Cost Drivers are:1. Proton Driver (shared with NF) – SPL costs already

estimated by R. Garoby2. Civil Engineering: Tunnelling, buildings (NB strongly

site specific)3. Shielding: Steel and Concrete4. Far Detector (excluded from this WP)• Item 1 is already estimated• Items 2 and 3 are relatively easy to parameterise and

estimate based on CERN costing tool• Item 4 is excluded

Safety Issues

• Civil engineering and construction• Lifting / handling• Maintenance of active components• Fault scenarios – risk of radioactive emissions