Manchester Proton Beam Therapy CentreChristie Hospital, Manchester

MEP Engineering

Electrical Requirements

PBT Equipment Loads:

Cyclotron - xxxkVA

Each Gantry - xxxkVA

ESS and Beam Line Magnets – xxxkVA(Supplied from Power Supply Rooms)

Building HVAC systems – xxxkVA

Total Electical Load – xxxkVA

Load Characteristics

Power Factor Load Stability

Cooling Requirements

Main Process Cooling Loads:

Cyclotron - xxxkW

Energy Selection System – xxxkW

Each Gantry Section – xxxkW

Each Main Beam Line Section – xxkW

Operation of the furthest gantry – xxxkW

Cooling Requirements

Main Process Cooling Loads:

Operation of the furthest gantry – xxxkW

Control Cabinets – xxxkW

Total Process Cooling – xxxkW

Air Conditioning Loads:

Total Air Conditioning Load – xxxkW

TOTAL COOLING LOAD : 1400kW

2.8MVA

Electrical Load

1.4MW

Cooling Load

4 Gantry PBT vs. 4 Bunker LINAC

Cooling Electrical Load

Energy Requirements

PBT LINAC

Footprint (m2)

Spatial Requirements

PBT LINAC

Volume (m3)

x10 x12 x4 x10

Design

Holistic and Sustainable Design:

Re-use of expelled heat from magnets

Turbo Core Chillers (Magnetic bearings)

Combined Heat and Power Unit (CHP)

MEP Service Routing - Challenges

Routing of services into radiation protected spaces:

- Planning restraints on building height – reduced maze

- 95% of services embedded within concrete - double bends and N+1 resilience to all

8kmembedded

manuf.

conduits

2kmembedded

MEP

conduits

1kmembedded

pipework

Manchester Proton Beam Therapy CentreChristie Hospital, Manchester

Structural Engineering

Structural Key Issues

• Vault Shielding Performance

• Concrete Design

• Pour Sequence

• Building Settlements

• Conduits & Co-ordination

Vault Shielding Performance

• Co-ordination with Monte Carlo Model• Geometry Alignment

• Embedded Ducts/Conduits

• Material Properties

• Key Material Issues• Minimum Dry Density

• Maximum crack widths

• Pour Joints

• Impact on Structural Design• 2,300 kg/m3 Minimum Dry Density

• 0.2mm maximum crack width

• Shield walls between 2m and 5m thick.

• Maze joints between pours

Concrete Design

• CIRIA 660 Design• Used for thick concrete sections

• Cracking-dominated reinforcement design

• Careful consideration of restraint conditions & construction sequence

• Getting the concrete mix right• Low water content

• Limestone aggregate

• High cement replacement

• Concrete mix options tested (Target Density)

• Full scale pre-construction pour test

• Tight specification on thermal conditions• Setting maximum concrete temperature

• Set maximum differential temperatures

• Provide ‘live’ logging of pour temperatures

Concrete Design

• Full Scale Pre-Construction Test

Pour Sequence

• Detailed Review of Pour Sequence• Co-ordinated with Concrete Sub-Contractor

• Direct impact on design – internal restraint

• Informed programme, shutter designs and logistics

Building Settlements

• Tight differential settlement criteria• ~10x more onerous than ‘normal’ building

• Pre-contract pile test

• Pile stiffness data used in final design

• Rotary Bored Piles

Conduits & Co-ordination

• Approx 11km of conduits and services embedded in concrete –MEP plus specific treatment equipment cabling

• Over 500 individual conduits

• 2 to 4 bends and spacing rules apply

• All modelled and coordinated in a 3d BIM environment, including coordination with our reinforcement

• Detailed input to final MC model

Conduits & Co-ordination

• 3d Co-ordination of Reinforcement and Conduits/Services

• Individual pour by pour drawings issued showing all details, setting out and embedded items

• Full time Resident Engineer

• Key Vault Statistics• ~16,000 m3 concrete

• ~2,500 concrete wagons

• ~100 pours – up to 650m3 each

• ~2,000 tonnes reinforcement

• ~40,000 tonnes concrete

Same weight as two HMS Invincibles!