A UK company of E.ON and RWE

Nuclear New Build at Oldbury

Chris Pearce – Lead Mechanical Engineer (CI)

Severn Estuary Forum

23rd September 2011

A UK company of E.ON and RWE

Agenda

• Horizon Nuclear Power

• Development plans for Oldbury

• Interactions with the Estuary

• Questions

A UK company of E.ON and RWE

Horizon Nuclear Power

• Safety First culture

• Formed in January 2009 – a 50:50 joint venture between E.ON UK

and RWE npower

• Head office in the Gloucester Business Park

• Partnership of two experienced nuclear operators

• Mission to develop around 6,000MW of new nuclear capacity by

2025. At least £15bn investment.

A UK company of E.ON and RWE

Wylfa

Gloucester

Oldbury

Site Locations

A UK company of E.ON and RWE

Main activities:

• Environmental studies

• Site Development

‒ Cooling Tower BAT

‒ Thermal Plume Modelling

‒ Transport / MOLF studies

‒ Flood Risk Modelling

• Working arrangements (PPA, SWoG)

• Community engagement

Programme: phased site development (Wylfa then Oldbury)

• Resources (people, funds, regulatory effort)

• Lessons learned and optimised overall schedule

Development at Oldbury

A UK company of E.ON and RWE

Oldbury – Site Location

A UK company of E.ON and RWE

OldburyIndicative Layout

• Based on twin Areva EPR

reactors

• CT BAT assessment

– Reduce visual impact by

clustering towers

– Shield residences from

CT noise

– Indicative settling system

solution

• Very illustrative!

A UK company of E.ON and RWE

• “Indirect” cooling requirement – Cooling Towers

• “Make-up” from existing tidal reservoir

• “Purge” to main river channel

• Sediment settling system

• Number of cooling towers (3 or 4)

• Cooling Tower Options Study

– Visual Impact

– Capital cost & efficiency/running cost

– Maintenance costs

– Reliability/availability

– Noise

– Sustainability

Oldbury – Cooling System

A UK company of E.ON and RWE

A UK company of E.ON and RWE

A UK company of E.ON and RWE

• Royal Haskoning

• TUFLOW

• Overtopping – direct and waves

• Breaching

• Three return periods (AEPs)• 1 in 200 yr (0.5% AEP)

• 1 in 1,000 yr (0.1% AEP)

• 1 in 10,000 yr (0.01% AEP)

• Climate change impacts• Sea level rise - Defra/PPS25 rates for

SW region vs. UKCP09

• Wave height increases – Defra PPS25

• Storm surges

• Tsunami must be considered but likely

bounded by tidal / storm events

Flood Risk Modelling

A UK company of E.ON and RWE

Questions?