The approach to radiation safety for the olympic dam expansion green

This document is confidential to BHP Billiton Olympic Dam Corporation Pty Ltd

or its related bodies. It must not be made available to or used by any other person.

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Olympic Dam ExpansionRadiation Management

Steve Green Sustainability Manager19 October 2010


or its related bodies. It must not be made available to or used by any other person.Olympic Dam Projects / Sustainability Slide 2

Disclaimer

Reliance on third party informationThe views expressed here contain information that have been derived from publicly available sources that have not been independently verified. No representation or warranty is made as to the accuracy, completeness or reliability of the information. This presentation should not be relied upon as a recommendation or forecast by BHP Billiton.

Forward looking statementsThis presentation includes forward-looking statements within the meaning of the U.S. Securities Litigation Reform Act of 1995 regarding future events and the future financial performance of BHP Billiton. These forward- looking statements are not guarantees or predictions of future performance, and involve known and unknown risks, uncertainties and other factors, many of which are beyond our control, and which may cause actual results to differ materially from those expressed in the statements contained in this presentation. For more detail on those risks, you should refer to the sections of our annual report on Form 20-F for the year ended 30 June 2007 entitled “Risk factors” , “Forward looking statements” and “Operating and financial review and prospects” filed with the U.S. Securities and Exchange Commission.

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Non-GAAP financial informationBHP Billiton results are reported under International Financial Reporting Standards (IFRS). References to Underlying EBIT and EBITDA exclude net finance costs and taxation for jointly controlled entities, and exceptional items. A reconciliation to statutory EBIT is contained within the profit announcement, available at our website www.bhpbilliton.com.



Olympic Dam today

Discovered in 1975

Fully integrated processing facility from ore to concentrate to metal

Workforce of 3,000, majority residential in Roxby Downs

Poly-metallic orebody with ~9Bt resource

Current nameplate annual capacity of:

• 235,000t copper

• 4,500t uranium

• 100,000oz gold

• 800,000oz silver

In FY 2008 contributed 2.5% to Gross State Product

$500m per year invested in SA economy in goods and services


or its related bodies. It must not be made available to or used by any other person.Slide 4

A world class resource

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Million tonnes CopperThousand tonnes U3 O8~1100Million oz Gold

Sources: Company Annual Reports, press releases and International Atomic Energy Agency (as at September 2008).Witwatersrand figure is BHPB estimate and is approximate only

Note: # Based on reported resource “inventory” at 0.2% Cu cut-off grade

Largest uranium resource in the world

4th largest copper resource in the world

4th largest gold resource in the world



Primary drivers for expansion

9.1 billion people by 2050

Copper - 35 Olympic Dam sized operations by 2016



Uranium demand and supply

Uranium - 13 Olympic Dam sized operations by 2030

748 nuclear reactors by 2030



Expansion components

From Australia’s largest underground to an open pit mine at 72Mtpa ore production

Ore processing plant ~ 7 times capacity of existing

Waste heat power station ~250MW

Electricity transmission line ~ 270km

Option for a gas pipeline from Moomba to Olympic Dam and on-site power station

~100km rail line, Olympic Dam to Pimba

200ML/d seawater desalination plant and a 320km pipeline



Expansion – key figures



Scale of proposed open pit



Chuquicamata pit - Chile















Environmental Impact Statement (EIS)

Developed by 300 scientists, engineers and other professionals from 75 companies, >150,000 hours work

Executive Summary, information sheets, DVDs with full documentation, webpage, films and animations

Three Ministers are being requested for a decision

• Australian Minister for Environment (Tony Burke)

• SA Minister for Mineral Resources Development (Paul Holloway)

• NT Minister for Infrastructure and Transport (Delia Lawrie)


or its related bodies. It must not be made available to or used by any other person.Olympic Dam Projects / Sustainability Slide 16Olympic Dam Projects / Sustainability Slide 16

Olympic Dam EIS radiation expertise

Expert Company RoleTim Harrington KBR EIS Advisory Team

Jim Hondros Private EIS Advisory Team

Dr Anthony Wrixon Private Expert Peer ReviewerKeith Lokan Private Expert Peer Reviewer

Dr Phillip Crouch Private Radiation management

Sharon Paulka Private Radiation management

Andrew Leaske Private Nuclear Fuel Cycle

Phillip Bryant BHP Billiton Advisory/Review

Frank Harris BHP Billiton Advisory/Review

Dr Cameron Lawrence BHP Billiton Advisory/Review

Kathryn Taylor BHP Billiton Advisory/Review



Government reviewers of EIS

South Australian1. Department of the Premier & Cabinet2. Department of Treasury & Finance3. Department for Environment & Heritage4. Department of Planning and Local Government5. Department for Transport, Energy & Infrastructure6. Department of Further Education, Employment, Science &

Technology7. Department of Health8. Department of Education and Children’s Services9. Department of Water, Land and Biodiversity Conservation10. Department for Families & Communities11. Department of Primary Industries & Resources of South Australia 12. Department of Trade & Economic Development13. Department of Justice14. Auditor-General’s Department – Crown Solicitor’s Office & Native

Title Unit15. Environment Protection Authority16. Safework SA17. Zero Waste SA18. Aboriginal Affairs & Reconciliation Division19. SA Police

Australian1. Department of Environment, Water, Heritage and the Arts 2. Department of Defence 3. Department of Families, Housing, Community Services and

Indigenous Affairs4. Department of Foreign Affairs5. Department of Infrastructure, Transport, Regional Development and

Local Government6. Department of Innovation, Industry, Science and Research 7. Department of the Prime Minister and Cabinet 8. Department of Resources, Energy and Tourism9. Geoscience Australia10. Australian Radiation Protection and Nuclear Safety Agency11. Australian Safeguards and Non-Proliferation Office12. Office of the Supervising Scientist

Northern Territory1. Department of the Chief Minister2. Department of Planning & Infrastructure3. Department of Natural Resources, Environment, The Arts & Sport 4. Department of Minerals & Energy5. Department of Health & Families6. Darwin Ports Corporation7. Land Development Corporation



EIS approach to radiation safety

Comply with the ICRP and other legal requirements

Current operation• Compliance with licence conditions and ICRP requirements• Operational ALARA (Justification, Optimisation, Limitation)

Expansion• Build on existing radiation practices• Dose assessment for expanded facilities• Optimisation in design through;

• Training and awareness of design engineers• Radiation risk workshops• Radiation safety in design• Design criteria

• ERICA assessment for non-human biota• Tier 1 & 2• Negligible impact

• Consideration of new ICRP recommendations



Radiation doses



Member of the Public RnDP Dose

Location Radon Conc. (Bq/m3)

Estimated Member of the Public Dose(mSv/year)

Limit = 1mSv/year

Indoor Outdoor Total

Roxby Downs 3.4 0.085 0.032 0.117

ODV 30 0.377 0.141 0.519

Hiltaba Village 3.3 0.041 0.015 0.056



Public exhibition

Draft EIS public exhibition

Media launch 1 May, 2009

May to 7 August (3 ½ months)

Booth style, experts present

Public meetings, attendees

Roxby Downs (25 May), 150

Port Augusta (27 May), 140

Whyalla (29 May), 130

Adelaide (2 June), 270

Darwin (3 June), 25

Alice Springs (4 June), 35

Total of 750 attendees



SEIS progress update

4,197 submissions received, 391 unique

A total of 2600 questions require a response via the Supplementary EIS

Additional studies undertaken for the Supplementary EIS

32 chapters, +1000 pages, +4000 pages of appendices

Supplementary EIS submission to Governments by year end



• Temperature profiling in pit (CSIRO)

• Recent analysis of radionuclides in soil and flora

• Review of radionuclides in seepage from TSF and RSF

• Consideration of Ac227

• Radionuclides in pit lake, post closure

• Further justification for radon emanation rates (TSF and pit)

• Preliminary baseline study of Port of Darwin and Adelaide

• Reassessment of MoP doses including flora, fauna and water

pathways

SEIS radiation studies



Summary

Radiation management has been a fundamental design consideration for the Expansion

The EIS approach has been based on ALARA, underpinned by ICRP

Predicted radiation doses will be low and well controlled

The Supplementary EIS will be finalised this year

