0
1
August, 2007
35th ARPS CONFERENCE
Adelaide, 19 October 2010
Keeping Radiation Management at
Beverley Uranium Mine at Bes...
About Beverley
2
Approx. 550 km north of
Adelaide
By company plane:
~1 hr from Parafield
~1/2 hr from Pt Augusta
Brief History of Beverley Mine
• 1969 Discovered
• 1982 First draft EIS
• Process not completed due to ‘3-mine policy’
• 1...
Natural Uranium in the Frome Basin
Aerial gamma
survey
•Used as an
exploration tool
•Measures mainly
surface radiation
•Sh...
Natural Uranium in the Frome Basin – Take 2
5
•Same data, but use
of ‘hot’ colours could
be incorrectly
interpreted as
sho...
How the Beverley ISR Mine Works
Mining Process:
1. Groundwater pumped to
surface
2. Small amount of acid and
oxidant added...
Extensions and Plans for Future Mining at and
near Beverley
• 2006-08 Mine Lease Extension
– Risk Assessment approach
– Up...
How the Beverley North Satellite Mine will Work
8
9
Work Areas
• The main operational
components of the mine site are
– Wellfields from where the
uranium is extracted
– Pro...
10
Employee Work Groups (for Dose Calculations)
• Production
– Plant and wellfield operators, maintenance staff,
laborator...
• Worker limit is 20 milliSieverts (mSv) per year averaged over 5 years and not
to exceed 50 mSv in any one year; public l...
12
Average Dose Received by Work Groups (2009)
0.00
0.25
0.50
0.75
1.00
Production Maintenance Geology&
Drilling
Projects ...
Quarterly Dose Trends – Total Effective Dose
0
1
2
3
4
5
31-Dec-00 31-Dec-01 31-Dec-02 31-Dec-03 31-Dec-04 31-Dec-05 31-De...
Quarterly LLAA Trends – General Area Dust
0.00
0.10
0.20
0.30
0.40
31-Dec-
00
31-Dec-
01
31-Dec-
02
31-Dec-
03
31-Dec-
04
...
Quarterly LLAA Trends – Drier and Packing Room
0.0
2.0
4.0
6.0
8.0
10.0
12.0
31-Dec-
00
31-Dec-
01
31-Dec-
02
31-Dec-
03
3...
Quarterly LLAA Trends – Drier Operator
0
2
4
6
8
10
12
14
1-Dec-00 29-Nov-02 29-Nov-04 29-Nov-06 29-Nov-08
LLAA(Bqm-3)
Dri...
17
Reporting Doses to Regulators
• Reported to EPA-RPD in Quarterly ISR
Meetings
– Dose statistics
– Average and maximum d...
Dealing with Incidents (“Reportable” or Otherwise)
• PFN tool generator chamber breakage – March 2009
– Checked for possib...
EPA Annual Report 2009 - Excerpt regarding Beverley
he annual reports of [Beverley] for 2008 indicated the average
annual ...
Thank You - Questions?
20
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Transcript of "Keeping radiation management at beverley uranium mine at best practice woods"

  1. 1. 1 August, 2007 35th ARPS CONFERENCE Adelaide, 19 October 2010 Keeping Radiation Management at Beverley Uranium Mine at Best Practice; Plans, Responses and Outcomes Sankaran Kutty, Peter Woods, Elvin Dayal, Alice Jagger
  2. 2. About Beverley 2 Approx. 550 km north of Adelaide By company plane: ~1 hr from Parafield ~1/2 hr from Pt Augusta
  3. 3. Brief History of Beverley Mine • 1969 Discovered • 1982 First draft EIS • Process not completed due to ‘3-mine policy’ • 1998 New Draft EIS and Supplement • 1999 Environmental approval was granted in March, other Federal and State approvals were obtained as required – First Radiation Management Plan and Radioactive Waste Management Plan (RMP and RWMP) • Late 2000 first production – Between 546 and 1,084 tonnes (as U3O8) per year since 2001 – Recently around 7% of Australian production 3
  4. 4. Natural Uranium in the Frome Basin Aerial gamma survey •Used as an exploration tool •Measures mainly surface radiation •Shows that the Flinders Ranges are very rich in uranium •Radiation levels are lower than many “hot spots” in the world 4
  5. 5. Natural Uranium in the Frome Basin – Take 2 5 •Same data, but use of ‘hot’ colours could be incorrectly interpreted as showing dangerous levels are present •Fine for experts, not so good for the general public?
  6. 6. How the Beverley ISR Mine Works Mining Process: 1. Groundwater pumped to surface 2. Small amount of acid and oxidant added 3. Water pumped back into aquifer 4. Uranium dissolved 5. Water pumped to surface 6. Uranium taken out of the water 7. Water recycled -back to 2 6
  7. 7. Extensions and Plans for Future Mining at and near Beverley • 2006-08 Mine Lease Extension – Risk Assessment approach – Updated Mining and Rehabilitation Plan (MARP) – Updated RMP and RWMP to new guidelines • 2009-10 Beverley North Project – Field Leach Trial at the Pepegoona deposit (approved) – Routine mining (under assessment) – Covered by its own MARP and further updates to the Beverley RMP and RWMP • 2008 - ? Four Mile Project – Commonwealth approval granted – Delayed by circumstances beyond Heathgate’s control – Draft separate RMP and RWMP prepared 7
  8. 8. How the Beverley North Satellite Mine will Work 8
  9. 9. 9 Work Areas • The main operational components of the mine site are – Wellfields from where the uranium is extracted – Process Plant where the recovered uranium is processed and packed
  10. 10. 10 Employee Work Groups (for Dose Calculations) • Production – Plant and wellfield operators, maintenance staff, laboratory staff and associated supervisors • Geology and Drilling – Drillers, geologists & their support staff • Projects – Construction personnel • Contractors – e.g. cleaners, electrical • Others – Environment, Safety & Health (ESH) & other office based staff
  11. 11. • Worker limit is 20 milliSieverts (mSv) per year averaged over 5 years and not to exceed 50 mSv in any one year; public limit is 1 mSv/yr • Some areas in the world are naturally over 20 mSv/yr • Long-term studies only pick up health detriment at levels well above these Radiation Protection Outcomes - Overview Year Ave. worker dose Max. worker dose 2001 0.63 4.37 2002 0.74 3.35 2003 0.68 3.33 2004 0.89 4.53 2005 0.48 3.59 2006 0.45 7.59 2007 0.28 3.46 2008 0.27 2.66 2009 0.22 2.98 11
  12. 12. 12 Average Dose Received by Work Groups (2009) 0.00 0.25 0.50 0.75 1.00 Production Maintenance Geology& Drilling Projects Other Contractors AverageEffectiveDose(mSv) LLA RnD Gamma
  13. 13. Quarterly Dose Trends – Total Effective Dose 0 1 2 3 4 5 31-Dec-00 31-Dec-01 31-Dec-02 31-Dec-03 31-Dec-04 31-Dec-05 31-Dec-06 31-Dec-07 31-Dec-08 31-Dec-09 TotalEffectiveDose(mSv) Average Max Pro-rata Designated Employee Dose Limit( 20 mSv/year) (5mSv/qtr) 13
  14. 14. Quarterly LLAA Trends – General Area Dust 0.00 0.10 0.20 0.30 0.40 31-Dec- 00 31-Dec- 01 31-Dec- 02 31-Dec- 03 31-Dec- 04 31-Dec- 05 31-Dec- 06 31-Dec- 07 31-Dec- 08 31-Dec- 09 LLAA(Bqm-3) Plant Wellfield Office Areas Investigation level 14
  15. 15. Quarterly LLAA Trends – Drier and Packing Room 0.0 2.0 4.0 6.0 8.0 10.0 12.0 31-Dec- 00 31-Dec- 01 31-Dec- 02 31-Dec- 03 31-Dec- 04 31-Dec- 05 31-Dec- 06 31-Dec- 07 31-Dec- 08 31-Dec- 09 LLAA(Bqm-3) Drier Packing Room Packing Warehouse Investigation LevelforDrier& Packing Room 15
  16. 16. Quarterly LLAA Trends – Drier Operator 0 2 4 6 8 10 12 14 1-Dec-00 29-Nov-02 29-Nov-04 29-Nov-06 29-Nov-08 LLAA(Bqm-3) DrierOperator Current InvestigationLevel 1Bqm-3 16 Capital investment to improve enclosure
  17. 17. 17 Reporting Doses to Regulators • Reported to EPA-RPD in Quarterly ISR Meetings – Dose statistics – Average and maximum doses from different pathways received by work groups – Individual employee doses are not reported – Any incidents or unusual activities/trends • Australian National Radiation Dose Register – Data being provided as of 2010, still need to create an efficient transfer mechanism
  18. 18. Dealing with Incidents (“Reportable” or Otherwise) • PFN tool generator chamber breakage – March 2009 – Checked for possible tritium release – EPA assisted with beta analysis – Negligible dose 18 • Logging neutron source 111 GBq Am-Be – May 2008 – Several days lost in exploration hole – Eventually recovered – Minor superficial damage to casing, not capsule, no leakage (negligible dose) – On-sold in 2010
  19. 19. EPA Annual Report 2009 - Excerpt regarding Beverley he annual reports of [Beverley] for 2008 indicated the average annual dose for workers at the Beverley mine was approximately 1.4% of the 20-mSv annual occupational dose limit. The maximum dose received by a worker was approximately 13% of the annual limit. nvironmental monitoring confirms doses to members of the public, as a result of the mining operations, are indistinguishable from background radiation levels. o incidents were reported during 2008–09. ttp://www.epa.sa.gov.au/about_epa/annual_report 19
  20. 20. Thank You - Questions? 20
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