kevin scissons, canada october 2019 - nucleus...decommissioning activities, completed works *...
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Kevin Scissons,
Canada October 2019
K Scissons Oct 2019
*Key Decommissioning Process Steps and Planning
*Example – Cluff Lake (Canada) Decommissioning
*Post-Decommissioning and Long Term Institutional Control
“Start with the end in mind….”
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*Preliminary Decommission Plan (during operations)
*Application to Decommission
*Technical Assessment (Env. Assessment, if required)
*Public Meetings, Information
*Revised Decommissioning Plan, Long-Term Surveillance
*Public Licensing Hearing(s)
*Reason for Decision, Regulatory Approvals
*Decommissioning Activities, Completed Works
*Regulators Follow-up, monitoring
*Long-Term Surveillance Process and Funding
*Land Registry, Land Titles, or Licence Holder
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Decommissioning plan
1) The final decommissioning plan (updated) should be reviewed and presented to the regulatory body for approval – prior to the commencement of final* decommissioning.
*Good planning also does remediation during the operational life!
2) Proper facility and site characterization activities are a critical aspect of the decommissioning process.
3) An adequate amount of time and effort needs to be devoted to the characterization activity since it drives the planning process in decommissioning.
4) Planning of work schedules, required workforce, required funding, waste volumes, worker exposures and effort required to maintain safe work conditions.
5) An essential part of the decommisisoning plan is public consultation and interested parties’ involvement.
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Interested Parties Involvement in the Process
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Interested Parties meetings on site, or in the community. Clarity, understanding about end points, open dialogue.
- CNSC
Environment
*Any applicable environmental protection laws, regulations or other requirements that need to be met by the decommissioning project are identified.
*The decommissioning tasks that will be performed which could result in an environmental release from the facility and which have an impact on the local environment are identified, and mitigation proposed.
*The potential pathways that could be involved with these releases are described and the potential discharge for each task evaluated, and mitigation proposed as needed.
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Prediction of public doses
A simplified overview of the potential public exposure pathways:
Lecture 12: Authorization process IV- Operations 7
Exposure pathways
Typical exposure pathways model
contaminant
source
Atmosphere
Groundwater
Surface water
Terrestrial Plants
Soil
Terrestrial Animals
Aquatic Plants
Aquatic Animals
Dose to
Humans
Sediment
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Some Example Areas: Emergency procedures
*Site and facility specific emergency plans are a contingency measure designed to address an accident or malfunction scenario.
*The emergency plan that exists at the end of the operating period can be used as the basis for the emergency plan for the decommissioning period.
*This plan can be recorded in a separate document referenced and summarized in the decommissioning plan.
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Radioactive waste management
*All possible waste streams that might be generated as a result of the decommissioning activities are identified.
*The types of waste streams are segregated according to the hazard posed and the waste classification system adopted and include:
*radioactive waste,
*hazardous waste,
*mixed waste,
*other types of non-hazardous waste,
*All recyclable materials and those that can be potentially cleared must be identified and managed separately.
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Dismantling equipment - example
Safe demolition of steel/concrete:
First sheering down the roof ;
and then crushing down the
concrete and brick walls.
Worker Safety Risks
Increase!
Job Hazard Analysis
K Scissons Oct 2019
South Africa - N. Tsurikov
Physical security
*A site specific security system is in place during the operation phase, and is described in the physical security plan existing at the end of operation.
*The security plan that was in place during the operational stage will be ameded as required to meet the security needs of the decommissioning activities (increased personnel and vehicle movement, possibility of unauthorised removal of materials, etc).
*An organizational chart for the physical security function is provided and the responsibilities of the key personnel are defined.
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o Operated 1979 – 2002. Was preceded (1977-78) by a multi-
jurisdictional public EIA/Board of Inquiry. Decomm. end points clarified.
o Decommissioned according to updated plan (2002 – 2006 work)
o Decommissioned mine areas, mill, and tailings management area
o Follow-up program and long-term monitoring continues toward release.
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Decommissioned Claude Waste Rock Pile, Revegetated (2010 ) - K. Scissons
K Scissons Oct 2019
Decommissioning Cluff Lake Mill Area
Mill Area in 2006
Mill Complex Pre 2000
2010
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DJX Pit
Claude Lake Claude Waste Rock DJN Waste Rock
Claude Pit
DJ Underground Access
DJ Overburden
Aerial Photo of Claude and
DJ Operations - 2001
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Ore pads
Minewater Line to mill
2008
2003
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Cluff Lake
2017
- AREVA
2002
2009
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September 2008
May 2009
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- K. Scissons
Island Lake
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Tails Dam
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Snake Lake
- AREVA
Snake Lake
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Tailings Area
Till Borrow Area
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E. Diversion Channel - AREVA
Outlet Channel
W. Run off channel
September 2008
May 2009
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Tails Dam TMA
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2017
- AREVA
Ludlum gamma meter with GPS
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- CNSC
*Post-Decommissioning Monitoring
*On-Going
*Routine environmental monitoring
*Status of the Environment Report (every 5 years)
*Task Specific
*Follow-up Program
*Radiological clearance
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*Saskatchewan’s Institutional Control Program
* (“the landlord”)
*Formal Process:
*Reclaimed Industrial Sites Act – 2006
*Reclaimed Industrial Sites Regulations – 2007
*Recognizes Federal and Provincial Jurisdiction for Uranium Mines
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*ICP Components:
* Application Complete
* Regulators Assess
* Regulators Inspect and Confirm
* Regulatory Approvals/Release Provided
* All with direct Public, Interested Parties input
*Institutional Control Land Registry
*Institutional Control Funding
*Monitoring and Maintenance Fund
*Long-Term Surveillance
*Unforeseen Events (Contingency) Fund
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http://mining.areva.com/canada/liblocal/docs/Information/Publications/Factsheets/2018_Cluff_Lake_Tour_Handout_Web.pdf
“Start with the end in mind…”
28 K Scissons Oct 2019 Thank You! - CNSC
- K. Scissons