kevin scissons, canada october 2019 - nucleus...decommissioning activities, completed works *...

1

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….”

2 K Scissons Oct 2019

*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


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.

K Scissons Oct 2019 4

5

Interested Parties Involvement in the Process

K Scissons Oct 2019

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.


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


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.


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.


11

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.


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.

13

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

15 K Scissons Oct 2019 2017 - AREVA

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


Ore pads

Minewater Line to mill

2008

2003


Cluff Lake

2017

- AREVA

2002

2009

18 K Scissons Oct 2019 2017 - AREVA

September 2008

May 2009


- K. Scissons

Island Lake

20

Tails Dam

K Scissons Oct 2019

Snake Lake

- AREVA

Snake Lake

21

Tailings Area

Till Borrow Area

K Scissons Oct 2019

E. Diversion Channel - AREVA

Outlet Channel

W. Run off channel

September 2008

May 2009

22

Tails Dam TMA

K Scissons Oct 2019

2017

- AREVA

Ludlum gamma meter with GPS


- CNSC

*Post-Decommissioning Monitoring

*On-Going

*Routine environmental monitoring

*Status of the Environment Report (every 5 years)

*Task Specific

*Follow-up Program

*Radiological clearance


*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


*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



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

kevin scissons, canada october 2019 - nucleus...decommissioning activities, completed works *...

Documents