2016-02-18 PREDEC 2016, February 16-18, Lyon, France 1
Decommissioning Planning for
Nuclear Units at the
Oskarshamn Site
Niklas Bergh Westinghouse Electric Sweden
Thom Rannemalm, Jörgen Eriksson OKG
• Introduction
• Decommissioning Process
• Present Activities at OKG
• Strategic Options for OKG
• Discussion
• Conclusions
• Near Term Future Works
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 2
Agenda
• Permanent shutdown
– O1: 2032 2017
– O2: 2034 2016
– O3: 2045
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 3
Introduction
BWR Unit Commissioned
Thermal
power [MW]
Electrical
power [MW]
Oskarshamn 1 1972 1 375 491
Oskarshamn 2 1974 1 800 620
Oskarshamn 3 1985 3 900 1 450
• Regulatory: – EIA for Defueling op.
– SAR for Dismantling
– EIA for Dismantling
– EURATOM Article 37
– Waste Management Plan
• Economical – SAR for Shutdown op.
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 4
Decommissioning Process
Shutdown op. Decommissioning &
Dismantling Defueling op.
End of
commercial op.
- Environmental court
approval of EIA - SAR
- Environmental court
approval of EIA - SAR
POWER
OPERATION
DEFUELING SHUTDOWN
OPERATION
DISMANTLING
OPERATION
SITE RESTORATION
Fuel
removal Maintenance/
supervision
Equipment
dismantling and
waste
processing
Building
demolition
Planning
Ground
restor-
ation
Final shutdown Plant cleared
Partial dismantling
• Decommissioning Preparation Project (DPP) with subprojects – Strategy and Planning
– Licensing – Nuclear Regulator
– Licensing – Environmental Court
– HR
– Decommissioning preparation activities
• Development of decommissioning roadmap, licensing documents and identification of prioritized activities
• Will transit into line organisation as a new department in 3-5 months
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Present Activities at OKG
• The organizational model
– Using utility personnel
• Degree of self performance
– Procurement strategy
– Maintaining competence
• Timing between the decommissioning of unit
1 and 2
– When to go into decommissioning
– Length of defueling op., shutdown op.
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 6
Strategic Options for OKG
Ongoing
Completed
• The waste management strategy – Waste streams
– Waste treatment options
– Final/Interim storage options
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 7
Strategic Options for OKG
I Initial
Planning
II Defueling
III Inventory & Charac-terization
IV Deconta-mination
V Dismant-
ling
VI Waste
Manage-ment
VII Demo-lition
VIII Site
Clearan-ce
Define
End-State
requirements
Optimize
waste
handling,
clearance
Plan
dismantling
Apply
deconta-
mination
measures
Characterize
according to
WAC
Develop
Strategies
and Plans
Ongoing
• Separation of systems and buildings
between O1/O2 and O3
– Systems necessary for continued
power production at O3
– Shared systems needed for both
decommissioning and operation
– Definition of decommissioning
area
– Physical separation of systems
and buildings with a new
physical protection
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 8
Strategic Options for OKG
Not started
• Decommissioning systems modification
– Ventilation
– Power supply
– Waste treatment systems
– Free release building/routes
– Handling systems
– Fire protection
– Transport routes
• Stakeholder engagement
– Stakeholder communications plan
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 9
Strategic Options for OKG
Not started
Ongoing
• Prioritized activities, order of planning
activities
• Regulatory review time and approval
• Partial dismantling
• Dependency on final repository
• Physical separation of
site
• Maintaining personnel,
morale and critical skills
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 10
Discussion
• O1 and O2 as one decommissioning project
• Defueling O1 finished 2018
• Defueling O2 finished mid 2017
• Nuclear dismantling start 2019
• Plant cleared 2025
• Target end date 2027 brown field
• Partial dismantling (flexibility) crucial for short schedule
• Prioritized activities: – Personnel change of mindset and critical skills
– Licensing documentation
– Procurement strategy
– Waste management strategy
• Frequent and open communication with regulators and stakeholders critical to success
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 11
Conclusions
• Finalizing prioritized activities
• Decommissioning planning
• Dismantling sequences
• Radiological characterization
• Separation activities
• Physical protection
• Plant modifications for
decommissioning
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 12
Near Term Future Works
2016-02-18 PREDEC 2016, February 16-18, Lyon, France 13
Thank you for your attention!