Lifetime strategy
CYM | 
ENG
The current preferred strategy for decommissioning the Trawsfynydd site like all UK Magnox nuclear power stations is deferred site clearance, allowing for total site clearance around 100 years after cessation of generation. It minimises risk to workers, the public and the environment; minimises waste volumes; is technically straight forward and makes financial sense.
Magnox North is applying its knowledge and expertise to accelerate the decommissioning work plan which doesn’t preclude a reduction in the 100-year period to total site clearance.
Trawsfynydd’s decommissioning programme is now entering its sixteenth year with defuelling successfully completed and key project milestones reached including the demolition and landscaping of the turbine hall and the cooling water pumphouse, the construction of a Intermediate Level Waste (ILW) store, bulk retrievals of the Miscellaneous Activated Components (MAC) waste steam complete and the completion of boiler deplanting within the reactor buildings.
The decommissioning plan at Trawsfynydd
1995 - 2015: Preparation for Care & Maintenance
- Building of a waste store for the treatment and packaging of Intermediate-Level Waste (ILW) that has accumulated in storage vaults on the site during generation operations – due for completion 2007
- Demolition of the ponds complex once operational legacy waste is recovered and processed for safe and stable site storage – scheduled for demolition 2011
- Completion of all waste management, dismantling and demolition work, removing most radioactive and non-radioactive plant and buildings
- Safestore buildings construction – reducing the Reactor buildings in height to minimise the environmental impact and placing them into a passive, safe and secure state
2015 - 2088: Care & Maintenance
- Site monitored for reactor conditions and security as the radioactivity inside the reactors naturally decays
- Radiological and environmental monitoring
- Regular inspection of site conditions and maintenance where necessary
- All stored packaged waste transported for permanent disposal off site and demolition of the waste store once a National Repository for ILW becomes available
2088 - 2098: Final Site Clearance
- Deplanting and dismantling of the remaining site utilities, facilities and buildings
- Land remediation including landscaping and planting
- Site delicenced and returned, clean and safe for future use
