Document library

9G121 - Active Drains (Final Delay Tank)
The Active Drains are a system across the active site areas (i.e. reactor buildings and Ponds complex), designed to collect spillages, surface waters and other contaminated effluent and route it, via the Active Drains Tank (ADT), to the Active Effluent Treatment Plant (AETP) for treatment prior to discharge to Llyn Trawsfynydd. The Active Drains have collected effluents over the generating, defueling and decommissioning phases and thus have a spectrum of contamination including activation and fission products. This waste stream was created to capture waste associated with “System 3” consisting of the manholes and connections associated with the pipework between the Final Delay Tank (FDT) and discharge point at manhole MH430.

Magnox Ltd | Trawsfynydd | LLW

9G124 - Loose Particulate Waste North and South FED vaults
This waste arises from the 32 FED vaults (16 North and 16 South) and is FED dust from the base of the vault.

Magnox Ltd | Trawsfynydd | ILW

9G125 - R2 Pressure Vessel Sampling Inspection Equipment
Predominately metal equipment removed from the reactor core.

Magnox Ltd | Trawsfynydd | ILW

9G126 - DWTP Sand Filtration Vessel
The waste has arisen from Main Sludge Vault operations

Magnox Ltd | Trawsfynydd | ILW

9G129 - Active Waste Vaults ILW

Magnox Ltd | Trawsfynydd | ILW

9G129/C - Active Waste Vaults ILW
Waste streams 9G64, 9G72, 9G73, 9G79, 9G125, 9G126, 9G129 and 9G131 will be co-packaged. Combined waste stream composition data not yet been assessed. As of 31/03/2022, sixteen 3m3 boxes have been conditioned. Wastestreams included in the containers are : 9G64 - 18 wt%; 9G72 - 33 wt%; 9G73 - 22 wt%; 9G79 - 27 wt%.

Magnox Ltd | Trawsfynydd | ILW

9G130 - Flux Detectors
NFDs are gas filled radiation detectors that were inserted into reactor bioshield penetrations called 'thermal columns' to measure the neutron flux during operation.

Magnox Ltd | Trawsfynydd | ILW

9G131 - AETP Sand & Sludge

Magnox Ltd | Trawsfynydd | ILW

9G16/C - Sludge - Conditioned Material
Sludge retrieved from the main sludge vault and solidified in the solidification plant at Trawsfynydd.

Magnox Ltd | Trawsfynydd | ILW

9G18/C - Ion Exchange Material - Conditioned Waste
Ion exchange materials retrieved from storage tanks (resin vault 1) and solidified in the solidification plant at Trawsfynydd (campaigns 3 and 5).

Magnox Ltd | Trawsfynydd | ILW