Document library

3L18 - Miscellaneous Sludges
Waste arises from the treatment of active effluent. Occasionally sludge cannot be transferred to purpose built storage vessels and is removed from process/treatment vessels into drums, IBCs or similar containers for storage prior to characterisation and disposal.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | LLW

3L19 - Catalyst
Exhausted catalysts that have been used for the recombination of carbon dioxide reactor coolant.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L20 - Miscellaneous Activated Components - Debris Vault 3
Irradiated reactor control rods, control rod chains and graphite specimen assemblies.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L21 - Miscellaneous Activated Components - Spalled Oxide and Dust
Irradiated dusts and spalled oxide.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L22 - Fuel Stringer Debris - Debris Vault 4
Components resulting from the dismantling of fuel element stringers. Some additional high activity components, in steel tins, may also be present

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L23 - Miscellaneous Activated Components - Tie Bar Ends & Nuts
Metallic components resulting from the dismantling of fuel element stringers.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L25 - Miscellaneous Activated Components & Fuel Stringer Debris - Debris Vault 2
Metallic components resulting from the dismantling of fuel element stringers. Some additional high activity components, in steel tins, may also be present

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L27 - Bypass Blowdown Filters (LLW)
BPBDFs remove particulate from the primary coolant circuit. The BPBDF is provided with a back flush facility for periodic in-service dust removal. During the blowback, the dislodged particulate is transferred to the DSEF. Both filters require replacement when differential pressure drops below a certain level.

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | LLW

3L28 - WET CARBONACEOUS DEBRIS
This waste stream is predominantly on the base of the pond and arises from fuel elements passing through the pond

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | ILW

3L29 - Fuel Plug Units
In advanced gas-cooled reactors (AGRs), the Fuel Plug Unit (FPU) is found at the top of each fuel stringer assembly in the reactor. The fuel stringer assembly and its associated FPU form a composite fuel assembly that is handled by the charge machine and loaded into the reactor as one unit. Once in the reactor, gas flow is forced up passed the fuel by gas circulators, cooling the fuel in the process. The rate of gas flow, and hence the temperature of the fuel, is controlled by a ‘gag’ in the FPU. The total length of an FPU is ca. 11.3m with a maximum diameter of ca. 0.3m

EDF Energy Nuclear Generation Ltd (EDFE NGL) | Heysham 1 | LLW