RSRL Integrated Waste Strategy - Issue 5- Oct 2012.pdf

NOT PROTECTIVELY MARKED5.2 Winfrith186. The Winfrith site strategy is to achieve an Interim End State by 2024 when all the ILWhas been packaged into final disposal packages (RCBs) and will have been transferred offthe Winfrith site for long-term storage in the Harwell ILW store. All redundant buildings willhave been demolished and the site will then be passively managed by applying land userestrictions whilst residual radioactivity decays. After a period of time (envisaged to bedecades), the site will reach a condition when it can be de-licensed then de-designated atwhich point the land use restrictions will no longer be required.187. The key milestones related to waste management for achieving the Interim End State atWinfrith are listed below:YearKey Milestone2013 EAST decommissioning complete2015 Blacknoll Reservoir decommissioned2021 DRAGON decommissioned2023 SGHWR decommissioned2023 Sea pipeline decommissioned2022 ILW transferred to Harwell ILW Store2024 Interim End State188. The strategy for waste processing and interim storage is to be consolidated around theA5 and adjacent B5 areas of the site. The A5 area contains the existing liquid waste(including sewage from the western end of the site) collection, treatment and sea dischargesystems, and the solid waste decontamination, size reduction and packaging facilities. TheB5 area contains the Treated Radwaste Store (TRS).189. The processing of sludge arising from the SGHWR resin beds has been completed andthe encapsulated waste is currently being stored in the TRS pending disposal to the LowLevel Waste Repository. WETP has been demolished and the decommissioning of EAST isunderway with only the tank base and sub-base to complete. The treatment of theremaining historic wastes comprising concrete lined drums and uranium will be undertakenusing the SGHWR ILW Processing Plant at the time of decommissioning SGHWR. Thoriummetal at Winfrith will be transferred to Harwell in 200 litre drums for interim storage. Whilstthe baseline strategy for the thorium is to package and grout it into RCBs prior to disposal tothe GDF, RSRL is actively pursuing sale for re-use in the fuel cycle.190. Decommissioning of the two reactors will occur from 2013 to 2023. LLW arising fromdecommissioning will be processed and disposed using existing disposal routes. Thearisings of ILW will require the installation of a Head Cell, an ILW Transfer system and anILW processing plant within SGHWR and Dragon.191. Other waste operations during this time will be the processing of remaining wastes onsite, including a quantity of sodium metal. .Off-site facilities that are a responsibility ofRSRL IWS (Issue 5 – October 2012)56