Repository Development (RD) Southern Trench Cap Interim Membrane Replacement (STIM) Project

Concepts

• construction work
• calder bridge
• adjacent trenches
• repository development
• repository development programme
• a southern trench cap interim membrane replacement contract
• the southern trench cap interim membrane replacement package
• llw repository ltd
• llw repository ltd trading
• an engineered interim trench cap

Location

Old Shore Road, Holmrook, Cumbria, CA19 1XP

Description

LLW Repository Ltd trading as Nuclear Waste Services has a scope of work for the “Southern Trench Cap Interim Membrane (STIM) Replacement Contract”, which forms part of the Repository Development portfolio of work at the LLW Repository facility near Drigg Village in Cumbria, England.The scope consists of civil engineering works associated with installing an engineered interim trench cap over the Southern Trenches. In summary, the scope is to provide labour, equipment, materials, project management and supervision to complete the work. Work also includes establishment and maintenance of site offices, welfare and all associated temporary works.

Total Quantity or Scope

The scope consists of civil engineering works associated with installing an engineered interim trench cap over the Southern Trenches at LLWR Site near Drigg, Cumbria. Repository Development is a long-term portfolio of works that will provide disposal capacity and protection of low-level nuclear waste over the next 107 years, or until the end life of the Repository Site. In the shorter term, the portfolio, over the next 15 years, will install closure engineering works for short and long-term environmental protection for wastes currently disposed in Vault 8 and the adjacent trenches. This scope of works has been previously referred to as Repository Development Programme – Tranche 1 Main Civils and has been communicated to the market in early 2022. The works over the next 15 years have been considered and optimised detailed designs completed. More recently, the delivery strategy for the works has been further developed and subsequently split into projects that deliver a key benefit to the closure of Vault 8 and adjacent trenches. This procurement is required to enable delivery of the Southern Trench Cap Interim Membrane Replacement Package for Repository Development within the Waste Operations Portfolio. The total estimated value of the 4 year contract is £53m. The key scope elements are summarised in Appendix 3 - LLWR-RDP-T1.ST-SCO-001-STIM Scope.The Contracting Authority will procure for a Southern Trench Cap Interim Membrane Replacement Contract via the Restricted Procedure. The Contracting Authority will hold a two phase procurement, Selection Questionnaire and Invitation to Tender to appoint a single Contractor.

CPV Codes

• 45000000 - Construction work
• 45200000 - Works for complete or part construction and civil engineering work
• 71000000 - Architectural, construction, engineering and inspection services
• 45112300 - Infill and land-reclamation work
• 44900000 - Stone for construction, limestone, gypsum and slate
• 45112000 - Excavating and earthmoving work
• 45112500 - Earthmoving work
• 45500000 - Hire of construction and civil engineering machinery and equipment with operator
• 45112360 - Land rehabilitation work
• 45220000 - Engineering works and construction works
• 45112310 - Infill work
• 45222000 - Construction work for engineering works except bridges, tunnels, shafts and subways
• 45112600 - Cut and fill

Indicators

• Bids should cover the whole contract.
• Renewals are not available.
• Award on basis of price and quality.

Other Information

Organisations are invited to submit their SQ responses via NWS’s Atamis system (https://atamis-2464.my.site.com/s/Welcome), which can be accessed against Record Ref C13244 (RD – Southern Trench Cap Interim Membrane Replacement Project) which is listed within the ‘Find Opportunities’ area on the portal. General scope overview: - Location of existing underground services within working areas, including trial holes / hand excavation to confirm position. The Contractor is responsible for determining what instruments and latest technologies are adopted for locating underground services. - Vegetation clearance, consisting of scrubland and trees. - Topsoil strip, material to be re-used in the permanent works, subject to material testing results to specification requirements. - Any existing tarmac areas to be removed to be Polycyclic Aromatic Hydrocarbon Detection (PAK) tested. - Installation of control measures (e.g. silt fencing / temporary bunds) to prevent silty construction water run-off from entering existing watercourses and newly excavated drainage. - Construction temporary traffic management signage, including any necessary temporary works design. Contractor to determine exact type and number of signs to satisfy their Traffic Management Plan. Signs to be surface mounted / movable. - Temporary fencing and demarcation to segregate construction areas. - Stockpiles of free issue materials are to be jointly surveyed by the Contractor and the Client and the quantity agreed prior to use. Thereafter, the Contractor is to manage and reconcile the quantities of materials to and from the stockpiles. - Installation of an Intercepting manhole/chamber between two existing drains on Street 5.