UK Public Sector Contracts & Tenders

Background Maentwrog Power Station is a 30MW hydroelectric power station located just outside the village of Maentwrog. The station draws its water supply from Trawsfynydd Lake located above the station. The lake is man made, and was formed by the construction of four dams, which between them impound the water to form Llyn Trawsfynydd. A series of canals, called leats, have been constructed in the adjoining mountain sides, which direct the rainfall from the mountain sides into the lake, thus increasing the lakes catchment area. Scope of Works To provide a plant and labour resource on a ‘call off’ basis to support general civil maintenance within the lake’s 35 sq mile catchment area and at the Power Station Site. This call off may be required at very short notice, less than 24 hours but a 2 to 3 week notice period is more typical. Typical examples of this work could be but not limited to: • Excavation work utilising excavator type machinery, in and out of shallow water environments • General carpentry & light metal fabrication works • General masonry repairs & plastering • Catchment maintenance, which would typically include: o Gravel removal and general pitching repairs local to Weirs o Concrete repairs and expansion joint resealing o Gate & Fencing repairs and replacement o Manual ditch clearance • Laying of small structure bases, such as bases for steel trellis access platforms • General hand digging and soil removal, such as from under pipes and other areas where access via excavators is generally not possible due to the terrain. • Assistance in transporting heavy equipment or plant from power station to remote areas, utilising a telehandler or excavator/JCB jib.

Nuclear Restoration Services Limited (Dounreay) are undertaking a series of services upgrades and refurbishment work within the D1310 Laboratories. A Contractor is required to undertake mechanical, electrical and architectural design, refurbishment and commissioning activities.

Carry out routine and statutory examination/inspection and consultancy services across the NDA OpCos - NRS, NRS Dounreay, Sellafield, NNL, NWS & NTS

Carry out trials to demonstrate the feasibility of using a mobile mixer to generate concrete and grout to the required bespoke specification for the encapsulation of nuclear waste.

Carry out trials to demonstrate the feasibility of using a mobile mixer to generate concrete and grout to the required bespoke specification for the encapsulation of nuclear waste.

Carry out trials to demonstrate the feasibility of using a mobile mixer to generate concrete and grout to the required bespoke specification for the encapsulation of nuclear waste.

D60 Crane - Electrical Upgrade - The contractor shall undertake the following: • Complete Rewiring of the crane, including power and control circuits. • Modernisation of Electrical Systems, including: - Replacement of obsolete power distribution components. - Installation of modern control systems (e.g., PLC-based or equivalent). - Integration of future-proofing features such as diagnostics for example • Testing and Commissioning of all upgraded systems to ensure full operational functionality and compliance. To obtain further information, including all documentation, please follow these steps: 1. Log in to the supplier portal at: https://atamis-2464.my.site.com/s/Welcome. 2. Locate the opportunity using 'Find Opportunities' or use ref C28332 3. Register Interest 4. Access documentation and submit response within 'My Proposals and Quotes'

“The Consultant shall provide a competent Principal Designer service for the Project (Removal of Boilers at Dungeness A Site) to fulfil the Principal Designer Duties and responsibilities as laid out in the current CDM 2015 Regulations, and to support the Principal Contractor and NRS as Client in fulfilling their duties and responsibilities under CDM 2015. The overview of the role of the Consultant is to plan, manage, and monitor the Pre-Construction Phase, and co-ordinate construction health and safety during this phase to ensure that the project is carried out without risk to health and safety (as far as is reasonably practicable; it is not possible to ensure that construction work is carried out without risk).”

Provision of Security Guards to provide security services to sites within the Nuclear Decommissioning Estate, including NRS Sites (including transferring AGR Sites), Dounreay Site, Nuclear Transport Services (Specifically Direct Rail Services), Nuclear Waste Services and Vulcan. Security Services include the delivery of Guarding services, CCTV / alarm monitoring, Control of Access & Security Passes, Emergency Response, Patrols, Management of Visitors & Passes, Key Holding, Canine Detection, Reception Services and Alarm Response Centres.

Nuclear Restoration Services (NRS) Limited (Dounreay) is seeking to establish a Contract for the Provision of a Home to Work transport service to convey personnel and other users (approximately 265 people daily average) from designated pick-up points to the Dounreay Site and return journey. The duration of the Contract shall be up to a maximum of 5 years (3+1+1) from August 2026 to July 2029 with the option to extend for a further 1 + 1 years following mutual agreement by both parties. NRS Limited (Dounreay) invite interested Contractors to an online Supplier Engagement Presentation and Feedback session on 4th February 2026 at 1000 hours. Please respond to this notice through Atamis to confirm attendance by Tuesday 3rd February 2026. 1. Log in to the supplier portal at: https://atamis-2464.my.site.com/s/Welcome 2. Locate the opportunity using 'Find Opportunities' or use ref C29431 3. Register Interest 4. Access documentation and submit response within 'My Proposals and Quotes'

Calibration and Maintenance of Radiological Instruments - Installed 2027+ to cover all NRS Sites including additional sites (AGR transfers from EDF)

Calibration and Maintenance of Radiological Instruments - Portable 2027+ to cover all NRS Sites including additional sites (AGR transfers from EDF)

Nuclear Restoration Services (NRS) Limited (Dounreay) is seeking to establish a Contract for the Provision of Canine Support Services with explosive search capacity to the Dounreay Site. The duration of the Contract shall be up to a maximum of 4 years (2+1+1) from September 2026 to September 2028 with the option to extend for a further 2 years following mutual agreement by both parties. NRS Limited (Dounreay) invite interested Contractors to an online Preliminary Market Engagement Presentation and Feedback session on 31st March 2026 at 1100 hours. Please respond to this notice through Atamis to confirm attendance by 1200 noon on 26th March 2026. 1. Log in to the supplier portal at: https://atamis-2464.my.site.com/s/Welcome 2. Locate the opportunity using 'Find Opportunities' or use ref C30236 3. Register Interest 4. Access documentation and submit response within 'My Proposals and Quotes'

The Contracting authority seeks to inform the market of its intention to commence a procurement process by early 2025, to establish a Framework for a range of characterisation services. <br/><br/>Access to characterisation services is required to support the provision of relevant information about the physical, chemical and radiochemical properties of wastes and other materials. <br/><br/>It is anticipated that the Framework services include but are not limited to; laboratory analysis, fingerprint services and additional characterisation services, such as technical consulting, across up to 4 lots; <br/><br/>Lot 1 - Analytical Laboratory Services (excluding ILW samples requiring specialist facilities due to higher radioactivity levels) - (single provider lot) <br/>Lot 2- Fingerprint Services - (single provider lot)<br/>Lot 3- Laboratory Services – (multi provider lot)<br/>Lot 4 -Additional Characterisation Services - (multi provider lot)<br/><br/>Anticipated Framework is to support Nuclear Restoration Services (NRS) requirements. Access to some NDA OpCos is also possible via multi provider lots, (whilst it is envisaged that usage outside of NRS will be limited)

Procurement, Manufacture, Installation and Commissioning for Prototype Fast Reactor Ventilation Upgrades

Nuclear Restoration Services Limited (NRS) is the new Company name for Magnox Ltd which formally change on 2nd April 2024. A world leader in its field, NRS is responsible for safely decommissioning the first generation nuclear and research sites across the UK and restoring the sites for all our futures. Our new brand represents the joining together of the Magnox sites and Dounreay. It also prepares us to welcome the seven advanced gas-cooled reactor sites (AGRs), currently managed by EDF, for decommissioning, as well as other future missions. NRS is an operating company of the Nuclear Decommissioning Authority (NDA) and is responsible for decommissioning 14 nuclear sites and operating one hydro-electric plant, with sites spread across the UK. Many of our sites are in low population areas. The scope of these services is to deliver Project Controls and Commercial Support Services to support the Programme Management Office (PMO), and the Commercial Function. NRS (not including Dounreay) currently employs ~85 staff within the project controls function who are distributed across all of the Magnox sites. There are ~ 75 staff within the Procurement and Supply Chain function. The function is split into Programmes and Category Management. The incumbent contractor provides the following roles to supplement the NRS teams when required: a) Project Planning b) Cost Engineering c) Cost Estimating d) Risk Engineering e) Project Controls Managers f) Senior Contract Management g) Quantity Surveying (Standard and Senior) h) Procurement Lead Tenderers must register their interest, obtain further information for this notice and submit their response via the Nuclear Decommissioning Authority and Sellafield Ltd.'s e-procurement system (ATAMIS). This can be found at the following address: https://one-nda.force.com/s/Welcome Initial registration of your company is achieved by using the above site and then clicking on "Register Here". The Project Controls & Commercial Services (2026+) PIN can be found within reference C19439.

NRS are seeking to put in place a Professional Services Contract with a supplier for the provision of two Pension Trustee Directors with investment expertise. This is in relation to NRS’ legacy Defined Benefits pension scheme and its Corporate Trustee Board. As the service is in relation to a Corporate Trustee Board, NRS must appoint two different suppliers.

Nuclear Restoration Services Limited (Dounreay) intends to procure a contractor to complete the remaining mechanical and electrical (M&E) works for the DCP Store Extension project at the Dounreay Nuclear site in Caithness, Scotland.<br/>The scope includes the installation, modification, and commissioning of various systems across multiple buildings and external areas, including:<br/><br/>Heating, Ventilation, and Air Conditioning (HVAC) systems<br/>Electrical power, lighting, and earthing systems<br/>Control and instrumentation systems<br/>Associated testing, commissioning, and handover activities.<br/>The M&E works are critical for the successful completion and operation of the DCP Store Extension, which is a key enabler for the site's decommissioning programme.<br/>Interested parties should register on the Atamis web portal at https://atamis-2464.my.site.com/s/Welcome. Once in the portal, the project can be viewed under live opportunities. Any documentation and further notifications will be made available for unrestricted and full access, free of charge on Atamis.<br/>Include the Atamis URL:<br/><br/>https://atamis-2464.my.site.com/s/Welcome

Collaborative NDA Procurement - NRS Lead Contracting Authority Carry out routine and statutory examination/inspection and consultancy services across the NDA OpCos - NRS, NRS Dounreay, Sellafield, NNL, NWS & NTS