The CEA is planning the construction of a building to extend an existing installation in the center of Valduc. In order to guarantee the perfect preparation of the selected location, the CEA wishes, through the contract subject to this notice, to carry out the preparatory work necessary for the development of the construction area. This work corresponds to the following services: - Layout of the construction site area; - The removal and rerouting of existing networks in the area; - The redevelopment of the merlon located on the building adjacent to the future building, including the removal of existing works; - The creation of the platform of the future building and the future living bases for the works phase; - Removal of excess excavated materials from the site; - The supply of all the necessary networks (including Waste Water, Industrial Water, Drinking Water, Infrastructure for High Currents and Low Industrial Currents). The work in this Contract corresponds to the preparatory work prior to the construction of an extension to an existing Building. This work includes the following: • The Contractor’s site installation area, including site signage, • The creation of elements ensuring the delimitation of the future construction site area which includes: o Implementation of limitations for future works o The installation of protective fences and barriers o The creation of the platform and constraints associated with the future guard station, including dry and wet networks • The removal and/or rerouting of dry and wet networks (including EP, EI, AEP, CFO, CFI,) • The redevelopment of the merlon of the existing building with the associated constraints including in particular: o Removal of the merlon (approximately 7500m3) o Removal of existing reinforced concrete structures (retaining structures and exterior gallery) o The construction of new reinforced concrete retaining structures for the roof merlon of approximately 50ml o The cladding of the exterior wall of the existing building, including all constraints (approximately 60m x 12m) • The development of the platform for the future extension (approximately 1500 m3 of excavation) (depth of approximately 1m) • The development of the life base area for an approximate surface area of 1300m² • Evacuation of excavated materials (drop-off zone on the site 1.5 km one way) • The installation of networks, substations and electrical equipment for the future site from the existing building (1 general site distribution cabinet supplying the camp sites, cranes and site boxes) • The installation of dry and wet network arrivals for future construction site bases • Removal and evacuation of the existing HV/LV electrical substation present on the site site as well as associated structures, including electrical connections • G3 mission type geotechnical monitoring • The installation of candelabras on wooden posts with speakers (around ten) • The establishment of all the documents necessary for the proper execution of the work (execution studies, site organization documents, etc.) mentioned above • Carrying out checks and tests to be carried out for the positions mentioned above • The file of works executed The optional services to be carried out under the contract are described below. The services provided for at the BPU will notably concern the following areas: • The detour of a truck of excavated soil through the entrance to the Valduc center for radiological control (distance 6km one way) • Evacuation of excess excavated materials on site • A one-day work stoppage • A work stoppage of one working week NOTE 1: this list of services provided for in the BPU is not exhaustive. NOTE 2: The volumes specified above correspond to quantities estimated by the CEA. They do not constitute a commitment by the CEA. The optional market services are as follows: • The expansion of the storm basin (130m3 maximum) • Supply of life bases from a future HT BT station (outside the scope of this market) (around 200ml) The services take place at the CEA/DAM VALDUC Protected Zone center with access and operating constraints.

The Other organizations in France from Europe region has released this tender for The CEA is planning the construction of a building to extend an existing installation in the center of Valduc. In order to guarantee the perfect preparation of the selected location, the CEA wishes, through the contract subject to this notice, to carry out the preparatory work necessary for the development of the construction area. This work corresponds to the following services: - Layout of the construction site area; - The removal and rerouting of existing networks in the area; - The redevelopment of the merlon located on the building adjacent to the future building, including the removal of existing works; - The creation of the platform of the future building and the future living bases for the works phase; - Removal of excess excavated materials from the site; - The supply of all the necessary networks (including Waste Water, Industrial Water, Drinking Water, Infrastructure for High Currents and Low Industrial Currents). The work in this Contract corresponds to the preparatory work prior to the construction of an extension to an existing Building. This work includes the following: • The Contractor’s site installation area, including site signage, • The creation of elements ensuring the delimitation of the future construction site area which includes: o Implementation of limitations for future works o The installation of protective fences and barriers o The creation of the platform and constraints associated with the future guard station, including dry and wet networks • The removal and/or rerouting of dry and wet networks (including EP, EI, AEP, CFO, CFI,) • The redevelopment of the merlon of the existing building with the associated constraints including in particular: o Removal of the merlon (approximately 7500m3) o Removal of existing reinforced concrete structures (retaining structures and exterior gallery) o The construction of new reinforced concrete retaining structures for the roof merlon of approximately 50ml o The cladding of the exterior wall of the existing building, including all constraints (approximately 60m x 12m) • The development of the platform for the future extension (approximately 1500 m3 of excavation) (depth of approximately 1m) • The development of the life base area for an approximate surface area of 1300m² • Evacuation of excavated materials (drop-off zone on the site 1.5 km one way) • The installation of networks, substations and electrical equipment for the future site from the existing building (1 general site distribution cabinet supplying the camp sites, cranes and site boxes) • The installation of dry and wet network arrivals for future construction site bases • Removal and evacuation of the existing HV/LV electrical substation present on the site site as well as associated structures, including electrical connections • G3 mission type geotechnical monitoring • The installation of candelabras on wooden posts with speakers (around ten) • The establishment of all the documents necessary for the proper execution of the work (execution studies, site organization documents, etc.) mentioned above • Carrying out checks and tests to be carried out for the positions mentioned above • The file of works executed The optional services to be carried out under the contract are described below. The services provided for at the BPU will notably concern the following areas: • The detour of a truck of excavated soil through the entrance to the Valduc center for radiological control (distance 6km one way) • Evacuation of excess excavated materials on site • A one-day work stoppage • A work stoppage of one working week NOTE 1: this list of services provided for in the BPU is not exhaustive. NOTE 2: The volumes specified above correspond to quantities estimated by the CEA. They do not constitute a commitment by the CEA. The optional market services are as follows: • The expansion of the storm basin (130m3 maximum) • Supply of life bases from a future HT BT station (outside the scope of this market) (around 200ml) The services take place at the CEA/DAM VALDUC Protected Zone center with access and operating constraints. with tender notice no. B26-06020-C published on 30 Jul 2026. The tender is due to expire on 25 Sep 2026. This tender is sourced from Marches publics and is eligible for suppliers interested in Site preparation and clearance work, Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork, Construction management services, Construction-site supervision services, Construction project management services. Interested bidders can obtain further information including complete bid documents or ways to participate by registering on Tender Impulse and referencing via Tender Impulse ID 14078484.