STEP Construction Partner (CP)

{
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    "id": "ocds-h6vhtk-0361bf-2026-04-22T12:28:33+01:00",
    "date": "2026-04-22T12:28:33+01:00",
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    "tender": {
        "id": "T-SP050-22",
        "legalBasis": {
            "id": "32014L0024",
            "scheme": "CELEX"
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        "title": "STEP Construction Partner (CP)",
        "status": "complete",
        "classification": {
            "scheme": "CPV",
            "id": "45220000",
            "description": "Engineering works and construction works"
        },
        "mainProcurementCategory": "works",
        "description": "UKIFS (now UKFE) has conducted this Procurement for a Construction Partner, who, together with a Fusion Partner (determined to be United Kingdom Atomic Energy Authority (UKAEA)), will bring together and develop extensive industrial capabilities to design and build a UK prototype fusion energy plant capable of delivering net-energy to the grid, and build a world-leading fusion delivery industry. The Procurement was originally divided into two lots: * Lot 1: Engineering Partner (EP) * Lot 2: Construction Partner (CP) However, Lot 1 - EP has since been cancelled. Lot 2 - CP is now the only Lot included in this Procurement exercise. The contract term for Lot 2 will expire 31 March 2029, followed by three (3) optional extension periods of four (4), six (6) and seven (7) years. UKFE will have the right to exercise an extension option at six (6) months' notice. The maximum contract duration will be twenty (20) years with an estimated value of PS10,000,000,000 across this period.",
        "value": {
            "amount": 20000000000,
            "currency": "GBP"
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                "id": "1",
                "description": "The Engineering Partner's (EP) primary responsibility will be to provide the capability to drive the integrated design of the STEP Prototype Plant (SPP), and to then manufacture that plant through a developing supply chain. This includes (but not be limited to) providing capabilities for management of all engineering data, responsibility for the detailed design of SPP systems, equipment, and components, and contracting through the engineering supply chain. The EP will be responsible for leading a supply chain which delivers the manufacture and assembly of the SPP components. See the procurement documents for further details.",
                "status": "active",
                "title": "Engineering Partner (EP)",
                "value": {
                    "amount": 10000000000,
                    "currency": "GBP"
                },
                "contractPeriod": {
                    "durationInDays": 1080
                },
                "hasRenewal": true,
                "renewal": {
                    "description": "The EP contract term will be an initial 3 year period, followed by 3 optional extension periods of 4, 6 and 7 years (these durations are subject to change as the Programme develops). UKIFS will have the right to exercise an extension option on 6 months' notice. The maximum contract length duration for the EP contract will be 20 years with an estimated value of PS10,000,000,000."
                },
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            },
            {
                "id": "2",
                "title": "Construction Partner",
                "description": "The Construction Partner's (CP) primary responsibility will be to collaboratively provide the capability to drive the integrated design of the overall layout, buildings, infrastructure, onsite and offsite facilities of the STEP Prototype Plant (SPP) to fulfil the support, enclosure and environmental requirements of the operational plant. The CP will then purchase, fabricate, deliver and install all elements of the designed facilities utilising existing and new supply chains, directly sourced or contracted resources. The CP's responsibilities will include (but not be limited to) managing the overall health, safety, environment and security systems applicable to all parties engaged at the site. Additional information: Lot 1 for the Engineering Partner (EP) was cancelled and will not be awarded. Only Lot 2 for the Construction Partner (CP) forms part of this notice.",
                "value": {
                    "amount": 10000000000,
                    "currency": "GBP"
                },
                "contractPeriod": {
                    "durationInDays": 1080
                },
                "hasRenewal": true,
                "renewal": {
                    "description": "The CP contract term will be an initial 3 year period, followed by 3 optional extension periods of 4, 6 and 7 years (these durations are subject to change as the Programme develops). UKIFS will have the right to exercise an extension option on 6 months' notice. The maximum contract length duration for the CP contract will be 20 years with an estimated value of PS10,000,000,000."
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                "deliveryAddresses": [
                    {
                        "region": "UK"
                    },
                    {
                        "region": "UK"
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                    {
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                "relatedLot": "1"
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