Tender: Sizewell C – Supply and Installation of Containment Monitoring System for Nuclear Island and CRX

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Sizewell C is seeking a supplier for the design, supply, installation, commissioning and documentation of an EAU containment (HR) monitoring system for the CRX and Nuclear Island Building. The contract covers more than 200 embedded and installed sensors (including extensometers, temperature probes, hydraulic levelling pots, pendulums, invar wires, inclinometers, hygrometers and pressure sensors), associated cabling, connection/grouping boxes, data acquisition/logger cabinets, and all required software interfaces and data collection/reporting tools. The system must provide real-time and periodic data on settlements and deformations of the nuclear island raft, overall containment distortions, localized deformations and tendon failure detection, tension in prestressed cables, and environmental parameters throughout construction, testing and operation. All components must comply with the Book of Technical Specifications Chapter 9.04 and client installation/interface requirements, be delivered with calibration certificates and installed per manufacturer and project-specific procedures. The contractor will also provide installation studies and execution drawings for temporary/erection and permanent/operational phases, Material Approval Forms, Inspection and Test Plans, Quality Release Certificates, Lifetime Quality Records, and periodic data collection and analysis files at the frequencies specified for construction and operation (monthly/bi-monthly during construction; weekly/daily during key phases; and as specified during operation).