---
title: "Sizewell C - HR Monitoring (CRX & Building) Package"
ocid: "ocds-b5fd17-fef0fc6a-e18e-4e8d-a410-788d1080f1f6"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-b5fd17-fef0fc6a-e18e-4e8d-a410-788d1080f1f6"
markdown_url: "https://d3tenders.com/contract/ocds-b5fd17-fef0fc6a-e18e-4e8d-a410-788d1080f1f6.md"
json_url: "https://d3tenders.com/contract/ocds-b5fd17-fef0fc6a-e18e-4e8d-a410-788d1080f1f6.json"
source: "Contracts Finder"
current_stage: "Tender"
buyer: "SIZEWELL C LIMITED"
published: "2026-03-27"
---

# Sizewell C - HR Monitoring (CRX & Building) Package

Buyer: SIZEWELL C LIMITED  
Current stage: Tender  
OCID: ocds-b5fd17-fef0fc6a-e18e-4e8d-a410-788d1080f1f6

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## Summary

Sizewell C Limited is inviting tenders for the HR Monitoring Package focusing on Sizewell C's CRX and Nuclear Island Building. This contract entails the supply and installation of a comprehensive EAU monitoring system to ascertain the mechanical integrity and environmental parameters of the Reactor Building. The procurement falls under the 'works' category with a focus on civil engineering consultancy services, alongside several other engineering-related classifications. The tendering stage began on 27 March 2026, with a deadline for submissions on 10 April 2026. The project will require delivery to multiple locations including the UK, Europe, Channel Islands, and beyond, with the contract period spanning from 30 October 2028 to 4 March 2030.

This procurement opportunity is particularly well-suited for SMEs specialising in engineering design, civil engineering, and technical inspection services. It offers a platform for businesses to demonstrate proficiency in innovative monitoring solutions, enabling them to contribute to a critical infrastructural project. With a potential contract value of up to £5 million, companies with expertise in delivering complex installation studies, material approvals, quality records, and efficient data collection systems will find this an attractive avenue for growth. This tender allows firms to showcase their capabilities in technical and environmental engineering services, potentially bolstering their position within the industry.

## Notice

Overview of Scope Supply and installation of the HR Monitoring System to the to CRX and Nuclear Island Building The EAU (containment monitoring) system is required to continuously monitor and assess the mechanical behaviour and integrity of the Reactor Building and integrity of the Reactor Building and associated at nuclear island at Sizewell C (SZC) throughout construction, testing, and operation. The system scope covers the design, supply, installation, commissioning, and documentation of: * Monitoring sensors (including extensometers, temperature probes, hydraulic levelling pots, pendulums, invar wires, inclinometers, hygrometers, and pressure sensors) * Associated cabling, connection/grouping boxes, and acquisition/data logger cabinets * All necessary software interfaces and data collection/reporting tools More than 200 sensors will be embedded and installed in both the inner containment wall and the common raft of the nuclear island. The EAU monitoring system must provide real-time and periodic data on: * Settlements and deformations of the nuclear island raft (topographical markers, hydraulic levelling pots, extensometers, and temperature sensors) * Overall containment distortions (pendulums and invar wires) * Localized deformations and tendon failure detection (embedded extensometers, local monitoring devices) * Tension in prestressed cables (dynamometers) * Environmental parameters (temperature, humidity, internal and external pressure) All EAU system components must comply with the Book of Technical Specifications (BTS) Chapter 9.04 and associated referenced as well as client installation and interface requirements. Instruments must be delivered with calibration certificates and installed in accordance with manufacturer and project-specific procedures. The EAU system contractor will also provide: * Installation studies and execution drawings for all phases (temporary/erection and permanent/operational) * Material Approval Forms, Inspection and Test Plans, Quality Release Certificates, and Lifetime Quality Records (LTQR) * Data collection, reporting formats, and periodic analysis files as required by the client (monthly/bi-monthly during construction; weekly/daily during key phases; and as specified during operation) Additional information: It will be beneficial for you to describe your business as much as possible and highlight where you can help us to achieve our values described above

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Contracts Finder |
| Latest notice | https://www.contractsfinder.service.gov.uk/Notice/5ec0fb87-1fe6-492f-9a9a-20cfb71fb2dc |
| Notice type | Tender Notice |
| Procurement type | Standard |
| Procurement category | Works |
| Procurement method | Not Specified |
| Procurement method details | Not specified |
| Tender suitability | SME |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 27 Mar 2026 |
| Submission deadline | 10 Apr 2026 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 30 Oct 2028 - 4 Mar 2030 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £5,000,000 |
| Lots value | Not specified |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Not specified |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SIZEWELL C LIMITED |
| Locality | LONDON |
| Post town | West London |
| Postcode | W1T 4EZ |
| Country | England |
| ITL 1 | TLI London |
| ITL 2 | TLI3 Inner London - West |
| ITL 3 | TLI36 Camden |
| Local authority | Camden |
| Electoral ward | Bloomsbury |
| Westminster constituency | Holborn and St Pancras |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 38 - Laboratory, optical and precision equipments (excl. glasses)
- 45 - Construction work
- 71 - Architectural, construction, engineering and inspection services
- 76 - Services related to the oil and gas industry

### Codes

- 38343000 - Error-monitoring equipment
- 38434400 - Vibration analysers
- 45220000 - Engineering works and construction works
- 71300000 - Engineering services
- 71310000 - Consultative engineering and construction services
- 71311000 - Civil engineering consultancy services
- 71311100 - Civil engineering support services
- 71312000 - Structural engineering consultancy services
- 71313000 - Environmental engineering consultancy services
- 71318000 - Advisory and consultative engineering services
- 71320000 - Engineering design services
- 71321000 - Engineering design services for mechanical and electrical installations for buildings
- 71322000 - Engineering design services for the construction of civil engineering works
- 71330000 - Miscellaneous engineering services
- 71332000 - Geotechnical engineering services
- 71335000 - Engineering studies
- 71336000 - Engineering support services
- 71340000 - Integrated engineering services
- 71350000 - Engineering-related scientific and technical services
- 71631400 - Technical inspection services of engineering structures
- 71700000 - Monitoring and control services
- 76536000 - Downhole vibration control services

## Release History

- 27 Mar 2026 at 10:30 - Tender - Tender Notice - https://www.contractsfinder.service.gov.uk/Notice/5ec0fb87-1fe6-492f-9a9a-20cfb71fb2dc

## Documents

- https://www.contractsfinder.service.gov.uk/Notice/5ec0fb87-1fe6-492f-9a9a-20cfb71fb2dc
  27th March 2026 - Opportunity notice on Contracts Finder
- https://www.competefor.com/business/viewOpportunityDetailsSupplier.html?id=108307235
  Please follow this link to view the notice.

## Provenance

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