Design of Control & Instrumentation systems for decommissioning sites:


  • Telephone exchange
  • Local Area Network
  • Telephone Infrastructure
  • Public Address
  • Trunk radio
  • Fire
  • Security
  • Alarms
  • Supervisory Control & Data Acquisition Instrumentation

We have recently completed C&I overlay projects for Magnox designing the interfaces to allow operation of these mission critical systems during the demolition phase and into Care & Maintenance.

The design intent was to review all equipment across a wide number of interfaces and provide a solution to allow demolition works to proceed whilst maintaining safe operational systems throughout the transfer phase and up to final handover for full implementation into the transition period.

The design included a robust fibre optic network with flexibility to allow simple changes throughout the life of the plant to be carried out as systems are removed from service.


The works included a full rework of the site SCADA and PLC systems utilising Wonderware Intouch and Siemens S7-1200 PLC's and replacement of all Rochester alarm requirements with the Omni 16's. Interfaces were provided to the existing plant Eurotherm 2500 hardware and a new interface was created to monitor and historically record the alarm handling for the Omniflex Omni16 alarm systems used site wide.

A non urgent alarm system was also introduced using S7-1200 PLC's and Intouch. In consideration of human factors the PLC/ SCADA non urgent alarm system was designed to mimic the hardwired Omniflex alarm operators interface enabling common sequences and alarm acknowledgment procedures.

All information for alarm handling is then displayed in runtime and historical formats on the SCADA system and historically recorded for life time records. The Omniflex facia status is also available in Intouch with SCADA windows mimicking the local display panels for remote plant monitoring.


Office Tel: 01728 831121

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Unit 6, Cullen Place

Eastlands Industrial Estate


IP16 4US