Oldbury Nuclear Power Station

Case Study Overview

Red7Marine installed replacement Active Effluent Discharge Lines at Oldbury power station as part of the stations care and maintenance works. Red7Marine’s previous project experience on similar projects at Bradwell and Sizewell nuclear power stations, positioned the company as the marine partner for Magnox to provide a turnkey solution.

At a glance

Location: Oldbury Nuclear Power Station, South Gloucestershire
Plant used: Haven Seajack – 100t jack up barge
What we did: Red7Marine installed replacement Active Effluent Discharge Lines at Oldbury power station as part of the stations care and maintenance works.

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The Challenge

During the project, Red7Marine consulted and liaised closely with Magnox to provide an extensive project management team and assisted with marine consultancy. To carry out the operations, several items of bespoke plant were required including the fabrication of winches and frames mounted on the Haven Seajack to pull the pipes through the existing outfall. Specialist temporary works were also designed and fabricated in-house to avoid exceeding the minimum bend radius of the HDPE pipe during installation. The reels of HDPE pipe were welded onsite and carefully winched from the jack up barge, through the existing outfall to the discharge culvert before being fitted to the discharge valve.

Specialist temporary works were also designed and fabricated in-house to avoid exceeding the minimum bend radius of the HDPE pipe during installation. The reels of HDPE pipe were welded onsite and carefully winched from the jack up barge, through the existing outfall to the discharge culvert before being fitted to the discharge valve.

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The Solution

The Red7Marine team worked both inside and outside of the nuclear facility, making close liaison and the on-going communication with the client imperative. It was also paramount that very high standards of safety and environmental awareness were maintained at all times. Red7Marine incorporated their safe systems of work into the client’s systems using a collaborative approach.

Nick Offord, Managing Director at Red7Marine commented: “The combination of Red7Marine’s experienced delivery team with the marine construction and consultancy expertise makes installations possible in even the most challenging of conditions. This project demonstrates the proficiency Red7Marine has operating in the energy sectors.”

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Custom engineering

Red7Marine designed and fabricated many pieces of bespoke plant used during this project. The winches and frames that were mounted on the Haven Seajack jack up barge were uniquely designed and the team also fabricated HDPE pipes to ensure they did not exceed the minimum bend radius.

Technical support

The River Severn has extremely strong currents and a 14m tidal rise and fall which required detailed passage planning for the onsite vessels. Red7Marine carried out the site testing of the final installation to certify that the pipelines were operational.