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.
The Challenge
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.
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.”
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.
Complete package delivery
Red7Marine provided the equipment, labour and management for the installation of the HDPE pipes within the existing cooling water outfall.
SEE RELATED CASE STUDIES
Westminster Pier Extension
The Westminster Pier Extension allows more frequent River Bus services between Woolwich and North Greenwich to Westminster. The extension is a key part of the River Action Plan to improve TfL’s piers and increase capacity for passengers before 2020. Red7Marine designed and built a custom pile gate for the project. The barge was reviewed to support a 180t crawler crane for piling operations and was then further reviewed with an additional RH28 drill rig on board.
Brighton Marina
Phase 2
In order to accommodate a new luxury apartment block in Brighton, part of the marina needed to be reclaimed using sheet piled cofferdams. This would enable the water to be kept out and foundations to be built for the stunning seafront properties. Red7Marine supported the installation of a sheet pile twin wall cofferdam.
Emirates Cable Car
The Emirates cable car was installed to provide a pedestrian link across the River Thames between the Royal Docks and the Greenwich peninsula. Red7Marine worked with Bachy Soletanche in a joint venture to install the foundations for the one-kilometre long cable car using marine rotary bored piling.
Battersea River Pier
Red7Marine secured a contract at Battersea in December 2016 to install new tubular driven steel mooring piles for the Battersea Power Station river bus pontoon installation which is planned to be operational in Autumn 2017. Transport for London (TFL) decided to extend the river bus service after the number of housing developments at Battersea began to increase.
Middleton Sands Navigation Marker
This fast turn-around marine construction project involved the installation of a new tubular steel navigation marker pile at Middleton Sands, Barrow-in-Furness in 2017. The navigation marker was required to identify the sub surface obstructions and enable other vessels in the area to operate safely.
Liverpool 2 Deep Water Port Extension
Red7Marine was the marine partner of choice for BAM Nuttall when they constructed a piled combi-wall as part of the Liverpool 2 Dock Expansion that began in 2014. The construction of the container terminal was supported by four of Red7Marine’s jack up barges; the Haven Seariser 1, Haven Seariser 2 and the Haven Seariser 3 and the Haven Seajack as it carried out rock socket piling works.
Weston-Super-Mare
The Red7Marine team was chosen to provide specialist marine plant and personnel to aid the redevelopment of the Weston-super-Mare Grand Pier after it was destroyed in a fire in 2008. Red7Marine supplied the Haven Seajack 4 assisted in the pier construction works. Its previous experience in pier and marina construction works made it the ideal project partner for this development.
Bradwell Power Station Barrier Wall Removal
Red7Marine is a leading provider of equipment for marine demolition and is skilled in dismantling structures that are beyond the reach of ordinary demolition contractors. In 2012, Red7Marine removed approximately 800 tonnes of steel in the Blackwater Estuary from the Bradwell nuclear power station water intake structure.
Fingringhoe Firing Ranges
Red7Marine installed scour protection and provided remediation on damaged sections of the flood defences to preserve areas of the salt marsh at the Fingringhoe firing ranges in Essex. Scour protection and remediation techniques are used to control erosion in both estuarine and the offshore environments.
