/// Clean Water Networks

Dungeness Potable Water Supply

Client: Magnox
Value: £300k
Project start: February 2013
Project finish: July 2013
Location: Romney Marshes, Kent

Potable water supply for decommissioning, kiosks & builders work

Undertakings:

J Browne Construction carried out their first project on a nuclear reactor site at Dungeness Power Station in Kent. The reactor site closed several years ago but J Browne were tasked with installing a new clean water infrastructure network as part of ongoing decommissioning works.

The works comprised of the installation of a 125mm ring main within the old reactor buildings 1 and 2. The majority of the pipework was suspended on high level brackets throughout the building with work carried out by rope access.

J Browne also installed a new 80,000 litre water storage tank with connection off of the existing network supply main into the site. This included a large kiosk which housed booster pumps, electrical distribution boards and accumulator vessels which boosted the water pressure around the new installation to the required pressure.

The pipework outside of the reactors was buried in existing service troughs.

Project manager Duncan Groombridge said: “Working in a nuclear environment presents an unusual set of challenges. There were different control measures we had to meet including checking for levels of radiation in the ground before commencing drilling works.”

Other works undertaken included:

Service connections, taking the new supply to the existing service points and upgrading the water supply pipe to the sewage treatment works from a 32mm diameter galvanised iron pipe to a 50mm MDPE pipe to increase pressure flow.

Dungeness Potable Water Supply

Dungeness Potable Water Supply

The redundant nuclear reactors will remain at Dungeness for most of this century and the newly installed infrastructure will provide a safe water supply for many years to come.
The project was carried out with no lost time or non lost time incidents and the clients said the following:

“I have only been involved with the Towns Mains Diversion Project at Dungeness for the past two weeks. However, I have been involved with many different projects in the past, and have worked with many contractors of various disciplines. So, I am not without some experience.

I would like to highly commend Pat and James Tees, and also Martin Daly, for playing their part. They have worked steadily and safely all the time I’ve been with them, at the same time making excellent progress with the work. There has been no complaining or arguing – as is quite often the case with people who don’t understand the complexities of working within the nuclear-regulated industry, and they reported to me at the start and at the end of every single day, complete with updates and work planned. They worked tidily and methodically, bringing to my immediate attention anything of concern, and making sure that their working areas were in an excellent state of housekeeping.

They are a credit to your company, so please pass on my thanks for their professionalism and working ethics, and can I ask you to forward this email to those of a higher authority within the company, i.e. managers, directors, etc.” - Merfyn James, Magnox Projects Site Engineer.

 

/// Case Study

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