ARM, which claims to be one of the UK's leading natural waste water treatment specialists, has been brought in to help with the decommissioning process at the Hunterston A site on the west coast of Scotland.
The Staffordshire-based firm, one of the top reed bed design and construction companies in Europe, has been drafted in to provide reed beds to treat sewage and waste water.
British Nuclear Group is responsible for the safe decommissioning of the site, near Largs in Ayrshire. In a contract worth nearly £100,000 ARM will provide the means of safely and efficiently treating sewage waste.
Hunterston A, opened on September 22, 1964 by the Queen Mother, comprised of two magnox-fuelled, graphitemoderated steel pressure vessel reactors.
Six 60 megawatt turbo alternators provided electricity to the grid.
ARM commercial manager Tori Widdas said they were pleased to be involved in such an important project.
"There will be contractors on the site for a substantial period of time, so it is important to install a waste water treatment process which is effective, while at the same time having as little impact as possible on the environment," she said.