The Nuclear Power Station of South Rathmor
In 1954, as Britain entered the nuclear age, the government sought a remote yet secure site for a new type of power station.
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The Nuclear Power Station of South Rathmor
In 1954, as Britain entered the nuclear age, the government sought a remote yet secure site for a new type of power station. Rathmor, with its windswept southern headland and proximity to Ministry of Defence training lands near Falachfaen, was chosen. Construction began soon after, aided by a newly built railway extension that carried in heavy machinery, steel, and concrete. For nearly four decades, the Rathmor Nuclear Power Station stood as both a symbol of modern ambition and a point of pride for the islanders, who saw their homeland at the forefront of technological progress.
Nuclear Flask on the G&R
The station’s design was innovative for its time. Alongside its reactors, it incorporated a pioneering system of pumped-storage hydro-electricity. During the night, when demand was low, surplus power was used to pump water uphill into the nearby Bodmin Reservoir, created when the Bodmin Dam was constructed nearly twenty years earlier. By day, at times of peak demand, the stored water was released back down through turbines, generating additional electricity exactly when it was needed. This clever system made Rathmor’s station one of the most efficient in the country, balancing the unpredictability of power use with the constancy of nuclear output.
Folklore, as ever on the islands, clung even to this modern marvel. Locals whispered of “the humming cliffs,” where the sound of turbines mingled with the sea wind, and of strange lights over the reactor domes on stormy nights. To some, the station was a beacon of progress; to others, an unsettling presence amid an ancient landscape.
By the late 1990s, after nearly forty years of service, the station was decommissioned as newer technologies replaced it. Today, the domes and chimneys stand silent, fenced and weathered, while the reservoir nearby remains active, still used in the island’s hydro-electric network. There has been talk of ‘Rathmor B’, based on a newer design, but so far no decision has been finalised. For now the site remains quiet, while whispering tales of Cold War ambition, of engineering ingenuity, and of an island that carried both tradition and modernity in its stride.
Rathmor Nuclear Power Station
Rathmor ‘A’, under construction – 1954
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About
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The Nuclear Power Station of South Rathmor
Located on a remote headland on southern Rathmor
