Emergency declared after fire at Savannah River nuclear laboratory in South Carolina

An emergency was declared at the Savannah River National Laboratory in South Carolina after a fire broke out at the site on Wednesday evening. Officials said the incident prompted a Site Area Emergency at 5:39 pm local time, before the blaze was extinguished later the same night. The emergency was lifted at 9:45 pm after checks found no detectable radioactive contamination.

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A spokesperson for the US Department of Energy said one employee was taken to hospital with minor injuries. Officials also said there was no radiological contamination reported, and protective measures were lifted once the situation was brought under control. Barricades that had been put in place around the site were reopened, and workers were told to resume normal duties according to schedule.

The Savannah River Site is a major part of the United States nuclear weapons complex and has supported the country's strategic deterrence programme for more than 75 years. The facility manages nuclear materials and radioactive waste, and clean-up operations there are intended to protect the surrounding environment. It was built in the 1950s, when five reactors were constructed to produce materials used in nuclear weapons, mainly tritium and plutonium-239.

The fire and emergency response underline the sensitivity of incidents at nuclear-related facilities, even when no contamination is detected. The site is described by the Department of Energy as a key part of national security infrastructure, with worker, public and environmental safety treated as priorities. Temporary restrictions were also placed on rail, river and air traffic near the site while the response was under way.

Officials notified state and local authorities during the incident, and residents were advised to monitor local radio and television for updates. Highway 125 remained open, and traffic at the site entrances later returned to normal. Staff who had been told to shelter in place were also given the all-clear to resume normal duties.

What remains unclear is what caused the fire and whether any further review will follow. The available information indicates the emergency was contained within hours and that operations were restored the same night. The next developments to watch are any official findings on the cause of the blaze and whether the laboratory or the wider Savannah River Site announces additional safety measures.

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