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Nuclear energy isn’t a safe bet in a warming world–here’s why via The Conversation

The overwhelming majority of nuclear power stations active today entered service long before the science of climate change was well-established. Two in five nuclear plants operate on the coast and at least 100 have been built just a few metres above sea level. Nuclear energy is, quite literally, on the frontline of climate change – and not in a good way.

Recent scientific data indicates sea levels globally will rise further and faster than earlier predictions suggested. Even over the next couple of decades, as extreme weather events become more frequent and destructive, strong winds and low atmospheric pressure will drive bigger storm surges that could threaten coastal installations.

Nuclear power plants must draw from large sources of water to cool their reactors, hence why they’re often built near the sea. But nuclear plants further inland will face similar problems with flooding in a warming world. Higher water temperatures in lakes, and rivers and reservoirs would make it harder to keep reactors cool and avert meltdowns. Increasingly severe droughts and wildfire only ramp up the threat.

Around 516 million people worldwide live within a 50-mile (80km) radius of at least one operating nuclear power plant, and 20 million live within a ten-mile (16km) radius. These people bear the health and safety risks of any future nuclear accident. Efforts to build plants resistant to climate change will significantly increase the already considerable expense involved in building, operating and decommissioning nuclear plants, not to mention maintaining their stockpiles of nuclear waste.

Nuclear power is often credited with offering energy security in an increasingly turbulent world, but climate change will rewrite these old certainties. Extreme floods, droughts and storms which were once rare are becoming far more common, making industry protection measures, drafted in an earlier age, increasingly obsolete. Climate risks to nuclear power plants won’t be linear or predictable. As rising seas, storm surges and heavy rainfall erodes coastal and inland flood defences, natural and built barriers will reach their limits.

The US Nuclear Regulatory Commission concludes the vast majority of its nuclear sites were never designed to withstand the future climate impacts they face, and many have already experienced some flooding. A recent US Army War College report also states that nuclear power facilities are at high risk of temporary or permanent closure due to climate threats – with 60% of US nuclear capacity at risk from future sea-level rise, severe storms, and cooling water shortages.

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