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America’s utilities prepare for a nuclear threat to the grid

America’s utilities prepare for a nuclear threat to the grid

Finance
WHEN North Korea said on September 3rd that it had developed a hydrogen bomb, adding that it could be used for a “super-powerful” high-altitude electromagnetic pulse (HEMP) attack, America’s electricity industry was already on alert. Sceptics tend to dismiss as far-fetched the idea that the rogue regime would knock out the electricity grid by detonating a nuclear bomb high in the atmosphere. Regulators have not mandated safety measures. But the utilities are taking it seriously enough.They are more than a year into a three-year programme, funded by about 60 electricity firms, to understand the potential impact of a HEMP attack on the generation and transmission of electricity, and to find ways to shield the network. Such concerns are not new. In 1962, when America exploded nuclear devices