The Tennessee Valley Authority is debating whether to restart construction on the Bellefonte nuclear plant in Alabama. Doing so could cost about $5 billion to make the plant operational by 2020. The Southern Alliance for Clean Energy is concerned because of reports that the plant's concrete, poured in the 1970s, is cracking. "You can always replace a pipe or you can always replace a wire, but concrete is degrading, and this concrete's got a 50-year head start before the plant ever starts to operate," explains Arnold Gundersen, a nuclear engineer.
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