The Board of the Omaha Public Power District confirmed the promised closure of its Ft. Calhoun nuclear plant in a unanimous vote today.  Ft. Calhoun will close by the end of the year. OPPD President and Chief Executive, Tim Burke, articulated what is becoming rapidly more apparent industry-wide: the costly nuclear plant cannot compete with cheaper sources of electricity.  These days, that source is rapidly becoming wind power.  "This is simply an economic decision. The economics have been going so fast the other way that we can’t seem to justify this anymore,” said 30-year board member John Green. But the financial headaches are far from over.  Once shuttered, the plant must be decommissioned, a process that it is estimated will take 35 years and cost at least $1 billion.  More