Washington Post: Hopes for a nuclear revival, fanned by fears of global warming and a changing political climate in Washington, are running into new obstacles over a key element — money. A new approach for easing the cost of new multibillion-dollar reactors, which can take years to complete, has provoked a backlash from big-business customers unwilling to go along. Financing has always been one of the biggest obstacles to a renaissance of nuclear power. The plants are expensive, and …