Proposed nuclear reactors to cost up to $13 billion

CPS Energy officials want to build the $10 billion to $13 billion reactors at the South Texas Project outside Bay City, saying its the most cost effective way to get additional power. CPS Energy owns 40 percent of the project. New Jersey-based NRG Energy owns the remaining portion, and the utilities would split the cost.

San Antonio ratepayers would be hit with a 5 percent rate increase every other year for the next decade to pay for the expansion, officials said Monday. But that rate projection assumes CPS can sell excess power to other utilities, something critics are wary of.

"We believe the long-term lowest price option is nuclear," said Steve Bartley, CPS interim general manager. "Even if we decide not to move forward, we will have a need for bill increases over the next 10 years."

Business groups have supported the nuclear expansion, but others have warned that the project could easily suffer from cost overruns.

"My confidence level about the $13 billion figure is about a 6 or a 7 on a scale of 1 to 10," said City Councilman John Clamp. "That amount can only go up. We need to do some more risk analysis."

The City Council would need to agree to issue bonds to help fund the construction. If approved, building wouldn't likely start until at least 2012, when the Nuclear Regulatory Commission is expected to grant a license for the expansion.