LOS ANGELES (AP) - The era of nuclear power in California might be fading away.

LOS ANGELES (AP) The era of nuclear power in California might be fading away.

Six years ago, the company that owns the state's last nuclear power plant announced it would seek renewed authority to keep the Diablo Canyon reactors running to nearly midcentury.

But a key step is on hold: Pacific Gas and Electric Co. says it's evaluating whether to meet a tangle of potentially costly state environmental requirements needed to obtain extended federal operating licenses.

If the company doesn't move forward, its current licenses would expire within a decade, meaning the plant would shut down.

Issues in play range from a long-running debate over the potential threat from earthquakes to the possibility PG&E might be ordered by regulators to spend billions of dollars to replace its cooling system because it kills fish.