In reply to Nukespud:
Mostly economics and regulatory delay.
Economics:
Recession...need for new power is deferred
Cost of Money ...lack of load growth causes WS to not want to loan money
Costs: Costly construction makes it impossible to predict costs....recent construction schedules are totally unrealistic due to lack of experience on the part of those formulating the schedules.
Analysis Paralyysis: So many wild cards makes it difficult to commit...and experience shows that a nuke plant that goes bad ends careeers.
Regulatory Delay: the intervenors have help craft a licensing scheme that is absurd. License a plant that has not been designed. Push all unknowns into the future and hope that they do not come back to bite you. Pay the NRC $250/hr to review license submittals. No incentive to do reviews in a timely manner. If you paid me $250/hr to review submittals I would find so many questions that you would run out of money before I was finished.
One stop licensing allows utilities to tip toe into the stream but not really commit. And Washington has trained everyone to expect a bailout with fiat money. Economy has been destroyed so large capital projects are very difficult to move forward.
Those that have actually built, operated, refueled, and otherwise supported large projects such as a nuclear power plant are few and far between...and many are leaving the work force. No one ot fly the plane except some raw recruits...not the way to win a war as Germany found out when all the aces were killed and green recruits were thrown into fighters to be shot down by more experienced allied pilots.
AND FINALLY when natural gas is at $3/MBTU...hard to justify nuke plants when cheapo combined cycle plants can be built in a few years with no real risk. Packer technology has unlocked huge amounts of natural gas and this developement may stall nuclear plant development.