I was around before they had commercial nuclear power. I remember the selling points. Absolutely fail safe. Electricity so cheap it would not be metered. And plentiful power. Only the last turned out to be true. Nuclear is very expensive power. And it is a point source, easily shut down either at the point of generation, or somewhere in the transmission. The alternatives are less costly, and closer to the places where the electricity is used. Nuclear has a place in the mix, but it is not viable as the sole source of our power.
I worked at the first commercial nuclear station so I know what you say is true. The thing that killed nuclear was Three Mile Island. It stopped new construction and cost the utilities, consumers, a boat load of money. After TM the cost of nuclear went through the roof.
As for cost you are correct:
| Table 8.4. Average Power Plant Operating Expenses for Major U.S. Investor-Owned Electric Utilities, 2002 through 2012 (Mills per Kilowatthour) |
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| Operation | Maintenance | | | | | | | |
|---|
| Year | Nuclear | Fossil Steam | Hydro-electric | Gas Turbine and Small Scale | Nuclear | Fossil Steam | Hydro-electric | Gas Turbine and Small Scale |
|---|
| 2002 | 9.00 | 2.59 | 3.71 | 3.26 | 5.04 | 2.67 | 2.62 | 2.38 |
| 2003 | 9.12 | 2.74 | 3.47 | 3.50 | 5.23 | 2.72 | 2.32 | 2.26 |
| 2004 | 8.97 | 3.13 | 3.83 | 4.27 | 5.38 | 2.96 | 2.76 | 2.14 |
| 2005 | 8.26 | 3.21 | 3.95 | 3.69 | 5.27 | 2.98 | 2.73 | 1.89 |
| 2006 | 9.03 | 3.57 | 3.76 | 3.51 | 5.69 | 3.19 | 2.70 | 2.16 |
| 2007 | 9.54 | 3.63 | 5.44 | 3.26 | 5.79 | 3.37 | 3.87 | 2.42 |
| 2008 | 9.89 | 3.72 | 5.78 | 3.77 | 6.20 | 3.59 | 3.89 | 2.72 |
| 2009 | 10.00 | 4.23 | 4.88 | 3.05 | 6.34 | 3.96 | 3.50 | 2.58 |
| 2010 | 10.50 | 4.04 | 5.33 | 2.79 | 6.80 | 3.99 | 3.81 | 2.73 |
| 2011 | 10.89 | 4.02 | 5.13 | 2.81 | 6.80 | 3.99 | 3.74 | 2.93 |
| 2012 | 11.60 | 3.73 | 6.71 | 2.46 | 6.80 | 3.99 | 4.63 | 2.76 |
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SAS Output
Not sure about your "point source" comment. Close to where I live there is a nuclear station and a coal station right next to each other. They would both be "point sources." Never the less both could be shut down at the source regardless of location.
As for reliability, doing a google I came up with these numbers from a UK site:
wind farms have an assumed availability at peak of 10%
Solar power is an intermittent energy source.
hydroelectric power stations have an assumed availability at peak of 60%.
nuclear power stations have an assumed availability at peak of 75%.
gas-fired power stations have an assumed availability at peak of 90%
coal-fired power stations have an assumed availability at peak of 90%.
oil-fired power stations have an assumed availability at peak of 80%.
So it seems that one of the cheapest most reliable sources is what we are shutting down. Nuclear is good and reliable with an output that is very predictable. One of the major metrics in measuring nuclear performance is on line time. Which really is the only way nuclear is viable. Short outages and nice long on line times.