Things I don’t understand ||

I note this article by Lawrence Solomon only because I, like most people, assumed that if we in Western countries were as nuclear-powered as France, then most of our problems with power generation would be solved (and if you think that carbon emission is a problem, that as well).

But I was wrong. Dead wrong.

“If France can produce 80% of its electricity with nuclear power, why can’t we?,” asks U.S. presidential candidate John McCain. Nuclear power is a cornerstone of Senator McCain’s plan to combat climate change, which he is unveiling this week.

McCain thinks he is asking a simple rhetorical question. As it turns out, he is not. His question is technical, with an answer that will surprise him and most Americans. Nuclear reactors cannot possibly meet 80% of America’s power needs — or those of any country whose power market dominates its region — because of limitations in nuclear technology. McCain needs to find another miracle energy solution, or abandon his vow to drastically cut back carbon dioxide emissions.

Unlike other forms of power generation, nuclear reactors are designed to run flat-out, 24/7 — they can’t crank up their output at times of high demand or ease up when demand slows. This limitation generally consigns nuclear power to meeting a power system’s minimum power needs — the amount of power needed in the dead of night, when most industry and most people are asleep, and the value of power is low. At other times of the day and night, when power demands rise and the price of power is high, society calls on the more flexible forms of generation — coal, gas, oil and hydro-electricity among them — to meet its additional higher-value needs.

If a country produces more nuclear power than it needs in the dead of night, it must export that low-value, off-peak power. This is what France does. It sells its nuclear surplus to its European Union neighbours, a market of 700 million people. That large market — more than 10 times France’s population — is able to soak up most of France’s surplus off-peak power.
The U.S. is not surrounded, as is France, by far more populous neighbours. Just the opposite: The U.S. dominates the North American market. If 80% of U.S. needs were met by nuclear reactors, as Senator McCain desires, America’s off-peak surplus would have no market, even if the power were given away. Countries highly reliant on nuclear power, in effect, are in turn reliant on having large non-nuclear-reliant countries as neighbours. If France’s neighbours had power systems dominated by nuclear power, they too would be trying to export off-peak power and France would have no one to whom it could offload its surplus power. In fact, even with the mammoth EU market to tap into, France must shut down some of its reactors some weekends because no one can use its surplus. In effect, France can’t even give the stuff away.

Not only does France export vast quantities of its low-value power (it is the EU’s biggest exporter by far), France meanwhile must import high-value peak power from its neighbours. This arrangement is so financially ruinous that France in 2006 decided to resurrect its obsolete oil-fired power stations, one of which dates back to 1968.

Now read on