Powering Space; Radical Oppositions

Engineers at NASA’s Kennedy Space Center installed a nuclear power source Thursday onto the Mars rover set to launch this month. The rover, named Curiosity, is the latest in unmanned missions to Mars, and is expected to provide new evidence about Mars history, including clues as to whether the Red Planet ever harbored life.

Worth a read. This bit gave us an evil tingle:

The nuclear source is also less affected by weather and daylight conditions on Mars, factors that have hampered previous missions, as when the twin Mars Exploration Rovers encountered dust storms that covered their solar panels while operating on Mars from 2004 to 2011.

---

The New York Time’s Green blog tries some pushback on Curiosity:

One alternative is to develop a better way to convert heat into electricity in space. The National Academy report said that the method NASA uses now is only about 6 percent efficient. A Stirling Engine system could produce five times as much electricity from each unit of heat, reducing the need for plutonium, but it has many moving parts and has not been adapted to space use.

But the response so far has been to use solar cells whenever possible. Steven W. Squyres, a professor of astronomy at Cornell who is the chief scientist for the Opportunity and Spirit rovers, said: “You always use solar when you can; it’s simpler, cheaper, just easier to do. You only use nuclear when you have to.’’

And one of those instances where you have to use nuclear is in Curiosity, because it is heavy (as in, one ton heavy) and equipment-packed and needs considerably more electricity to operate than its smaller predecessors – more than solar power can generate. (Plus there are those dust issues.) It almost feels like the pro-con debates that solar and nuclear advocates have on terra firma transferred to the depth of space.

But, well, earlier probes like Spirit and Opportunity performed well enough on solar energy and I expect Curiosity will be fine with nuclear energy (actually, the heat from plutonium-238 will be directly converted to electricity). Everybody gets a chance to shine.

---

Agence Presse-France has an interesting enough article about protests against used nuclear fuel from Germany being carted over to France. We’ve covered that before here and there isn’t a lot new in the article, but this caught my eye:

France produces a higher proportion of its power in reactors than any other country in the world, and its electricity bills are around 25 percent cheaper than in its neighbors, a boon to industry.

“A boon to industry?” Well, probably so, but it seems odd to leave out “a boon to every user of electricity in France.”

---

From the same article:

"Beyond the danger that this waste poses, we're demonstrating our radical opposition to a means of production that means we'll always need more power. We're against endless growth," said 24-year-old Anna, from Paris.

Okay. Efficiency fan, I guess.

---

See, if you don’t give your annoying relatives the power to annoy you, then you won’t be annoyed by them. You can eat as much as you want, zone out in front of the TV in grandma’s comfiest chair, play games with your little nephews and nieces (which almost always involve their bouncing off your stomach somehow), bicker with your old Republican cousin on how Stevenson was robbed in the ‘56 elections, and dream of all those sales you’ll want to avoid on Friday. And be happy. And give thanks.

Curiosity on the left, Spirit on the right.

Activists' Claims Distort Facts about Advanced Reactor Design

Below is from our rapid response team . Yesterday, regional anti-nuclear organizations asked federal nuclear energy regulators to launch an investigation into what it claims are “newly identified flaws” in Westinghouse’s advanced reactor design, the AP1000. During a teleconference releasing a report on the subject, participants urged the Nuclear Regulatory Commission to suspend license reviews of proposed AP1000 reactors. In its news release, even the groups making these allegations provide conflicting information on its findings. In one instance, the groups cite “dozens of corrosion holes” at reactor vessels and in another says that eight holes have been documented. In all cases, there is another containment mechanism that would provide a barrier to radiation release. Below, we examine why these claims are unwarranted and why the AP1000 design certification process should continue as designated by the NRC. Myth: In the AP1000 reactor design, the gap between the shield bu...

How many nuclear plants does it take to meet the world's energy needs?

Several weeks ago Joshua Pearce at Clarion University in Pennsylvania released a study titled “ Thermodynamic limitations to nuclear energy deployment as a greenhouse gas mitigation technology .” In the study he stated... nuclear energy production would have to increase by 10.5% per year from 2010 to 2050 to both replace fossil-fuel-energy use and meet the future energy demands. This line, of course, made the headlines and has been picked up by several outlets and blogs . When looking into his calculations for this statement, he made one assumption error that overstated the above sentence by nearly a factor of three. Page 121, Section 4.1 of the study states: Richard Smalley pointed out that in 2004, the global economy consumed the equivalent of 220 million barrels of oil per day, which converted into electricity terms is the equivalent of 14.5 TeraWatts (TW), or 14,500,000 MegaWatts (MW) (2005). … With a nuclear plant having about 1000 MW (1 GW) of capacity, we would need 14,500...

What Happens During a Refueling Outage?

You may have noticed over the past few weeks that a number of nuclear plants are shut down for refueling outages or are resuming operations after just returning from one. This type of routine outage usually occurs in the spring or fall when electricity demand is low so that nuclear reactors can replace about one-third of the spent fuel rods with new fuel and conduct other routine maintenance and repairs at the plant. To get a better sense of how refueling works at a nuclear energy facility, I spoke with Marcus Nichol, NEI’s senior project manager for used fuel storage and transportation, and asked him to explain the basics. Why does a nuclear plant need to replace one-third of its fuel? Nichol: The main purpose of a refueling outage is to replace older fuel that is depleted—meaning it can no longer efficiently produce energy from nuclear fission reactions—with new fuel. This “used fuel” has typically been used in the reactor for four-and-a-half to six years before it is pe...

NEI Nuclear Notes

Search This Blog