Category Archives: Energy

The Risk of Radiation Dosage, Illustrated

xkcd has a dry wit and usually a good sense of how to fit humor with technology. The radiation dose chart on the site is a great idea but it lacks cartooning and jokes. Is that because of sensitivity, fear and feelings associated with radiation exposure?

He points out, for example, that a CRT over one year will expose you to more radiation than an x-ray of your arm. Maybe I should put that the other way around. It’s kind of funny.

The giant green box area on the right side of his chart is the maximum annual dose allowed a radiation worker, while the itty bitty green box to the left of it is the maximum external dose from Three Mile Island. Wow, assuming his boxes are accurate, good illustration on risk.

xkcd Radiation Dose Chart

The BBC offers a more dramatic version. They list the levels in numeric format, but the chart gives a very “red” heavy impression of exposure. I noted in their chart that the annual dose level allowed a radiation worker has been reduced by more than half. This suggests that these charts are not an accurate representation of known risk — they are an estimation still subject to change.

Radiation Dose Level Risk

Of course photos of radiation victims probably have the most profound effect on our risk thermostat, as they tend to give us a sense of accurate representation (7 million affected by Chernobyl fallout, half of them children instead of just the 50 officially recorded).

Recovery Funds Speed Nuclear Cleanup

The Department of Energy reports that the cleanup of nuclear waste in South Carolina is moving ahead and creating hundreds of jobs with the help of Federal Recovery Funds. It is a little more than half complete today.

Recovery funds are accelerating the cleanup of contaminated facilities, soil, and ground water at one of the nation’s key nuclear weapons sites.

During the early 1950s, the Savannah River Site (SRS) produced tritium and plutonium-239 to be used in the manufacture of nuclear weapons.

[…]

Since the 1990s, the Department of Energy (DOE) has been working to clean up contamination on the 310-square-mile site in South Carolina. Recovery funds totaling $1.6 billion are allowing DOE to accelerate these clean-up efforts. DOE says the Recovery funds — from six separate awards — will reduce the SRS footprint by 75 percent by 2012, seven years earlier than previously planned.

It is amazing how large of an area is contaminated or otherwise impacted by these nuclear facilities — 310-square-miles!

Just one segment of the project, which already is completed, had 23 buildings spread over 40-square-miles. Quick trivia check: 40-square-miles is the same as 25,000 acres and…

  1. Twice the area of Manhattan, NY
  2. The same area targeted in the 2003 hunt for Osama bin Laden
  3. The same area as Walt Disney World Resort
  4. The same area as the vacant, abandoned lots in Detroit, MI
  5. All of the above

Imagine if $1.6 billion was earmarked by the federal government for the same 310-square-miles to fund innovation and production instead of just reclamation (making the area usable again). Although innovation and jobs for reclamation are notable, this is a good example of the back-end costs that are sunk into fixing pollution.

GE Mark 1 Reactor Safety Design and Fukushima

Robert Reich brings up whether GE was cutting corners with security controls within the Mark 1 Reactor, but he does not address why and how regulators failed to stop a 90% failure calculation from widespread adoption. Did they accept compensating controls? Liability offset? Low probability of melt?

The New York Times reports that G.E. marketed the Mark 1 boiling water reactors, used in TEPCO’s Fukushima Daiichi plant, as cheaper to build than other reactors because they used a comparatively smaller and less expensive containment structure.

Yet American safety officials have long thought the smaller design more vulnerable to explosion and rupture in emergencies than competing designs. (By the way, the same design is used in 23 American nuclear reactors at 16 plants.)

In the mid-1980s, Harold Denton, then an official with the Nuclear Regulatory Commission, said Mark 1 reactors had a 90 percent probability of bursting should the fuel rods overheat and melt in an accident. A follow-up report from a study group convened by the Commission concluded that “Mark 1 failure within the first few hours following core melt would appear rather likely.”

Germany Shuts Down Almost 1/2 of its Nuclear Reactors

Deutsche Welle has had the best coverage I have seen anywhere of the nuclear disaster unfolding in Japan. The interview with analysis of Chernobyl and Three Mile Island, for example, was extremely useful to understand the various risks in different reactors.

They have now announced that Germany is shutting down its older nuclear reactors until an updated security analysis can be completed.

Chancellor Angela Merkel announced Tuesday that seven of Germany’s 17 nuclear power stations would be shut down, at least until the end of a three-month moratorium on the extension of the lifespans of Germany’s nuclear stations.

The decision was made as a direct result of the nuclear disaster currently unfolding at the Fukushima nuclear power plant in Japan.

Merkel is banking on the fact that Japan has brought new risk calculation data to light. Her opposition is not buying it. They accuse her of ignoring the risk before the disaster.

Sigmar Gabriel, head of the Social Democratic Party (SPD) was withering on Merkel’s new plan: “She claimed then that all safety concerns in German nuclear power stations had been cleared up, and she claimed we needed nuclear power in Germany. Now we know that none of that was true.”

With 80% of Germans now said to oppose nuclear energy, it could just be a wise political move but it is still good to see infrastructure security receive serious attention.

The effect of Japan’s unfolding nuclear catastrophe on Germans could not be clearer. After the protests in Baden-Württemberg on Saturday, an estimated 110,000 people demonstrated in 450 German towns on Monday against the extension of nuclear power.

Only 110,000 people? That’s the same size as the growing protests against the Regressive Governor in Madison, Wisconsin.

Up to 100,000 people protested at the Wisconsin state Capitol on Saturday against a new law curbing the union rights of public workers that is seen as one of the biggest challenges in decades facing U.S. organized labor.

Wow, perspective. More Americans are protesting in Wisconsin today than during the Vietnam war; about the same as the number protesting today’s nuclear crisis in Germany.