Showing posts with label cesium 137. Show all posts
Showing posts with label cesium 137. Show all posts

Sunday, April 17, 2016

The Anti-Nuclear Camp

The anti-nuclear zealots will go to any lengths to preserve the myth that "no level of radiation exposure is safe." Their tactic is often to use ridiculous anecdotes ("fish so radioactive they glowed in the dark") to incite fear in the technically ignorant.

More than twenty years ago, I was present when the minions of Dr. Benjamin Spock were "debating" representatives of Arkansas Power and Light. [Arkansas Power and Light was then owner of Arkansas Nuclear One - a complex with two 1,000 megawatt nuclear power plants.] It was a rout. Spock's activists had no idea of the reactor contents or of any way to begin quantifying the potential dangers of the plant. But they knew how to frame the debate: It was all about greedy industrialists intentionally endangering children, the elderly, the handicapped, the fishermen on the river, even birds flying over. Indeed, no one was safe from attack by this ruthless, rapacious cartel of profit mongers. Each accusation by Spock's forces brought forth wild cheers and applause.

The utility representatives were reduced to looking at each other with mouths wide open and eyes rolling. They came prepared to talk about containment building integrity and cesium 137 - but not about their war on the community. When anyone from the nuclear camp dared to open his mouth, it was to a chorus of boos and heckling.

When the bloodbath was over, the anti-nukes marched out of the meeting as a cheering horde; the physicists and engineers were still sitting in shock when I left. Attempts to use a logical technical argument with this anti-nuclear group reminded me of trying to teach a pig to sing: It frustrates you and annoys the pig.

Friday, February 5, 2016

Chernobyl - Symbol of Unconcerned Totalitarianism

One can hardly compare the Chernobyl fire in the Ukraine to the alleged "Three Mile Island disaster" in Harrisburg, Pennsylvania. Thirty-one firement and plant workers were killed in the former, while the only victims at TMI were from media-caused anxiety. Volumes have been written by analysts on the mistakes made a both power plants. But Chernobyl, with its graphite reactor designed to produce weapons-grade plutonium as well as electricity - and with no containment building - cannot even be compared with the pressurized water reactor (PWR) at TMI in which the nuclear reaction is stopped by the laws of physics when there is a loss of coolant water. Of course that hasn't stopped the anti-nuclear, anti-technologists from trying. But perhaps the strangest story out of Chernobyl was that the Soviet hierarchy, who had strongly supported the anti-nuclear activists in the United States, were apparently led to believe their own propaganda about radiation dangers.

The accident at Chernobyl provided both good and bad news for anti-nuclear activists. For decades, they had been attempting to come up with some reasonable way that radioactive products from nuclear power plants could be spread over the countryside. The best they'd been able to come up with for U.S. power plants went like this:

(a) A loss-of-coolant accident occurs, and the emergency core cooling systems fail to operate, leading to a meltdown of the fuel assemblies inside the reactor.

(b) Although the nuclear reaction stops when the coolant is lost (the water acts as a moderator to slow down the neutrons so they can be captured and allow the reaction to continue), there is still heat generated from the decay of the "daughters" of the reaction. This is supposedly so intense that it melts through six inches of steel in the reactor vessel, and continues through many feet of high-strength, reinforced concrete.

(c) But it can't stop there. The molten mass must then continue to melt through perhaps a few hundred feet of earth until reaching an aquifer. There the steam generated causes "blow holes" to develop, and the steam carries the radioactive products back to the surface. (Hold on, we're almost there.)

(d) The weather must cooperate with a gentle breeze blowing toward a populated area. (Too much wind and our "cloud" dissipates; under calm conditions, the product settles to the earth at the facility and is taken care of there.)

But the graphite fire at Chernobyl provided an actual way that about 90 million curies of radioactive material could be efficiently spread around the countryside. Yes, the anti-nukes got their dream of a large scale nuclear disaster - which had been becoming more and more difficult to conjure up, given the fact that Three Mile Island showed that the uncovered fuel elements couldn't even melt through the reactor vessel.

But there was bad news for them also. There weren't any bodies on the streets. Aside from those who died on-site, mostly firemen who expired from burns with possibly complications from radiation, there is no sign of a cancer epidemic or any other chronic problems.

Oh, sorry, there's one. The governments involved are going broke (broker?) from the payments they are making to victims. Victims? Didn't I just say there weren't any victims? Yes, but I meant from the radiation. The victims as defined by the governments involved are those who were traumatized by fear of radiation or from the trauma of being evicted from their homes and forced into refugee camps.

Of the radionuclides escaping from the burning graphite reactor at Chernobyl, the one of most concern was cesium 137. A gamma emitter with a half-life of thirty years, this reactor product settled to Earth over much of Europe. Yes sir, it did. But nobody seemed to notice it settled right on top of soil that already contained naturally occurring radioisotopes such as U238, Th232, and K40. In a mistaken spirit of humanitarianism, the Soviet Army evacuated its citizens when the dose from the Earth exceeded 0.5 cGy (500 mrad) per year. [One of the purposes of this book is to show how some authorities - even nuclear officials - have no connection with reality and, indeed, make recommendations and rules that cause great harm. This example shows nationality is no barrier.]

They apparently didn't notice they were already sitting on "highly radioactive" dirt. Figure 5 shows the Chernobyl contamination relative to naturally occurring radiation. Is it any wonder that the "Project Team's Main Recommendations" included the following?

"Measures with less impact on traditional agriculture should be investigated; better public information is needed, particularly on doses and risks, and studies of the acceptability to people of living in contaminated areas." [Emphasis added.]

Table 11 – Chernobyl Cs 137 Burden in Various Areas vs. Natural Background


Location
Range (Bq/m^2)
European Cs 137 contamination outside former USSR
20,000 to 23,000
Cs 137 contamination inside former USSR
40,000 to 5,000,000
Natural radionuclides in soil of above areas
177,000 to 6,500,000


Source: Table 2 in 1997 statement by U.N. Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) member Zbigniew Jaworowski
Table 11 gives another look at the Cs 137 "fallout" and the natural radionuclides in the top 10 cm (about four inches) of soil in several locations around Chernobyl. Note the range of natural soil radiation. Wouldn't you think that someone would have noticed a variation in the detrimental effects of natural radiation when some areas had thirty-six times the soil radioisotopes of others - if indeed there were any detrimental effects? Would you think one area would be known as Cancervania - because of regular affliction of the populace from radiation, while another area would go by Vitalia, because of superior health derived from a dearth of radiation exposure? But we don't see Europe having such disparities in cancer or other immune disorders on the basis of location, do we?

Well, actually we do: the health resorts are almost always located on springs with a high radon content.

Saturday, January 9, 2016

Unclean!

On September 13, 1987, two thieves entered an abandoned clinic in Goiania, State of Goia, Brazil, and dismantled a machine used for radiation therapy. From it they took a stainless steel cylinder, which they broke apart with a sledge hammer an then sawed open a one-cubic-ince capsule filled with a glittering powder - cesium 137... 1,250 curies of it. Children in the junkyard began to play with it, and the workers took some home with them. Two weeks later, four people died, one was to have his arm amputated, and several skin grafting operations were required for those having had intimate contact with the highly radioactive isotope.

Four deaths from fire, traffic or a trench collapsing might have been totally overlooked by the news. But death by radiation is our modern-day leprosy. Fear of radioactive contamination caused the wholesale value of the entire agricultural production of the state to fall by 50%. Vacationers, afraid of the "invisible killer," cancelled 40% of the hotel rooms booked for the tourist season; conventions were moved to other states or called off. Hotels in other parts of the country refused to register Goians, while airline pilots and taxi drivers denied them transportation. Cars with Goiania license plates were stoned.

Of the 125,000 individuals who insisted on a Geiger scan, 8.3% showed signs of acute stress (extreme anxiety, rashes, vomiting, diarrhea) from fear - yet not one was found contaminated. The funeral of the first victim had to be delayed while police stopped the stoning and removed barricades at the cemetery. Where did this paralyzing fear of radiation come from? I would suspect that the Goian newspapers printed stories similar to those noted in Bernard Cohen's table of New York Times stories, resulting in similar attitudes toward the dangers of radiation.