Tuesday, December 19, 2017

Atoms for Peace

Red Baron happened to be in Geneva when in 1958, the United Nations hosted the Atoms for Peace Conference and Exhibition. During semester breaks, I used to serve my father as a driver on his business trips. So we visited the exhibition, and we were both impressed.


When I was looking for an illustrating picture - the slides I took at that time have long since faded - I came across a citation by Frederick Reines. He was awarded the 1995 Nobel Prize in physics for detecting the neutrino in experiments he had conducted with Clyde Cowan in 1956. So he indeed had given a paper in Geneva in 1958. In 1996, following his Nobel Prize award, Reines came to CERN and gave a lecture that Red Baron attended.

Atoms for Peace had started with President Eisenhower's speech at the United Nations in New York on December 8, 1953, expressing the conviction that from then on, atomic energy would solely be used peacefully under the auspices of an atomic energy agency.

He said, "The atomic energy agency could be made responsible for the impounding, storing, and protecting the contributed fissionable and other materials. The ingenuity of our scientists will provide special safe conditions under which such a bank of fissionable material can be made essentially immune to surprise seizures.

"The more important responsibility of this atomic energy agency would be to devise methods whereby this fissionable material would be allocated to serve the peaceful pursuits of mankind. Experts would be mobilized to apply atomic energy to the needs of agriculture, medicine, and other peaceful activities. A special purpose would be to provide abundant electrical energy in the power-starved areas of the world.
"

How far did we get? Concerning the first paragraph, the checks and inspections of fissionable material by the International Atomic Energy Agency (IAEA)* in their member states are thorough and efficient.
*established in 1957

Red Baron still remembers the nuclear inspectors visiting CERN to check the quantity and quality of the tons of depleted uranium (DU) the organization kept on its premises. Due to its high density, the material is still used as an absorber or shielding material in particle detectors. Proudly the inspectors demonstrated their ingenuity showing that the degree of depletion of 235U was smaller in DU acquired from Russia than in material coming from the States, proving that the extraction of fissionable 235U from natural uranium was more efficient in the US.

These inspections were peanuts and fun for the men from Vienna, but what about checks in countries operating nuclear power reactors breeding fissionable plutonium as a by-product? Some states meticulously grant IAEA inspectors access to all their nuclear stock, but a few countries are less open. Although the government agreed to inspections, the situation does not look so bright with Iran but is absolutely somber with North Korea openly building the hydrogen bomb.

One may think that at least Eisenhower's hopes expressed in the second paragraph were fulfilled, i.e., applying atomic energy to the needs of agriculture, medicine, and other peaceful activities. Today the euphoria of 1958 has considerably faded. Yes, there are powerful diagnostic tools in treatment based on radioactive tracers. Still, radioactive materials in cancer therapy are already increasingly replaced by effective and more specific chemotherapies.

Finally, nuclear power has developed into a significant problem for the coming generations. The energy is not clean, producing radioactive waste for which we cannot guarantee safe storage in the far future. Red Baron has reported on this.

Three weeks ago, the University of Chicago celebrated the 75th anniversary of Enrico Fermi's first successful nuclear reactor experiment in a structure beneath the viewing stands of a football field on December 2, 1942.

Enrico Fermi's reactor set up.
During my professional life visiting Fermilab, I made a pilgrimage to the site that is honored by a Henry Moore sculpture symbolizing an atomic mushroom - and a skull.

©UChicago
This mushroom, the portent of the atomic age, that Cai Gu-Quian, a 59-year-old Chinese artist living in New York, stages ephemeral art based on fireworks and gunpowder, wanted to simulate. About the event we read in the press:

Cai Guo-Qiang said: "In the 1990s, I used black gunpowder to create mushroom clouds, humankind's most iconic visual symbol for the 20th century. These mushroom clouds formed part of my Projects for Extraterrestrials. Today, the color mushroom cloud symbolizes the paradoxical nature of employing nuclear energy: Who is it for?"

"The work dramatizes the creative and destructive forces of nuclear fission," said Steward*. "It takes the iconic shape of nuclear energy's most destructive form and animates it with color as a profound symbol of creativity and peace."
*Laura Steward, curator at the Smart Museum of Art on the campus of the University of Chicago

Wosh ... (©UChicago)
Ah ... (©UChicago)
The mushroom (©UChicago)
Sorry, this event was just macabre and not at all colorful!
*

1 comment:

  1. prof premraj pushpakaran writes -- 2018 marks the 100th birth year of Frederick Reines!!!

    ReplyDelete