By late 1960, when the U.S. Atomic Energy Commission authorized plans to build a Molten Salt Reactor Experiment (MSRE) at Oak Ridge National Laboratory, the lab already had about 13 years of experimentation with molten salt reactors under its longest-serving lab director, Alvin Weinberg. The MSRE operated from 1965 to 1969, proving that molten salt reactors could operate reliably, and with alternatives to uranium-235 too.

For many of us, the toys of our childhood leave indelible marks on our consciousness, affecting our long-term perceptions and attitudes about certain things. Hot Wheels may inspire a lifelong fascination with fast, flashy automobiles, while Barbies might shape ideas about beauty and self-­image. For the generation who grew up during the Atomic Age—the post–World War II era from roughly the mid-1940s to the early 1960s—the toys, games, and entertainment of their childhoods might have included things like atomic pistols, atomic trains, rings with tiny amounts of radioactive elements, and comic books, puzzles, and music about nuclear weapons.

On the eve of the 80th anniversary of the first controlled nuclear chain reaction, Nuclear Newswire is back with the second of three prepared #ThrowbackThursday posts of CP-1 coverage from past issues of Nuclear News.

On November 17, we surveyed the events of 1942 leading up to the construction of Chicago Pile-1, an assemblage of graphite bricks and uranium “pseudospheres” used to achieve and control a self-sustaining fission reaction on December 2, 1942, inside a squash court at the University of Chicago’s Stagg Field.

Today we’ll pick up where we left off, as construction of CP-1 began on November 16, 1942.

As we approach the 80th anniversary of controlled nuclear fission, Nuclear Newswire is prepared to deliver not one but three #ThrowbackThursday posts of CP-1 highlights unearthed from past issues of Nuclear News.

ANS was founded in 1954, nearly 12 years after the first controlled nuclear chain reaction was achieved on December 2, 1942, inside a pile of graphite and uranium assembled on a squash court at the University of Chicago’s Stagg Field. By 1962, ANS was prepared to “salute the 20th anniversary of the first chain reaction” at their Winter Meeting, displaying a model of Chicago Pile-1 and presenting a specially cast medal to Walter Zinn, a representative of Enrico Fermi’s scientific team. Over the years, ANS has continued to mark significant anniversaries of CP-1 at national meetings and in NN.

The Naval Academy ANS student section, with support from the Washington, D.C., local section, held its semiannual dinner on March 29 in Annapolis, Md. The event was attended by more than 100 people, including midshipmen, professors from the U.S. Naval Academy, local ANS members, and ANS President Steve Nesbit.

The evening’s program was hosted by the student chapter president, Midshipman First Class Sara Perkins, and was headlined by the director of the Naval History and Heritage Command, Rear Admiral (retired) Samuel Cox.

ANS past president (1974–1975) J. Ernest Wilkins Jr. was featured in a recent History.com article highlighting the unsung contributions that Black scientists made to the Manhattan Project.

As is the case on every 10APR, I find myself – even in the midst of the present national and, really, worldwide crisis – returning to thoughts of the USS THRESHER on this date in 1963. All of us who have been through the Naval Nuclear Power Program and served in submarines are aware to greater or lesser extent what happened; my experience, having served aboard one of the SUBSAFE boats whose development was a direct result of the accident, lends perhaps to more sustained reflection.

At the end of the 1950’s the US Army was looking at its entire operational sphere to determine in what areas nuclear energy could be of benefit. While many of these are fairly well known today – for example, the small nuclear plants that were to have been installed at remote locations for powering bases like the Defense Early Warning stations – there are a few applications that remain obscure.

Our ANS Nuclear Cafe matinee feature this week is a fascinating in-depth look at the fabrication of major components for, and the construction of, the Shippingport Atomic Power Station. In this film you’ll get to see some very interesting, rarely seen things; I will add some comments above and beyond what’s described in the film below.

Our ANS Nuclear Cafe Friday Matinee feature this week is a film produced to detail the United States Army’s nuclear power program; it was archived and then put online by the US Army Corps of Engineers, Baltimore.