A recent Twitter thread by @darth placed the “Avenge The Fallen” tagline of the upcoming Avengers: Endgame movie on top of deceased characters. So, in the spirit of fun-yet-educational content, I created this series of images about decommissioned commercial nuclear reactors in the U.S.

This post is expanded off of a tweet thread with much of the same content, but with many more broken links (oops). I’d recommend reading the content here.

Some quick terminology first. This article only consists of commercial nuclear plants that have been officially designated by the NRC as decommissioned or decommissioning. Once a reactor…


Starting in 2016, the Nuclear Innovation Bootcamp has revolutionized the way that students and early career professionals have viewed innovation in the nuclear energy industry. Traditionally a slow-moving field, nuclear power is starting to shake things up and embrace the startup culture. In 2015, Third Way tracked down approximately 50 companies and institutions developing advanced nuclear technology. By 2016, that was updated to about 60. Now, Third Way maintains data about the advanced nuclear industry in a spreadsheet and map and is at almost 80 organizations as of this writing.

Any student or early career professional looking for a career…


Attending university visit weekends as a potential graduate student was one of the most eye-opening things I’ve ever done as a student. I learned a lot about myself, gained vital information in the search towards the best graduate experience, and made some fantastic friends along the way. Here are my tips for any student looking to ace their visit and find the right grad school fit for them. University visit weekends often take place in February through early April, but these tips can apply anywhere in the graduate school process.


The narrative around climate change mitigation has been dominated by the “Green New Deal” proposal popularized by freshman congresswoman Alexandria Ocasio-Cortez (D-N.Y.). The final text of the resolution, introduced with Senator Ed Markey (D-Mass.), was recently released and is available here. The resolution is non-binding, however it provides a framework that will likely guide the discussion on how to tackle climate change from the national level.

The resolution itself is slightly ambiguous in its call for eliminating carbon emissions in the energy sector, a fact that energy experts on Twitter quickly jumped on. …


Dr. Anderson helped establish the Health Physics Society in 1955 and the American Board of Health Physics in 1960

Women’s History Month is a time to reflect back on the contributions of women, and to look forward to their potential. In nuclear science, there is a rich history of female physicists and engineers contributing to our field along with their male counterparts. From the radium to radioimmunoassay to reactors, women have defied the odds to become leaders in all areas of nuclear science and engineering.

While cliché, I truly feel as if I am standing of the shoulders of giants as a young woman in nuclear engineering. The sky is the limit for women in science today, because the…


Rosalyn Sussman Yalow was a medical physicist and won the 1977 Nobel Prize in Physiology or Medicine along with her partner Solomon Berson for the development of radioimmunoassay (RIA).

Born in 1921 in New York City, Dr. Sussman Yalow became interested in mathematics and chemistry at an early age. She attended Hunter College, which was an all-women’s college at the time (it is now part of the City College of New York). There, she earned a degree in physics, which had been newly created as a major during her senior year. Particularly fascinated with rapidly-evolving field of nuclear physics, and…


Happy Women’s History Month! Each week during the month of March, one woman from the history of nuclear science and technology will be featured on the ANS Nuclear Cafe.

As a woman and a nuclear engineer myself, I am honored to have so many female role models to look up to. Many incredible female physicists and engineers blazed the path for me and the women around me to succeed, and we honor their legacy as we begin to build our own.

However, with nuclear engineering comprised of only about 11.5% women, I believe we should also push ourselves to do…

Katie Mummah

Nuclear Engineer and graduate student

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store