Atomic Show #229 – Leslie Dewan and Mark Massie, Transatomic Power

On December 1, 2014, I talked with Leslie Dewan and Mark Massie, the co-founders of Transatomic Power, a tiny nuclear reactor design company started up less than 3 years ago. Several weeks ago, I published an article here titled Transatomic Power – Anatomy of Next. That article, as expected, generated a healthy discussion thread.

At the end of the initial article, I stated that I was arranging an interview with the founders. I’m not always the most prompt person, but I try to follow through on such promises.

Dewan and Massie have developed a conceptual design for a fluid fueled reactor that consumes actinides with a low concentration of fissile isotopes dissolved in molten salt to produce vast quantities of reliable heat. Using conventional heat exchangers, their system uses that heat to boil water and uses the resulting high temperature, high pressure steam to drive a turbine and produce electricity.

Aside: Like many nuclear engineers, Massie and Dewan have focused most of their early design efforts on the reactor portions of their system. The power production portion has received little attention so far. End Aside.

The initial concept of a molten salt reactor was developed and proven at the Oak Ridge National Laboratory in the 1950s, 1960s and 1970s.

The main innovations that Massie and Dewan have introduced are 1) using zirconium hydride for neutron moderation instead of graphite and 2) using LiF salt without any beryllium. LiF salt can dissolve a substantially higher concentration of actinides. The combination of those two innovations enables a smaller reactor to obtain and maintain criticality with a fissile isotope concentration of just 1.8% of the actinides in solution.

Aside: That concentration is a little lower than the material that is removed from light water reactors after producing 40,000 to 50,000 MW-days/ton of heavy metal. Up until a few years ago, that material was nearly always referred to as “spent nuclear fuel,” an appellation that implied it was just waste and had no future utility. Not long ago, more prescient people began referring to the material as “used nuclear fuel,” helping others to understand that the material still contained a large fraction of its initial potential energy. An even better term, especially in light of the innovative thinking of people like those at Transatomic Power, is reusable fuel. End Aside.

Massie and Dewan were interesting, cooperative and open about their current status, the difficulty of the challenge that they have chosen to address, and the long road that they must traverse in order to achieve their goals. They admit that they are a bit on the idealistic side, but have admirable youthful optimism about the power of innovation to address the technical challenges.

At the beginning of our discussion, we talked a little about the November 2011 TEDx talk that they gave in Boston. The Transatomic Power site hosts an embedded video of that talk.

Dewan and Massie expressed their concerns about the numerous strings that slow atomic energy development and are working to help leaders understand the vast potential that the US and much of the rest of the world is avoiding by its current regulatory construct. I believe their kind of thinking needs to be nurtured and encouraged. At the end of the show, they told me they wanted to participate in a well-moderated, professional discussion about their technology.

Atomic Insights should be a good place for such a discussion.

Keep it civil. Open up some minds to the fact that there is vast potential for creative problem solving in atomic energy technology. Challenge the myth that is propagated by the opposition that nuclear fission is old, obsolete technology. The reality is that fission the only really new power source discovered and usefully developed in the last century.


Correction: An earlier version of this article incorrectly stated that both Dewan and Massie have PhD’s in nuclear engineering from MIT. Though Dr. Dewan completed her PhD defense several years ago; Mr. Massie is still “a few weeks away from having his Ph.D. to be completely technically correct about it.”


I’d like to thank those generous Atomic Insights readers and Atomic Show listeners who have provided financial contributions and other support, including spreading the word about this site.

If you like Atomic Insights and believe that more people need to hear about the information posted here, please make a value-for-value contribution using the button below.






Note: Atomic Insights LLC is a for-profit company. We have chosen a business model that gives our product the widest possible distribution. Nuclear professionals and other nuclear energy enthusiasts obtain value from our product and by having the ability to share this product freely with those who do not fully understand why atomic fission is so important to our future.

Some of those who benefit are providing much appreciated support.

So far, that model is working out pretty well. It helps keep the site ad-free, with content dictated by reader/listener interest.

Play

Corvallis to Richland and back

DSCN2732

After an informative tour of the NuScale facilities in Corvallis, OR on October 20, I continued my quick visit to the Pacific Northwest. I had originally arranged my travel plans to fly into Portland, OR instead Richland, WA — which was my ultimate destination — for a variety of reasons. It enabled the visit to […]

Read more »

Atomic Show #222 – How Proposed EPA CO2 Rule Rewards States for Replacing Nuclear With Gas

On August 20, 2014, Remy DeVoe, a graduate student in nuclear engineering at the University of Tennessee, published an earthshaking piece on ANS Nuclear Cafe titled Unintended Anti-Nuclear Consequences Lurking in the EPA Clean Power Plan. Unfortunately, there has been a bit of a delayed reaction; so far, only the most carefully tuned instruments have […]

Read more »

Grand Opening of the Apprentice School at Newport News Shipbuilding

Yesterday, on an unusually warm December day, I attended the grand opening of the new Apprentice School building in downtown Newport News, Virginia. It was an event that made me proud to be an American, proud to be a Virginian and proud to be a veteran of the US Navy. I was a member of […]

Read more »

Atomic Show #210 – Leadership by Navy nukes

This show was inspired by a post on Life, Liberty and the Pursuit of Healthiness titled Why I’m Not Afraid of Fukushima. That post was written by a guest blogger named Jeremiah Scott; he is an electrical engineering student who is attending college in the Pacific Northwest with the help of the GI bill. He […]

Read more »

First hand report from trained US Navy radiation worker about experience associated with Fukushima

The below first appeared in the comment thread of an article by Dr. Kelvin Kemm titled Physicist: There was no Fukushima nuclear disaster. I highly recommend going and reading the full article. However, I believe that this comment thread extract deserves more attention that it would normally receive by being buried within a lengthy thread […]

Read more »

Atomic Show #208 – Communicating about nuclear energy

On the evening of September 22, 2013, I gathered a group of friends who are also pronuclear communicators. We spoke for nearly 90 minutes about some of the challenges that we face in helping people to understand the enormous benefits provided by atomic energy and the vast array of good things we are giving up […]

Read more »

Nuclear professional explains why he strongly reacts to antinuclear statements

This post originated as a comment buried deep in a thread that already includes more than 100 comments. It clearly explains why nuclear energy professionals can become rather abrupt when engaging in conversations about energy with people opposed to nuclear energy that claim to be energy policy experts. That is especially true in cases where […]

Read more »

Is an employee buyout a win-win-win solution for Kewaunee Nuclear Power Station?

Dominion’s October 2012 announcement that it is closing the Kewaunee Nuclear Power Plant took the nuclear industry by almost complete surprise. My friends who write about nuclear topics on a regular basis had no clue about the possibility before it was announced. None of the contacts that I have developed over the past few decades […]

Read more »

Atomic Show #198 – Women are empowered by reliable energy

A few days ago, Steve Aplin wrote an inspiring post on Canadian Energy Issues titled The electric grid: the greatest invention of all time expanded after women won the vote. That post described how important electricity was to the effort to free women from household chores so that they could choose to pursue more interesting […]

Read more »

Atomic Show #196 – Atomic Optimists

On Sunday, February 17, 2013, a group of five nuclear energy professionals gathered to share their thoughts about the current state of the atomic energy business. Participants included: Margaret Harding (@M2harding), 4 Factor Consulting Meredith Angwin (@yes_VY), Yes Vermont Yankee Andrea Jennetta (@NuclearBuzz), Fuel Cycle Week and I Dig Uranium Cal Abel (@cal_abel), PhD candidate […]

Read more »

Atomic Show #188 – Wheeler and Harding discuss ANS Utility Working Conference

During the first week of August each year, the American Nuclear Society hosts a conference called the Utility Working Conference (ANS-UWC). It is one of my favorite ANS meetings because it draws a crowd of professionals whose daily employment is focused on safely operating electricity production facilities powered by atomic fission. Those facilities produce 20% […]

Read more »