The only planned use of RTGs in the US space program in the near term is the unmanned, 1997 Cassini mission to explore Saturn. The Cassini spacecraft will be powered by three General Purpose Heat Source Radioisotope Thermal Generators (GPHS RTGs) each designed to provide 276 W of electrical power at the beginning of the […]
Reactors
New Nuclear Power Barges: Russians Build on Ice Breaker Lead
The northern coast of Russia is an area endowed with rich natural resources and vast mineral wealth but burdened with a limited infrastructure. Because of the extremely cold winters, transportation is difficult and infrequent. During the Soviet era, finding workers to exploit the riches was not difficult; they had little choice in the matter. Once […]
SL-1: Designed for Remote Power and Heat
The Army’s designation , SL-1, tells us that the plant was a stationary, low power reactor, and that it was the first of its kind. The design work was done by Argonne National Laboratory in 1955-1956 under the name Argonne Low Power Reactor (ALPR). SL-1’s mission was to provide power to radar stations along the […]
PHWR Historical Problem Areas: Sources of Incidents
The pressure tubes of a CANDU® are in a hostile environment that includes a high neutron flux, hot, high temperature water, and a certain amount of hydrogen and oxygen released by the decomposition of water by radiation.Though the CANDU® has proven itself to be a reliable, cost effective and safe power generation system, there are […]
Isotope Production: Dual Use Power Plants
Nuclear reactors are not just a source of heat for power production. They are also an abundant source of neutrons, which allows the plants to be in a process of transmutation which makes the old dream of alchemy a reality. Since neutrons are neutrally charged, they have the ability to insert themselves in a wide […]
Pressurized Heavy Water: Using Available Resources
In many ways a CANDU® nuclear plant is conceptually related to a standard pressurized water reactor plant system. It has two separate heat transfer loops whose fluids never directly interact. The two loops physically meet in large heat exchangers called steam generators, which are very similar in design to those used in PWRs. One fluid, […]
Letter from the Editor: Reactors With a Can-Do Attitude
One of the highest compliments that you can pay to a submariner is to describe him as someone with a “can-do” attitude. This implies that he will cheerfully find a way to overcome any obstacle. Perhaps that is one reason that I have always admired the name, CANDU®, that was chosen for the Canadian heavy […]
Some Reactors CANDU®: What Others Cannot
An understanding of some of the features of the CANDU® reactor design makes it obvious that many of the negative perceptions about nuclear power are, in fact, based on characteristics of a single type of reactor. Simple Fuel Manufacture One common misconception about nuclear energy is that fuel manufacture is a complex endeavor that requires […]
Keep it Simple: Complex Systems Cost More
A first generation Adams Engine might achieve a thermal efficiency of approximately 30-35 percent, instead of the 55-60 percent that is currently being advertised for advanced gas turbine power plants. Many people seem offended by the very idea of producing a system that is less efficient than existing systems, but the important characteristics of a […]
Atomic Gas Turbines: Applying Related Inventions
Many of the greatest innovations – if carefully investigated – can be seen to be the result of of an inventor recognizing other inventions had made it possible to achieve a long awaited dream. For example, the story of the Wright Brothers’ first flight is incomplete without the story of the internal combustion engine. The […]
Letter from the Editor: Small Is Beautiful
At the request of several readers, we have decided to dedicate this issue to discussing the Adams Engine concept. Rather than talking about technical details, however, we have decided to talk about general principles and philosophies. Adams Atomic Engines, Inc. has determined that it is possible to build uranium heated machines that can fulfill many […]
The Accident at Chernobyl: What Caused the Explosion?
On April 26th, 1986, at 1:23 am, Alexander Akimov did what he and thousands of other nuclear plant operators have been trained to do. When confronted with confusing reactor indications, he initiated an emergency shutdown of Unit 4 of the large electricity generating station near Pripyat in Ukraine. By doing so, he unwittingly initiated an […]
