Once Rickover’s team selected water as their primary reactor coolant, other material criteria became readily apparent. Though pure water at room temperature is a relatively benign environment, water at high temperatures is quite corrosive. Because radioactive fission products can be dangerous to human health, prudent reactor designers must devise methods to ensure that the fission…
Pressurized water reactors turned out to be extremely stable power producers. Because of the fact that water is used to moderate the energy level of neutrons, making them more effective in causing fission, the concentration of water in the core is an important part of determining the reactivity of the core. Temperature control An increase…
Though water was chosen partially because it was a familiar fluid for power engineers, the choice almost doomed the nuclear submarine program. Laboratory testing of the pumps, bearings, valves, and piping demonstrated to Rickover’s team that the simple, familiar fluid was not so simple at high temperatures and pressures, particularly when exposed to neutron radiation….
When Rickover first began studying nuclear technology, he found a program in severe disarray. The Army’s Manhattan Project had accomplished its mission of completing a workable bomb before the end of the war. Many of the key scientists and engineers had left the program, eager to leave the security restrictions and poor working conditions behind….
At the top of Mt. Washington, New Hampshire, for example, electricity for the weather station is provided by a diesel generator using fuel that must be moved by small tanker trucks struggling up a very steep grade. The Army Nuclear Power Program was established as part of the Atomic Energy Commission in 1954. It was…
Designation Description of Reactors SM-1 This stationary military reactor was the Army’s prototype and training facility. It began operation in April 1957 at Fort Belvoir, VA, several months before the Shippingport reactor. SM-1 has the distinction of having been the first nuclear power plant to be hooked to an electrical grid. 2,000 kw. SM-1A Built…
The United States Army ran an innovative nuclear power program for more than 20 years. The men involved operated a series of small, nuclear heated generating plants in some of the world’s least hospitable environments. The story of what those diligent heros did has been all but lost. Though the Army was the lead service…
Conventional wisdom holds that a breeder reactor produces more fuel than it uses. This idea is fascinating to some, but confusing to a whole group of rational people. It sounds too much like science fiction or Madison Avenue hype. Actually, a breeder reactor is not magic, but it is a marketing exaggeration to state that…
AEI would prefer to concentrate its efforts on discussing the incredible technical potential of nuclear energy while leaving the discussion of politics and personality to others. When trying to understand nuclear energy technical decisions, however, it is essential to understand some of the political issues involved. For the last 20 years, there has been an…
Soon after the development of the first nuclear reactors, scientists and engineers began to discuss the possibility of a nuclear fuel shortage. As far as these nuclear pioneers knew, there was a rather limited supply of uranium that was concentrated in certain areas of Africa and Eastern Europe. The situation was considered even more critical…
At 12:30 am, on August 26, 1977, the operators at the Shippingport Atomic Power Station began lifting the central modules of the experimental breeder reactor core into the blanket section. At 04:38 am, the reactor reached criticality. During the next five years, the core produced more than 10 billion kilowatt-hours of thermal power – equivalent…
The Japanese nuclear ship Mutsu is designed not for show, but for research. She is currently being used by the Japan Atomic Energy Research Institute (JAERI) as a test bed to validate computer models of the behavior of pressurized water reactors in an ocean environment. The Mutsu has a 10,000 shaft horsepower nuclear engine. The…