Letter from the Editor: RTGs, Batteries That Last and Last

This issue was inspired by a request from one of our Internet readers for more information about nuclear batteries. It seems that a short article in the April, 1995 issue of AEI was one of the few hits returned on a key word search for the phrase radioisotope thermal generator. He was interested in learning…

Nuclear Batteries: Tools for Space Science

The Apollo missions to the moon are famous for heroic astronauts, exciting first steps and incredible pictures that fired the imaginations of a whole generation of scientists, engineers and school children. Mixed in along with the hoopla about sending men into space on huge, fire spewing rockets, however, was some serious science. Each time the…

In the News: September 1996

Russian Nukes Short of Cash (Aug 25, 1996) – Like many parts of the Russian economy, the nuclear power industry is burdened with major customers that often do not pay their bills. According to a Reuter’s news story Rosenergoatom (the nuclear plant operating company) is close to making a decision to shut down some of…

Earth Bound RTG Systems: Uses Closer to Home

Not all of the RTGs that have been produced have been designed for use in space. Here on earth, there are some applications where even extremely expensive RTGs have been able to successfully compete with other power supply alternatives. Here are the criteria that seem to be necessary to make RTGs a potential choice under…

RTG Heat Sources: Two Proven Materials

Essentially all RTGs that have been produced have been designed for long term unattended operation. An isotope needs several rather specialized attributes to be useful in such an RTG: Half life of several decades High energy alpha or beta decay Low associated gamma radiation The two isotopes that have been most frequently used are Pu-238…

Sources for Atomic Energy Insights September 1996 (RTGs)

Bennett, G. L. et al “Status Report on Radioisotope Thermoelectric Generators using Silicon Germanium Thermoelectric Elements”, paper presented at the 29th Intersociety Energy Conversion Engineering Conference, Monterey CA, 1994. AIAA-94-4127-CP Kelly, E C. and Klee, P. “Cassini RTGs – Small Scale Module Tests”, paper presented at the 29th Intersociety Energy Conversion Engineering Conference, Monterey CA,…

Cassini: Near Term Use of RTGs

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…