According to the Nuclear Control Institute, a private policy group in Washington, the United States is the world's principal supplier of tritium.

The Nuclear Control Institute, an antiproliferation group based in Washington, argues that a plutonium core makes a nuclear accident slightly more likely.

Another book, was published by the Chemical and Biological Arms Control Institute in April 2003.

Paul Leventhal, president of the Nuclear Control Institute, told the commission at a hearing today that there was no excuse not to move immediately.

Paul Leventhal, president of the Nuclear Control Institute, a policy group in Washington, said the visit "is part of a pattern that offers promise."

Now the dangers have been summed up again by the Nuclear Control Institute, a Washington think tank.

The amount is less than is needed to trigger a low-technology bomb; estimates by the Nuclear Control Institute of Washington range from 12 pounds up.

However Paul L. Leventhal, president of the Nuclear Control Institute, said he has no evidence the reactor was ever built.

The Nuclear Control Institute is a research and advocacy center for preventing nuclear proliferation and nuclear terrorism.

Paul Leventhal, president of the Nuclear Control Institute, said the very idea that utilities could complain about the cost was "absolutely outrageous."