1.   But the fact remains that the safeguards themselves do not prevent the government using civil plutonium for defence purposes.

2.   Also, Americans do not want to encourage Russia to use its plutonium in its existing power plants unless they can be upgraded to meet Western safety standards.

3.   A plutonium bomb uses plutonium as the active material involved.

4.   A variation of the thorium idea may allow the Department of Energy to use excess plutonium in commercial nuclear power plants, also without creating byproducts suitable for weapons.

5.   But the letter from the environmental groups argues that any American strategy that helps others use plutonium in civilian reactors is a proliferation risk.

6.   But some arms control experts complained immediately that using the plutonium in civilian reactors could increase the amount of potential weapons fuel in circulation around the world.

7.   But they have not turned Japan away from using plutonium.

8.   I had the idea of using plutonium, but we had no means of making it.

9.   In most other circumstances, using plutonium for power is a bad idea, because it usually requires converting relatively benign forms of plutonium into potential bomb ingredients.

10.   In the New York area, the Niagara Mohawk Power Co. has expressed interest in using plutonium at its two Nine Mile Point units, near Syracuse.