QUOTE : Uh-huh. That’s one reason we don’t have a nuclear power plant. This far from the sun, we don’t get enough emission to worry about. The asteroid’s mass screens out what little may arrive. I know the TIMM system is used on ships; but if nothing else, the initial cost is more than we want to pay.” “What’s TIMM?” inquired the Altair’s chaplain. “Thermally Integrated Micro-Miniaturized,” Ellen said crisply. “Essentially, ultraminiaturized ceramic-to-metal-seal vacuum tubes running off thermionic generators. They’re immune to gamma ray and magnetic pulses, easily shielded against particule radiation, and economical of power.” She grinned. “Don’t tell me there’s nothing about them in Leviticus, Padre!