[jveritas]

Tantalum is one of the most expensive and rarest metals on the planet and it is highly resistant to corrosion. Tantalum or Graphite coated Tantalum are one of the few materials that can resist the highly corrosive Uranium Hexofluoride (UF6) which is the main ingredient for enriched Uranium.

[BenLurkin]

Okay, and I guess a "neutron generator" is something that generates neutrons so they can be used for something to do with nuclear fission.

I will adjourn to Google to research for a moment (but I may return with more dumb questions).