Cryptome points to a paper http://www.sandia.gov/eqrc/critical/meyer.pdf
Using Integrated Circuits in Critical Applications Workshop Integrated Circuits in Nuclear Weapon Applications Wherein we learn, ca. 1997: there are no chips in nukes (p 8) Sandia is considering Java for nukes (p 15) Neat tricks for self-health-monitoring circuits (and tamper-resistant; crypto relev!)