National Museum of Nuclear Science & History
Raphael Semmes worked for Clinton Laboratories at the X-10 Reactor.
Warren Sheehan joined Mound Laboratory in April 1956. He spent the first half of his career in health physics, or radiation safety, where he developed a new methodology for determining the amount of plutonium in urine.
Frank Fessenden worked for the Tennessee Eastman Corporation at the Y-12 Plant.
