Robert L. Hellens, 1971
Reactors: In recognition of numerous pioneering contributions to the field of light water reactor physics, for work in reactor static, and the Fouier transform approach to the solution of Boltzman transport equation, which formed the basis of design work on many large light water moderated power reactors and naval reactors, and for comprehensive and classic analyses of light water exponential and critical experiments which have contributed greatly to the understanding and improvement of design procedures for light water power reactors.