David D. Clark, Cornell professor of nuclear science and engineering and former director of the Ward Laboratory of Nuclear Engineering, was elected a Fellow of the American Nuclear Society, the group's highest honor.

He was honored for the achievement at the society's Nov. 12 meeting in Washington, D.C.

Clark was cited for "the conception, design and development of a succession of novel experimental facilities and instruments for the performance of unique research in nuclear science and engineering including estimation of reactor physics parameters under isothermal conditions, determination of short-lived isomer decay schemes, measurement of delayed neutron energy spectra and utilization of cold neutrons."

Clark had been director of the Ward Laboratory -- the planning and design of which he oversaw -- from 1961 until this year. He came to Cornell in 1955 from the Brookhaven National Laboratory, where he had been a research associate. He earned an undergraduate degree in 1948 and a doctorate in 1953, both from the University of California.