ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Trinity Test at 80: American Nuclear Society CEO Craig Piercy reflects on the Manhattan Project
By Craig H. Piercy, CEO and Executive Director of the American Nuclear Society
Eighty years ago today, at exactly 5:29:45 a.m. local time* on July 16, 1945, the United States Army detonated the world’s first nuclear bomb in the Jornada del Muerto desert of southern New Mexico. The searing flash and thunderous shockwave marked the culmination of the Manhattan Project, a secret, three-year national effort to harness nuclear fission and hasten the end of the Second World War.
The Trinity test, overseen by Manhattan Project director Major General Leslie Groves and Los Alamos Laboratory director Dr. J. Robert Oppenheimer, was the final act of that race to build the atomic bomb. Hoisted atop a 100-foot steel tower, the plutonium implosion device, known as the Gadget, unleashed a blast equal to 21,000 tons of TNT and temperatures hotter than the center of the Sun.
From ten miles away, observers wearing darkened welder goggles, looked on in stunned silence. “We knew the world would not be the same,” recalled Oppenheimer.
A. D. Krumbein, M. Lemanska, M. Segev, J. J. Wagschal, A. Yaari
Nuclear Technology | Volume 48 | Number 2 | April 1980 | Pages 110-116
Technical Paper | Reactor | doi.org/10.13182/NT80-A32457
Articles are hosted by Taylor and Francis Online.
Calculations were performed for 238U and 232Th blankets for a fusion hybrid reactor. Comparisons between results using ENDF/B-III and ENDF/B-IV cross sections for 238U were made. Corrections to the latter cross-section set were suggested, bringing the computed results close to the reported experimental ones. Computations using ENDF/B-IV 232Th cross sections were found to agree very well with experiment.
