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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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The Frisch-Peierls memorandum: A seminal document of nuclear history
The Manhattan Project is usually considered to have been initiated with Albert Einstein’s letter to President Franklin Roosevelt in October 1939. However, a lesser-known document that was just as impactful on wartime nuclear history was the so-called Frisch-Peierls memorandum. Prepared by two refugee physicists at the University of Birmingham in Britain in early 1940, this manuscript was the first technical description of nuclear weapons and their military, strategic, and ethical implications to reach high-level government officials on either side of the Atlantic. The memorandum triggered the initiation of the British wartime nuclear program, which later merged with the Manhattan Engineer District.
H. Maekawa, K. Tsuda, Y. Ikeda, Y. Oyama, S. Yamaguchi, M. Nakagawa, T. Fukumoto, A. Hasegawa, T. Mori, Y. Seki, T. Nakamura
Fusion Science and Technology | Volume 8 | Number 1 | July 1985 | Pages 1460-1465
Blanket Neutronic | Proceedings of the Sixth Topical Meeting on the Technology of Fusion Energy (San Francisco, California, March 3-7, 1985) | doi.org/10.13182/FST85-A39972
Articles are hosted by Taylor and Francis Online.
Tritium production-rate (TPR) distributions were measured in a Li2O slab assembly using the FNS. The size of assembly was 31.5 cm in equivalent radius and 61.0 cm in thickness. Enriched 6Li and 7Li sintered pellets of Li2O were adopted to measure the TPRs of 6Li and 7Li, separately. After irradiated pellets were treated chemically, tritium produced in the pellets was measured by a liquid scintillation counting system. Measured TPR distributions have been analyzed by using the three transport codes, DOT3.5, MORSE-DD and BERMUDA-2DN with ENDF/B-4 and JENDL-3PR1 nuclear data files. The JENDL-3PR1 improves the accuracy of calculated TPR very well for both 6Li and 7Li.
