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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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New coolants, new fuels: A new generation of university reactors
Here’s an easy way to make aging U.S. power reactors look relatively youthful: Compare them (average age: 43) with the nation’s university research reactors. The 25 operating today have been licensed for an average of about 58 years.
V. Spiegel
Nuclear Science and Engineering | Volume 54 | Number 1 | May 1974 | Pages 28-34
Technical Paper | doi.org/10.13182/NSE74-A23390
Articles are hosted by Taylor and Francis Online.
The age of 252Cf fission neutrons to indium resonance energy (1.44 eV) was measured in water using a source encapsulated in a 7.6-mm-diam by 7.6-mm-high cylinder. The correction for the displacement of the moderator by the source was experimentally determined to be -0.13 cm2 or about -0.5% in approximate agreement with calculation. The distribution of indium resonance energy neutrons close to the source was measured to be Gaussian. The age measured for this experiment was 28.69 ± 0.39 cm2. An average energy for the 252Cf neutron spectrum of 2.21 ± 0.05 MeV is inferred from this age.
