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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.
R. M. Harbour, K. W. MacMurdo, F. J. McCrosson
Nuclear Science and Engineering | Volume 50 | Number 4 | April 1973 | Pages 364-369
Technical Paper | doi.org/10.13182/NSE73-A26571
Articles are hosted by Taylor and Francis Online.
The partial 2200-m/sec equivalent neutron capture cross sections (σ2200) and neutron capture resonance integrals (Ic) of 432.7-yr 241 Am to produce 152-yr 242mAm and 16.01-h 242gAm were measured relative to 59Co standards. The number of 242mAm atoms produced per 241 Am target atom was determined by high precision mass spectrometry after chemical purification of americium. The number of 242gAm atoms produced per 241Am target atom was determined by measuring the alpha activity of its 164.4-day 242 Cm daughter. The measured values for 241 Am are as follows: σ2200 (to 242mAm) = 83.8 ± 2.6 b, Ic (to 242mAm) = 208 ± 18 b (0.369-eV cutoff), σ2200 (to 242gAm) = 748 ± 20 b, and Ic(to 242gAm) = 1330 ± 117 b (0.369-eV cutoff). Measured values are compared with those calculated from the ENDF/B-III neutron cross-section library.
