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Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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!
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New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
Nicola Pacilio
Nuclear Science and Engineering | Volume 35 | Number 2 | February 1969 | Pages 249-258
Technical Paper | doi.org/10.13182/NSE69-A21140
Articles are hosted by Taylor and Francis Online.
A method is proposed for measuring the prompt decay eigenvalue of the neutron population. It is based on the determination of the covariance of the integrated outputs from two neutron detectors placed in a nuclear reactor, for different values of the integration time interval. The covariance is measured by an analysis of the four types of combined outputs which can occur if only the sign of the signal with respect to its mean is recorded from each detector. In fact, the frequence of every combination ++, −+, −, +− assumes a different value according to the degree of coherence between the two detector counting outputs. The method allows experiments to be made with low-detection efficiency and can be applied also to fast reactor-noise analysis, unlike all the other variance-type procedures. Since the detection of only the sign of the variables is needed, a pulse counter is not indispensable and, therefore, the technique is expected to be applicable even to nonzero power reactors.