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Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
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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.
S. B. Gunst, D. E. Conway, J. C. Connor
Nuclear Science and Engineering | Volume 56 | Number 3 | March 1975 | Pages 241-262
Technical Paper | doi.org/10.13182/NSE75-A26738
Articles are hosted by Taylor and Francis Online.
Samples of 235U, 233U, 239Pu, and 232Th have been irradiated in high neutron fluxes [>1014 n/ (cm2 sec)] and their decay heat has been measured as a function of cooling time ranging from 14 to 4500 h after removal from the high flux. To measure the rate of heat emission, an underwater calorimeter has been developed. For the measured exposure histories, decay heat has also been calculated for concentrations of 190 fission products, all significant heavy isotopes, and structural nuclides. Account is taken of the energy carried by gamma rays that escape the calorimeter. Measurements and calculations of the decay heat captured within the calorimeter agree within two standard deviations for all samples and cooling times and, in general, agree within 2%. For the 235U sample, calculations based on the Proposed ANS Standard ANS-5.1 (ANSI N18.6) agree with the measurements within a few percent.
