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Duke partnering with Amazon, Google, Microsoft, Nucor on energy security
Duke Energy announced agreements yesterday with Amazon, Google, Microsoft, and Nucor to accelerate clean energy deployments in the Carolinas through a new rate structure proposal.
The company signed memoradums of understanding this month that include proposed Accelerating Clean Energy (ACE) tariffs that would help offset the long-term costs of investing in clean energy technologies, such as new nuclear and energy storage, through early commitments. Duke announced its partnership with the tech and utility giants at this week’s White House Summit on Domestic Nuclear Deployment aimed at strengthening the U.S. nuclear industry.
T. Matsumura
Nuclear Science and Engineering | Volume 183 | Number 3 | July 2016 | Pages 407-420
Technical Paper | doi.org/10.13182/NSE15-86
Articles are hosted by Taylor and Francis Online.
The neutron escape probability from a rectangular cell is investigated for the collision probability method. Since the numerical calculation of the escape probability requires multiple integrations, resulting in a long computing time, semianalytical approximation of the multiple integrations is proposed to reduce the computing time. By approximating the result of integration in the z-direction by a polynomial expression divided into ranges, it is possible to perform the integrations in the x- and y-directions analytically. The computing time of the present semianalytical approximation is reduced by one to two orders of magnitude compared with that required for the conventional numerical integration. Moreover, a lookup escape probability table for rectangular cells calculated using the semianalytical approximation enables the calculation of the escape probability for an arbitrary rectangle with a much shorter computing time and practical precision (<0.1% error). In addition, a method of applying the semianalytical approximation and a lookup table to the collision probability calculation for an x-y geometry is discussed.