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Former Exelon CEO Chris Crane remembered for “transformational milestones”
Crane
Exelon announced that Chris Crane, the company’s former chief executive, passed away on Saturday in Chicago at the age of 65.
Crane served as the company’s president and CEO from 2012 until his retirement in December 2022. During his tenure, he steered the energy company through several transformational milestones, including the successful mergers with Constellation Energy in 2012 and Pepco Holdings in 2016, creating the largest utility business by customer count in the United States.
In 2022, with the spin-off of Constellation as the generation and retail side of energy business (with the largest U.S. nuclear fleet), Crane led the creation of a stand-alone transmission and delivery energy company.
T. A. Germogenova
Nuclear Science and Engineering | Volume 124 | Number 1 | September 1996 | Pages 63-71
Technical Paper | doi.org/10.13182/NSE96-A24223
Articles are hosted by Taylor and Francis Online.
The analytical representation of eigenfunctions for finite moments method approximations of radiative transport equations is constructed in slab geometry problems. The truncated balance algorithm is used. An angle dependence of discrete eigenfunctions is determined by discrete characteristic equation solutions. It is established that space-dependent factors of discrete eigenfunctions are Pade approximations of the exponential functions and correspond to the original transport problem eigenfunctions. This technique proves to be useful for analyzing solvability and accuracy of finite moment approximations and also for developing computational algorithms. Slowly changing eigenfunctions are included in the regular component of the optically thick slab problem solution. Coarse-mesh algorithms or diffusion approximations at specific boundary conditions can be used to determine these components. Other eigenfunctions determine the singular component of the mesh solution. This component represents the transition regime on coarse meshes with typical oscillations or with a slow decrease in boundary layers. It is strongly different from the singular component of the exact solution.