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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
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NRC issues interim guidance on reactor component disposal
The Nuclear Regulatory Commission is providing guidance to nuclear power plant licensees looking to use decommissioning trust fund (DTF) money to dispose of major reactor components like steam generators and reactor vessel heads while the plant is still operational.
On August 5, the NRC issued the interim staff guidance Use of the Decommissioning Trust Fund During Operations for Major Radioactive Component Disposal (REFS-ISG-2024-01), which provides the NRC staff’s regulatory position regarding the use a reactor’s DTF for the disposal of major radioactive components while the plant is still operational. Under NRC regulations, the DTF may be accessed solely for decommissioning expenses as defined in 10 CFR 50.2, unless an exemption is granted by the NRC.
Peter J. Millett, James M. Fenton
Nuclear Technology | Volume 108 | Number 2 | November 1994 | Pages 256-265
Technical Paper | Material | doi.org/10.13182/NT94-A35033
Articles are hosted by Taylor and Francis Online.
A detailed model of the transport processes that produce concentrated solutions locally in pressurized water reactor steam generators has been developed. The model describes the heat, mass, and momentum transfer processes that occur in porous deposits such as those found in tube support and tubesheet crevices and in the sludge pile on top of the tubesheet. The model is used to predict the concentration of a species in the pore solution as a function of time and at steady state, and the model predictions are compared to available experimental data. Several parametric studies were performed with the model to identify important design and operating parameters.