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Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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NRC wants input on Hermes 2 test reactor construction permit
The Nuclear Regulatory Commission is seeking input on its draft environmental assessment and draft finding of no significant impact for Kairos Power’s application to build the Hermes 2 test reactor facility in Oak Ridge, Tenn.
Ryan G. McClarren, James Paul Holloway
Nuclear Science and Engineering | Volume 159 | Number 3 | July 2008 | Pages 330-337
Technical Note | doi.org/10.13182/NSE159-330
Articles are hosted by Taylor and Francis Online.
We present an extension of our quasi-linear numerical method for the time-dependent spherical harmonics (Pn) equations. The extension involves adding time integration that is higher order than backward Euler, yet avoids artificial oscillations in the solution. This new approach mimics that of our previously presented quasi-linear spatial scheme in that we use a first-order step to determine in which parts of the problem we can use a high-order method. The first-order scheme we use for time integration is backward Euler, and the high-order method we implement is Crank-Nicolson. Results are presented that demonstrate the effectiveness and necessity of this approach.