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Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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Latest News
Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
Ser Gi Hong, Nam Zin Cho
Nuclear Science and Engineering | Volume 132 | Number 1 | May 1999 | Pages 65-77
Technical Paper | doi.org/10.13182/NSE99-A2049
Articles are hosted by Taylor and Francis Online.
A new transport theory method of characteristic direction probabilities (CDP), which can treat complicated geometries with computational efficiency, is presented. In the method, the entire problem is divided into subsystems or cells that are further subdivided into finer mesh regions (i.e., computational meshes). Within a subsystem or cell, the fine meshes are coupled by the directional transmission and collision probabilities for each characteristic direction. In other words, all fine meshes in a subsystem are not coupled together but only the fine meshes along the characteristic line are coupled for each direction. This is in contrast to the traditional collision probability methods (CPMs). To calculate the directional probabilities, ray tracing with the macroband concept is performed only on each subsystem type. To couple the subsystems, the angular flux (not the current as in the interface current method) on the interface between the adjacent subsystems is used. Therefore, the method combines the most desirable features of the discrete ordinates methods and those of the integral transport methods. To verify CDP, it is applied to two benchmark problems that consist of complex meshes and is compared with other methods (CPM, method of characteristics, and Monte Carlo method). The results show that CDP gives accurate results with short computing time.