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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.
Toshikazu Takeda, Yuichiro Kanayama
Nuclear Science and Engineering | Volume 131 | Number 3 | March 1999 | Pages 401-410
Technical Paper | doi.org/10.13182/NSE99-A2042
Articles are hosted by Taylor and Francis Online.
The multiband method has been extended to treat the resonance interference effect between two nuclides based on the intermediate resonance approximation. The integral equation of the flux belonging to different bands of the two nuclides is derived for a heterogeneous cell system. In the equation, a new band parameter is introduced. The new parameter denotes the conditional probability that a nuclide takes a certain band under the condition that the other nuclide takes another band. The calculational procedure of band parameters is described in a homogeneous medium. This method has been applied to a homogeneous medium and a thermal reactor cell containing 235U and 238U. The effective cross sections calculated by this method and the conventional multiband method without considering the interference effect are compared with the results by a reference continuous-energy Monte Carlo method. It is seen that the conventional multiband method greatly overestimates the fission and capture cross sections of 235U for energy groups where there are both resonances of 235U and 238U, and the present method remarkably improves the overestimation.