A short analysis of new nuclear data evaluations and their impact on nuclear responses in fusion structural materials

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Current emphasis in the design of fusion reactor systems entails meeting the objective of having radiation resistant materials with low-activation characteristics. Therefore, the reactors will have a long usable lifetime and, once they are decommissioned, these facilities will not present serious waste-disposal problems due to the presence of long-lived radioactive byproducts generated in the high-neutron-intensity environments encountered during their operation. A reliable estimation of the performance of a fusion reactor in this context requires accurate knowledge of half lives and neutron-reaction cross sections. A large number of materials, reactions, and radioactive byproducts must be considered. For the most part, the ... continued below

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9 p.

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Gomes, I.C.; Smith, D.L. & Cheng, E.T. August 1, 1998.

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Current emphasis in the design of fusion reactor systems entails meeting the objective of having radiation resistant materials with low-activation characteristics. Therefore, the reactors will have a long usable lifetime and, once they are decommissioned, these facilities will not present serious waste-disposal problems due to the presence of long-lived radioactive byproducts generated in the high-neutron-intensity environments encountered during their operation. A reliable estimation of the performance of a fusion reactor in this context requires accurate knowledge of half lives and neutron-reaction cross sections. A large number of materials, reactions, and radioactive byproducts must be considered. For the most part, the half lives of the radioactive species involved are reasonably well known. Therefore, the main emphasis in improving of the data base needs to be in the area of cross sections. This paper focuses on only two nuclear data issues concerning recent evaluations of cross sections: hydrogen production in vanadium from the {sup 51}V(n,p){sup 51}Ti and {sup 51}V(n,np+d){sup 50}Ti reactions and the production of 7.4 e + 05 y {sup 26}Al (a major waste-disposal concern). Al-26 can be generated mainly by the {sup 27}Al(n,2n){sup 26}Al, and {sup 28}Si(n,np+d){sup 27}Al(n,2n){sup 26}Al reaction processes. The current status and quality of the evaluated cross sections related to these nuclear-reaction processes is examined and the impact on generation of hydrogen gas and {sup 26}Al radioactive in fusion reactors is assessed in the present study.

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9 p.

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INIS; OSTI as DE98057950

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  • Annual meeting of the American Nuclear Society, Nashville, TN (United States), 7-12 Jun 1998

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  • Other: DE98057950
  • Report No.: ANL/TD/CP--96897
  • Report No.: CONF-980606--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 674739
  • Archival Resource Key: ark:/67531/metadc704594

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  • August 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Dec. 15, 2015, 12:31 p.m.

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Gomes, I.C.; Smith, D.L. & Cheng, E.T. A short analysis of new nuclear data evaluations and their impact on nuclear responses in fusion structural materials, article, August 1, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc704594/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.