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Journal Articles

Validation of radioactivity calculation code system DCHAIN-SP

Kai, Tetsuya; Maekawa, Fujio; Kasugai, Yoshimi; Niita, Koji*; Takada, Hiroshi; Meigo, Shinichiro; Ikeda, Yujiro

Proceedings of ICANS-XVI, Volume 3, p.1041 - 1049, 2003/07

A radioactivity calculation code system DCHAIN-SP was validated in view of the following points: (1) Activation cross section data library for the energy region below 20 MeV. (2) NMTC/JAM code for calculation of the nuclide yield induced by the high energy particles above 20 MeV. (3) DCHAIN-SP code system which treats overall nuclide yield by the high energy particles. 42 of activation cross sections and 22 tritium production cross sections were revised so that the DCHAIN-SP calculation could improve its accuracy within 30% for typical materials irradiated by 14-MeV neutrons. The NMTC/JAM code was improved to implement the GEM model for better estimation of light fragment production. Accuracy of the nuclide yield for proton induced reactions in 10 MeV - 10 GeV still remains in the level of a factor of 2 to 3. The DCHAIN-SP code system was employed for the analysis of time evolution of the radioactivity produced in the samples on a thick mercury target bombarded with 2.83 and 24 GeV protons. It is found that the code system agrees with the measured data by a factor of 2 to 3.

Journal Articles

Measurement of activation cross sections for mercury isotopes in the neutron energy range between 13.4 and 14.9MeV

Kasugai, Yoshimi; Maekawa, Fujio; Ikeda, Yujiro; Takeuchi, Hiroshi

Journal of Nuclear Science and Technology, 38(12), p.1048 - 1056, 2001/12

https://doi.org/10.3327/jnst.38.1048

Activation cross sections for mercury isotopes have been measured at neutron energy between 13.4 and 14.9 MeV by means of the activation method using Fusion Neutronics Source (FNS) at Japan Atomic Energy Research Institute (JAERI). Measured cross sections are $$^{196}$$Hg(n, 2n)$$^{195m,g}$$Hg, $$^{198}$$Hg(n, 2n)$$^{197m,g}$$Hg, $$^{198}$$Hg(n, p)$$^{198g}$$Au, $$^{199}$$Hg(n, p)$$^{199}$$Au, $$^{200}$$Hg(n, p)$$^{200m,g}$$Au, $$^{201}$$Hg(n, p)$$^{201}$$Au, $$^{202}$$Hg(n, p)$$^{202}$$Au, $$^{204}$$Hg(n, 2n)$$^{203}$$Hg and $$^{204}$$Hg(n, p)$$^{204}$$Au. The cross sections of the $$^{202}$$Hg(n, p)$$^{202}$$Au and $$^{204}$$Hg(n, p)$$^{204}$$Au reactions were measured for the first time. For the $$^{196}$$Hg(n, 2n)$$^{195m,g}$$Hg, $$^{198}$$Hg(n, 2n)$$^{197m,g}$$Hg, $$^{198}$$Hg(n, p)$$^{198g}$$Au and $$^{199}$$Hg(n, p)$$^{199}$$Au reactions, the cross sections at plural neutron energies were measured for the first time. The present data were compared with the experimental data reported previously and the recent evaluations, and it was shown that some evaluations need to be improved.

JAEA Reports

Decay heat experiment and validation of calculation code systems for fusion reactor

Maekawa, Fujio; Wada, Masayuki*; Ikeda, Yujiro

JAERI-Research 99-055, p.188 - 0, 1999/10

JAERI-Research-99-055.pdf:8.59MB

no abstracts in English

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