Evaluation of delayed neutron data for JENDL-3.3

Tadashi Yoshida*, Shigeaki Okajima, Takeshi Sakurai, Ken Nakajima, Tsuyoshi Yamane, Jun Ichi Katakura, Yoshihisa Tahara, Atushi Zukeran, Kazuhiro Oyamatsu, Takaaki Ohsawa, Tsuneo Nakagawa, Takahiro Tachibana


研究成果: Article査読

6 被引用数 (Scopus)


Delayed neutron data of 235U, 238U and 239Pu have been evaluated and recommended for JENDL-3.3. Adjustment of Vd was carried out on the basis of the ßeff measurements at FCA, MASURCA and TCA using the JENDL-3.2 data as the initial guess. Through this adjustment the vd value for 238U below 3.5 MeV was decreased by about 3% from 0.0481 to 0.0466. The vd values of 235U and 239Pu were also determined in this way. Further appropriate six group constants, the decay constants A¿ and the group yields αi, were determined from experimental data of the delayed neutron emission rates, which were collected and compiled by Spriggs through the SG6 activity of WPEC. Applicability of the resultant group constants was validated through the analyses of the reactivity measurements based on the period or the rod-drop methods.

ジャーナルJournal of Nuclear Science and Technology
出版ステータスPublished - 2002

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学


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