Toward the fourth version of Japanese Evaluated Nuclear Data Library (JENDL-4)

Shibata, Keiichi; Iwamoto, Osamu  ; Ichihara, Akira ; Iwamoto, Nobuyuki  ; Kunieda, Satoshi  ; Otsuka, Naohiko*; Fukahori, Tokio  ; Nakagawa, Tsuneo; Katakura, Junichi

Evaluated nuclear data play an important role in nuclear engineering. After we released the first version of Japanese Evaluated Nuclear Data Library JENDL-1 about 30 years ago, JENDL has been revised several times by considering the feedback from users and recent experimental data. JENDL-3.3, which was released in 2002, is being used in various fields, and its reliability has been confirmed. We are developing JENDL-4 for innovative reactors with much emphasis on the improvements of FP and MA data. Nuclear model codes were developed. The actinide data were already released as JENDL Actinoid File 2008. The complete library JENDL-4 will be made available in FY2009.