Activities on covariance estimation in Japanese Nuclear Data Committee Shibata, Keiichi [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment] 66 PHYSICS; URANIUM 235 TARGET; THERMAL FISSION; DATA COVARIANCES; NUCLEAR DATA COLLECTIONS; JAERI; K CODES; PLUTONIUM 239 TARGET; PLUTONIUM 240 TARGET; OPTICAL MODELS; NEUTRON REACTIONS Described are activities on covariance estimation in the Japanese Nuclear Data Committee. Covariances are obtained from measurements by using the least-squares methods. A simultaneous evaluation was performed to deduce covariances of fission cross sections of U and Pu isotopes. A code system, KALMAN, is used to estimate covariances of nuclear model calculations from uncertainties in model parameters. (author) Japan Atomic Energy Research Inst., Tokyo (Japan) OSTI as DE97758662 Japan 1997-03-01 English Conference Conference: 1996 symposium on nuclear data, Tokai (Japan), 21-22 Nov 1996; Other Information: PBD: Mar 1997; Related Information: Is Part Of Proceedings of the 1996 symposium on nuclear data; Iguchi, Tetsuo [Nagoya Univ. (Japan)]; Fukahori, Tokio [eds.]; PB: 332 p. Medium: X; Size: pp. 102-107 https://doi.org/ ON: DE97758662 [] JAERI-Conf-97-005; CONF-9611184-; INDC(JPN)-179/U Other: ON: DE97758662; TRN: JP9709090 JPN; SCA: 663430; PA: JPN-97:009090; EDB-97:147391; SN: 97001866993 2008-02-05 544677 https://www.osti.gov/etdeweb/servlets/purl/544677