60Co PRODUCTION IN BN-350 REACTORS A. V. Zvonarev, V. V. Korobeinikov, I. P. Matveenko, I. R. Suslov, Yu. S. Khomyakov, A. M. Tsibulya, V. I. Chernyi, V. S. Shkol'nik, V. P. Netsvet, N. V. Skorikov, A. I. Zinov'ev,