Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-27 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-17-1 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-3 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-9-1 Neutron radiation source Fast neutron source closed plutonium-beryllium IBN-10 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-5 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-14-5 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-12 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-14 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-18 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-26 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-7 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-8-8 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-16-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-21 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-23 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-18-3 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-19-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-14-6 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-157 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-10-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-17 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-15-4 Neutron radiation source Fast neutron source closed plutonium-beryllium 241-B1-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-13 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-9 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-8 Neutron radiation source Sealed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-4 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-15-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-19 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-11 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-6 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-B-1 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-12-1 FSUE PO Mayak Russia Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-13-1 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-B-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-17-3 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-9 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-4-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-22 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-556 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-15-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-6 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-K-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-10-2 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-19-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-5-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-2-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-14-4 Neutron radiation source Closed plutonium-beryllium fast neutron source with plutonium-238 radionuclide IBN-8-156 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-7-1 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-16 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-15-3 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-5 Neutron radiation source Closed plutonium-beryllium fast neutron source IBN-241-B-3 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-4 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-14-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-20 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-241-17-2 Neutron radiation source Fast neutron source Closed plutonium-beryllium IBN-28