Channels for irradiation and pneumotransport system at IBR-2

The pulsed reactor IBR-2 is supplied with 5 channels ofor sample irradiation, two of which are intended mainly for activation analysis. The mean values of the thermal flux density and epithermal neutrons in the 1 channel are (1.1+-0.14)x1012 and (0.23+-0.03)x1012 n/(cm2xs), respectively. The 3, 4, and 5 channels are intended for radiational investigations and production of radioactive isotopes. The neutron spectra in the 4, 5 channels are similar to that in the 1 one, and the neutron spectrum in the 3 channel installed in the centre of the reactor active core is similar to the neutron spectrum of fission, the mean neutron flux density being 180x1012 n/(cm2xs). The principal units of the pneumatic system ''Regata'' are described and the results of the elementary analysis of human hair are presented for illustration