[en] Influence of neutron irradiation on radiation swelling of aluminum alloys of two types 97.8Al+0.9Mg+0.8Cu and 96.8Al+2.4Mg+0.3Cu was studied. The samples have the right forms of parallelepiped, cylinder and disk. The samples were irradiated with fast neutrons in vertical channels of WWR-SM research reactor of INP AS RU (fluences of 1.3x10"1"8, 1.5x10"1"9and 1.2x10"2"0 n/cm"2). It was discovered that irradiation leads to the change in linear dimensions of samples and corresponding radiation swelling. Changing relative volume of samples has been calculated and concentration of excess vacancies, generated by fast neutrons, has been estimated. Mechanism limiting maximal size of pores in irradiated samples conditioned by surface tension has been offered. In wide range of fluences of fast neutrons superlinear dependence of sample swelling on dose has been observed. The observed deviation from linear dependence could be caused by contribution of interstitial atoms. (authors)