FAST REACTOR FUEL ELEMENT (VERSIONS) AND THE CAN FOR ITS FABRICATION Russian patent published in 2005 - IPC

FIELD: nuclear engineering.

SUBSTANCE: it is proposed a fast reactor fuel element the can of which is fabricated from a ferritic martensitic steel. The structure of the steel in the can height consists at any rate of two zones. The steel structure in the upper zone of the fuel element can ensured its increased high-temperature strength, and in its lower zone-increased resistance to low-temperature radiation embrittlement at the following ratio of components (mass %):C 0.10-0.21; Si 0.1-0.8; Mn 0.5-2.0; Cr 10.0-13.5; W 0.8-2.5; V 0.05-0.4; Ti 0.03-0.3; B 0.001-0.008; Ce and/or Yt 0.001-0.10; Zn 0.05-0.2; Ta 0.005-0.2; N 0.02-0.15; Fe the rests at the ratio of the total content of V, Ti, Zr and Ta to the total content of C and N in the range from 2 to 9.

EFFECT: the result of invention is creation of the fuel element and can for its fabrication from the steel with low level of induced radioactivity and its more last decrease after neutron irradiation high level of the embrittlement resistance in the temperature range of 270-400°C under conditions of neutron irradiation and high level of high-temperature strength at temperatures to 700°C.

6 cl, 4 tbl