Investigation of cryogenic irradiation influence on mechanical and physical properties of ITER magnetic system insulation materials

• Published in: Journal of nuclear materials Vol. 258; pp. 1878 - 1883
• Main Authors: Kozlov, A.V, Scherbacov, E.N, Dudchenko, N.A, Shihalev, V.S, Bedin, V.V, Paltusov, N.A, Korsunskiy, V.E
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.1998
• Subjects: G01; R03; N01; R04
• ISSN: 0022-3115; 1873-4820
• DOI: 10.1016/S0022-3115(98)00413-9

A set of methods of cryogenic irradiation influence test on mechanical and physical properties of insulation of ITER magnetic system are presented in this paper. Investigations are carried out without intermediate warming up of samples. A Russian insulating composite material was irradiated in the IVV-2M Reactor. The ratio of energy absorbed by insulation materials from neutron irradiation to that from gamma irradiation can be varied from ∼(25:75) % to ∼(50:50) % in the Reactor. The test results on the thermal expansion, thermal conductivity and gas evolution of the above material are presented. It was shown, that cryogenic irradiation up to the fluence ∼2 × 10 22 n/m 2 ( E⩾0.1 MeV) leads to 0.27% linear size changes along layers of fiber-glass, the thermal conductivity coefficient is decreased on 15% at 100 k in perpendicular direction to fiber-glass plane, and thermal coefficient of linear expansion (TCLE) has anomalous temperature dependence.