Graphite materials radiation size changes and criterion of their work capability

Changes of graphites physical properties (porosity, strength, elasticity modulus, sizes changes) and their interconnection after irradiation in 320-1500 K temperature range and fluence up to 1,6x1022 n/cm2 (E > 0.18 MeV) are considered. It is shown that in the range of intensive graphite samples size growth an increase of porosity takes place and strength deterioration as a consequence occurs. A criterion of graphite workability is proposed which includes the relation between strength limits under compressing and bending