Retention of deuterium in damaged low-activation steel Rusfer (EK-181) after gas and plasma exposure

The hydrogen isotope retention properties of the damaged and undamaged material were investigated by exposure to deuterium gas several weeks after damaging. The deuterium retention was investigated in the temperature range of RT-773 K at pressure 104 Pa. Deuterium depth profiles were measured a month after gas exposure by nuclear reaction analysis (NRA) using the D(3He,p)α nuclear reaction. Deuterium retention in damaged and undamaged Rusfer in the temperature range of 300-600 K has a maximum at 500 K for all types of damage investigated. The typical value of deuterium concentration in the bulk is 10−3 at.%. Peculiarities of D retention in damaged samples are discussed.