Hydrogen permeability of reactor steels

UDC 669.788 The hydrogen permeability of 12Kh18N10Т, 316SS, and 10Kh9VFА reactor steels and EP-838 and Kh12G20V alloyed chrome-manganese steels is studied in the intact state, after thermal treatment, alloying, application of protective coatings, oxidation, irradiation with H + ions, and in the presence of welded joints. We compute the permeation of hydrogen P c corresponding to the ecologically safe level of losses of tritium through the reactor equipment into the environment and show how the changes in the structure and modification of the surface agree with this value. The permeability and solubility of hydrogen in welded joints of the investigated steels are determined.