Using probabilistic methods for solving the problem of ensuring leak tightness of heat exchanger tubes of nuclear power plant steam generators - Probabilistic Safety Assessment for Optimum Nuclear Power Plant Life Management (PLiM) - page 283

b
a
9.7 The pipe section (60-96) between spacing grids 2 and 3
(a) and the microstructure of a pit with a crack in the transverse
microsection, x100 (b).
a
￿ ￿ ￿ ￿ ￿
b
9.8 The microstructure of sediments and through defects on
the outer surface of the tube, ×100: a) section of a tube (60-102)
below spacing grid 3, a general view, b) the zone with the crack.