INTERGRANULAR STRESS-CORROSION CRACKING SUSCEPTIBILITY OF SENSITIZED TYPE-304 STEEL IN 561 K PURE WATER UNDER GAMMA-RAY IRRADIATION

Authors
NAKATA K SHIMANUKI S ANZAI H KUNIYA J
Citation
K. Nakata et al., INTERGRANULAR STRESS-CORROSION CRACKING SUSCEPTIBILITY OF SENSITIZED TYPE-304 STEEL IN 561 K PURE WATER UNDER GAMMA-RAY IRRADIATION, Nuclear Engineering and Design, 153(1), 1994, pp. 35-41
Citations number
16
Categorie Soggetti
Nuclear Sciences & Tecnology
Journal title
Nuclear Engineering and Design → ACNP
ISSN journal
00295493
Volume
153
Issue
1
Year of publication
1994
Pages
35 - 41
Database
ISI
SICI code
0029-5493(1994)153:1<35:ISCSOS>2.0.ZU;2-1
Abstract
Intergranular stress corrosion cracking (IGSCC) of sensitized type 304 stainless steel has been investigated in 561 K water under gamma-ray irradiation at a flux of 2.6 x 10(3) C kg(-1) h(-1) by slow-strain-rat e tensile tests. The IGSCC susceptibility was enhanced by gamma-ray ir radiation in water containing 8 ppm dissolved oxygen (DO). The DO depe ndence of the IGSCC susceptibility was observed in the water under gam ma-irradiation. Although slight IGSCC susceptibility was observed even in deaerated water (less than 1 ppb DO) under gamma-ray irradiation, the susceptibility was completely suppressed by injection of hydrogen into the water. The enhancement of IGSCC susceptibility seems to be re lated to the formation of H2O2 in high temperature water by radiolysis under gamma-ray irradiation and the H2O2 formation rate is markedly d ecreased by hydrogen injection.