TY - GEN
T1 - INVESTIGATIONS OF THE DUAL BENEFITS OF ZINC INJECTION ON COBALT-60 UPTAKE AND OXIDE FILM FORMATION UNDER BOILING WATER REACTOR CONDITIONS
AU - Holdsworth, Samuel
AU - Scenini, Fabio
AU - Burke, M. Grace
AU - Ito, Tsuyoshi
AU - Wada, Yoichi
AU - Hosokawa, Hideyuki
AU - Ota, Nobuyuki
AU - Nagase, Makoto
PY - 2017
Y1 - 2017
N2 - Zinc injection in reactor feed water is a well-known mitigation strategy for prevention of radioactive 60Co deposition in both Boiling and Pressurised water reactors. Furthermore, zinc leads to the formation of a thinner, more stable oxides arising from the thermodynamically driven replacement of Ni and Fe in the characteristic spinel type oxide formed on stainless steel. However, the interaction of zinc on the oxide formation under different water chemistries is not fully understood. Oxidation tests on type 316 stainless steel were performed under both hydrogen chemistry conditions (HWC) with and without zinc injection and the resultant oxides analysed using analytical electron microscopy (AEM), field emission gun scanning electron microscopy (FEG-SEM), and energy dispersive X-ray spectroscopy (EDXS). The present work identifies and quantifies the positive microstructural changes that Zn has on the oxide formation on a #600 grit surface and an OPS polished 316 SS surface under boiling water reactor (BWR) conditions.
AB - Zinc injection in reactor feed water is a well-known mitigation strategy for prevention of radioactive 60Co deposition in both Boiling and Pressurised water reactors. Furthermore, zinc leads to the formation of a thinner, more stable oxides arising from the thermodynamically driven replacement of Ni and Fe in the characteristic spinel type oxide formed on stainless steel. However, the interaction of zinc on the oxide formation under different water chemistries is not fully understood. Oxidation tests on type 316 stainless steel were performed under both hydrogen chemistry conditions (HWC) with and without zinc injection and the resultant oxides analysed using analytical electron microscopy (AEM), field emission gun scanning electron microscopy (FEG-SEM), and energy dispersive X-ray spectroscopy (EDXS). The present work identifies and quantifies the positive microstructural changes that Zn has on the oxide formation on a #600 grit surface and an OPS polished 316 SS surface under boiling water reactor (BWR) conditions.
U2 - 10.1007/978-3-319-68454-3_36
DO - 10.1007/978-3-319-68454-3_36
M3 - Conference contribution
BT - 18th International Conference on Environmental Degradation in Nuclear Power Systems
ER -