SiC coating as hydrogen permeation reduction and oxidation resistance for nuclear fuel cladding

被引：73

作者：

Usui, Takahiro ^{[1
,2
]}

Sawada, Akihiko ^{[2
]}

Amaya, Masaki ^{[2
]}

Suzuki, Akihiro ^{[1
]}

Chikada, Takumi ^{[3
]}

Terai, Takayuki ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

[2] Japan Atom Energy Agcy, Nucl Safety Res Ctr, Tokai, Ibaraki 3191195, Japan

[3] Shizuoka Univ, Grad Sch Sci, Suruga Ku, Shizuoka 4228529, Japan

来源：

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2015年 / 52卷 / 10期

关键词：

hydrogen permeation; SiC; LOCA; coating; oxidation; fuel cladding; COMPOSITES; ZIRCALOY-4;

D O I：

10.1080/00223131.2015.1020901

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Silicon carbide (SiC) coating is one of the countermeasures for the prevention of oxidation and hydrogen embrittlement of fuel claddings because SiC has high resistance of oxidation and hydrogen permeation. Hydrogen permeation and oxidation experiments for the cladding materials with SiC coatings were conducted in unirradiated conditions. The sputtering method was employed to make SiC coatings. In the hydrogen permeation experiment, 316 type of stainless steel (SS316) was used as a base material of the coating. SS316 with SiC coatings showed hydrogen permeation reduction by one order of magnitude. In the oxidation experiments, Zircaloy 4 (Zry-4) and SS316 were used as base materials of the coatings. The weight gain of the Zry-4 specimens with a SiC coating decreased by about one-fifth compared to the uncoated ones at 750 degrees C and 1200 degrees C. This phenomenon was observed for SS316 at 750 degrees C as well. The peel-off of the coating was observed in several experiments, and it is considered that the peel-off was caused by the difference of the thermal expansions between coatings and base materials. Thicker coatings showed better oxidation resistance, but thinner coatings showed more tolerance of peel-off.

引用

页码：1318 / 1322

页数：5

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