検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

再処理施設における経年変化研究,1; 硝酸加熱沸騰部におけるステンレス鋼の長期腐食進展

Study on ageing behavior of reprocessing plants, 1; Long term corrosion of stainless steel in boiling nitric acid at heating portion

上野 文義  ; 加藤 千明   ; 本岡 隆文; 山本 正弘 ; 内山 軍蔵 ; 野島 康夫*; 藤根 幸雄*

Ueno, Fumiyoshi; Kato, Chiaki; Motooka, Takafumi; Yamamoto, Masahiro; Uchiyama, Gunzo; Nojima, Yasuo*; Fujine, Sachio*

再処理施設の経年変化に関する基礎データ取得のため、ステンレス鋼製機器の硝酸加熱沸騰部を対象に、実験室規模での長期間のコールド模擬腐食試験を実施した。最長約8,000時間の伝熱面の腐食試験を行った結果、V及びRu添加により実機相当及び3倍程度の腐食加速データが得られること、腐食速度は数千時間後におおむね一定となることがわかった。以上から、ステンレス鋼製機器では、粒界腐食を伴う減肉が生じて一定の腐食速度で進展するが、著しく減肉した場合には腐食速度が加速する可能性があると考えられる。

Long term corrosion of stainless steel in boiling nitric acid solution at heating portion of dissolver and concentrator was studied to investigate ageing behavior of the components in spent fuel reprocessing plant. Corrosion tests carried out more than 8,000 hours in test duration using simulated test solutions including non-radioactive V and Ru ions. As the result, several simulated corrosion data which were equivalent and accelerated about three times of corrosion rate in comparison with actual components were obtained. And it was considered that loss of thickness caused by intergranular corrosion increases as approximately constant rate in stainless steel components but acceleration of corrosion could be observed in the case of remarkable loss of thickness.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.