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論文
600 合金のPWR 一次系水中で形成される酸化皮膜と応力腐食割れ初生に及ぼす溶存水素濃度の影響
著者:
三菱重工業株式会社 小林 高揚, Takaaki KOBAYASHI, 杉野 亘, Wataru SUGINO, 橋本 篤, Atsushi HASHIMOTO
発刊日:
公開日:
This study focused on an initial stage of PWSCC, observed and considered the oxide layer on alloy 600 using three-point bending specimens immersed in 360 °C・30 ml/kg DH and 345 °C・15 ml/kg DH. Crevasses of oxide film along grain boundaries were observed on their surfaces. These conditions are close to chemical equilibrium boundary of Ni/NiO, inhibit the growth of the oxide film on grain boundaries due to lack of oxidizable-Ni and Cr. There is a possibility that their material surfaces in vicinity of grain b...
英字タイトル:
Effect of Dissolved Hydrogen For Oxide Film And Initiating Stress Corrosion Cracking Of Alloy 600 In PWR Primary Water
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論文
円筒タンクに作用する津波波力の評価手法について
著者:
池末 俊一, Shunichi IKESUE, 平井 孝昌, Takamasa HIRAI, 熊谷 直己, Naoki KUMAGAI, 羽田野 琢磨, Takuma HADANO, 仲村 岳, Gaku NAKAMURA, 戸井田 隆行, Takayuki TOITA, 木原 直人, Naoto KIHARA
発刊日:
公開日:
Asakura's method is well known as the evaluation method of tsunami wave force. In this method, tsunami wave force is evaluated on the assumption that the inundation depth increases by 3 times in front of a structure. On the other hands, inundation depth is not constant around a cylindrical tank. Therefore, there is the possibility that the tsunami wave force of a cylindrical tank is overestimated by Asakura's method. In this paper, Sano's method is introduced as the evaluation method of tsunami wave force a...
英字タイトル:
Evaluation Method of Tsunami Wave Force Acting on Cylindrical Tank
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論文
再処理施設におけるジルコニウムの応力腐食割れ評価に関する考察
著者:
原子力規制庁長官官房 橋倉 靖明, Yasuaki HASHIKURA, 石島 暖大, Yasuhiro ISHIJIMA, 中原 将海, Masaumi NAKAHARA, 佐野 雄一, Yuichi SANO, 上野 文義, Fumiyoshi UENO, 阿部 仁, Hitoshi ABE
発刊日:
公開日:
For the aging of fuel reprocessing facilities, constant load tensile tests with controlled potentials and electrochemical tests for zirconium were conducted in nitric acid and sodium nitrate solutions. Consequently, information was obtained regarding the effects of nitric acid and nitrate ion concentrations on the stress corrosion-cracking initiation and effects of nitric acid and plutonium concentrations in solutions, along with the liquid temperature on natural potential. Based on the test results, a map ...
英字タイトル:
Consideration on Stress Corrosion Cracking Evaluation of Zirconium for Fuel Reprocessing Facilities
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論文
球圧子押込み試験による鉄鋼材料の機械的性質推定法の高精度化
著者:
大阪大学 岡野成威, Shigetaka OKANO, 望月 正人, Masahito MOCHIZUKI
発刊日:
公開日:
This study presents an advanced method to estimate mechanical properties of structural steels through the instrumented indentation techniques using spherical indenter. Finite element analysis model of instrumented indentation testing was constructed to investigate the effect of stress.strain curve of materials on the indentation load.depth curve and the indentation contact radius. From calculation results, new estimation formulae for the representative stress and stain relations were established. Meanwhile,...
英字タイトル:
An Advanced Method to Estimate Mechanical Properties of Structural Steels through Instrumented Spherical Indentation Techniques