111件が見つかりました。

並び替え
第11回
BWR 環境で長期使用されたステンレス鋳鋼のミクロ組織
著者:
澤部 孝史,Takashi SAWABE,土肥 謙次,Kenji DOHI,野本 明義,Akiyoshi NOMOTO,新井 拓,Taku ARAI
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Microstructure in a cast stainless steel used for a PLR pump casing cover in a BWR was investigated by atom probe tomography and nanoindentation testing. Ferrite phase decomposition and G-phase precipitation were no t observed in the as-received PLRP casing cover. Thermal aging and solution treatment were carried out on the as-received PLRP casing cover and an unused model alloy of cast stainless steel. The ferrite phase decomp osition and G-phase precipitates in the thermal aged model alloy disappeared af...
英字タイトル:
Microstructure in cast stainless steel used for long-term in BWR environment
第11回
BWR環境におけるステンレス鋳鋼の熱時効評価
著者:
田中 重彰,Shigeaki TANAKA,平本 真紀,Maki HIRAMOTO,西山 俊明,Toshiaki NISHIYAMA,中川 純二,Junji NAKAGAWA,塩田 翔,Sho SHIODA,宮田 肇,Hajime MIYATA,豊田 哲也,Tetsuya TOYOTA,杉山 正成,Masanari SUGIYAMA
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Effect of thermal aging under BWR condition on material properties of casting s tainless steel were evaluated by such as Charpy impact test, using replaced BWR omponent material. Solution heat treatment was performed to the same material d the material properties were obtained. Comparing each material test results , impact value of thermal aging material was lower than solution heat treatment material. By the results, thermal aging effect on material properties under BW condition was confirmed. The materi...
英字タイトル:
Thermal Aging Evaluation of Casting Stainless Steel under BWR Environment
第11回
EBR-II 反射体を用いたオーステナイト鋼照射下ミクロ組織検出のための非破壊検査技術構築
著者:
沖田 泰良,Taira OKITA,江藤 淳二,Junji ETOH,松永 嵩,Takashi MATSUNAGA,匂坂 充行,Mitsuyuki SAGISAKA,礒部 仁博,Yoshihiro ISOBE
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Time-of-flight ultrasonic measurements were conducted on a thick hexagonal block of 304 type austenitic stainless steel, which was used as a reflector in EBR-II and was irradiated to 23 ~ 33 dpa at 37 0 ~ 410 ?C. The results of ultrasonic-implied void swelling and carbide-induced densification were compared with those obtained by immersion density measurements and transmission electron microscope o bservations. The three types of measurements were found to agree rather well with each other, and the variati...
英字タイトル:
Development of a non-destructive inspection technique for detecting irradiation-induced microstructural changes of austenitic stainless steels by use of an EBR-II reflector
第11回
EMAT を用いたガイド波送受信機構の解析
著者:
古澤 彰憲,Akinori FURUSAWA,森川 惇,Atsushi MORIKAWA,小島 史男,Fumio KOJIMA
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Abstract This paper is concerned with transmit-receive mechanism of the electromagnetic ultrasonic tran sducer (EMAT) for the guided wave. First, the three-dimensional guided wave propagation simulator is de veloped. This simulator calculates the particle velocity from the force which are excited by EMATs with FDTD method. Second, configuration of EMATs is designed based on our study of the excitation mechanism of an EMAT, in order to transmit and receive the longitudinal mode (L-mode) or the torsional mod...
英字タイトル:
Analysis of transmit-receive mechanism of EMAT for the guided wave
第11回
L モードガイド波による配管減肉の位置と深さ推定..
著者:
中島 大岳,Hirotaka NAKAJIMA,古澤 彰憲,Akinori FURUSAWA,小島 史男,Fumio KOJIMA
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The aim of this work presented here is to demonstrate the method for estimating the pipe wall thinning configuration: location, width, depth of pipe wall thinning in straight pipe based on velocity dispersions of longitudinal guided wave. First, group velocity dispersion curve is derived from frequency equation. Second, group velocity of longitudinal guided wave is analyzed using guided wave simulator for pipe with notch-shaped and ellipse-shaped circular pipe wall thinning. Finally, method for estimat...
英字タイトル:
Estimation of the Pipe Wall Thinning Configuration Based on Velocity Dispersions of Longitudinal Guided Wave
第11回
Molten Core Concrete Interaction and Development of Core Catcher (2) Thermal shock effects for advanced high temperature ceramics
著者:
マルタ シルベスター,Marta ZIEMNICKA-SYLWESTER ,奈良林 直,Tadashi NARABAYASHI ,千葉 豪,Go CHIBA, 辻 雅司,Masashi TSUJI ,久保田 祥,Sho KUBOTA , 宮脇 大地, Daichi MIYAWAKI
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Four monolithic refractory ceramics (Al2O3, SiC, TiC and TiN) were exposed to severe thermal shock caused by thermite reaction. Such experiments were intended to simulate the exposure of a core catcher to hot debris of melted core in nuclear reactor. Moreover, the chemical interactions between tested materials and products of thermite reaction were investigated by holding samples in laboratory furnace for 5 hours at 1000oC in air. None of the materials entirely withstand such sudden temperature rise, o...
英字タイトル:
Molten Core Concrete Interaction and Development of Core Catcher (2) Thermal shock effects for advanced high temperature ceramics
第11回
Ni 基600 合金を対象とした腐食すきま再不動態化電位測定方法の検討
著者:
岩金 弘樹,Hiroki IWAKANE,関口 智大,Tomohiro SEKIGUCHI,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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The method for determining the repassivation potential for corrosion crevice of stainless steel is defined by JIS, but that of Alloy600 is not defined yet. In this paper, the method for determining the repassivation potential was considered based on the experiments with Alloy600 of nuclear constituent material by reference to JIS and intended to contribute to the establishment of it. In preparation for measuring the repassivation potential, the pitting potential dependence of Cl- concentration is measu...
英字タイトル:
Study on the electrochemical method for determining the repassivation potential for corrosion crevice of Alloy600.
第11回
PD 資格試験開始から 8 年の実施状況
著者:
渡辺 恵司,Keiji WATANABE,東海林 一,Hajime SHOHJI,秀 耕一郎,Koichiro HIDE
発刊日:
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The PD Center of Central Research Institute of Electric Power Industry (CRIEPI) commenced Per formance Demonstration examinations for flaw depth sizing of austenitic stainless steel pipes n March 2006. At the end of FY 2013, 40 examination sessions have been completed and 49 cand ates have passed the examination. The total number of tests administered including re-tests and re-certification was 95. It was noted that the final call for the crack length (PD examin ation answer) was adopted the phased array m...
英字タイトル:
Implementation status for eight years after the start of PD qualification examination in Japan
第11回
SPM 法による軸受診断の検証と保全の最適化への展開
著者:
南 明子,Akiko MINAMI,今治 由博,Yoshihiro IMAJI,名波 健,Takeshi NANAMI,谷口 祐司,Yuuji TANIGUCHI
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The maintenance of atomic energy-related facilities has been performed mainly on the vibration method until now. However, for the maintenance in atomic energy-r elated facilities and the fact of the rotary apparatus, it is not enough at all only by the vibration method. We note the SPM method as a technique to watch th e bearing condition in accord with those facts and carried out verification. We wrote about a background of starting this verification, the principle of the SPM method, contents of the verif...
英字タイトル:
Inspection of bearing diagnosis and development to optimization by SPM method
第11回
SUS304L 鋼の局部腐食発生条件および進展継続性評価
著者:
関口 智大,Tomohiro SEKIGUCHI,岩金 弘樹,Hiroki IWAKANE,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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Crevice corrosion has been concerned in the Fukushima Daiichi Nuclear Power Station, since seawater was injected to make up water level as part of the emergency action. To evaluate structural integrity, it is important to inves tigate whether crevice corrosion occurred. The purpose of this study is to investigate conditions of crevice corrosion initiation and repassivation of SUS304L. SUS304L specimens with acrylic crevice were held at constant electr ochemical potentials in 1000ppm Cl- solution. It was in...
英字タイトル:
Evaluation of crevice corrosion initiation condition and repassivation condition of SUS304L