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第9回
沿岸立地構造物塩害評価及び対策
著者:
滝下 貴行,Takayuki TAKISHITA,中安 文男,Fumio NAKAYASU,来馬 克己,Katsumi KURUBA,梅原 敏弘,Toshihiro UMEHARA,野村 満幸,Mitsuyuki NOMURA,山本 裕之,Hiroyuki YAMAMOTO
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Nuclear spent fuel intermediate storage facility is planned to be located in the Sea of Japan coast area. Therefore, there is risk of structure corrosion by sea salt aerosol. This study is the co rrosion risk evaluation and it's countermeasure of that facility....
英字タイトル:
Evaluation of Salt Damage Structure Located in the Coastal
第9回
浜岡原子力発電所5号機 塩分除去装置によるプラント系統水の浄化について
著者:
堀内 秀晃,Hideaki HORIUCHI,高柳 省治,Shouji TAKAYANAGI,寺井 啓祐,Keisuke TERAI,根本 清司,Seiji NEMOTO
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In Hamaoka Nuclear Power Station No.5, condenser tube broke on May 14, 2011, and a large quantity of seawater invaded in the wide area of the plant. The seawater contained a highly-concentrated chloride ion. Because the corrosion influence on equipments which constituted a plant was concerned about, we decided to remove a chloride ion in a desali nation plant. The desalination plant was manufactured from the quality of the general industrial product, we adopted some design changes and special inspection p...
英字タイトル:
Summary of the purification with the desalination plant of the seawater which invaded to a condenser of theHAMAOKA Nuclear Power Station No.5
第9回
浜岡原子力発電所5号機主復水器細管損傷の影響調査
著者:
市川 義浩,Yoshihiro ICHIKAWA,釘本 三男,Mitsuo KUGIMOTO,渡辺 哲也,Tetsuya WATANABE,三谷 和己,Kazumi MITANI,山本 優介,Yusuke YAMAMOTO
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In the process of achieving cold shutdown following the shutdown of Hamaoka Nuclear Power Station Unit 5 on May 14, 2011, the readings of conductivity meters monitoring the purity of the water in the main condensers began to rise, and the conductivity of the water in the reactor also began to rise. After cold shutdown, investigation identified that a high volume of sea water had flowed into the reactor facility due to damage to the main condenser tubes. Evaluations focusing on corrosion of materials have b...
英字タイトル:
Effect of sea water intrusion from main condenser, damaged by breakon reactor core internals, Hamaoka Unit 5
第9回
浜岡原子力発電所における津波対策(防波壁等工事概要)
著者:
秋山 康之,Yasuyuki AKIYAMA,清水 重彦,Shigehiko SHIMIZU,藤井 誠,Makoto FUJII
発刊日:
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At the Hamaoka Nuclear Power Plant, we have implemented measures to reflect the findings obtained from the accident at the Fukushima Daiichi Nuclear Power Plants of Tokyo Electric Power Company, by the ea rthquake off the coast of Pacific Ocean in March 2011. The main points of these measures are; The flooding prevention measures 1 (To prevent flooding by tsunami on the station site), 2 The flooding preven tion measures 2 (To prevent flooding inside buildings even if tsunami intrude the station site) 3 The...
英字タイトル:
Tsunami Measures for the Hamaoka Nuclear Power Plant.
第9回
漏洩磁束を利用した SUS304 鋼の疲労・損傷の評価
著者:
佐々木 海,Kai SASAKI,安部 正高,Masataka ABE,木下 勝之,Katsuyuki KINOSHITA,松本 英治,Eiji MATSUMOTO
発刊日:
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Austenitic stainless steel SUS304 is typically classified as a paramagnetic material, but it forms ferromagnetic martensite phase due to plastic deformation, stress or fatigue. This martensitic transformation can be applied to magnetic Non-Destructive Evaluation (NDE) technics. In this paper, we attempt to detect and estimate the artificially introduced notch, fatigue crack and fatigued part in SUS304 steel by measuring the Magnetic Flux Leakage (MFL) near the specimen surface. It is fo und that the notch ...
英字タイトル:
Evaluation of Fatigue and Damage in SUS304 using Magnetic Flux Leakage
第9回
熱疲労割れの直流電位差法による測定及び分析
著者:
遊佐 訓孝,Noritaka YUSA,王 晶,Jing WANG,橋爪 秀利,Hidetoshi HASHIZUME,Iikka VIRKKUNEN,Mika KEMPPAINEN
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This study reports the results of nondestructive testing and evaluation of artificial thermal fati gue cracks using direct current potential drop method. ?ix artificial thermal fatigue cracks, intro duced into type 304L austenitic stainless steel plates with a thickness of 25mm, are prepared; and potential drops across the cracks are measured using a direct current source of approximately 80A. The specimens are then served to destructive tests to reveal the true profiles of the cracks. Fini te element simu...
英字タイトル:
Nondestructive Testing and Evaluation of Artificial Thermal Fatigue Cracksusing Direct Current Potential Drop Method
第9回
発電機回転子コイルの絶縁劣化調査について
著者:
荒芝 智幸,Tomoyuki ARASHIBA,桑原 道明,Michiaki KUWAHARA,藤井 俊之,Shunji FUJII,石原 篤,Atsushi ISHIHARA,川井 政志,Masashi KAWAI
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Generally, troubles of the insulations applied to turbine generator stator and rotor occur accordingly the bathtub curve. During the second half of operation life of the turbine generators, it is necessary to make periodic insulation diagnosis assessment to assure reliability and minimize forced outage.Electrical insulation diagnosis method is being adopted on stator coil at periodic outa ge, while any specific insulation method is established for the rotor field coil. For this issue, sampling of pulled o...
英字タイトル:
Insulation Diagnosis Assessment for Field Coil of Turbine Generator Rotor
第9回
確率論を利用した複数配管の保全・設計最適化手法の開発
著者:
高瀬 健太郎,Kentaro TAKASE,江浪 久,Hisashi ENAMI,角皆 学,Manabu TSUNOKAI
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The conventional design of structural components such as piping or vessels is made based on the deterministic method. In the design method, the margin of the design integrity is expressed as empirical safety factor. On t he other hand, the stochastic safety factor is calculated from data such as the standard deviation of the mate rial strength in the LRFD (Load and Resistance Factor Design) method. This method allows a rational design bas ed on the up-to-date knowledge. In this study the optimization met...
英字タイトル:
Development of Maintenance and Design Optimization Method forPiping System Based on Stochastic Theory
第9回
磁気 AE を用いた SUS304 鋼の疲労評価に関する検討
著者:
安部 正高,Masataka ABE,松本 英治,Eiji MATSUMOTO
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Magneto-Acoustic Emission (MAE) is stress pulses observed during dynamic magnetization process of ferromagnetic material, which is caused by abrupt and discontinuous motion of magnetic domain wall pinned by inclus ions, voids, dislocations, grain boundaries etc. The characteristics of MAE change with the applied stress, plastic deformation and fatigue since the stress, dislocation and residual stress influence the structure of the magnetic domains and the pinning effects. Therefore, MAE is potential techni...
英字タイトル:
Fatigue Estimation of SUS304 Stainless Steel by Magneto-Acoustic Emission
第9回
磁気センサによる強磁性体鋼の非破壊材質評価
著者:
槌田 雄二,Yuji TSUCHIDA,榎園 正人,Masato ENOKIZONO
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Abstract: This paper presents a frequency sweeping excitation and spectrogram method (FSES m ethod) by magnetic sensor for non-destructive testing of hardened carbon steel. This method c an evaluate the magnetic properties in materials which were changed after induction heating. And, we tried to examine the degree of yield strength which varies with hardened conditions....
英字タイトル:
Non-destructive material evaluation for ferromagnetic steels by using a magnetic sensor
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