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第9回
PD 資格試験開始から6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
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The PD Center of Central Research Institute of Electric Power Industry (CRIEPI) commenced Performance Demonstration examin ations for flaw depth sizing of austenitic stainless steel pipes in March 2006As of January, 2012, 34examination courses h ave been completed and 37out of 47candidates passed the examination including recertification test. The average error marg in of the successful applicant of the PD examination to the eleventh stage was 0.32mm, and standard deviation was 1.93mm....
英字タイトル:
Report on Performance Demonstration for depth sizing of SCC in austenitic stainless steel pipes
第9回
Quantitative NDE of pipe wall thinning using pulsed eddy current testing method
著者:
Shejuan XIE,Toshiyuki TAKAGI,Tetsuya UCHIMOTO,Zhenmao CHEN
発刊日:
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Abstract: In nuclear power plants (NPPs), due to flow accelerated corrosion (FAC) and liquid droplet impingement (LDI) of the coolant inside the pipe, there may happen local wall thinning defects on the inner surface of a pipe. Concerning the material of pipes, there are mainly two types, low-carbon steel and stainless steel. In this paper, the feas ibility of quantitative nondestructive evaluation (QNDE) to wall thinning in stainless steel pipes using pulsed eddy current testing (PECT) method is discussed...
英字タイトル:
Quantitative NDE of pipe wall thinning using pulsed eddy current testing method
第9回
SS400 鋼の磁化特性を利用した応力と塑性変形の評価
著者:
渡邊 誠,Makoto WATANABE,安部 正高,Masataka ABE,松本 英治,Eiji MATSUMOTO
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Ferromagnetic materials have the interaction between mechanical and magnetic fields which is called magnetoelastic coupling. Also it is known that magnetic properties of ferromagnetic materials depend on plastic deformation. There are various kinds of Non-Destructive Testing (NDT) based on these phenomena for estimation of stress and plastic deformation. We propose a new analytical method of magnetic hysteresis curve, in which the saturation magnetic hyste resis curve is decomposed to neutral magnetization...
英字タイトル:
Estimation of Stress and Plastic Deformation of SS400 SteelUsing Magnetic Properties
第9回
T字配管合流部に生じる温度変動の数値解析による評価LES Dynamic による格子影響評価一
著者:
歌野原 陽一,Yoichi UTANOHARA,中村 晶,Akira NAKAMURA,三好 弘二,Koji MIYOSHI,笠原 直人,Naoto KASAHARA
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Abstract Thermal fatigue crack may initiate at mixing tee where high and low temperature fluids flow in and mix. In order to prevent piping failure caused by thermal fatigue, an evaluation procedure of fluid temperature fluctuation at mixing tee using numerical simulation has been de veloped. This paper compared results of three computational grids of different resolution and discussed the effect of the grids resolution on predictions. The same simulation conditions were set same as WATLON experiments perf...
英字タイトル:
Numerical Simulation of Temperature Fluctuation Downstream from a T-Junction-Evaluation of Computational Grid Influence Using LES Dynamic Model
第9回
き裂を有する原子炉内機器への ウォータージェットピーニングの適用
著者:
長谷川 国広,Kunihiro HASEGAWA,波東 久光,Hisamitsu HATOU,齋藤 昇,Noboru SAITOU,菅野 明弘,Akihiro KANNO,吉久保 富士夫,Fujio YOSHIKUBO,守中 廉,Ren MORINAKA
発刊日:
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稲田 崇 Takashi INADA Water Jet Peening (WJP) has been widely applied to Japanese nuclear power plants since 1999, as an approved mechanical mitigation technique against stress corrosion cracking (SCC) on materials use d for nuclear reactors.Existing laboratory experience and analysis indicated that WJP had no negative impact on pre-existing cracks, such as crack propagation during its application, although ther e was no field experience of applying WJP on cracked surfaces. Recently, The Japan Atomic Power C...
英字タイトル:
APPLICATION OF WATER JET PEENING ON BWR REACTORINTERNALS WITH CRACKED SURFACES
第9回
ねじりモードガイド波によるエルボ部の減肉の最適計測手法
著者:
古川 敬,Takashi FURUKAWA,西野 秀郎,Hideo NISHINO
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This paper presents an application of numerical simulation for ultrasonic guided wave in piping with elbow. A displacement field of torsion al guided waves in elbow and piping beyond elbow was computed using three-dimensional finite element models. We tried to utilize the predic ted displacement field to optimize the measurement condition or estimation of defect detectability. Experimental validation was carried our using artificial defects in elbow and beyond elbow region. Good agreement was obtained bet...
英字タイトル:
Optimum measurements for pipe wall thinning in an elbow using torsional guided waves
第9回
ウエルドオーバーレイ施工部に付与された各種人工欠陥の応答性評価
著者:
東海林 一,Hajime SHOHJI,秀 耕一郎,Koichiro HIDE,渡辺 恵司,Keiji WATANABE
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キーワードタグ:
In Japan, a performance demonstration (PD) system for certifying WOL inspection methods is being developed. The Japanese qualification requirements dictate that either real IGSCC or equivalent flaws that produce ultrasonic responses similar to IGSCC be used in the qualification test samples. Studies have shown that it is very difficult to control the growth of deep IGSCC in weld overlay samples, so the Japanese have selected an alternative flaw making process that is capable of produc ing equivalent respo...
英字タイトル:
The Ultrasonic Responses from Intergranular Stress Corrosion Cracking andother alternative flaws in Weld Overlay (WOL) Samples
第9回
ウォータジェットピーニングによる残留応力の特性
著者:
鈴木 賢治,Suzuki KENJI,城 帖美,Ayumi SHIRO
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The material of the specimen was austenitic stainless steel, SUS316L. The residual stresses in the specimen was introduced by a water j et peening (WJP). The change in the residual stress with thermal aging at 773K was measured by an X-ray stress measurement. The WJP res idual stresses were an equi-biaxial stress state, and the compressive residual stress did not decrease against the thermal aging. To i nvestigate dependence of the residual stress on a lattice plane, the WJP residual stresses were measured...
英字タイトル:
Characteristics of Residual Stresses of Water Jet Peened Stainless Steel
第9回
エネルギー機器用構造材料のクリープ・疲労劣化損傷過程における電磁特性評価
著者:
鈴木 隆之,Takayuki SUZUKI,橋立 竜太,Ryuta HASHIDATE
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Magnetic characterization of creep-fatigue damage for welded specimens of austenitic stainless steel (SUS316FR) and high-chronium steel (Mod.9Cr-1Mo) steel was performed using magnetic force microscope an d Hall sensor. In SUS316FR volume fraction of d-ferrite at weld metal region decreased by creep or creep-fatigue and the remanent magnetic flux density at weld metal region also decreased. In Mod.9Cr-1Mo steel magnetic characteristics at weld metal region were different from those at base metal initially,...
英字タイトル:
Magnetic Characterization of Creep-fatigue Damagefor Energy Structural Materials
第9回
オリフィス下流高速気液二相流および液膜からの液滴発生の可視化計測
著者:
江原 真司,Shinji EBARA,梅原 真弘,Masahiro UMEHARA,橋爪 秀利,Hidetoshi HASHIZUME
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Abstract Liquid droplet impingement (LDI) erosion can never be caused when there is not any liquid droplet in a piping system. In this study, the liquid droplet generation from l iquid film formed downstream an orifice in a pipe was studied experimentally and visualized by using a high-speed camera. Water-air two-phase flow was supplied to the orifice and liquid film was formed in the recirculation region downstream the orifice. It was found from the experiment that the liquid film was entrained by the fas...
英字タイトル:
Visualization Experiment of High-speed Gas-liquid Two-phase Flow and Liquid Droplet Generation from Liquid Film downstream of an Orifice
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