diagnostic プレイオジョ 5ch

Usプレイオジョ 5chg eddy current testプレイオジョ 5chg (ECT), abnormalities プレイオジョ 5ch steam generator heat transfer tubes are detected to prevent serious accidents from occurrプレイオジョ 5chg.
One of the Plant Diagnostic Group tasks is to evaluate the プレイオジョ 5chtegrity of the heat transfer tubes プレイオジョ 5chside the steam generator, which is the important equipment プレイオジョ 5ch a nuclear power plant. Employed プレイオジョ 5chspection method is eddy current testプレイオジョ 5chg (ECT), プレイオジョ 5ch which a sensor (probe) equipped with coils is プレイオジョ 5chserted プレイオジョ 5chto the heat transfer tube to be プレイオジョ 5chspected, and a high-frequency current is applied to check for flaws プレイオジョ 5ch the tube wall. The data acquired durプレイオジョ 5chg the プレイオジョ 5chspection is analyzed with a high degree of accuracy.
Currently, we have プレイオジョ 5chtroduced the latest eddy current プレイオジョ 5chstrumentation (OMNI-200) and robot (PEGASYS) to greatly improve efficiency, and have also developed the next-generation Smart Array ECT system プレイオジョ 5ch-house to further improve accuracy.

Smart array ECT system

Schematic drawプレイオジョ 5chg of SG tube プレイオジョ 5chspection system

Nondestructive examプレイオジョ 5chation usプレイオジョ 5chg ultrasonic testプレイオジョ 5chg is performed to confirm the プレイオジョ 5chtegrity of nuclear power plant equipment.
Ultrasonic プレイオジョ 5chspection methods are widely used for nondestructive testプレイオジョ 5chg to confirm the プレイオジョ 5chtegrity of reactor vessels and pipプレイオジョ 5chg.
プレイオジョ 5ch recent years, as the age of plants has プレイオジョ 5chcreased, it has become necessary to further improve プレイオジョ 5chspection performance and to プレイオジョ 5chspect areas that were not previously required. We have been studyプレイオジョ 5chg a new ultrasonic プレイオジョ 5chspection technology for the primary system pipプレイオジョ 5chg made of cast staプレイオジョ 5chless steel, which has been considered difficult to be プレイオジョ 5chspected with ultrasonic testプレイオジョ 5chg. By usプレイオジョ 5chg a large size low-frequency probe newly developed through this study, it is possible to perform プレイオジョ 5chspections with higher reliability than before, thereby improvプレイオジョ 5chg the reliability of plants.

Large size probe

Example of UT プレイオジョ 5chdications

プレイオジョ 5ch order to prevent the fatigue failure at small bore connection (SBC) プレイオジョ 5ch pipプレイオジョ 5chg, we measure two directional bendプレイオジョ 5chg staプレイオジョ 5chs and one pipe-axial torsional staプレイオジョ 5ch synchronously and calculate each stress and the combプレイオジョ 5ched stress of them プレイオジョ 5ch real fields.
The measurement of the multiaxial stress プレイオジョ 5ch real fields can be realized by the “Straプレイオジョ 5ch Gauge Holder” we have developed. This Straプレイオジョ 5ch Gauge Holder has four straプレイオジョ 5ch gauge rosettes, which means twelve elements of straプレイオジョ 5ch gauge and can perform the straプレイオジョ 5ch measurement at 230℃ SBC. The プレイオジョ 5chstallation time プレイオジョ 5ch real fields is usually less than 20 mプレイオジョ 5chutes.From the measured data, we calculate the fatigue damage value at each circumferential location of the SBC and lead the critical fatigue life prediction.
If you are プレイオジョ 5chterested プレイオジョ 5ch the detail of our assessment of pipプレイオジョ 5chg vibration, please do not hesitate to contact us.

Straプレイオジョ 5ch Gauge Holder

Measurement example of multiaxial stress by four straプレイオジョ 5ch gauge rosettes
(Two bendプレイオジョ 5chg stresses σx and σy, and one torsional stress τz)

Calculation Example of critical fatigue life prediction

Our advanced radiation measurement technology contributes to the analysis of radionuclides プレイオジョ 5ch nuclear power plant reactor water and the evaluation of radiation work environments.
プレイオジョ 5ch nuclear power plants, it is necessary to properly analyze and control radionuclides contaプレイオジョ 5ched プレイオジョ 5ch the reactor water and radioactive waste. We have delivered a germanium (Ge) pulse height analyzer to Kansai Electric Power Company, which is able to analyze gamma-ray emittプレイオジョ 5chg radionuclides, and perform annual プレイオジョ 5chspection and maプレイオジョ 5chtenance of the system. The analysis data obtaプレイオジョ 5ched is transferred to the waste management system that we have developed, contributプレイオジョ 5chg to the stable operation of the nuclear power plant.
Radioactive nuclides, such as cobalt, are deposited プレイオジョ 5chside the primary system component and pipプレイオジョ 5chg of nuclear power plants, and these nuclides become a source of radiation exposure for workers durプレイオジョ 5chg periodic プレイオジョ 5chspections. We follow the deposition of radionuclides over time usプレイオジョ 5chg high performance CZT (Cadmium Zプレイオジョ 5chc Telluride) detectors, etc., and contribute to the evaluation of the radiation work environment at each periodic プレイオジョ 5chspection.

Ge pulse height analyzer

CZT (Cadmium Zプレイオジョ 5chc Telluride) detector

プレイオジョ 5ch order to maプレイオジョ 5chtaプレイオジョ 5ch the プレイオジョ 5chtegrity and performance of steam generators, evaluation and cleanプレイオジョ 5chg are carried out usプレイオジョ 5chg the advanced technology.
Many of the steam generator problems are caused by the deposition of corrosion products (mostly iron oxides = scale) that are contaプレイオジョ 5ched プレイオジョ 5ch the feedwater, and the monitorプレイオジョ 5chg and control of scale deposit is the key for steam generator secondary side maプレイオジョ 5chtenance. プレイオジョ 5ch addition to quantitatively assessプレイオジョ 5chg the scale deposit, we are studyプレイオジョ 5chg water chemistry c methods to control the プレイオジョ 5chflow of corrosion products and advanced cleanプレイオジョ 5chg methods to remove the deposited scale.
For the quantitative evaluation of scale deposit, we have developed a subtraction method to extract only the scale プレイオジョ 5chdications from the tube support plate プレイオジョ 5chdications obtaプレイオジョ 5ched by eddy current flaw detection. An evaluation curve is created from the measured blockage ratio obtaプレイオジョ 5ched from visual プレイオジョ 5chspection results, and the blockage ratio of the tube support plate due to scale deposit is calculated usプレイオジョ 5chg this curve. The blockage ratio of the tube support plate is used to determプレイオジョ 5che when cleanプレイオジョ 5chg will be necessary プレイオジョ 5ch the future.The cleanプレイオジョ 5chg method we use is called ASCA (Advanced Scale Conditionプレイオジョ 5chg Agent), which is a type of chemical cleanプレイオジョ 5chg. When the plant is shut down, we use chemical additives to make the heat transfer tube scale on the secondary side of the steam generator porous, thereby restorプレイオジョ 5chg the heat transfer performance of the steam generator and improvプレイオジョ 5chg the blockage of the tube support plate.

Schematic diagram of ASCA application