Nondestructive testing of moisture separator reheater tubing system using Hall sensor array

Le, Minhhuy; Kim, Jungmin; Kim, Ji-Soo; Sik, Hwa; Lee, Jinyi

doi:10.1080/10589759.2017.1331231

Cited by 18 publications

(13 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Hall voltage V H by Equation ( 7) is linearly proportional to Hy, the magnetic flux density in the vertical direction. On the other hand, if the Hall constant (k) and the Hall sensor input current (I) are constant, and Equation ( 6) is substituted into Equation ( 7), it is expressed as Equations ( 8) and (9). That is, by measuring the magnetic flux density in the vertical direction, the depth of the defect can be quantitatively evaluated, where c 1 and c 2 are constants:…”

Section: H Y = H Lu + H Ld + H Ru + H Rdmentioning

confidence: 99%

“…These are non-contact inspection methods that do not require the coupling material during the inspection. ECT is a widely used method for the inspection of heat exchanger tubes and boilers of nuclear power plants [6][7][8][9][10][11]. This method is highly sensitive to the surface cracks, but it is limited to detecting deep defects due to the high concentration of eddy current on the specimen surface in the skin depth effect.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of Thinned Water-Cooled Wall in a Circulating Fluidized Bed Boiler Using Ultrasonic and Magnetic Methods

et al. 2021

Self Cite

View full text Add to dashboard Cite

In this paper, a nondestructive inspection system is proposed to detect and quantitatively evaluate the size of the near- and far-side damages on the tube, membrane, and weld of the water-cooled wall in the fluidized bed boiler. The shape and size of the surface damages can be evaluated from the magnetic flux density distribution measured by the magnetic sensor array on one side from the center of the magnetizer. The magnetic sensors were arrayed on a curved shape probe according to the tube’s cross-sectional shape, membrane, and weld. On the other hand, the couplant was doped to the water-cooled wall, and a thin film was formed thereon by polyethylene terephthalate. Then, the measured signal of the flexible ultrasonic probe was used to detect and evaluate the depth of the damages. The combination of the magnetic and ultrasonic methods helps to detect and evaluate both near and far-side damages. Near-side damages with a minimum depth of 0.3 mm were detected, and the depth from the surface of the far-side damage was evaluated with a standard deviation of 0.089 mm.

show abstract

Section: H Y = H Lu + H Ld + H Ru + H Rdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of Thinned Water-Cooled Wall in a Circulating Fluidized Bed Boiler Using Ultrasonic and Magnetic Methods

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, many features of the medium flow processes, heat and mass transfer in them had not been sufficiently studied [7][8][9][10]. They were investigated only on smallscale models and did not take into account the scale factor, the geometry specifics of the systems and moisture separation and reheating processes [11][12][13][14][15][16][17]. Natural designers' tendency to maximize the devices' compactness (minimum metal capacity) made the problem even more complex.…”

Section: Some Thermal-hydraulic Processes Features In Msr Revealed During Their Operationmentioning

confidence: 99%

“…Unfortunately, present day designers use solutions obtained in homogeneous approximation. Due to the complexity and originality of the two-phase flow regimes in the separation part of the SMSR it is advisable to carry out additional experimental research [24], as, for example, it was done when developing the upgraded version of SMSR-500-1 [25][26].…”

Section: Analysis Of the Ways To Increase The Efficiency Of Thermal Hydraulic Processesmentioning

confidence: 99%

The new ways to increase the efficiency of thermal hydraulic processes in systems of separation and reheating of NPP wet steam turbines

et al. 2020

View full text Add to dashboard Cite

Systems of moisture separators - reheaters (SMSR) were created simultaneously with the powerful turbines development of nuclear power plants operating on a wet steam from the early 60s of the 20th century. This lengthy experience made the opportunity to identify the moisture separators - reheaters (MSRs) drawbacks, to determine the objectives for their design and computation improvement in order to increase thermodynamic efficiency, MSR devices and MSR systems reliability in general. Based on maintenance experience and results of our and other researchers’ model and field studies this article discusses potential ways of further development and improvement, taking into consideration both SMSR components (separation and reheating) under conditions of their flow in one apparatus.

show abstract

“…One of the main requirements to the MSR [4,5] is effective [6][7][8] and reliable [9] operations of separating facilities [10] at every mode of operation of the power unit.…”

Section: Introductionmentioning

confidence: 99%

Fluid mechanics tests of separator-reheater turbines

Egorov

Suslov²

2018

MATEC Web Conf.

View full text Add to dashboard Cite

The main aim of the current work is to increase operation efficiency and reliability of moisture separator-reheaters and turbines of NPPs. As the experience from MSR-500-1 operation showed the presence of large disperse moisture leads stops of the turbine. The high wetness level of steam downstream of separating devices observed since the first years of operation. Results from tests of the modernized separator-reheaters of the first unit at the Smolensk NPP with «Powervane» louvers developed by Balcke-Durr company are presented. Results from studies on the determination of wetness of the steam at the outlet from the separating part of the MSR-14, MSR-24, which demonstrate advantages of modernized construction are discussed. Modernization of separator-reheaters of the turbines TG-1, TG-2 resulted in eliminating non-uniformity of wetness over the perimeter and height of the steam space downstream the separation units. Success in modernization was caused by arranging separate outlets for moisture depositing at the walls, bottom of the inlet chamber. According to the results of the carried out studies an average value of the wetness at the outlet of the separation units was 0.6% which is close to the design value 0.5%.

show abstract

Nondestructive testing of moisture separator reheater tubing system using Hall sensor array

Cited by 18 publications

References 11 publications

Measurement of Thinned Water-Cooled Wall in a Circulating Fluidized Bed Boiler Using Ultrasonic and Magnetic Methods

Measurement of Thinned Water-Cooled Wall in a Circulating Fluidized Bed Boiler Using Ultrasonic and Magnetic Methods

The new ways to increase the efficiency of thermal hydraulic processes in systems of separation and reheating of NPP wet steam turbines

Fluid mechanics tests of separator-reheater turbines

Contact Info

Product

Resources

About