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Broadband Electro-Magnetics BEM

Non Destructive Inspection of Buried, Underground

Piping and Tanks at Nuclear Power Plants

1 IAEA Technical Meeting – October 2014

RSG Company Overview

2

Rock Solid Group (RSG) is widely recognised globally as a major provider & developer of Non- Destructive Testing (NDT) technology. RSG serves customers from various industries.

IAEA Technical Meeting – October 2014

3

We maintain an active Research

& Development program that develops new BEM technology configurations suitable for specific applications.


RSG Research

BEM Inspection Technology

INTRODUCTION BEM Overview

BEM Signal Penetration

BEM Results

UTILIZING BEM at NPPs Model Situation – BEM Assessment of Buried Header

Model Situation – BEM Assessment of Condensation Pump Vessel

The Concept of the Interactive Pipe


BEM Overview

5

• Assessment of ferrous and non-ferrous structures

• Derivative of the ‘pulse eddy current’ system

• Non-frequency dependent

• Ability to scan through thick coating / lining (1” +)

• Contact with metallic surface not required

• Patented Technology


BEM Signal Penetration

6

Pipe Wall Cross-section


Antenna

Antenna

0 50 100 150 200 250 300 350 400 450 500 550

0

50

100

150

200

250

300

350

BEM

Intensity

IAEA Technical Meeting – October 2014 7

BEM Results

Inline BEM Assessment of Buried Piping


Inline BEM Assessment of Buried Piping

Complete BEM Inspection of Carbon Steel Cylinder Piping in an NPP


Case Study:

600 feet of BEM Inspection along a 30” ID Carbon Steel

Service Water Turbine Header


PIG Scanning on Cooling Water Header

Pipe Inspection Gauge (PIG) allows scanning of straight sections along

this long carbon steel lined pipe run.


During PIG scanning is collected as much as third of a million single data points.

| Model Situation |

PIG Scanning on Cooling Water Header – Application


PIG Scanning on Cooling Water Header – Results


The Apparent Wall Thickness model is one of the possible interrelations of BEM signal response.

BEM Assessment of Through Wall Spools and Elbows

Hand Scanning Kit (HSK) is used for manual scanning of two through wall spools and four pipe bends.


| Model Study |

Through Wall Spools HSK BEM Scanning – Application


Through Wall Spools – Result



Elbows HSK BEM Scanning – Application


Colour strips indicates specific progression of a hand held antenna.

Elbows HSK BEM Scanning – Result



BEM Assessment of Joints

BEM technique is utilizing any smaller antenna or Insertion Probe that allows for

joint condition assessment.


| Model Study |

Joint Detail

BEM Assessment of Joints


To cover all joints in the selected SW header requires scanning of about 100 locations. Where is about 100 single data points collected per each single joint ring.

Cement Lining

Metallic Wall

• Requires clear access into the joint gap • Requires comprehensive post survey analysis •Available Apparent Wall Thickness model in inches

The Joints BEM Assessment Introduction


The open joint bell part is our target of scanning:

• Low budged solution • Simple scanning task • On field results available • Only relative comparison possible •100% joint circumference coverage

Scanning with the Insertion Probe Directly on the Metallic Wall

Scanning with the Antenna through the Cement Lining


metal wall becomes bare and inclines to direct corrosion impact.

The grout placed into the joint gap fall off (erosion),

The Joints BEM Assessment Specifically

• The sufficient equipment calibration for the actuall joint steel pipe is required. • The condions of joint can be assess relatively by the comparison to the other joints or a reference sample.

The Joints BEM Assessment Application


•The appropriate equipment and its calibration for an actuall joint scan is always required. • The Apparent Wall Thickness model is provided.





Not always is the joint fully accessible due to remaining grout or pipe bending, therefore the Insertion Probe offset from the pipe wall can vary along its circumference.

The Joints BEM Assessment Result


Linear chart representing one full circumferential joint scan indicating variation of BEM Signal Intensity (BSI) is a basic output for BEM joint scanning.

Condensation Pump Vessel (CPV) is scanned utilizing HSK unit.

BEM Assessment of Condensation Pump Vessel


| Model Study |

Condensation Pump Vessel- Application


The scanning program consists of two scanning procedures:

•Tube section of CPV allows for straight scanning. •To completely cover the cap bottom of the CPV, the fan like scanning method is applied.

Condensation Pump Vessel- Results


BEM Signal Intensity model (BSI) is the regular interrelation of BEM signal response.



The Best Prevention is Constant Monitoring



• Permanently installed BEM sensor on a buried pipeline

• Early notice

• Remote monitoring of an actual conditions • Long term pipe wall degradation development observatrion

33

www.rocksolidgroup.com [email protected]


Thank you for your attention

Vojta Kriz

http://www.rocksolidgroup.com/

Current Modes of BEM Application

Hand Scanning (HSK)

Inline Inspections (PIG)

Crown Assessment Probe (CAP)

Keyhole Inspection System (KIS)

Wall Assessment Probe (WAP)


APPENDIX

Hand Scanning Kit (HSK)


In-Line Inspections (PIG)


Crown Assessment Probe (CAP)


Pipe

Flexible Antenna

Rigid Housing

Keyhole Inspection System (KIS)


Wall Assessment Probe (WAP)


broadband electro-magnetics bem · pdf filebroadband electro-magnetics bem non destructive...

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