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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.
IAEA Technical Meeting – October 2014
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
4 IAEA Technical Meeting – October 2014
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
IAEA Technical Meeting – October 2014
BEM Signal Penetration
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Pipe Wall Cross-section
IAEA Technical Meeting – October 2014
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
8 IAEA Technical Meeting – October 2014
Inline BEM Assessment of Buried Piping
Complete BEM Inspection of Carbon Steel Cylinder Piping in an NPP
9 IAEA Technical Meeting – October 2014
Case Study:
600 feet of BEM Inspection along a 30” ID Carbon Steel
Service Water Turbine Header
10 IAEA Technical Meeting – October 2014
PIG Scanning on Cooling Water Header
Pipe Inspection Gauge (PIG) allows scanning of straight sections along
this long carbon steel lined pipe run.
11 IAEA Technical Meeting – October 2014
During PIG scanning is collected as much as third of a million single data points.
| Model Situation |
PIG Scanning on Cooling Water Header – Application
12 IAEA Technical Meeting – October 2014
PIG Scanning on Cooling Water Header – Application
13 IAEA Technical Meeting – October 2014
PIG Scanning on Cooling Water Header – Results
14 IAEA Technical Meeting – October 2014
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.
15 IAEA Technical Meeting – October 2014
| Model Study |
Through Wall Spools HSK BEM Scanning – Application
16 IAEA Technical Meeting – October 2014
Through Wall Spools – Result
17 IAEA Technical Meeting – October 2014
The Apparent Wall Thickness model is one of the possible interrelations of BEM signal response.
Elbows HSK BEM Scanning – Application
18 IAEA Technical Meeting – October 2014
Colour strips indicates specific progression of a hand held antenna.
Elbows HSK BEM Scanning – Result
19 IAEA Technical Meeting – October 2014
The Apparent Wall Thickness model is one of the possible interrelations of BEM signal response.
BEM Assessment of Joints
BEM technique is utilizing any smaller antenna or Insertion Probe that allows for
joint condition assessment.
20 IAEA Technical Meeting – October 2014
| Model Study |
Joint Detail
BEM Assessment of Joints
21 IAEA Technical Meeting – October 2014
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
22 IAEA Technical Meeting – October 2014
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
23 IAEA Technical Meeting – October 2014
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
24 IAEA Technical Meeting – October 2014
•The appropriate equipment and its calibration for an actuall joint scan is always required. • The Apparent Wall Thickness model is provided.
The Joints BEM Assessment Application
25 IAEA Technical Meeting – October 2014
The Joints BEM Assessment Application
26 IAEA Technical Meeting – October 2014
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
27 IAEA Technical Meeting – October 2014
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
28 IAEA Technical Meeting – October 2014
| Model Study |
Condensation Pump Vessel- Application
29 IAEA Technical Meeting – October 2014
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
30 IAEA Technical Meeting – October 2014
BEM Signal Intensity model (BSI) is the regular interrelation of BEM signal response.
The Concept of the Interactive Pipe
31 IAEA Technical Meeting – October 2014
The Best Prevention is Constant Monitoring
The Concept of the Interactive Pipe
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• Permanently installed BEM sensor on a buried pipeline
• Early notice
• Remote monitoring of an actual conditions • Long term pipe wall degradation development observatrion
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www.rocksolidgroup.com [email protected]
IAEA Technical Meeting – October 2014
Thank you for your attention
Vojta Kriz
Current Modes of BEM Application
Hand Scanning (HSK)
Inline Inspections (PIG)
Crown Assessment Probe (CAP)
Keyhole Inspection System (KIS)
Wall Assessment Probe (WAP)
34 IAEA Technical Meeting – October 2014
APPENDIX
Hand Scanning Kit (HSK)
35 IAEA Technical Meeting – October 2014
In-Line Inspections (PIG)
36 IAEA Technical Meeting – October 2014
Crown Assessment Probe (CAP)
37 IAEA Technical Meeting – October 2014
Pipe
Flexible Antenna
Rigid Housing
Keyhole Inspection System (KIS)
38 IAEA Technical Meeting – October 2014
Wall Assessment Probe (WAP)
39 IAEA Technical Meeting – October 2014