SCAR RADIOGRAPHY DACON INSPECTION SERVICES SCAR and Baby SCAR - - PowerPoint PPT Presentation

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Aug 18, 2023 23 likes •198 views

SCAR RADIOGRAPHY DACON INSPECTION SERVICES SCAR and Baby SCAR GAMMA RADIOGRAPHY Who we are Conventional and Oil and Gas, Refinery, Over 400 personnel Thailand headquarters Advanced NDT and Petrochemical, Heavy including more than

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DACON INSPECTION SERVICES

SCAR RADIOGRAPHY

SCAR and ‘Baby’ SCAR GAMMA RADIOGRAPHY

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Who we are

Conventional and Advanced NDT and Inspection Services Oil and Gas, Refinery, Petrochemical, Heavy Industry, Mining Over 400 personnel including more than 300 inspectors Thailand headquarters with International expertise since 1979

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

SCAR

Small Controlled Area Radiography

Two different SCAR systems

1. ‘Baby’ SCAR 989 Se 75, (Max 20 Curie) 2. SCAR 959M. 80 Ci of Se 75 or 15 Ci of Ir 192

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Se-75 working range of 5-30mm steel thickness
Ir 192 working range of 10-50mm steel thickness
Se-75 has a softer gamma ray spectrum (66-401 keV)

than Iridium-192 (295-612 keV)

Se 75 = Half Life of 119.8 days, (120 days)
Ir 192 = Half Life of 73.83 days. (74 days)

Approx 46 days difference

SCAR

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Baby SCAR Projector

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

SCAR Radiography

Se75 is mid-thickness gamma radiography
‘Baby’ SCAR has a tungsten shield
Weighs 7.5 kg
‘Encapsulated source’ NEVER leaves container

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Baby SCAR Projector

Baby SCAR container showing lock device and beam port.

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Octagonal Cross Section Pellet shape improves Geometric Unsharpness therefore better quality radiograph

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Octagonal Cross Section

Diagonal of the octagonal pellet is 1.145 times pellet

diameter. Diagonal of cylinder
f the same diameter,

is 1.414 times its diameter. The pellet geometry allows source to be up to 23.5%

closer. This increases exposure

rate per Curie at the object.

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Projector Placement

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Shielding Projector

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Survey Safe Distance

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Record Measurement of Safe Zone

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Reduced Area of Safe Zone From Football Pitch Size to Centre Circle Or Less

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

Baby SCAR Radiography Advantages of SCAR System

 Safety Improvements - daylight working  No Downtime  Allows Continuous Construction Work  Schedules Maintained or Improved  On-line Radiography - Allows Instant Welder Performance Monitoring  ‘Nucleonics’ Type instruments Not Affected

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

SCAR Summary

SCAR + Baby SCAR is safe to use 24 hours a day - no need for specific

radiography windows.

Cost efficient.
The barriered area is always very small, plus collimation less than 10 m

diameter (SCAR).

Safe area is easier to see & control.
SCAR will rarely affect other work.
Equipment fits most pipe geometries.
SCAR can replace most conventional radiography when planned in

advance.

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DACON INSPECTION SERVICES P E R F O R M A N C E YO U C A N T R U S T

How Can We Help?

Contact Tim Shaw Chief Marketing Officer Email : info@dacon-inspection.com Mobile Phone : +66 (0) 89 245 9966 www.dacon-inspection.com