OMS adapts AGILITY crawlers to solve stress corrosion cracking issues in nuclear pipework

During the past three years, OMS have been working on specific robotic crawlers capable of achieving our industry-leading visual testing and laser profilometry in complex pipework across a range of pipe sizes – from 8” to 16” – with pipe ID ranges from 130mm to 380mm.

OMS had already developed the AGILITY series of robotic inspection equipment, but due to the additional challenges posed by the pipework and access restrictions (via a non-return valve) – this project required updates to these robots.

Nuclear AGILITY.mini crawler

Nuclear AGILITY.micro crawler

Additional pulling power was provided by doubling the number of drive motors, and some novel mechanical design undertaken to generate greater traction from the drive wheels – whilst still adhering to PMUC requirements for materials contacting the pipe surface. This additional engineering was done to ensure the robot had no issues reaching the end of the pipework which comprised numerous tight radius bends as well as inner diameter transitions – and in some cases carrying an additional payload for other activities inside the pipe.

The finished robot has achieved great results; passing the visual testing standards required by EDF to inspect internal SCC, and also able to conduct laser profilometry on all the welds before/after activities are carried out on the weld.

If you have a challenging nuclear project, OMS may be able to help. We have a highly skilled and well-resourced R&D department, alongside a collaborative approach to customer service that means we can often find a solution to even the most difficult problem. Contact us to find out more.

Stress corrosion cracking example

Stress corrosion cracking example