OS 04a Research & Development

SubSea NORM Detection

NORM IN SUBSEA PIPELINES 
Just as with top-sides pipework, NORM can accumulate in subsea pipelines as well.  The accumulation of NORM can greatly influence the final decommissioning and potential abandonment of subsea pipework. When any pipework (or even attendant infrastructure such as valves, manifolds and heat-exchangers) is retrieved from the seabed, an accumulation of NORM can pose a health and environmental hazard.  Being able to ascertain the presence of significant build-ups of NORM can greatly mitigate the risk and allow more informed planning and decision making.

USING PIG PATROL?
Though Pig Patrol was initially designed for tracking pigs with on-board radioisotopes, the outstanding performance of the detection system allows the use of the Pig Patrol for detection of significant NORM in subsea pipelines.

Question: Can I measure the presence of NORM in any pipeline?  How can I measure through the pipe walls?

Answer: Most, but not all NORM is detectable through the wall of your pipeline.  However, what the application of a subsea detection system allows you to do is determine if there are any significant build-ups of NORM and determine if there is a radiation hazard that will need to be mitigated/managed for abandonment or retrieval.