Shell buys Jerome to measure mercury vapour
An
Able Instruments and Controls product story
Edited by the Engineeringtalk editorial team
Jul 14, 2009
Shell has bought a Jerome analyser from Able to measure mercury vapour at a Clipper gas-production platform.
The portable Jerome analyser will be used during maintenance and engineering activities on the platform and associated satellite wellhead platforms in the southern sector of the North Sea, approximately 62km from Bacton.
During gas and oil extraction, a mixture of sand, silt and mud is also drawn from the well.
This sludgy silt mud is rich in heavier-metal elements such as uranium and mercury.
As mercury exists naturally in vapour form, it is readily drawn along with the gas product.
Because mercury will evaporate and produce harmful vapours at relatively low temperatures, when a pressurised vessel that contains mercury droplets is depressurised, these vapours will start to be released.
When breaking confinement, even though a thorough gas test has proved there is no flammable gas present, the vessel could still present a hazardous health risk from invisible mercury vapours.
Shell bought the Jerome mercury analyser to check for mercury vapour when gas and liquid process lines on clipper gas-production platforms and associated satellite wellhead platforms are opened up.
The Jerome analyser was recommended by Shell's HSE advisors and occupational health departments.
Also used are mercury badges for individual monitoring during shift work.
Having the Jerome analyser allows Shell to detect and monitor if mercury is present and at what levels, to protect its staff.
During hydrocarbon breaching activities, spot tests for mercury will be carried out.
If mercury is detected, then appropriate protection will be taken before continuation of work.
Shell has generated specific work procedures and training for employees to ensure safe working practice.
The Jerome analyser will be used in the typically harsh offshore climate.
Mercury testing can be required inside the vessels, also many areas are open to the elements and access is awkward to some areas.
The robustness and portability of the Jerome analyser meets both of these requirements.
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