Amber zone

Amber zone A ventilation containment zone used in the atomic energy industry. 

An amber zone / area exists if the AGW is exceeded (the tolerable zone / area), Here a health risk must be assumed for the exposed workforce. To continue work under these conditions requires additional measures (like personal protective equipment) and an authorisation from the surveillance authority is necessary. 

Figure 9.3 shows the sulfonate concentration decreased when polymer was first produced. As the sulfonate concentration decreased in the zone of SPl, there was a marked change in effluent appearance. The fluid changed from turbid, caramel-colored to transparent amber. In this case, after the sulfonate concentration reached a minimum, it began increasing. As it increased, the second turbid, caramel-colored sulfonate phase was produced. The fractional volume of this phase increased as sulfonate concentration increased. This result indicates that SPl loss was caused by phase trapping. 

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