POSTED 15.10.21

EASL - Analysis and assessment of an abnormal trip transient

During August 2007, an AGR underwent an unplanned automatic trip during which there was post-trip overfeeding to one quadrant. As a result, there were rapid reductions in measured steam temperatures in instrumented parts of the boiler. Immediately the structural integrity implications of the event were assessed and the ensuing report recommended a programme of boiler modelling, structural analyses and assessments to underwrite the ongoing integrity.