Vibration problems associated with AGR thermal insulation

A programme is described of theoretical and experimental work undertaken to ensure that the thermal insulation lining the concrete pressure vessel of the Dungeness 'B' Advanced Gas-Cooled Reactor would withstand the prevailing noise and turbulence levels over the station lifetime. The methods of designing the insulation to withstand the particular spectrum generated by the Dungeness circulators are described together with the steps taken to resolve the conflicting design requirements for vibration, thermal performance and loading due to thermal cycling. The most important aspects of design for acceptable vibration levels are covered in the paper and illustrated with examples of typical test results. (author)