Air inleakage occurs when mechanical, corrosion, or other causes create cracks in the rupture disk or when their assemblies cease being airtight and become a major leakage path. Subsequently, water and steam chemistry and cycle corrosion protection is out of control and, in the case of severe air inleakage, condenser vacuum and cycle output and efficiency are reduced. During operation, the loss of tightness of the rupture discs is impossible to correct. Unit shutdown for repairs is inconvenient and the cost of downtime is high, up to $ million/day.
The Jonas, Inc. Turbine Rupture Disk Cover can be installed in about 20 minutes while the turbine is running. When installed, the Covers also serve as an indicator of leakage of the rupture disc assembly so the original rupture disk replacement can be planned.
Jonas, Inc., 1113 Faun Road, Wilmington, DE 19803. Tel: 302-478-1375; Fax: 302-478-8173.