Refurbishment and Support for Two CANDU Heat Exchangers The Problem Heat exchanger efficiency deteriorated due to secondary side scale build-up, and corrosion had significantly reduced shell wall thickness. Tube bundles were to be cleaned of deposits and a new shell installed. Each CANDU heat exchanger was approximately 10 m long with a weight of over 20 Tonnes. Decontamination of the heat exchangers was not necessary, and client personnel worked under Kinectrics’ radiation and safety monitoring guidelines. The Process The client’s workers were trained in radiation safety procedures by Kinectrics. Each heat exchanger emitted significant fields, while disassembly, cleaning, and reassembly all presented the risk of loose contamination hazards. The Solution The heat exchangers were refurb

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