Reactor Core Annulus Inspection

Research Sites Restoration Limited (RSRL/the Employer), as part of the decommissioning of the Steam Generating Heavy Water Reactor (SGHWR) in Building D60 on the Winfrith site, plans to decommission the core of the reactor, by jacking it up from beneath, and size reducing the emerging top in a segmentation cell. The core is cylindrical and is suspended within a concrete bio-shield. The core comprises a series of stainless steel, carbon steel and aluminium tanks, bolted together with tie-rods and suspended in a concrete bio- shield. The core is cylindrical with an OD of 4508mm, and a height of 7176mm. The bio- shield has an ID of 4593mm. To ensure that the cor…

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