Determining the density of graphite bricks

Summary

The reactor cores of Advanced Gas-cooled Reactors (AGRs) in the UK are made up of graphite bricks. Channels run through these bricks, containing nuclear fuel, control rods and other equipment. Control rods are used to control and to shut down the nuclear reactor. Over time, the properties of the graphite bricks are modified, and these changes can contribute to determining how long a reactor can operate. One way in which the bricks change is in their density. The challenger is seeking solutions which will enable them to measure this density change over time.

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