Pool Test Reactor

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Pool Test Reactor (PTR) was a 10 kWt ordinary (light) water moderated pool-type reactor fueled with highly enriched uranium built at Chalk River in 1957. It used 93% enriched uranium-aluminum plate-type fuel. The reactor, was used for burnup measurement of fissile samples from NRX. The reactor was designed and built by Canadair, now a division of Bombardier.


On Nov 29 1957 reactor attained first criticality at 12:05 pm.and shortly took over the function of ZEEP for measuring reactivity effects of materials, particularly after irradiation. It was shut down and defueled in 1990.

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