There, he designed and built a 100-kilowatt nuclear reactor unit, the first of its class.

The reactor unit is coupled to a high efficiency helium gas turbine which in turn drives a generator for the production of electricity.

The first two reactor units of Pickering A originally used Zircaloy-2 pressure tubes.

The anticipated total amount of conditioned wastes that will require disposal is less than 50 m per year for one reactor unit.

The sarcophagus stands at the far end of the plant, sharing a divider wall with the third reactor unit, which is still operating.

After corrections were made, the authority restarted the second and third reactor units in 1991 and 1996.

The Fukushima nuclear disaster revealed the dangers of building multiple nuclear reactor units close to one another.

On 21 February 2013 a greenling - 38 centimeters long and weighing 564 grams - was caught near a water intake of the reactor units.

The remains of reactor unit 4 will remain radioactive for some time.

In late 2011 and early 2012, construction of four new nuclear reactor units at two exiting plants were approved, the first such in 34 years.