Chalk River reactor restart delayed

The reactor, which supplies a third of the world's medical isotopes, was shut down in May after a small leak of heavy water was found.

The facility was originally scheduled to return to service some time in March.

AECL said the first medical isotopes, a very small quantity of radioactive material used to perform imaging tests, would be delivered about 10 days after the plant is restarted.

AECL was not immediately available for comment.

The shortage of isotopes has forced doctors around the world to reschedule or cancel medical procedures and sent companies such as Canada's MDS Inc , whose Nordion division depends on Chalk River for the bulk of its isotopes, to scramble for new supply sources.

Earlier, MDS repeated that it expects a $4-million a month hit to earnings before interest, taxes, depreciation and amortization, or EBITDA, because of the shutdown.