The Dimona reactor, which began its life in 1963, is one of Israel’s most closely guarded secret installations.
A study made public last year found more than 1500 fissures within the reactor core.
Israel is estimated to have more than a hundred nuclear warheads, the plutonium for which comes from its Dimona reactor.
On Sunday, the Nobel Peace Prize will be handed to the International Campaign to Abolish Nuclear Weapons at a ceremony in Oslo.
Al Jazeera’s Harry Fawcett reports from West Jerusalem.
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