Geneva ? The world’s largest atom smasher will likely be fired up again in October after scientists have carried out tests and put in place further safety measures to prevent a repeat of the faults that sidelined the $10 billion machine shortly after startup last year, the operator said Saturday.

The Large Hadron Collider was meant to restart in late September, but that will probably be pushed back two to three weeks, a spokesman for the European Organization for Nuclear Research said.

An electrical fault caused by a faulty splice in the wiring shut down the giant machine on Sept. 19, nine days after it was started up with great fanfare.

The 20-nation operator, known as CERN, expects repairs and additional safety systems to cost about $37 million over several years, Gillies said.