The procedures cost billions and are usually scheduled to last about 46 months. Refuelling and maintenance of civil reactors takes place more often (usually ev

The procedures cost billions and are usually scheduled to last about 46 months. Refuelling and maintenance of civil reactors takes place more often (usually every 18 to 24 months) and is much quicker - about 45 days, not months). Gen IV reactors even allow for on-line refuelling so the reactor can continue to operate with no down-time.