And when more than a few of those helium sources are shut down for maintenance and repair, as they have been over the last few months, helium shortages can occur.

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Since the earthquake, all reactors that were shut down for regular maintenance have been kept offline for inspections.

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The government also wants to restart nuclear power plants that have been shut down for scheduled maintenance but are now in limbo.

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What SBC questioned was why oil and gas companies shut down their turbines for maintenance roughly twice a year while airlines only maintained their turbines one every couple years.

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The LHC shut down last month for a long staycation full of maintenance and upgrades.

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As a former nuclear submarine officer, he once awoke to alarms and flooding, which shorted out most circuits and caused the reactor to shut down (the backup diesel generators were offline for maintenance).

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