It would be serious. That is why units go underground and several independent safeguards make it extremely unlikely.
Michael Pratt, CEO · Pulsar demo, 23 Sep
The full answer
It would be a serious event. A fully charged rotor holds a large amount of energy, and a catastrophic failure would release it very quickly inside the vacuum enclosure. The housing is not designed to contain all of that energy, which is why the Q500 is designed to be installed underground, where the surrounding soil absorbs it.
The main strategy is making such a failure extremely unlikely, with independent layers. The rotor is designed for 13,000 rpm but cannot run above 11,100 rpm. Vibration and the rotor's harmonic signature are monitored continuously, so a change in balance or structure triggers a controlled shutdown. Two mechanical bearing systems back up the magnetic bearings. No one is allowed inside the enclosure while it runs.
Pulsar is currently limited to low speeds while the test cell for high-speed testing is finished.
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