No, but why would it be inoperable? I’m not at all sure that the airliner could legally depart with an inoperable radar.
The radar could quit due to the inherent frailties of electronics.
A lightning strike can knock it out.
I have seen photos of big iron with the nose cone blown off by radar.
Above is a photo of hail damage to a radar cone. A radome can be destroyed by hail. Also, it is possible to damage the cone enough to reduce the efficiency.
Apparently they had a major electrical failure. That would require all unnecessary equipment to be taken off line. Whereas radar might be considered necessary, it does rate below the flight instruments and the flight controls.
But I would bet that whatever got the electrical system got the radar at the same time and they had no choice.