TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Process: Radiation opaque equipment enclosure is purged with gas. Protecting material processing equipment further involves exchanging the gas in the equipment enclosure at an exchange rate of less than once every 10 minutes. The method further includes moving the equipment enclosure to access the motors components. Exposure of the motor components to radiation is reduced by at least 10% as compared to the radiation exposure that would occur without the equipment enclosure. The method further involves providing a gap between the equipment enclosure and the vibratory conveyor to accommodate movement of components of the vibratory conveyor during use. The exposure of the motor components to radiation is reduced by at least 20% as compared to the radiation exposure that would occur without the equipment enclosure; the exposure of the motor components to radiation is reduced by at least 30% as compared to the radiation exposure that would occur without the equipment enclosure; the exposure of the motor components to radiation is reduced by at least 50% as compared to the radiation exposure that would occur without the equipment enclosure; the exposure of the motor components to radiation is reduced by at least 70% as compared to the radiation exposure that would occur without the equipment enclosure; or the exposure of the motor components to radiation is reduced by at least 90% as compared to the radiation exposure that would occur without the equipment enclosure. Preferred Components: The gas is selected from air, oxygen reduced air, nitrogen, argon, helium, carbon dioxide, and its mixtures. The gas comprises air. Preferred Device: The conveyor is disposed within a vault, where the vault also contains irradiating equipment. The gas is provided from within the vault and the method further comprises filtering the gas prior to purging the equipment enclosure with the gas. The gas has been filtered to remove ozone. The equipment enclosure is configured to be movable. It includes lead. The conveyor is a vibratory conveyor. The gap is maintained by fixing the equipment enclosure relative to the conveyor using a stop, a groove, a spacer and/or a fastener. The system further includes a conduit configured for flowing a purging gas into the equipment enclosure. It comprises equipment for moving the equipment enclosure into and out of position over the conveyor components. The equipment is selected from wheels attached to the equipment enclosure, tracks for sliding the equipment enclosure, wheels disposed below the equipment enclosure (e.g., attached to the ground), sliders (e.g., slide rails), linear guides and its combinations. The components comprise the conveyor and the ancillary conveyor parts. EXAMPLE - No suitable example given.