Electromagnetic Loads

DOE-HDBK-6004-99

Electromagnetic Loads

Electromagnetic loads induced during normal pulsed operation of the device are experienced as a

result of eddy currents in the vessel interacting with the magnetic fields crossing them. Loads should

include the electromagnetic effects of discharge cleaning.

1. Electromagnetic Loads During Faults - Electromagnetic loads induced during abnormal operating

events such as control failures, power supply failures, bus opens or shorts, or magnet faults

should be included in the design.

2. Disruption/VDE Loads - Disruption/VDE loads are any thermal or electromagnetic loads induced

in the vessel due to loss of control of the plasma. A range of plasma motions and current

behaviors should be considered to determine the worst case events. Analysis should include

conservative assumptions for event amplitude, time scale, and event frequency.

Interaction Loads

Interaction loads are loads imposed on the vacuum vessel by other components during normal or fault

conditions.

Natural Phenomena Hazard Loads

Natural phenomena hazard loads are site-specific loads due to earthquakes, wind, and floods.

Guidelines for methods of establishing load levels on facilities from natural phenomena hazards and

for methods of evaluating the behavior of structures and equipment to these load levels are contained

in DOE 1020.

Loss-of-coolant Loads

The confinement or containment should be designed to remain functional after a potential loss-of-

coolant to the interior of the vessel including subsequent chemical reactions if this is evaluated as a

design basis accident.

Hydrogen Detonation Loads

The confinement or containment should be designed to remain functional after a potential hydrogen

detonation if this is evaluated as a design basis accident. For guidance on determining if this is a

design basis accident, see Section IV "Design Considerations" within this Vacuum Vessel section.

Site-generated Missile Impact Load

The confinement or containment should be designed to remain functional after a potential missile

impact if this is evaluated as a design basis accident.