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|  DOE-HDBK-6004-99
4. Equipment should be located in areas accessible for operation, testing, inspection, and
maintenance. Where this is not possible, a means of safely retrieving the equipment to a safe area
should be provided. This must include backup methods of safely disconnecting from radiological
hazardous materials, for which the remote equipment is intended.
5. Control panels should be located to afford the operator a full view of the equipment.
6. Equipment should fail safe upon the loss of motive power.
7. Safety features should be incorporated such that failure of one of the drive mechanisms or any
component of the equipment will not result in exposure of personnel to radiation in excess of 2.5
mrem/hr while recovering from such failure.
8. Redundancy of critical controls should be provided to prevent single mode control failure of
remote or robotic equipment causing unplanned or unanticipated equipment motion.
9. The expected high levels of radio frequency and magnetic interference potentially present should
not interfere with control systems or the normal operation of systems.
10. The presence of large quantities of cryogenic materials during both normal and off-normal
conditions must be considered in the design of remote equipment.
11. Design should provide radiation shields between the fusion facility and the remote handling
system components in order to reduce exposure to the system components.
Structural Design
The design, fabrication, testing, and inspection of safety-class and safety-significant remote handling
equipment should be in accordance with commercial codes and standards applicable to that particular
type of equipment. The majority of the systems and components should be considered as non-
nuclear-safety (NNS) and should be designed and fabricated to industrial standard requirements. The
design allowables for safety-class or safety-significant remote handling systems and components
should be in accordance with codes identified in Section o, Design Guidance for Typical Systems.
Allowable design stresses in mechanical components should provide a factor of safety of 5 when
under rated load. Brittle fracture and fatigue during all operation and testing conditions should be
design considerations.
Joint and weld details should be designed to prevent lamellar tearing.
Materials
Materials of construction for equipment in the fusion facility are affected by a unique combination of
hazards. Major concerns are the activation of materials by the intense neutron bombardment , the
degradation of materials by all forms of radiation, and the contamination of surfaces from the transfer
of radiological materials.
Activation and degradation issues should be addressed by careful choice of materials. Replaceable
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