Structural design - std60030148

DOE-STD-6003-96

3. Allowances should be made for equipment movement so that, in performing

intended operations, safe distances can be maintained from personnel in normally

accessible work areas.

4. Equipment should be operated and stored in areas accessible, or that may be

made accessible, for testing, inspection, and maintenance. Where this is not pos-

sible, a means of safely retrieving the equipment to a safe area should be pro-

vided. This must include backup methods of safely disconnecting from radioactive

or other hazardous materials, for which the remote equipment is intended.

5. The operator should be provided a full view of the remote operation.

6. Equipment should fail safe upon the loss of motive power.

7. 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

excessive radiation 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 equip-

ment motion.

9. The expected high levels of RF 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 consider radiation shields between the fusion device and the

remote-handling system components as necessary to reduce exposure to and

neutron activation of the system components.

b. 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-safety-class and should be designed and fabricated to industrial

standard requirements.

Allowable design stresses in mechanical components should provide a safety factor of at

least 5 when under rated load. Brittle fracture and fatigue during all operation and testing condi-

tions should be design considerations.

Joint and weld details should be designed to prevent lamellar tearing.

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