Electrical - std60030151

DOE-STD-6003-96

11. Trolley travel--An interlock at a predetermined operational trolley travel limit.

12. Slack cable--An interlock actuated at a loss of cable load to prevent further

downward travel.

13. Translation Inhibit--An interlock to prevent bridge or trolley movement unless its

associated hoist is at or above a predetermined operational up position.

14. Robotic systems--Provide with intelligent systems to avoid known structures and

obstacles. This may include direct sensing of obstacles or knowledge-based sys-

tems that have been preloaded with the location of obstacles.

15. Remotely controlled systems--Provide with a backup means of safe release of

attached radiological hazardous materials, to facilitate remote recovery of failed

remote-handling equipment for repair.

16. Redundancy of critical controls--Prevent single-mode control failure of remote or

robotic equipment, causing unplanned or unanticipated equipment motion.

17. Equipment maintenance--Provide maintenance of anticipated large-capacity

remote or robotic equipment in the presence of personnel, without creating impact

hazard to the personnel. It is anticipated that most equipment will require a mini-

mum of maintenance functions while energized, typical of robotic systems. This

must be provided for in a personnel-safe manner.

18. RF control--The expected high presence of RF and magnetic fields during both

normal and off-normal operation should not create hazards to personnel through

unplanned movements or other means.

Remote-handling system controls that, on failure, can cause either (1) a system to per-

form unintended motions or (2) a system to fail in a nonrecoverable mode should be redundant.

Manual bypasses for interlocks may be supplied at the discretion of the designer.

e. Electrical

The remote systems should be designed to the equivalent of the NFPA Class 1,

Division 1 requirements. It is assumed, but not required, that this would be met with the

pressurized, interlocked systems approach.

Wiring should be resistant to radiation damage. Cabling should be protected from physi-

cal hazards.

Cabling should be adequately shielded from any high magnetic and RF fields it is

expected to encounter. The shielding should be such that the equipment serviced by that

cabling is adequately protected from cabling-induced interference.

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