Electrical - hdbk60040110

DOE-HDBK-6004-99

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 should be provided with intelligent systems to avoid known structures and

obstacles. This may include direct sensing of obstacles or knowledge based systems that have

been preloaded with the location of obstacles.

15. Remotely controlled systems should be 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 should be provided to prevent single mode control failure of

remote or robotic equipment causing unplanned or unanticipated equipment motion.

17. Provision should be made for maintenance of anticipated large capacity remote or robotic

equipment in the presence of personnel, without creating impact hazard to the personnel. It is

anticipated the most equipment will require a minimum of maintenance functions while energized,

typical of robotic systems. This must be provided for in a personnel safe manner.

18. The expected high presence of radio frequency and magnetic fields during both normal and off

normal operation should not create hazards to personnel through unplanned movements or other

means.

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

Electrical

The remote maintenance systems should be designed to the equivalent of the National Fire Protection

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

with the pressurized, interlocked systems approach.

Function Protection for Natural Phenomena

Safety functions should be assured for loads from natural phenomena. Design should provide for

protection of safety-class equipment and systems from potential failure of non-safety-class hardware

during natural phenomena events.

Tests and Inspections

Provisions should be made for the periodic tests and inspections of structures, components, and

systems within the remote handling system. The tests and inspections should be performed in

accordance with applicable codes and standards. Provisions should be made in the design of the

equipment to allow testing the following components on a scheduled basis:

1. Electrical Test Capabilities - The design should include provisions to allow testing electrical safety

features and controls to verify at least the following:

2. All limit switches are operable and functioning as required.