Tests and inspections

DOE-STD-6003-96

Electrical connectors and wiring methods (per National Electric Code definitions, or

equivalent) should be used to minimize repair or replacement time. Sealed, quick-disconnect-

type connectors should be used wherever possible, and individual wiring methods (e.g., terminal

strips) should be avoided. These requirements are intended to minimize the exposure of per-

sonnel related to maintenance.

The wiring count from remote equipment to personnel areas should be minimized. The

failure probability for remote-handling equipment is directly related to the amount of vulnerable

wiring and connectors required from the work area.

Tests and inspections

Provisions should be made to allow testing on a scheduled basis in accordance with

applicable codes and standards to verify the following:

Limit switches are operable and functioning as required.

Controlling signals from sensing devices are within specifications.

Control switches are operable.

Indicating instrumentation is operable and within specified accuracy.

Annunciators are operable as specified.

Electrical interlocks are operable and functioning as required.

Load cells are performing properly.

Motors are operable and functioning as required.

Hoists and brakes are functioning correctly.

10.

Any special function is performing properly.

g. Hydrogen fires and detonation

Remote-handling systems should not initiate a fire or detonation in normal or off-normal

conditions in the presence of hydrogen gases. Safety-significant remote-handling systems and

components may fail in a fire or detonation event, but the failure should not degrade the function

of an adjacent safety-class SSC. Safety-class remote-handling equipment should withstand the

effects of design-basis fire or detonation and retain its basic safety functions.

h. Equipment maintenance considerations

Remote-handling equipment will potentially require maintenance while radiologically acti-

vated or contaminated (tritium or other) and should be designed accordingly. Maintenance

requirements should allow for personnel using rubber gloves, plastic suits, or similar personal

protective means. Additionally, the time required to perform maintenance may be directly related

to the resultant exposure of personnel to radiological hazards.

Maintenance methods should allow for rapid replacement of components or modules uti-

lizing quick disconnects for all services. Fasteners should be designed for gloved handling and

be of the captive type if possible.

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