Placing Equipment in Service

DOE-STD-1036-93

4.2.2

Placing Equipment in Service

Whenever nuclear safety, ES&H, or mission critical equipment is placed

in service, or returned to service following maintenance, testing, or an

extended shutdown, independent verification should be performed.

Listed below are some of the reasons for performing independent

verification when placing equipment in service.

C When equipment has been out of service for maintenance, the

position of components within the lockout/tagout boundary could

have been changed during maintenance.

C Components that have been involved in a test may have been left in

the test position and not reconfigured for operation.

C During extended shutdowns, it is often impractical to maintain

equipment in its normal operating configuration.

C Startup activities may involve overlapping procedures for the lineup

or testing of multiple interfacing systems, possibly resulting in

uncertainty as to whether the final position of components is correct.

Independent verification at the time equipment is returned to service is

not the same as, nor intended to take the place of, post-maintenance

testing. Post-maintenance testing is normally required for all facility

equipment, whereas independent verification normally is not required on

non-critical, non-safety equipment. In some limited situations,

post-maintenance testing of critical or safety systems may satisfy a

requirement for independent verification. However, the programs and

criteria remain separate. Further information regarding post-maintenance

testing is contained in DOE Order 5480.19, Chapter VIII, "Control of