Effluent Control - hdbk1132990062

DOE-HDBK-1132-99

Stack monitoring systems should have central (i.e., control room or

radiation monitoring office) readout and alarm panels that are accessible

after an accident to evaluate internal conditions. Such data are useful for

designing the most appropriate and efficient response to a release-

related incident.

Radiation monitoring, alarm, and warning systems that must function

during a loss of normal power should be provided with an emergency

UPS (internal or external on-line). However, if it is demonstrated that

these systems can tolerate a temporary loss of function without losing

needed data and these systems are provided with standby or emergency

(switched) power, the emergency UPS is not necessary. Determination

of the power supply type and quality, including availability during and

after events, should be based on the safety classification of the

monitoring system or device. Emergency backup power systems are

critical to the operation of monitoring, alarm, and warning systems in the

case of a simultaneous power failure and radioactive release.

I-46