Ventilation - HDBK-1145-2001new0049

Radiological Safety Training for Plutonium Facilities

DOEHDBK11452001

Instructor's Guide

The room that encloses the primary system

and is intended to provide containment if the

primary fails is called secondary

containment. The building that encloses the

systems is the final barrier.

2. Ventilation

Maintaining proper airflow is essential for the

safe operation of a plutonium facility. Air

flows from regions of high pressure to

regions of low pressure. Ventilation systems

are engineered so that air flows from areas

of low contamination to areas of greater

contamination. Air balance is maintained by

using damper controls, air locks, and backup

safety systems. Air balance is also

maintained by controlling the position of the

inside doors. Ventilation control doors

should not be blocked open, or

ventilation balance could be lost. Also,

do not operate any equipment unless you May need to use site-specific

terminology.

have been trained and authorized to do

so.

Devices such as tents or glovebags are

used to provide local containment for

maintenance activities. These containments

normally have local ventilation and exhaust

filtration. A bagless transfer system for

moving items out of gloveboxes has been

developed for use throughout the complex.