Oak Ridge National Laboratory Environmental and Health Protection Division Representative Airflow Study Technical Basis Document
airflow study; radioactive, contaminants
Bogard, J.S. (Oak Ridge National Laboratory, MMES, Oak Ridge, TN); Butler, H.M.; Forbes, R.J.; Halliburton, R.E.; Hoke, P.B.; Melroy, P.E.; Mlekodaj, R.L.; Row, R.H.; Swanks, J.H.
DOE INFORMATION CENTER 1 Science.gov Way, Oak Ridge, TN 37831; Eva Butler; Phone: 865-241-4780; Toll-Free: 800-382-6938, Option 6; FAX: 865-574-3521; Email: email@example.com
Health, Safety and Environment\Worker Health and Safety; Health, Safety and Environment\Worker Health and Safety
1989 Aug 31
Originating Research Org.:
Oak Ridge National Laboratory
OpenNet Entry Date:
1998 Jun 16
This document provided the technical basis for the airflow study at the Oak Ridge National Laboratory. To minimize workers exposure to radiation and to comply with the U.S. Department of Energy Order 5480.11, "Radiation Protection of Occupational Workers," Oak Ridge National Laboratory established provisions for containment of radioactive materials and monitoring for their presence outside of these barriers. Engineering designs and safety systems are generally invoked to complement proper operational practices in limiting the frequency and severity of exposures of workers to airborne radioactive contamination. Unsealed radioactive sources are confined through the use of such facilities as glove boxes, hot cells and radiochemical hoods. Temporary partitions and tents are also used for this purpose. Facility design features include heating, ventilation and air conditioning (HVAC) provisions for controlling the distribution of airborne materials and removing contaminants from the worker atmosphere. Intake and exhaust airflows can be designed to effect pressure differentials between nearby areas in order to establish preferred directions for migration of potential contaminants. Radioactivity monitors were used to sense the presence of airborne radioactive materials in the area of radioactive sources and in worker areas. These monitors withdraw an air sample and present it to a detector which responds in proportion to the amount of radiation to which it is subjected. The information displayed by the monitor gives the level of radioactive contamination and location of the sample. The closer the sampling point gets to the worker breathing zone, the better the assessment of worker exposure. Separate monitoring provisions may be used to effectively track source and receptor air quality under circumstances in which the hazard or probability of worker exposure is especially high.