Your Cart

Your cart is empty

Home  >  Volume 47 (July 2018)

45. ABSORBED DOSE RATE CONVERSION FACTORS FOR OUTDOOR AND INDOOR EXPOSURE IN TYPICAL NIGERIAN MUD HOUSES by Agbalagba O. E. and Nenuwe N.O. Volume 47 (July, 2018 Issue), pp341– 344
Sale price: $5.00
Quantity:

ABSORBED DOSE RATE CONVERSION FACTORS FOR OUTDOOR AND INDOOR EXPOSURE IN TYPICAL NIGERIAN MUD HOUSES

Agbalagba O. E. and Nenuwe N.O.

Department of Physics, College of Science, Federal University of Petroleum Resources, Effurun, Nigeria

Abstract

This study present the findings of the absorbed dose rate conversion factors computed for external and internal exposure from sources of ionizing radiations in soil/floors and walls of a typical Nigeria mud houses. Two types of mud houses were considered in the study. Calculations were based on the point-kernel build-up factor method. The indoor dose rate in air per unit activity concentrations of 226Ra, 232Th and 40K in soil of infinite depth are 0.442, 0.573 and 0.0423Gyh-1 per Bqkg-1 for mud walls with conical thatched roof building respectively, and 0.647, 0.799 and 0.0676nGyh-1 per Bqkg-1 for mud walls with dome mud roof house respectively. The outdoor dose rate in air per unit activity concentration of 226Ra, 232Th and 40K in soil of infinite depth are 0.401, 0.563 and 0.0397 respectively. The calculated outdoor dose rates results agreed satisfactorily with results of previous calculations that were based on similar assumptions while the indoor exposure values are higher and differ from one building design and material to another. The study recommends that external dose assessment should be based on conversion factors that take into consideration local (mud) building designs in their calculations.

Keywords: Dose Rate Conversion Factor, Mud Houses, Nigeria.

click here to download full Abstract

Close
Loading...