ASSESSMENT OF RADIATION EXPOSURE LEVELS IN SOME SELECTED BUILDINGS IN BAGAJI VILLAGE, KEFFI, NIGERIA

It is observed by both United Nation Scientific Committee on the Effects of Atomic Radiation (UN SC EAR, 2000) and International Cormnission on Radiation Protection (ICRP, 1991) that there could be some exposure in some homes which would require regulatory control but is not really considered. This study is therefore, to assess the ambient outdoor radiation levels of some selected buildings (new and old) in Bagaji village Keffi, Nasarawa State. The inspector alert nuclear radiation meter was used for these assessments, where it was held at the abdominal level and readings were taken in different houses in mR/hr and in count per minute. The exposure levels at ten different houses (new and old) were measured and it was found that the annual dose rate ranges from (1.98±J.09 mSv/yr) to (I.27±J.04 mSv/yr).The exposure rate were converted to annual equivalent dose and annual effective dose rate in order to compare it with the public exposure limits by ICRP, it was found that the annual effect dose rate is between 0.58 mSv/yr - 0.66 mSv/yr for new houses and 0.76 mSv/yr - 0.98 mSv/yr for the old houses which is below the public exposure limits and may not necessarily result to any hazard