Radiological Risk Assessment for French Silo at Al-Tuwaitha Nuclear Research Site

Abstract

The French silo is located at AL-Tuwaitha nuclear research site, it is intended for temporary storage of the radioactive waste with low half-life and low or medium radioactivity. The annual doses are calculated for workers in the silo and also the risk to injury with fated cancer. The concept of a source-related dose constraint was first introduced in International Commission on Radiological Protection (ICPR) publication 60. The idea was to provide a number that individual exposures from a single, specific source should not exceed, and below which optimization of protection should take place. Dose constraints were applied to occupational and public exposures from practices. The points survey (76 points inside the silo and 31 points outside the silo) were measured using the RadEye PRD device for 3 heights (0, 1 and 3m) for each point and the adoption of the height of 1 meter because it is the effective dose on the human. The highest annual dose rate inside the silo was obtained (33.41 mSv/y) at point (9,30) and the doses mean for all points was (2.0653mSv/y) within the range (0.06_33.41), and the highest reading for the risk to injury with cancer was (1.67E-3) at same point and the rate was (1E-4) within range (1.67E-3_17E-6), also the highest annual dose rate outside the silo was obtained (17.45 mSv/y) at point (25, 45) and the doses mean for all points was (0.867mSv/y) within the range (0.035-17.45), and the heights reading for the risk to injury with cancer was (9E-4) at same point and the rate was (4.34E-05) within range (1.73E-6_9E-4).