Gamma Ray Spectrometric Analysis of Sand Samples from Selected Beaches along Kenyan Coastline

Table 4

Absorbed dose rate, annual effective dose rate, and total annual effective dose rate.

Site	Indoor dose rate (nGy/h)	Outdoor dose rate (nGy/h)	Indoor (AEDR) (mSv/y)	Outdoor (AEDR) (mSv/y)	Total (AEDR) (mSv/y)
Diani-1	202 ± 10	144 ± 7	0.61 ± 0.03	0.22 ± 0.01	0.83 ± 0.04
Diani-2	221 ± 11	160 ± 8	0.67 ± 0.03	0.24 ± 0.01	0.91 ± 0.04
Diani-3	248 ± 12	180 ± 9	0.70 ± 0.03	0.28 ± 0.01	0.94 ± 0.04
Diani-4	183 ± 9	130 ± 6	0.56 ± 0.02	0.20 ± 0.01	0.76 ± 0.03
Diani-5	292 ± 14	210 ± 10	0.89 ± 0.04	0.32 ± 0.02	1.21 ± 0.06
Tiwi-1	253 ± 12	183 ± 9	0.77 ± 0.03	0.28 ± 0.01	1.05 ± 0.05
Tiwi-2	204 ± 10	148 ± 7	0.62 ± 0.03	0.23 ± 0.01	0.85 ± 0.04
Tiwi-3	255 ± 12	184 ± 9	0.78 ± 0.03	0.28 ± 0.01	1.06 ± 0.05
Tiwi-4	265 ± 13	192 ± 9	0.81 ± 0.04	0.29 ± 0.01	1.10 ± 0.05
Tiwi-5	183 ± 9	131 ± 6	0.56 ± 0.02	0.20 ± 0.01	0.76 ± 0.03
Shelly-1	216 ± 10	157 ± 7	0.66 ± 0.03	0.24 ± 0.01	0.90 ± 0.04
Shelly-2	201 ± 10	146 ± 7	0.61 ± 0.03	0.22 ± 0.01	0.83 ± 0.04
Shelly-3	175 ± 8	127 ± 6	0.53 ± 0.02	0.19 ± 0.01	0.72 ± 0.03
Shelly-4	237 ± 11	171 ± 8	0.72 ± 0.03	0.26 ± 0.01	0.98 ± 0.04
Shelly-5	220 ± 11	160 ± 8	0.67 ± 0.03	0.25 ± 0.01	0.92 ± 0.04
Nyali-1	206 ± 10	151 ± 7	0.63 ± 0.03	0.23 ± 0.01	0.86 ± 0.04
Nyali-2	171 ± 8	124 ± 6	0.52 ± 0.02	0.19 ± 0.01	0.71 ± 0.03
Nyali-3	215 ± 10	156 ± 7	0.65 ± 0.03	0.24 ± 0.01	0.89 ± 0.04
Nyali-4	183 ± 9	134 ± 6	0.56 ± 0.02	0.21 ± 0.01	0.77 ± 0.03
Nyali-5	183 ± 9	133 ± 6	0.56 ± 0.02	0.20 ± 0.01	0.76 ± 0.03
Kenyatta-1	209 ± 10	150 ± 7	0.64 ± 0.03	0.23 ± 0.01	0.87 ± 0.04
Kenyatta-2	216 ± 10	156 ± 7	0.66 ± 0.03	0.24 ± 0.01	0.90 ± 0.04
Kenyatta-3	238 ± 11	173 ± 8	0.72 ± 0.03	0.27 ± 0.01	0.99 ± 0.04
Kenyatta-4	186 ± 9	135 ± 6	0.57 ± 0.02	0.21 ± 0.01	0.78 ± 0.03
Kenyatta-5	152 ± 7	110 ± 5	0.46 ± 0.02	0.17 ± 0.007	0.63 ± 0.03
Shanzu-1	219 ± 10	160 ± 8	0.67 ± 0.03	0.25 ± 0.01	0.92 ± 0.04
Shanzu-2	143 ± 7	102 ± 5	0.43 ± 0.02	0.16 ± 0.008	0.59 ± 0.02
Shanzu-3	180 ± 9	131 ± 6	0.55 ± 0.02	0.20 ± 0.01	0.75 ± 0.03
Shanzu4	198 ± 9	144 ± 7	0.60 ± 0.03	0.22 ± 0.01	0.82 ± 0.04
Shanzu-5	150 ± 7	108 ± 5	0.45 ± 0.02	0.17 ± 0.01	0.62 ± 0.03
Average	207 ± 8	150 ± 7	0.63 ± 0.03	0.23 ± 0.01	0.86 ± 0.04
World average [16]	84	54	0.41	0.07