Determination of Activity Concentration of Natural Radionuclides and Radiation Hazards’ Assessment of Building Materials in High Background Radiation Areas of Homa and Ruri, Kenya

Table 5

Comparison of the average activity concentrations of²²⁶Ra, ²³²Th, and ⁴⁰K, Ra_eq, and AEDR in Homa, Ruri, and other HBRA regions in Kenya and others around the world.

Region	Country	Activity concentration (Bq/kg) ^226Ra			Raeq (total) (Bq/kg) ^232Th	AEDR (mSv/y) ^40K	Reference
Homa	Kenya	129	399	894	767	1.7	This work
Ruri	Kenya	111	1094	489	1713	3.9	This work
Mrima	Kenya	134	431	249	—	1.8	[8]
Ramsar	Iran	179	29	202	144	—	[11]
Nile Delta	Egypt	107	201	116	404.8	—	[20]
Kanyakumari	India	31	206	1590	437	0.9	[21]