id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
gc-844	Kim, MoonSu; Kim, Ikhyun; Kim, Hyunkoo; Jo, Hunje; Park, Sunhwa; Hwang, Jongyeon; Kim, Dongsoo; Jo, Seongjin; Kim, Taeseung; Cheong, Hyenmi	Naturally occurring radioactive materials (NORM) in the groundwater of two islands with various geologic settings in South Korea	2018	6	.pdf	application/pdf	3290	138	52	2. MATERIALS AND METHODS In order to define the levels of NORM for uranium-238 and ra- don-222 in groundwater from G island located in the north-west- ern side and from J island located in the southern part of South Korea, a total of 123 CWSs using groundwater as a drinking wa- ter resource had been investigated for 10 years from 2007 to 2016 (NIER-2007, -2008, -2009, -2010, -2011, -2012, -2013, -2014, -2015, -2016). The rocks mainly composed of G island are granitoids and metamor- phic rocks, and the rocks composed of J island are volcanic rocks.	cache/gc-844.pdf	txt/gc-844.txt