Investigations of Au-198 as radiotracer in laboratory porous media using gamma camera: a preliminary study

International Nuclear Science, Technology and Engineering Conference 2017

原子能学

Othman, N.^1 ; Wan Kamal, W.H.B.^2 ; Yusof, N.H.^1 ; Engku Chik, E.M.F.^1 ; Yunos, M.A.S.^1 ; Adnan, M.A.K.^1 ; Shari, M.R.^1

Plant Assessment Technology, Industrial Technology Division, Malaysian Nuclear Agency, Selangor Kajang

43000, Malaysia^1

Medical Technology Division, Malaysian Nuclear Agency, Selangor Kajang

43000, Malaysia^2

关键词: Bed rocks;    Fluid saturations;    Gamma cameras;    Gamma emitters;    Gold wire;    Grain size;    Half lives;    Quantitative determinations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/298/1/012013/pdf
DOI  :  10.1088/1757-899X/298/1/012013

来源: IOP

【 摘 要 】

Preliminary experiment has been carried out using irradiated Au-198 as radiotracer inside the laboratory porous media. The objectives are to check the compatibility of Au-198 as the radiotracer inside the porous media as well as to provide insights of fluid hydrodynamics inside the media using gamma camera.198Au is gamma emitter isotope with half-life of 2.7 days and energy of 0.41 MeV (99%). The porous media consists of fine sandstone with grain size 850μm, lubricant as the mimic of original oil in plant (OOIP) or trapped oil and a layer of cement on top of the rig as the bed rock. Gamma camera is arranged next to the porous media in order to capture the movement of radiotracer which has been set to 1minute per frame. Initially, the gold wire which has isotope of 197Au was irradiated inside the rotary rack of Reactor Triga PUSPATI (RTP) to produce 198Au. RTP is located in Nuclear Malaysia, Bangi has energy of 750kW and neutron flux of 5 × 102 n/cm2/s. 198Au, which is in liquid form, is injected inside the porous media and monitored and recorded by gamma camera. The gamma camera gives a quantitative determination of local fluid saturations over the area of observation.