Numerical simulation of the PGNA signal from chlorine diffusion gradients in concrete.
A nondestructive test method for detecting chlorides in concrete has been developed based on prompt gamma neutron activation (PGNA). Its performance has been modeled using a hybrid MCNP/optical ray tracing approach. Since the chlorides often come from de-icing salts applied to the concrete surface, the Cl concentration has a non-linear depth profile which is typically modeled by the erfc function. The signals from this distribution have been simulated for several significant Cl capture peaks to estimate the erfc function parameters.
Graduate Program in Nuclear Engineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA. rliving1@umd.edu
Richard A
RA
Livingston
Mohamad
M
Al-Sheikhly
Ali B
AB
Mohamed
D002713:Chlorine / Q000032:analysis* / Q000737:chemistry*; D003198:Computer Simulation; D003252:Construction Materials / Q000032:analysis*; D004058:Diffusion; D008956:Models, Chemical; D009501:Neutron Activation Analysis / Q000379:methods*
D002713:Chlorine