An online monitor has been designed, built, and tested, which is capable of measuring the residual transuranic concentrations in processed high-level wastes with a detection limit of 370 Bq/ml (10 nCi/ml) in less than six hours. The monitor measures the neutrons produced by the transuranics, primarily via (?,n) reactions, in the presence of gamma-ray fields up to 1 Sv/h (100 R/h). The optimum design was determined by Monte Carlo modeling and then tempered with practical engineering and cost considerations. Correct operation of the monitor was demonstrated in a hot cell utilizing an actual sample of high-level waste. Results of that demonstration are given, and suggestions for improvements in the next generation system are discussed.
Revised: November 6, 2012 |
Published: February 1, 2005
Citation
Brodzinski R.L., R.A. Craig, S.D. Fink, W.K. Hensley, N.O. Holt, M.A. Knopf, and E.A. Lepel, et al. 2005.An Istrument for Measuring the TRU Concentration in High-Level Liquid Waste.Journal of Radioanalytical and Nuclear Chemistry 263, no. 3:625-628.PNNL-SA-41903.doi:10.1007/s10967-005-0634-8