Comparison of Nozzles and Flow Straighteners for Tank Waste Sluicing Applications

摘要

The purpose of these tests was to provide quantitative and qualitative comparisons for several different sluice nozzle/flow straightener combinations to support past qualitative reviews and observations and to provide information that may be useful for future deployment of in-tank sluicing systems on the Hanford site. The specific tests were designed to assess the relative coherence of water streams produced by each different nozzle and flow straightener combination. The assessments presumed applicability for sluicing waste from underground storage tanks. The criteria for comparison were impact force produced by the stream impinging on a target plate at various distances from the nozzle and coherence of the streams demonstrated by the variation of force on two different size targets. As a result of these tests, it was determined that the standard Hanford flow straightener is measurably less effective than a commercial fire fighting flow straightener at producing a coherent stream when used with the stamdard Hanford nozzle and that a lighter and more compact fire fighting deluge nozzle will deliver a stream of equal coherence to that from the Hanford nozzle when either nozzle is used with the commercial flow straightener. In conclusion, the data contained in this report supports a recommendation to update the Hanford sluicing nozzle and flow straightener components to utilize commercially developed and proven designs.