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Title: Tank 26 Evaporator Feed Pump Transfer Analysis

Abstract

The transfer of liquid salt solution from Tank 26 to an evaporator is to be accomplished by activating the evaporator feed pump, located approximately 72 inches above the sludge layer, while simultaneously turning on the downcomer. Previously, activation of the evaporator feed pump was an isolated event without any other components running at the same time. An analysis of the dissolved solution transfer has been performed using computational fluid dynamics methods to determine the amount of entrained sludge solids pumped out of the tank to the evaporator with the downcomer turned on. The analysis results showed that, for the maximum and minimum supernate levels in Tank 26 (252.5 and 72 inches above the sludge layer, respectively), the evaporator feed pump will entrain between 0.03 and 0.1 wt% sludge undissolved solids weight fraction into the eductor, respectively, and therefore are an order of magnitude less than the 1.0 wt% undissolved solids loading criteria to feed the evaporator. Lower tank liquid levels, with respect to the sludge layer, result in higher amounts of sludge entrainment due to the increased velocity of the plunging jets from the downcomer and evaporator feed pump bypass as well as decreased dissipation depth. Revision 1 clarifies themore » analysis presented in Revision 0 and corrects a mathematical error in the calculations for Table 4.1 in Revision 0. However, the conclusions and recommendations of the analysis do not change for Revision 1.« less

Authors:
; ;
Publication Date:
Research Org.:
Savannah River Site (SRS), Aiken, SC
Sponsoring Org.:
USDOE
OSTI Identifier:
947194
Report Number(s):
SRNS-TR-2008-00026
TRN: US0901426
DOE Contract Number:  
DE-AC09-08SR22470
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; COMPUTERIZED SIMULATION; EVAPORATORS; PUMPS; WASTE RETRIEVAL; FLUID MECHANICS; SLUDGES; RADIOACTIVE WASTES; HYDRAULIC TRANSPORT; ENTRAINMENT; SOLIDS

Citation Formats

Tamburello, David, Dimenna, Richard, and Lee, Si. Tank 26 Evaporator Feed Pump Transfer Analysis. United States: N. p., 2009. Web. doi:10.2172/947194.
Tamburello, David, Dimenna, Richard, & Lee, Si. Tank 26 Evaporator Feed Pump Transfer Analysis. United States. https://doi.org/10.2172/947194
Tamburello, David, Dimenna, Richard, and Lee, Si. 2009. "Tank 26 Evaporator Feed Pump Transfer Analysis". United States. https://doi.org/10.2172/947194. https://www.osti.gov/servlets/purl/947194.
@article{osti_947194,
title = {Tank 26 Evaporator Feed Pump Transfer Analysis},
author = {Tamburello, David and Dimenna, Richard and Lee, Si},
abstractNote = {The transfer of liquid salt solution from Tank 26 to an evaporator is to be accomplished by activating the evaporator feed pump, located approximately 72 inches above the sludge layer, while simultaneously turning on the downcomer. Previously, activation of the evaporator feed pump was an isolated event without any other components running at the same time. An analysis of the dissolved solution transfer has been performed using computational fluid dynamics methods to determine the amount of entrained sludge solids pumped out of the tank to the evaporator with the downcomer turned on. The analysis results showed that, for the maximum and minimum supernate levels in Tank 26 (252.5 and 72 inches above the sludge layer, respectively), the evaporator feed pump will entrain between 0.03 and 0.1 wt% sludge undissolved solids weight fraction into the eductor, respectively, and therefore are an order of magnitude less than the 1.0 wt% undissolved solids loading criteria to feed the evaporator. Lower tank liquid levels, with respect to the sludge layer, result in higher amounts of sludge entrainment due to the increased velocity of the plunging jets from the downcomer and evaporator feed pump bypass as well as decreased dissipation depth. Revision 1 clarifies the analysis presented in Revision 0 and corrects a mathematical error in the calculations for Table 4.1 in Revision 0. However, the conclusions and recommendations of the analysis do not change for Revision 1.},
doi = {10.2172/947194},
url = {https://www.osti.gov/biblio/947194}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Feb 11 00:00:00 EST 2009},
month = {Wed Feb 11 00:00:00 EST 2009}
}