Operation of the radioactive acid digestion test unit

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The Radioactive Acid Digestion Test Unit (RADTU) has been constructed at Hanford to demonstrate the application of the Acid Digestion Process for treating combustible transuranic wastes and scrap materials. The RADTU with its original tray digestion vessel has recently completed a six-month campaign processing potentially contaminated nonglovebox wastes from a Hanford plutonium facility. During this campaign, it processed 2100 kg of largely cellulosic wastes at an average sustained processing rate of 3 kg/h as limited by the water boiloff rate from the acid feeds. The on-line operating efficiency was nearly 50% on a twelve hour/day, five day/week basis. Following this ... continued below

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Pages: 19

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Blasewitz, A.G.; Allen, C.R.; Lerch, R.E.; Ely, P.C. & Richardson, G.L. January 1, 1980.

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Description

The Radioactive Acid Digestion Test Unit (RADTU) has been constructed at Hanford to demonstrate the application of the Acid Digestion Process for treating combustible transuranic wastes and scrap materials. The RADTU with its original tray digestion vessel has recently completed a six-month campaign processing potentially contaminated nonglovebox wastes from a Hanford plutonium facility. During this campaign, it processed 2100 kg of largely cellulosic wastes at an average sustained processing rate of 3 kg/h as limited by the water boiloff rate from the acid feeds. The on-line operating efficiency was nearly 50% on a twelve hour/day, five day/week basis. Following this campaign, a new annular high rate digester has been installed for testing. In preliminary tests with simulated wastes, the new digester demonstrated a sustained capacity of 10 kg/h with greatly improved intimacy of contact between the digestion acid and the waste. The new design also doubles the heat transfer surface, which with reduced heat loss area, is expected to provide at least three times the water boiloff rate of the previous tray digester design. Following shakedown testing with simulated and low-level wastes, the new unit will be used to process combustible plutonium scrap and waste from Hanford plutonium facilities for the purposes of volume reduction, plutonium recovery, and stabilization of the final waste form.

Physical Description

Pages: 19

Notes

NTIS, PC A02/MF A01.

Source

  • International symposium on the management of alpha-contaminated wastes, Vienna, Austria, 2 Jun 1980

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  • Report No.: HEDL-SA-1967
  • Report No.: CONF-800611-9
  • Grant Number: AC14-76FF02170
  • Office of Scientific & Technical Information Report Number: 5229619
  • Archival Resource Key: ark:/67531/metadc1070194

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1980

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • June 8, 2018, 7:32 p.m.

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Blasewitz, A.G.; Allen, C.R.; Lerch, R.E.; Ely, P.C. & Richardson, G.L. Operation of the radioactive acid digestion test unit, article, January 1, 1980; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1070194/: accessed September 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.