Solidification of ICPP actinide partitioning solutions

Technical Report · Mon Sep 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/6890370· OSTI ID:6890370

Schuman, R. P.

An extensive literature survey has been made of possible methods of solidifying the rare earths and actinides in the solutions from the actinide partitioning columns, and several simple experiments have been run. If both actinides and lanthanides are to be solidified together, direct oxalate precipitation from mildly acid strip solution appears most promising. Oxalate will precipitate Np(IV), Pu(III or IV) and Am(III) from the NH/sub 2/OH.HNO/sub 3/ plus dilute HNO/sub 3/ strip solution. Direct evaporation of the solution on a glass frit also appears promising if glass is the final waste form. Many inactive simulated waste glasses have been prepared and leach tested; highly durable glasses can be prepared at 1100/sup 0/C. Inorganic titanate, HTi/sub 2/O/sub 5//sup -/, ion exchanger efficiently sorbs Np and Pu from neutralized strip solution but not from the acid strip solution. Titanate can be pressed to give a durable ceramic waste form.

• Research Organization: Exxon Nuclear Idaho Co., Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-79ID01675
• OSTI ID: 6890370
• Report Number(s): ENICO-1062
• Country of Publication: United States
• Language: English

Related Subjects

052001* -- Nuclear Fuels-- Waste Processing
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
CARBOXYLIC ACID SALTS
ELEMENTS
EVAPORATION
GLASS
ION EXCHANGE
MANAGEMENT
METALS
OPIX PROCESS
OXALATES
PHASE TRANSFORMATIONS
PRECIPITATION
PROCESSING
RADIOACTIVE WASTE PROCESSING
RARE EARTHS
SEPARATION PROCESSES
SOLIDIFICATION
WASTE MANAGEMENT
WASTE PROCESSING