Author: G.F. MolenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Dissolution of Plutonium Oxide
Author: G.F. MolenDissolution of Plutonium Oxide in Nitric Acid at High Hydrofluoric Acid Concentrations
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The dissolution of plutonium dioxide in nitirc acid (HNO3) at high hydrofluoric acid (HF) concentrations has been investigated. Dissolution rate curves were obtained using 12M HNO3 and HF at concentrations varying from 0.05 to 1.0 molar. The dissolution rate increased with HF concentration up to 0.2M and then decreased at higher concentrations. There was very little plutonium dissolved at 0.7 and 1.0M HF because of the formation of insoluble PuF4. Various oxidizing agents were added to 12M HNO3-1M HF dissolvent to oxidize Pu(IV) to Pu(VI) and prevent the formation of PuF4. Ceric (Ce(IV)) and silver (Ag(II)) ions were the most effective in dissolving PuO2. Although these two oxidants greatly increased the dissolution rate, the rates were not as rapid as those obtained with 12M HNO3-0.2M HF.
Dissolution of Plutonium Oxide in Nitric Acid at High Hydrofluoric Acid Concentrations
Author: Armen R. KazanjianRecovery of Plutonium from Incinerator Ash
Author: F. E. ButlerDISSOLUTION OF PLUTONIUM OXIDE.
Author: Dissolution of High-fired Plutonium Oxide
Author: Plutonium Oxide Dissolution
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Several processing options for dissolving plutonium oxide (PuO2) from high-fired materials have been studied. The scoping studies performed on these options were focused on PuO2 typically generated by burning plutonium metal and PuO2 produced during incineration of alpha contaminated waste. At least two processing options remain applicable for dissolving high-fired PuO2 in canyon dissolvers. The options involve solid solution formation of PuO2 With uranium oxide (UO2) and alloying incinerator ash with aluminum. An oxidative dissolution process involving nitric acid solutions containing a strong oxidizing agent, such as cerium (IV), was neither proven nor rejected. This uncertainty was due to difficulty in regenerating cerium (IV) ions during dissolution. However, recent work on silver-catalyzed dissolution of PuO2 with persulfate has demonstrated that persulfate ions regenerate silver (II). Use of persulfate to regenerate cerium (IV) or bismuth (V) ions during dissolution of PuO2 materials may warrant further study.
A Review of the Dissolution of Plutonium Dioxide
Author: W. S. GilmanPublisher:
ISBN:
Category : Bibliography
Languages : en
Pages : 14
Book Description
Method for Dissolving Plutonium Oxide with HI and Separating Plutonium
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
PuO.sub. 2 -containing solids, particularly residues from incomplete HNO.sub. 3 dissolution of irradiated nuclear fuels, are dissolved in aqueous HI. The resulting solution is evaporated to dryness and the solids are dissolved in HNO.sub. 3 for further chemical reprocessing. Alternatively, the HI solution containing dissolved Pu values, can be contacted with a cation exchange resin causing the Pu values to load the resin. The Pu values are selectively eluted from the resin with more concentrated HI.
In Vitro Dissolution of Respirable Aerosols of Industrial Uranium and Plutonium Mixed-oxide Nuclear Fuels
Author: A. F. EidsonPublisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 32
Book Description