scholarly journals Final Report - Gas Generation Testing of Uranium Metal in Simulated K Basin Sludge and in Grouted Sludge Waste Forms

2004 ◽  
Author(s):  
Calvin H Delegard ◽  
Andrew J Schmidt ◽  
Rachel L Sell ◽  
Sergei I Sinkov ◽  
Samuel A Bryan ◽  
...  
Keyword(s):  
Final Report ◽  
Gas Generation ◽  
Uranium Metal ◽  
Waste Forms ◽  
Sludge Waste

scholarly journals Gas Generation Testing of Uranium Metal in Simulated K Basins Sludge and Grouted Sludge Waste Forms

2004 ◽  
Author(s):  
Calvin H Delegard ◽  
Andrew J Schmidt ◽  
Rachel L Sell ◽  
Sergei I Sinkov ◽  
Samuel A Bryan
Keyword(s):  
Gas Generation ◽  
Uranium Metal ◽  
Waste Forms ◽  
Sludge Waste

Generation Mechanism of Hydrogen Gas from Hardened Cement Paste by γ-Irradiation

1994 ◽  
Vol 353 ◽  
Author(s):  
K. Noshita ◽  
T. Nishi ◽  
M. Matsuda
Keyword(s):  
Hydrogen Generation ◽  
Hydrogen Gas ◽  
Generation Rate ◽  
Hardened Cement ◽  
Gas Generation ◽  
Γ Irradiation ◽  
Waste Forms ◽  
Two Factors ◽  
G Value ◽  
Hydrogen Radicals

AbstractHydrogen gas is generated from cementitious waste forms by radiolysis of water. In the case of low level radioactive waste, gas yields have been confirmed to be sufficiently low by irradiation experiments. However, studies have suggested that the hydrogen generation rate in cementitious waste forms is larger than the rate calculated from the g-value (H2 yields for 100eV absorbed). In this paper, the factors that increase the gas generation were investigated quantitatively. Two factors were identified, the effect of an organic diethylene glycol which reacts with hydrogen radicals to produce hydrogen, and the effect of electrons generated in the cementitious matrix which decompose water to hydrogen. The hydrogen generation rate was confirmed to drop less than the rate calculated from the g-value when these factors were eliminated.

Leach Tests of Simulated Low-Level Transuranic Waste Forms Containing Transuranic Elements

1982 ◽  
Vol 15 ◽  
Author(s):  
Jane M. Welch ◽  
Claude W. Sill ◽  
John E. Flinn
Keyword(s):  
Alpha Spectrometry ◽  
Soil Samples ◽  
Deionized Water ◽  
The Other ◽  
Low Level ◽  
Rocky Flats ◽  
Leach Rate ◽  
Waste Forms ◽  
Sludge Waste ◽  
Transuranic Waste

ABSTRACTSimulations of waste forms that might be produced by slagging pyrolysis incineration of low-level transuranic (TRU) wastes stored at the Idaho National Engineering Laboratory (INEL) have been fabricated containing the transuranic isotopes 237Np, 239pu, 24lAm, 244Cm at levels of approximately 1 μCi per gram of each.Leach tests were performed using frit and vitrified monolithic specimens of average INEL TRU waste, portland cement monoliths made with frit as aggregate, and vitrified monoliths of INEL soil and simulated Rocky Flats sludge. Static leach tests were performed at 90, 70, 40, and 25°C in deionized water for up to 364 days. Leachates were analyzed for the TRU elements by alpha spectrometry. The following generalizations can be made:1. Cemented frit and vitrified sludge waste forms produce leachates with the highest pHs (>11) and have the lowest TRU leach rates, 10−4 g/m2.d at 90°C.2. Neptunium has a higher leach rate than the other three TRU elements by as much as two orders of magnitude for all waste forms tested except cemented frit.3. Only the vitrified soil samples display a marked temperature dependence for leach rates of all four TRU elements.

Dissolution of uranium metal without hydride formation or hydrogen gas generation

2008 ◽  
Vol 378 (3) ◽  
pp. 299-304 ◽  
Author(s):  
Chuck Soderquist ◽  
Bruce McNamara ◽  
Brian Oliver
Keyword(s):  
Hydrogen Gas ◽  
Gas Generation ◽  
Uranium Metal ◽  
Hydride Formation

scholarly journals NEUTRON MULTIPLICATION IN A MASS OF URANIUM METAL. Final Report--Problem Assignment 307-x10P Small Experiment

1944 ◽  
Author(s):  
J E Brolley ◽  
F J Byerley ◽  
B Feld ◽  
A E Olds ◽  
R Schalettar ◽  
...  
Keyword(s):  
Final Report ◽  
Uranium Metal ◽  
Neutron Multiplication

scholarly journals Final report on cermet high-level waste forms

1981 ◽  
Author(s):  
E.H. Kobisk ◽  
T.C. Quinby ◽  
W.S. Aaron
Keyword(s):  
High Level Waste ◽  
Final Report ◽  
Waste Forms ◽  
High Level

LiNO3 Addition to Cement Which Prevents Aluminum Corrosion

1997 ◽  
Vol 506 ◽  
Author(s):  
T. Matsuo ◽  
T. Izumida ◽  
M. Hironaga ◽  
Y. Horikawa ◽  
T. Shiomi
Keyword(s):  
Underground Water ◽  
Hydrogen Gas ◽  
Disposal Site ◽  
Chemical Analyses ◽  
Metallic Aluminum ◽  
Gas Generation ◽  
Water Penetration ◽  
Waste Forms ◽  
Aluminum Corrosion ◽  
Land Disposal

ABSTRACTLiNO3 addition to cement was examined to prevent hydrogen gas generation from metallic aluminum in dry active wastes during waste solidification and under circumstances of underground water penetration into the land disposal site. And its reaction mechanism was identified by some chemical analyses. The volume of the hydrogen gas generation with LiNO3 addition was 10% as much as that without LiNO3, by formation of the insoluble Li-Al preservation film on aluminum. After the land disposal of waste forms, LiNO3 would be expected to be effective to prevent aluminum corrosion as long as the cement forms keep their alkaline character, and when it became ineffective, the circumstances around the waste forms can be made less corrosive for aluminum. The aluminum corrosion at that time would be as much as 10% of that without LiNO3 addition.

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