Dilute chemical decontamination program. Quarterly report 5, October 1-December 31, 1978
The nominal concentrations for oxalic acid and citric acid were selected to be 0.01 and 0.005 M, respectively; the process conditions were selected to be pH3 and 90/sup 0/C with a controlled dissolved oxygen concentration. Additions of acridine, EDTA, and HEDTA with rapid regeneration were not successful in preventing the formation of ferrous-oxalate films on carbon steel surfaces. Control of the dissolved oxygen at an intermediate level prevents ferrous-oxalate precipitation but allows for the highest dissolution rate of fuel deposits. Six mini-loop tests indicated that no measurable quantities of ferrous oxalate will be left on steel surfaces at the end of a decontamination .20 to 50% of the Co-60 in the ferrous-oxalate films will be released during the purification process; however, the resulting iron oxide film will retain some of the Co-60. The data from the Vallecitos Nuclear Center (VNC) test loop run conducted with 0.02 M oxalic acid were analyzed. The Co-60 concentrations in solution were calculated for the mini-loop runs and the VNC test loop runs using the modified regeneration equation and were in agreement with measurement. A corrosion loop test was conducted to evaluate the effects of 0.02 M oxalic acid on 10 alloys or metallurgical conditions. Corrosion rates were acceptably low.
- Research Organization:
- General Electric Co., San Jose, CA (USA). Nuclear Engineering Div.
- DOE Contract Number:
- AC02-76ET34203
- OSTI ID:
- 6405071
- Report Number(s):
- DOE/ET/34203-41; NEDC-12705-5; ON: DE81025690
- Country of Publication:
- United States
- Language:
- English
Similar Records
Dilute chemical decontamination program. Quarterly report 3, April 1-June 30, 1978. Report NEDC-12705-3
Dilute chemical decontamination program. Quarterly report 2, January-March 1978
Related Subjects
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
ACRIDINES
ALLOYS
AMINO ACIDS
AZINES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BWR TYPE REACTORS
CARBON STEELS
CARBOXYLIC ACID SALTS
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL REACTIONS
CITRIC ACID
CLEANING
COBALT 60
COBALT ISOTOPES
COOLANT LOOPS
COOLING SYSTEMS
CORROSION
DECONTAMINATION
DICARBOXYLIC ACIDS
DISSOLUTION
EDTA
ENERGY SYSTEMS
FILMS
HEDTA
HETEROCYCLIC COMPOUNDS
HYDROXY ACIDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IRON ALLOYS
IRON BASE ALLOYS
IRON COMPOUNDS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
ODD-ODD NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXALATES
OXALIC ACID
PYRIDINES
RADIOISOTOPES
REACTORS
RESEARCH PROGRAMS
STEELS
TRANSITION ELEMENT COMPOUNDS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WATER TREATMENT
YEARS LIVING RADIOISOTOPES