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Project W-236A multi-function waste tank facility waste feed projections

Description: A review of Hanford Underground Waste Storage Tank Chemistry, coupled with planned remediation actions and retrieval sequences was conducted in order to predict the chemistry of the waste to be stored in the MWTF tanks. All projected waste solutions to be transferred to the MWTF tanks were found to be in compliance with current tank chemistry specifications; therefore, the waste and the tank materials of construction are expected to be compatible.
Date: December 22, 1994
Creator: Larrick, A.P.
Partner: UNT Libraries Government Documents Department

Source of process water scandium

Description: Rear face dose rates at the single pass reactors were found to have significantly increased between 1965 and 1967. It was suggested by Battelle-Northwest that an increase in scandium-46 activity may have been a possible cause of the increased dose rates. Battelle-Northwest records showed that considerably more {sup 46}Sc was present in the Columbia River at Richland starting in the summer of 1967 than had been found previously. The ratio of {sup 46}Sc to {sup 65}Zn activity, a correlation which removes seasonal variations in activity, was shown to have increased from 0.1 early in 1967 to l.0 by November of 1967. It was concluded that indeed the {sup 46}Sc release rate from the single pass reactors and the rear face dose es had increased in 1966 and 1967, but not necessarily at the same time {sup 3}. Data presented in the review showed that there had been no changes in parent {sup 45}Sc concentration in the Columbia River between 1962 and 1969, but there had been several changes in water chemistry in 1966 and 1967 which may have contributed to the increased {sup 46}Sc concentration in the reactor effluent. The review document suggested that rear face components be analyzed to verify whether or not the increased {sup 46}Sc concentration in the effluent water was indeed significantly contributing to rear dose rates and that inlet water be analyzed to determine if the increase in {sup 46}Sc was due to the addition of parent {sup 46}Sc with the water treatment chemicals. These analyses have been completed and are presented in this document along with other supporting data.
Date: June 12, 1970
Creator: Larrick, A.P.
Partner: UNT Libraries Government Documents Department

Nonuniform Aluminum Corrosion Program

Description: The purpose of this document is to summarize the status of the current non-uniform aluminum corrosion program. Also included are justifications for and descriptions of program activities which could continue through FY-1971.
Date: February 12, 1969
Creator: Sheppard, D.O. & Larrick, A.P.
Partner: UNT Libraries Government Documents Department

Decontamination studies: Battelle-Northwest Laboratories, December 1964-- August 1965

Description: From ninth meeting of the USAEC reactor decontamination information exchange group; Washington, District of Columbia, USA (1 Sep 1965). The decontamination activity described includes: laboratory studies to evaluate reagents, and actual decontamination of 2 steam generators at New Production Reactor. ln laboratory tests, a proprietery oxalic acid solution appeared to be more effective th:dn sny other tried. No excessive corrosion was noted. Special reegents to dissolve high fired ceramic core materials (UO/sub 2/ and PuO/sub 2/) are being developed and evaluated. Phosphorous acid, sulfuric acid and a mixture of sulfuric and nitric acids were effective. Corrosion of 304 stainless steel was low. Two N Reactor steam generators were decontaminated to facilitate inspection and repair. The APSUL procedure was tried, but control of concentrations was inadequate and decontamination factors were low, ranging from 1.6 to 9.0. No excessive corrosion was noted. (auth)
Date: July 27, 1965
Creator: Ayres, J.A.; Larrick, A.P.; Perrigo, L.D. & Weed, R.D.
Partner: UNT Libraries Government Documents Department