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9,963 Matching Results

Start Over Year 1996 Day 1st

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(open access)

WVNS Tank Farm Process Support: Corrosion evaluation of Waste Storage Tank 8D-2 under simulated sludge washing conditions

Radioactive waste solutions resulting from spent fuel reprocessing operations at West Valley Nuclear Services (WVNS), West Valley, New York, have been stored in two carbon steel underground storage tanks for several years. Constructed in 1964, these tanks are designated as Tanks 8D-1 and 8D-2. Tank 8D-1 has contained about 64,000 kg of cesium-loaded zeolite and about 380 kL of a relatively dilute solution of sodium nitrite and sodium hydroxide; Tank 8D-2 has contained about 2120 kL of waste slurry resulting from spent fuel reprocessing operations. Over the next few years, plans for permanent disposal of the tank contents will be implemented. Until the waste is removed, the integrity of the tanks must be maintained. A corrosion support program is being conducted at Pacific Northwest National Laboratory (PNNL) to investigate internal and external corrosion of the tanks and to make recommendations accordingly. Tank 8D-1 was selected as the focus for an evaluation of external corrosion, and results of that investigation are provided in Mackey and Westerman. Tank 8D-2 was investigated for internal corrosion. The results of the corrosion study for Tank 8D-2 are given in this report.

Date: January 1, 1996

Creator: Elmore, M.R.

Object Type: Report

System: The UNT Digital Library

(open access)

X-ray absorption spectroscopic studies of mononuclear non-heme iron enzymes

Fe-K-edge X-ray absorption spectroscopy (XAS) has been used to investigate the electronic and geometric structure of the iron active site in non-heme iron enzymes. A new theoretical extended X-ray absorption fine structure (EXAFS) analysis approach, called GNXAS, has been tested on data for iron model complexes to evaluate the utility and reliability of this new technique, especially with respect to the effects of multiple-scattering. In addition, a detailed analysis of the 1s{yields}3d pre-edge feature has been developed as a tool for investigating the oxidation state, spin state, and geometry of iron sites. Edge and EXAFS analyses have then been applied to the study of non-heme iron enzyme active sites.

Date: January 1, 1996

Creator: Westre, T.E.

Object Type: Thesis or Dissertation

System: The UNT Digital Library

(open access)

Yucca Mountain Site Characterization Project bibliography, January--June 1995. Supplement 4, Add.3: An update

Following a reorganization of the Office of Civilian Radioactive Waste Management in 1990, the Yucca Mountain Project was renamed Yucca Mountain Site Characterization Project. The title of this bibliography was also changed to Yucca Mountain Site Characterization Project Bibliography. Prior to August 5, 1988, this project was called the Nevada Nuclear Waste Storage Investigations. This bibliography contains information on this ongoing project that was added to the Department of Energy`s Energy Science and Technology Database from January 1, 1995, through June 30, 1995. The bibliography is categorized by principal project participating organization. Participant-sponsored subcontractor reports, papers, and articles are included in the sponsoring organization`s list. Another section contains information about publications on the Energy Science and Technology Database that were not sponsored by the project but have some relevance to it.

Date: January 1, 1996

Creator: Stephan, P.M.

Object Type: Report

System: The UNT Digital Library