298 Matching Results

Search Results

Advanced search parameters have been applied.

RADIOACTIVITY IN SILT OF THE CLINCH AND TENNESSEE RIVERS

Description: Surveys of radioactivity in the Clinch and Tennessee rivers during 1954 through 1958 are summarized. It is concluded that no immediate hazard exists due to the reconcentration of radioactive materials in downstream bottom sediments, However, if the amount of radioactivity in the bottom sediment continues to increase for the next few years, it will be necessary to re-evaluate our present waste disposal policy in order to further restrict the release of ralioactive wastes to the Clinch River. The most probable effect of the radioactive sediment on industry would be an increased background counting rate if sand from the river bottom were used in making concrete for the construction of counting rooms of instrument laboratories. The problem ofthe radioactivity in solution in the river water would have to be considered before using the downstream water as process water in the manufacture of film emulsions or other photographic materials, (auth)
Date: December 1, 1959
Creator: Cottrell, W.D.
Partner: UNT Libraries Government Documents Department

STATUS REPORT NO. 3 ON CLINCH RIVER STUDY

Description: Results of chemical and radiochemical analyses of Clinch River water, animal life, and sediments are presented for the period May to October 1961. Surface-water hydrology included establishment and operation of gaging stations and stream-flow studies. (R.J.S.)
Date: December 1, 1962
Creator: Morton, R.J. ed.
Partner: UNT Libraries Government Documents Department

Anodonta imbecillis QA Test 4, Clinch River - Environmental restoration program (CR-ERP)

Description: Toxicity testing of split whole sediment samples using juvenile freshwater mussels (Anodonta imbecillis) was conducted by TVA to provide a quality assurance mechanism for test organism quality and overall performance of the test being conducted by CR-ERP personnel as part of the CR-ERP biomonitoring study of Clinch River sediments. Testing of sediment samples collected September 8 from Poplar Creek Miles 6.0 and 1.0 was conducted September 13-22, 1994. Results from this test showed no toxicity (survival effects) to fresh-water mussels during a 9-day exposure to the sediments.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department

Anodonta imbecillis QA Test 1, Clinch River - Environmental Restoration Program (CR-ERP)

Description: Toxicity testing of split whole sediment samples using juvenile freshwater mussels (Anodonta imbecillis) was conducted by TVA and CR-ERP personnel as part of the CR-ERP biomonitoring study of Clinch River sediments to provide a quality assurance mechanism for test organism quality and overall performance of the test. In addition, testing included procedures comparing daily renewal versus non-renewal of test sediments. Testing of sediment samples collected July 15 from Poplar Creek Miles 6.0 and 5.1 was conducted from July 21-30, 1993. Results from this test showed no toxicity (survival effects) to fresh-water mussels during a 9-day exposure to the sediments. Side by side testing of sediments with daily sediment renewal and no sediment renewal showed no differences between methods. This may be due to the absence of toxicity in both samples and may not reflect true differences between the two methods for toxic sediment.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department

Final Project Report on Arsenic Biogeochemistry in the Clinch River and Watts Bar Reservoir, Volume 1: Main Text

Description: This study was conducted as a special project of the Clinch River Remedial Investigation, which is tasked with conducting a remedial investigation of the Clinch River and Watts Bar Reservoir by the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Clinch River Environmental Restoration Program is funded by the U. S. Department of Energy to investigate the possible corrective actions required to rectify the historic releases of hazardous waste and radioactive contaminants into the Clinch River/Watts Bar Reservoir system. The arsenic study was undertaken after preliminary screening of existing data from the Clinch River and Watts Bar Reservoir. As a result of nonconservative screening, arsenic was assigned as a definitely high priority substance for further human health consideration, and the data showed that arsenic concentrations exceeded benchmark criteria for ecological risk assessment. This study investigated the speciation, distribution, and mobility of arsenic in the sediment, pore water, and the water column seasonally over a 3-year period (1990-1992).
Date: January 1, 1993
Creator: Ford, C.J.
Partner: UNT Libraries Government Documents Department

Anodonta imbecillis QA Test 3, Clinch River - Environmental Restoration Program (CR-ERP)

Description: Toxicity testing of split whole sediment samples using juvenile freshwater mussels (Anodonta imbecillis) was conducted by TVA to provide a quality assurance mechanism for test organism quality and overall performance of the test being conducted by CR-ERP personnel as part of the CR-ERP biomonitoring study of Clinch River sediments. Testing of sediment samples collected May 5 from Poplar Creek Miles 6.0 and 2.9 was conducted from May 10-19, 1994. Results from this test showed no toxicity (survival effects) to fresh-water mussels during a 9-day exposure to the sediments.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department

CFD modeling of the dispersion of contaminants in the Clinch River

Description: The purpose of this work is to develop a multi-dimensional, transient computational fluid dynamics (CFD) model for the entrance region of the confluence of White Oak Creek and the Clinch River that will produce accurate predictions for dispersion of contaminants within a segment of the river. The objective is to develop the capability to predict the multi-dimensional distribution of contaminant concentration in the Clinch River. The numerical model was defined using the commercial computational-fluid-dynamics (CFD) computer program CFX Version 4, developed by AEA Technology Engineering Software, Inc. the program solves the Navier-Stokes, energy and species-transport equations with the SIMPLEC finite-volume method. A scalar advection-diffusion equation was defined to represent transport of the contaminant within the flow field. CFX has a multiblock capability that allows an accurate representation of the true river geometry. The present study represents the first application of a general-purpose turbulence model to the Clinch River dispersion problem.
Date: August 1, 1997
Creator: Wendel, M.W.; Williams, P.T. & Platfoot, J.H.
Partner: UNT Libraries Government Documents Department

Anodonta imbecillis QA Test 2, Clinch River - Environmental Restoration Program (CR-ERP)

Description: Toxicity testing of split whole sediment samples using juvenile freshwater mussels (Atiodonta imbecillis) was conducted by TVA to provide a quality assurance mechanism for test organism quality and overall performance of the test being conducted by CR-ERP personnel as part of the CR-ERP biomonitoring study of Clinch River sediments. Testing of sediment samples collected August 14 from Poplar Creek Miles 6.0 and 4.3 was conducted from August 24-September 2, 1993. Results from this test showed no toxicity (survival effects) to fresh--water mussels during a 9-day exposure to the sediments.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department

Remedial investigation/feasibility study of the Clinch River/Poplar Creek operable unit. Volume 5

Description: This volume is in support of the findings of an investigation into contamination of the Clinch River and Poplar Creek near the Oak Ridge Reservation (for more than 50 years, various hazardous and radioactive substances have been released to the environment as a result of operations and waste management activities there). It addresses the quality assurance objectives for measuring the data, presents selected historical data, contains data from several discrete water characterization studies, provides data supporting the sediment characterization, and contains data related to several biota characterization studies.
Date: March 1, 1996
Partner: UNT Libraries Government Documents Department

Anodonta imbecillis copper sulfate reference toxicant test, Clinch River - Environmental Restoration Program (CR-ERP)

Description: Reference toxicant testing using juvenile freshwater mussels was conducted as part of the CR-ERP biomonitoring study of Clinch River sediments to assess the sensitivity of test organisms and the overall performance of the test. Tests were conducted using moderately hard synthetic water spiked with known concentrations of copper as copper sulfate. Toxicity testing of copper sulfate reference toxicant was conducted from May 12-21, 1993. The organisms used for testing were juvenile fresh-water mussels (Anodonta imbecillis). Results from this test showed an LC{sub 50} value of 1.12 mg Cu/L which is lower than the value of 2.02 mg Cu/L obtained in a previous test. Too few tests have been conducted with copper as the toxicant to determine a normal range of values.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department

Clinch River - Environmental Restoration Program (CR-ERP) pilot study, ambient water toxicity

Description: Clinch River - Environmental Restoration Program (CR-ERP) personnel and Tennessee Valley Authority (TVA) personnel conducted a pilot study during the week of April 22-29, 1993, prior to initiation of CR-ERP Phase II Sampling and Analysis activities as described in the Statement of Work (SOW) document. The organisms specified for testing were larval fathead minnows, Pimephales promelas, and the daphnid, Ceriodaphnia dubia. Surface water samples were collected by TVA Field Engineering personnel from Clinch River Mile 9.0 and Poplar Creek Kilometer 1.6 on April 21, 23, and 26. Samples were split and provided to the CR-ERP and TVA toxicology laboratories for testing. Exposure of test organisms to these samples resulted in no toxicity (survival, growth, or reproduction) to either species in testing conducted by TVA.
Date: June 1, 1997
Creator: Simbeck, D.J.
Partner: UNT Libraries Government Documents Department