Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The automated spectrophotometer described is the first in a planned series of automated instruments for determining plutonium and uranium in nuclear fuel cycle materials. It has a throughput rate of 5 min per sample and uses a highly specific method of analysis for these elements. The range of plutonium and uranium measured is 0.5 to 14 mg and 1 to 14 mg, respectively, in 0.5 ml or less of solution with an option to pre-evaporate larger volumes. The precision of the measurements is about 0.02 mg standard deviation over the range corresponding to about 2 rel percent at the 1-mg level and 0.2 rel percent at the 10-mg level. The method of analysis involves the extraction of tetrapropylammonium plutonyl and uranyl trinitrate complexes into 2-nitropropane and the measurement of the optical absorbances in the organic phase at unique peak wavelengths. Various aspects of the chemistry associated with the method are presented. The automated spectrophotometer features a turntable that rotates as many as 24 samples in tubes to a series of stations for the sequential chemical operations of reagent addition and phase mixing to effect extraction, and then to a station for the absorbance measurement. With this system, the complications of sample transfers and flow-through cells are avoided. The absorbance measurement system features highly stable interference filters and a microcomputer that controls the timing sequence and operation of the system components. Output is a paper tape printout of three numbers: a four-digit number proportional to the quantity of plutonium or uranium, a two-digit number that designates the position of the tube in the turntable, and a one-digit number that designates whether plutonium or uranium was determined. Details of the mechanical and electrical components of the instrument and of the hardware and software aspects of the computerized control system are provided.
Automated Spectrophotometer for Plutonium and Uranium Determination
Author: D. D. Jackson
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
Book Description
Automated Spectrophotometer for Plutonium and Uranium Determination
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The automated spectrophotometer described is the first in a planned series of automated instruments for determining plutonium and uranium in nuclear fuel cycle materials. It has a throughput rate of 5 min per sample and uses a highly specific method of analysis for these elements. The range of plutonium and uranium measured is 0.5 to 14 mg and 1 to 14 mg, respectively, in 0.5 ml or less of solution with an option to pre-evaporate larger volumes. The precision of the measurements is about 0.02 mg standard deviation over the range corresponding to about 2 rel percent at the 1-mg level and 0.2 rel percent at the 10-mg level. The method of analysis involves the extraction of tetrapropylammonium plutonyl and uranyl trinitrate complexes into 2-nitropropane and the measurement of the optical absorbances in the organic phase at unique peak wavelengths. Various aspects of the chemistry associated with the method are presented. The automated spectrophotometer features a turntable that rotates as many as 24 samples in tubes to a series of stations for the sequential chemical operations of reagent addition and phase mixing to effect extraction, and then to a station for the absorbance measurement. With this system, the complications of sample transfers and flow-through cells are avoided. The absorbance measurement system features highly stable interference filters and a microcomputer that controls the timing sequence and operation of the system components. Output is a paper tape printout of three numbers: a four-digit number proportional to the quantity of plutonium or uranium, a two-digit number that designates the position of the tube in the turntable, and a one-digit number that designates whether plutonium or uranium was determined. Details of the mechanical and electrical components of the instrument and of the hardware and software aspects of the computerized control system are provided.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The automated spectrophotometer described is the first in a planned series of automated instruments for determining plutonium and uranium in nuclear fuel cycle materials. It has a throughput rate of 5 min per sample and uses a highly specific method of analysis for these elements. The range of plutonium and uranium measured is 0.5 to 14 mg and 1 to 14 mg, respectively, in 0.5 ml or less of solution with an option to pre-evaporate larger volumes. The precision of the measurements is about 0.02 mg standard deviation over the range corresponding to about 2 rel percent at the 1-mg level and 0.2 rel percent at the 10-mg level. The method of analysis involves the extraction of tetrapropylammonium plutonyl and uranyl trinitrate complexes into 2-nitropropane and the measurement of the optical absorbances in the organic phase at unique peak wavelengths. Various aspects of the chemistry associated with the method are presented. The automated spectrophotometer features a turntable that rotates as many as 24 samples in tubes to a series of stations for the sequential chemical operations of reagent addition and phase mixing to effect extraction, and then to a station for the absorbance measurement. With this system, the complications of sample transfers and flow-through cells are avoided. The absorbance measurement system features highly stable interference filters and a microcomputer that controls the timing sequence and operation of the system components. Output is a paper tape printout of three numbers: a four-digit number proportional to the quantity of plutonium or uranium, a two-digit number that designates the position of the tube in the turntable, and a one-digit number that designates whether plutonium or uranium was determined. Details of the mechanical and electrical components of the instrument and of the hardware and software aspects of the computerized control system are provided.
Evaluation of the LASL Automated Spectrophotometer for Uranium Determination at Submilligram Levels
Author: R. M. Hollen
Publisher:
ISBN:
Category : Actinide elements
Languages : en
Pages : 8
Book Description
The LASL automated spectrophotometer, designed for determination of 1 to 14 mg of uranium and 0.5 to 14 mg of plutonium, has been evaluated for determination of lower levels of uranium to 0.12 mg. The essentially linear response of absorbance is maintained and the standard deviation for a single measurement is constant at about 0.013 mg of uranium, corresponding to a maximum uncertainty of about 10 percent at the 0.12-mg limit. The instrument was applied to the analysis of a series of low-level-concentration, 0.07- to 0.8-mg/ml uranium samples. The results were not statistically different from those obtained by a manual spectrophotometric method.
Publisher:
ISBN:
Category : Actinide elements
Languages : en
Pages : 8
Book Description
The LASL automated spectrophotometer, designed for determination of 1 to 14 mg of uranium and 0.5 to 14 mg of plutonium, has been evaluated for determination of lower levels of uranium to 0.12 mg. The essentially linear response of absorbance is maintained and the standard deviation for a single measurement is constant at about 0.013 mg of uranium, corresponding to a maximum uncertainty of about 10 percent at the 0.12-mg limit. The instrument was applied to the analysis of a series of low-level-concentration, 0.07- to 0.8-mg/ml uranium samples. The results were not statistically different from those obtained by a manual spectrophotometric method.
Determination of Submilligram Amounts of Uranium with the LASL Automated Spectrophotometer
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The LASL automated spectrophotometer for the determination of both uranium and plutonium is described. Data are given showing its extension to the determination of submilligram amounts of uranium. A microgram-sensitive method for uranium has been developed and its adaptation to the instrument is underway.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The LASL automated spectrophotometer for the determination of both uranium and plutonium is described. Data are given showing its extension to the determination of submilligram amounts of uranium. A microgram-sensitive method for uranium has been developed and its adaptation to the instrument is underway.
Measurement Technology for Safeguards and Materials Control
Author: Thomas R. Canada
Publisher:
ISBN:
Category : Material accountability
Languages : en
Pages : 776
Book Description
Publisher:
ISBN:
Category : Material accountability
Languages : en
Pages : 776
Book Description
Measurement technology for safeguards and materials control
Author: American Nuclear Society
Publisher:
ISBN:
Category : Material accountability
Languages : en
Pages : 776
Book Description
Publisher:
ISBN:
Category : Material accountability
Languages : en
Pages : 776
Book Description
NBS Special Publication
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 876
Book Description
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 876
Book Description
An Automatic-inline Spectrophotometer for the Determination of Uranium in the Presence of Aluminum Nitrate, Nitric Acid and Highly Radioactive Fission Products
Author: Robert Birney Kimball
Publisher:
ISBN:
Category : Spectrophotometer
Languages : en
Pages : 62
Book Description
Publisher:
ISBN:
Category : Spectrophotometer
Languages : en
Pages : 62
Book Description
ERDA Energy Research Abstracts
Author: United States. Energy Research and Development Administration
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 994
Book Description
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 994
Book Description
Publications of the National Bureau of Standards ... Catalog
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 704
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 704
Book Description