None

Tsunoda, Naomi; Asakura, Yoshiro*

PNC TN8450 89-002, 170 Pages, 1989/03

PNC-TN8450-89-002.pdf:6.62MB

None

In-plant Measurements of Gamma-ray Transmissions for Precise K-edge and Passive Assay of Plutonium Concentration and Isotopic Fractions in Product Solutions

Russo, P. A.*; Asakura, Yoshiro*; Hsue, S. T.*; Kondo, Isao*; Sprinkle, J. K. Jr.*; Masui, J.*; Johnson, S. S.*; Shoji, J.*

PNC TN841 82-10, 76 Pages, 1982/08

PNC-TN841-82-10.pdf:4.87MB

An instrument based upon high-resolution -ray measurements has beentested for more than 1 year at the TokaiReprocessing Facility for determinationof plutonium concentration by K-edge absorption densitometry and for determination of plutonium isotopic fractions bytransmission-corrected passive -ray spectrometry. The nondestructive assay instrument was designed and built atLos Alamos National Laboratory for theTokai Advanced Safeguards Technology Exercise (TASTEX). It was used at Tokai forthe timely assay of more than 100 productsolution samples daring the TASTEX evaluations The results were compared tosolution samples during the TASTEXaluations. The results were compared toreference values obtained by conventionaldestructive analysis of these samples. The precision and accuracy of plutoniumconcentrations measured by the K-edgetechnique are shown to be with in 0.6% (1) in these applications. The precisionsand accuracies of the isotopic fractions. determined by these passive

None

Asakura, Yoshiro*; Miyahara, Kenji; *; Masui, J.*; Kondo, Isao*; *; *; Kamata, Masayuki

PNC TN852 81-18, 266 Pages, 1981/05

PNC-TN852-81-18.pdf:6.24MB

None

None

Miyahara, Kenji; Asakura, Yoshiro*; *; Masui, J.*; Kondo, Isao*; *; Kamata, Masayuki; *

PNC TN852 81-15, 46 Pages, 1981/04

PNC-TN852-81-15.pdf:2.23MB

None

None

*; *; *; *; *; Asakura, Yoshiro*

PNC TN841 74-52, 25 Pages, 1974/12

PNC-TN841-74-52.pdf:0.85MB

no abstracts in English

None

; Miyo, Hiroaki; ; Asakura, Yoshiro

International Incineration Conference, , 

Evaluation of the electron distribution function for detached plasma in JT-60U

Uehara, Kazuya; Asakura, Nobuyuki; Sadamoto, Yoshiro*; Kawashima, Hisato; Kubo, Hirotaka; Nakano, Tomohide; Takenaga, Hidenobu; Fujimoto, Kayoko; Amemiya, Hiroshi*; Saito, Yoshifumi*

no journal, , 

The temperature and energy of electrons are important issues when energy and particle fluxes to the divertor are evaluated. To do this, we have analyzed the electron energy distribution function by differentiating the probe current with respect to the probe voltage numerically, where probe current has been measured in the divertor plasma of JT-60U. We have evaluated the electron temperature and the shape of the distribution function when the X point MARFE and the plasma detachment are formed.