Gordon D Jarvinen

7521007, Apr 21, 2009

Oct 4, 2004

10/956506

Gordon D. Jarvinen - Los Alamos NM,
David W. Carroll - Los Alamos NM,
David J. Devlin - Santa Fe NM,

The United States of America as represented by the United States Department of Energy - Washington DC

G21C 3/02
G21C 3/58

252636, 252639, 376411, 376412, 264 05

Microstructured nuclear fuel adapted for nuclear power system use includes fissile material structures of micrometer-scale dimension dispersed in a matrix material. In one method of production, fissile material particles are processed in a chemical vapor deposition (CVD) fluidized-bed reactor including a gas inlet for providing controlled gas flow into a particle coating chamber, a lower bed hot zone region to contain powder, and an upper bed region to enable powder expansion. At least one pneumatic or electric vibrator is operationally coupled to the particle coating chamber for causing vibration of the particle coater to promote uniform powder coating within the particle coater during fuel processing. An exhaust associated with the particle coating chamber and can provide a port for placement and removal of particles and powder. During use of the fuel in a nuclear power reactor, fission products escape from the fissile material structures and come to rest in the matrix material.

20100301288, Dec 2, 2010

Jun 1, 2009

12/476015

JONATHAN PHILLIPS - Rio Rancho NM,
STEVAN G. PATTILLO - Jemez Springs NM,
JAMES A. VALDEZ - Dixon NM,
GORDON D. JARVINEN - Los Alamos NM,

Los Alamos National Security, LLC - Los Alamos NM

C09K 11/04

252638

A composition is prepared by heating particles of a nuclear fuel material in a metal salt that decomposes below 1000° C. to form a metal oxide. Magnesium nitrate hexahydrate is an example of such a metal salt. A resulting composition includes the particles homogeneously dispersed in a matrix of magnesium oxide. After the composition is used in a nuclear reactor, the now spent composition is removed, cooled, and the matrix is dissolved away from the spent particles, which can be reused in another nuclear fuel composition. The recovered fuel particles also contain some fission products that provide a radiation barrier that discourages theft of the recovered fuel particles.

54096782, Apr 25, 1995

Mar 11, 1993

8/031053

Barbara F. Smith - Los Alamos NM
Gordon D. Jarvinen - Los Alamos NM
Dale D. Ensor - Cookeville TN

The United States of America as represented by the Department of Energy - Washington DC

C01G 100
C01F 100

423 9

An organic extracting solution comprised of a bis(acylpyrazolone or a substituted bis(acylpyrazolone) and an extraction method useful for separating certain elements of the actinide series of the periodic table having a valence of four from one other, and also from one or more of the substances in a group consisting of hexavalent actinides, trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals and also from one or more of the substances in a group consisting of hexavalent actinides, trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals and also useful for separating hexavalent actinides from one or more of the substances in a group consisting of trivalent actinides, trivalent lanthanides, trivalent iron, trivalent aluminum, divalent metals, and monovalent metals.

49236300, May 8, 1990

Apr 3, 1989

7/331775

Barbara F. Smith - Los Alamos NM
Gordon D. Jarvinen - Los Alamos NM
Robert R. Ryan - Los Alamos NM

The United States of America as represented by the United States
Department of Energy - Washington DC

C09K 300

252184

An organic extracting solution useful for separating elements of the actinide series of the periodic table from elements of the lanthanide series, where both are in trivalent form. The extracting solution consists of a primary ligand and a secondary ligand, preferably in an organic solvent. The primary ligand is a substituted monothio-1,3-dicarbonyl, which includes a substituted 4-acyl-2-pyrazolin-5-thione, such as 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT). The secondary ligand is a substituted phosphine oxide, such as trioctylphosphine oxide (TOPO).

48679518, Sep 19, 1989

Mar 31, 1988

7/176131

Barbara F. Smith - Los Alamos NM
Gordon D. Jarvinen - Los Alamos NM
Robert R. Ryan - Los Alamos NM

The United States of America as represented by the United States
Department of Energy - Washington DC

C01F 1700
C07F 500
C01G 5600
B01D 1100

423 9

An organic extracting solution and an extraction method useful for separating elements of the actinide series of the periodic table from elements of the lanthanide series, where both are in trivalent form. The extracting solution consists of a primary ligand and a secondary ligand, preferably in an organic solvent. The primary ligand is a substituted monothio-1,3-dicarbonyl, which includes a substituted 4-acyl-2-pyrazolin-5-thione, such as 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione (BMPPT). The secondary ligand is a substituted phosphine oxide, such as trioctylphosphine oxide (TOPO).

57026831, Dec 30, 1997

Jan 22, 1991

7/643092

Paul H. Smith - Los Alamos NM
James R. Brainard - Los Alamos NM
Gordon D. Jarvinen - Los Alamos NM
Robert R. Ryan - Los Alamos NM

The United States of America as represented by the United States
Department of Energy - Washington DC

A61B 5055
C07F 500
G01N 2400

424 9361

A family of contrast agents for use in magnetic resonance imaging and a method of enhancing the contrast of magnetic resonance images of an object by incorporating a contrast agent of this invention into the object prior to forming the images or during formation of the images. A contrast agent of this invention is a paramagnetic lanthanide hexaazamacrocyclic molecule, where a basic example has the formula LnC. sub. 16 H. sub. 14 N. sub. 6. Important applications of the invention are in medical diagnosis, treatment, and research, where images of portions of a human body are formed by means of magnetic resonance techniques.

56705506, Sep 23, 1997

Jun 7, 1995

8/476964

Gordon D. Jarvinen - Los Alamos NM
S. Fredric Marsh - Los Alamos NM
Richard A. Bartsch - Lubbock TX

The Regents of the University of California Office of Technology Transfer - Alameda CA

C08F 832
C08F 840
B01J 4106

521 32

Anion exchange resins including at least two positively charged sites and a ell-defined spacing between the positive sites are provided together with a process of removing anions or anionic metal complexes from aqueous solutions by use of such resins. The resins can be substituted poly(vinylpyridine) and substituted polystyrene.