Gregory R Piefer

20110096887, Apr 28, 2011

May 1, 2009

12/990758

Gregory Piefer - Middleton WI, US

G21G 1/10

376193

A hybrid nuclear reactor that is operable to produce a medical isotope includes an ion source operable to produce an ion beam from a gas, a target chamber including a target that interacts with the ion beam to produce neutrons, and an activation cell positioned proximate the target chamber and including a parent material that interacts with the neutrons to produce the medical isotope via a fission reaction. An attenuator is positioned proximate the activation cell and selected to maintain the fission reaction at a subcritical level, a reflector is positioned proximate the target chamber and selected to reflect neutrons toward the activation cell, and a moderator substantially surrounds the activation cell, the attenuator, and the reflector.

20120286164, Nov 15, 2012

Dec 14, 2010

13/515487

Gregory Piefer - Middleton WI, US

Phoenix Nuclear Labs LLC - Middleton WI

G01N 23/05

2503581, 250391

An apparatus for inspecting the contents of a cargo container includes a neutron source having an ion source configured to provide deuterium or tritium ions and an accelerator configured to accelerate the ions toward a target having at least one of deuterium or tritium. The apparatus further includes a radiation detector where the neutron source is configured to deliver a neutron flux into the container and the radiation detector is configured to detect radiation exiting the container subsequent to the delivery of the neutron flux into the container.

20120300890, Nov 29, 2012

Jan 28, 2011

13/575826

Gregory Piefer - Middleton WI, US
Thomas Rockwell Mackie - Verona WI, US

SHINE MEDICAL TECHNOLOGIES, INC. - Monona WI

G21G 1/08

376158

A reactor that is operable to produce an isotope includes a region for containing a controlled nuclear fission reaction, the region segmented into a plurality of independent compartments, each of the compartments for containing a parent material in an aqueous solution that interacts with neutrons to produce the isotope via a fission reaction. Also provided are methods of producing an isotope using the same.

20120300891, Nov 29, 2012

Apr 30, 2012

13/460033

Gregory Piefer - Middleton WI, US

SHINE MEDICAL TECHNOLOGIES, INC. - Middleton WI

G21G 1/02
C01G 39/00

376189, 423 2

Provided are methods to separate an isotope from a first solution including uranium. The methods may include (a) cleaning the first solution to form a second solution including the uranium and a third solution including the isotope; (b) oxidizing the third solution to form an oxidized isotope; and (c) separating the oxidized isotope.

20130142296, Jun 6, 2013

Dec 5, 2011

13/373899

Gregory Richard Piefer - Middleton WI, US
Thad Alexander Heltemes - Waunakee WI, US
Eric Nicholas Van Abel - Oregon WI, US
Ross Francis Radel - Madison WI, US

G21G 1/10
G21C 3/04
G21B 1/00

376190, 376298, 376409

An apparatus for generating medical isotopes provides an annular fissile solution vessel surrounding a neutron generator. The annular fissile solution vessel provides for good capture of the emitted neutrons and a geometry that provides enhanced stability in an aqueous reactor. A neutron multiplier and/or a neutron moderator may be used to improve the efficiency and control the criticality of the reaction in the annular fissile solution vessel.

20100284502, Nov 11, 2010

Dec 29, 2008

12/810958

Gregory Piefer - Middleton WI, US

G21G 1/10

376190

The invention provides a compact high energy proton source useful for medical isotope production and for other applications including transmutation of nuclear waste. The invention further provides a device that can be used to generate high fluxes of isotropic neutrons by changing fuel types. The invention further provides an apparatus for the generation of isotopes including but not limited to F, C, O, Zn, I, Xe, In, I, I, Mo, and N.

20220270774, Aug 25, 2022

Apr 15, 2022

17/722164

- Janesville WI, US
Gregory Piefer - Janesville WI, US

G21G 1/08
G21B 1/01
G21C 1/30

A hybrid nuclear reactor that is operable to produce a medical isotope includes an ion source operable to produce an ion beam from a gas, a target chamber including a target that interacts with the ion beam to produce neutrons, and an activation cell positioned proximate the target chamber and including a parent material that interacts with the neutrons to produce the medical isotope via a fission reaction. An attenuator is positioned proximate the activation cell and selected to maintain the fission reaction at a subcritical level, a reflector is positioned proximate the target chamber and selected to reflect neutrons toward the activation cell, and a moderator substantially surrounds the activation cell, the attenuator, and the reflector.

20220270775, Aug 25, 2022

Apr 15, 2022

17/722176

- Janesville WI, US
Gregory Piefer - Janesville WI, US

G21G 1/08
G21B 1/01
G21C 1/30

A hybrid nuclear reactor that is operable to produce a medical isotope includes an ion source operable to produce an ion beam from a gas, a target chamber including a target that interacts with the ion beam to produce neutrons, and an activation cell positioned proximate the target chamber and including a parent material that interacts with the neutrons to produce the medical isotope via a fission reaction. An attenuator is positioned proximate the activation cell and selected to maintain the fission reaction at a subcritical level, a reflector is positioned proximate the target chamber and selected to reflect neutrons toward the activation cell, and a moderator substantially surrounds the activation cell, the attenuator, and the reflector.