Christopher P Oertel

US Patent:

7923692, Apr 12, 2011

Filed:

Oct 3, 2008

Appl. No.:

12/244876

Inventors:

Troy J. Tranter - Idaho Falls ID, US
Christopher P. Oertel - Idaho Falls ID, US
John R. Giles - Pocatello ID, US
Nicholas R. Mann - Rigby ID, US
Michael E. McIlwain - Idaho Falls ID, US

Assignee:

Battelle Energy Alliance, LLC - Idaho Falls ID

International Classification:

G01T 1/17

US Classification:

250364, 25036301

Abstract:

A device for collection of radionuclides includes a mixture of a polymer, a fluorescent organic scintillator and a chemical extractant. A radionuclide detector system includes a collection device comprising a mixture of a polymer, a fluorescent agent and a selective ligand. The system includes at least one photomultiplier tube (PMT). A method of detecting radionuclides includes providing a collector device comprising a mixture comprising a polymer, a fluorescent organic scintillator and a chemical extractant. An aqueous environment is exposed to the device and radionuclides are collected from the environment. Radionuclides can be concentrated within the device.

US Patent:

50678205, Nov 26, 1991

Filed:

Jun 19, 1990

Appl. No.:

7/540240

Inventors:

Thomas P. Donohoue - Denver CO
Christopher P. Oertel - Arvada CO
William H. Tyree - Boulder CO
Joe L. Valdez - Denver CO

Assignee:

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

International Classification:

G01K 1708

US Classification:

374 31

Abstract:

A circuit for measuring temperature differentials in a calorimeter is disclosed. The temperature differential between the reference element and sample element containing a radioactive material is measured via a wheatstone bridge arrangement of thermistors. The bridge is driven with an alternating current on a pulsed basis to maintain the thermal floor of the calorimeter at a low reference value. A lock-in amplifier connected to the bridge phase locks a signal from the bridge to the input pulsed AC signal to provide a DC voltage. The DC voltage is sampled over time and provided to a digital computer. The digital computer, using curve fitting algorithms, will derive a function for the sample data. From the function, an equilibrium value for the temperature may be calculated.

US Patent:

20160047785, Feb 18, 2016

Filed:

Aug 13, 2015

Appl. No.:

14/826056

Inventors:

- Idaho Falls ID, US
MATTHEW G. WATROUS - IDAHO FALLS ID, US
CHRISTOPHER P. OERTEL - IDAHO FALLS ID, US
CHRISTOPHER A. McGRATH - BLACKFOOT ID, US

International Classification:

G01N 33/00
G01T 1/167

Abstract:

Containers for a fluid sample containing a radionuclide for measurement of radiation from the radionuclide include an outer shell having one or more ports between and interior and an exterior of the outer shell, and an inner shell secured to the outer shell. The inner shell includes a detector receptacle sized for at least partial insertion into the outer shell. The inner shell and outer shell together at least partially define a fluid sample space. The outer shell and inner shell are configured for maintaining an operating pressure within the fluid sample space of at least about 1000 psi. Systems for measuring radioactivity in a fluid include such a container and a radiation detector received at least partially within the detector receptacle. Methods of measuring radioactivity in a fluid sample include maintaining a pressure of a fluid sample within a Marinelli-type container at least at about 1000 psi.