John Bruce Mcdaniel

US Patent:

4224983, Sep 30, 1980

Filed:

Feb 2, 1978

Appl. No.:

5/874382

Inventors:

Glenn C. Thurston - Solana Beach CA
John D. McDaniel - Solana Beach CA
Paul R. Gertsch - San Diego CA

Assignee:

General Atomic Company - San Diego CA

International Classification:

F28F 902
F28F 1300

US Classification:

165158

Abstract:

A heat exchange apparatus for transferring heat from a reactor gas coolant to a secondary fluid medium. The heat exchange apparatus comprises an elongated vertically extending hole in a concrete shield. Supported within the hole in spaced relation to the wall thereof is an elongated vertical extending tubular shroud which shroud has a gas entry at its lower end and a gas exit at its upper end. Means are provided for dividing the annular space between the shroud 16 and the wall of the hole into an upper and a lower region. Disposed in the shield is an inlet for reactor coolant which communicates with the lower region and is positioned vertically so as to be spaced above the gas entry to the shroud to thereby suppress natural convection during non-operating standby conditions of the apparatus. An outlet for reactor coolant, which is disposed in the shield, communicates with the upper region. A plurality of vertically extending, spaced apart bayonet tube assemblies are supported within the shroud and means are provided for passing secondary fluid through these tube assemblies.

US Patent:

5274682, Dec 28, 1993

Filed:

Jan 19, 1993

Appl. No.:

8/006034

Inventors:

John D. McDaniel - Solana Beach CA

Assignee:

Nuclear Assurance Corporation, Inc. - Norcross GA

International Classification:

G21C 1932

US Classification:

376261

Abstract:

A storage canister for spent nuclear fuel rods, having loading and storage configurations, has an open end and an apertured end wall, and means therein defining a plurality of rod locations. The canister also has movable means therein for vertically offsetting adjacent rods within the canister so that any pair of adjacent rods are vertically offset from each other. The movable means is positioned during loading to permit fluid flow into and out of the canister through the apertured end wall and in the storage configuration blocks at least one of the apertures in the end wall. The movable means may also be used to lift the fuel rods such that their tops extend above the canister body to permit removal of one or more rods. A closure member for the open end has a locking mechanism for locking it to the canister and a tamper indicating mechanism.

US Patent:

52364160, Aug 17, 1993

Filed:

May 23, 1991

Appl. No.:

7/704356

Inventors:

John D. McDaniel - El Cajon CA
James E. Gharib - San Diego CA

Assignee:

IVAC Corporation - San Diego CA

International Classification:

A61M 3100

US Classification:

604 67

Abstract:

A syringe plunger position detection and alarm system continuously determines the position of a syringe plunger and provides near end of travel and end of travel alarms. Plunger movement is also monitored and if movement is less than a calculated amount, an alarm is provided. A variety of syringes of different sizes is usable. A potentiometer is mounted along the line of travel of the screw drive mechanism and a marker is mounted to extend from the screw mechanism to the potentiometer to force an internal contact in the potentiometer. The voltage provided by this internal contact is analyzed by the process to derive absolute and relative position of the plunger. The end of travel position of each plunger is stored in processor memory and from the operator input rate of infusion, the characteristic curve of the potentiometer also stored in memory, the plunger displacement of the syringe, and the time of the near end of travel alarm, the voltage of the near end of travel position is calculated. The potentiometer is self-contained and sealed.