David J Bell

Title: Innovations by David J Bell in Nuclear Reactor Technology

Introduction

David J Bell is an accomplished inventor based in San Jose, California. He has made significant contributions to the field of nuclear reactor technology, holding two patents that showcase his innovative approach to engineering challenges.

Latest Patents

David's latest patents include advancements in flow restricting slip joint clamps and methods for use in a nuclear reactor jet pump. These clamps can be secured to a slip joint and limit flow through the same by seating on a diffuser axially, regardless of wear and damage in the slip joint. An extension from the clamp seats to the inlet mixer can be adjusted from outside the clamp to achieve an individual preload or flow limitation through the slip joint. The extension may take the form of an O-ring or other shapes. A biasing drive connects to and moves the extension from an outside surface of the clamp, which may include a threaded cap in an outer groove linked to a plunger via a spring. The clamps are fabricated from materials that maintain their physical properties when exposed to the operating environment of a nuclear reactor, ensuring they are both rigid and resilient.

Another patent focuses on slip joint clamps that seat on a diffuser end via external features, such as guide ears, regardless of slip joint wear or damage. These clamps can be opened and closed to surround an inlet mixer, forming a slip joint with the diffuser without the need for disassembly. The clamps drive or bias the inlet mixer in a lateral direction, largely perpendicular to the axial orientation and end of the diffuser, to achieve a desired preload force in the inlet mixer and clamp connection. The clamp arms include rotatable halves that, when joined, form a complete fill between the inner surface of the diffuser and the outer surface of the inlet mixer. A lateral drive pushes the inlet mixer against the clamp and may include a resistive element. An accessible set of guide ear bolts and lateral driving bolts allows for exterior manipulation to axially mount or laterally bias the clamp in the slip joint.

Career Highlights

David J Bell is currently employed at GE-Hitachi Nuclear Energy Americas LLC, where he continues to innovate in the field of nuclear energy. His work has been instrumental in developing technologies that enhance the safety and efficiency of nuclear reactors.

Collaborations

David has collaborated with notable colleagues, including Hampton W Lane and Bret E Nelson, contributing to a dynamic team focused on advancing nuclear technology.