Nobumi Ohyama

Title: Nobumi Ohyama: Innovator in Sodium Leakage Detection and Liquid Metal Monitoring

Introduction

Nobumi Ohyama is a notable inventor based in Oarai-machi, Japan. He has made significant contributions to the field of engineering, particularly in the development of technologies for detecting sodium leakage and monitoring liquid metal flow conditions. With a total of 3 patents to his name, Ohyama's work reflects a commitment to innovation and safety in industrial applications.

Latest Patents

One of Ohyama's latest patents is a **Multiple-sheathed sodium leakage detection apparatus**. This device is designed to detect small amounts of sodium leakage due to breakage in temperature measurement wells at an early stage. The apparatus combines a multiple-sheathed sodium leakage detector, which includes a sheathed thermocouple and sodium leakage detection element wires, all housed within an insulating material. It also features a sodium leakage judgment device that assesses leakage based on signals from the detector, an alarm device that alerts users to any detected leakage, and signal lines connecting these components. The design allows for easy insertion into existing wells without requiring modifications.

Another significant patent is the **Method for monitoring flow condition of liquid metal**. This method utilizes a detector with an excitation coil powered by an alternating current and at least two detection coils positioned on either side of the excitation coil. By analyzing the peak point of the cross-correlation function of fluctuation signals from the detection coils, the method can determine various flow conditions of liquid metal, including changes in flow velocity, void fraction, and the presence of voids.

Career Highlights

Throughout his career, Nobumi Ohyama has worked with reputable companies such as Doryokuro Kakunenryo Kaihatsu Jigyodan and Yokogawa Electric Works, Ltd. His experience in these organizations has contributed to his expertise in developing innovative solutions for industrial challenges.

Collaborations

Ohyama has collaborated with several professionals in his field, including Koichiro Nakamoto and Kiyoshi Adachi. These partnerships have likely enhanced his research and development efforts, leading to the successful creation of his patented technologies.

Conclusion

Nobumi Ohyama's contributions to sodium leakage detection and liquid metal monitoring exemplify the importance of innovation in engineering. His patents not only demonstrate his technical expertise but also highlight his commitment to improving