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Hydrogen in Structural Materials

#0724


Hydrogen in Structural Materials Conducting with High Temperature-High Pressure Steam

Tech Area / Field

  • PHY-SSP/Solid State Physics/Physics

Status
3 Approved without Funding

Registration date
27.08.1996

Leading Institute
VNIIEF, Russia, N. Novgorod reg., Sarov

Supporting institutes

  • A.N.Frumkin Institute of Physical Chemistry and Electrochemistry, Russia, Moscow\nSt Petersburg State University / Institute of Physics, Russia, St Petersburg

Collaborators

  • Idaho National Engineering and Environmental Laboratory, USA, ID, Idaho Falls\nForschungszentrum Karlsruhe Technik und Umwelt, Germany, Karlsruhe\nSandia National Laboratories, USA, NM, Albuquerque

Project summary

The aim of the present project is to investigate the effect of hydrogen produced in the course of metal corrosion on the strength characteristics of structural materials and the value of hydrogen leakage through various shells; to elaborate a methodological approach increasing the safety in operation of various reactors and pipelines.

Within the framework of the proposed project the following scientific problems will be solved:


- The main regularities of the permeation process of hydrogen produced in the course of steam and water corrosion of metals will be established. Dependencies of permeating flux on temperature, steam pressure, thickness of metal and corrosion resistance of metal will be investigated. The values of equivalent hydrogen pressure for various types of materials will be determined.
- Kinetics of corrosion processes of corresponding materials, structure and composition of the resulting oxide films will be studied. Correlation between the values of permeating hydrogen fluxes and properties of the resulting oxide films will be established.
- The strength properties of considered materials in steam and hydrogen environment would be studied. Correlation between strength properties of the studied materials and quantities of dissolved hydrogen will be established. Changes of the microstructure of materials subjected to the tests will be studied.
- Mathematical model of the studied phenomena and computer code for numerical calculations of hydrogen accumulation in structural materials in contact with water and steam of supercritical parameters and for calculations of hydrogen leakage into surrounding volumes of power reactors will be developed.
- Investigation will be provide on model metals and real structure materials for modern power plants.

As a final result of the proposed project the laboratory mock-up device for the measurements of hydrogen flux through the shells will be created. Calibrated system of gas sampling, unique unconventional magnetic sensor with a high sensitivity, automatic system of collection, processing and applying correction of data depending on the environmental conditions will be involved in this mock-up device. Conclusions necessary for development of industrial device will be presented as well.

The worked up mock-up device will be useful in maintenance of normal operating conditions on fission power and steam electric stations, future fusion devices. The same devices may be used in oil transporting and refining systems.

International co-operation

A potential role of foreign collaborators participating in the project activities may consist in joint research of structural materials of the similar foreign energetic plants and design hydrogen sensors. The collaborators from USA, Japan and Europe will be chosen during examination of the project.


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