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Sumitomo Metals Receives ISOE Technical Award for Steel Tube Film Coating
04/12/2010 - The Information System on Occupational Exposure (ISOE) Committee awards Sumitomo Metals for its contribution in realizing the world's lowest radiation-level nuclear plant, by supplying its feed-water heater tubes that use the awarded film coating technology
Sumitomo Metal Industries, Ltd. has received the Technical Award from the Information System on Occupational Exposure (ISOE) Committee that is led by the joint secretariat of the OECD/NEA (Nuclear Energy Agency) and IAEA (International Atomic Energy Agency) at the ISOE Asia Symposium. The Committee awards technologies that help reduce radiation exposure of workers at nuclear plants.
Sumitomo Metals was awarded for its contribution in realizing the world's lowest radiation-level nuclear plant, by supplying its feed-water heater tubes that use the awarded film coating technology.
Stainless and other steel tubes used in the nuclear power plants tend to release a minute amount of metal ion such as cobalt and chromium in the cooling water of a reactor, the company explained. The ion tends to increase the amount of exposure, which has caused radiation exposure at the time of maintenance work of the generation plant.
Sumitomo Metals has succeeded in manufacturing material that reduces the content of cobalt to a minute amount and developing a film processing technology, by which the oxidized film formed on the inner surface of tubes helps to reduce release of metal ion including cobalt and chromium from tubes.
This film processing technology was adopted at the boiling water reactor (BWR) type of nuclear power plant. Sumitomo Metals aims at applying the new film technology for steam generator tubes in the pressurized water reactor (PWR) type of nuclear power plant in the future.
