稲田 崇 Takashi INADA Water Jet Peening (WJP) has been widely applied to Japanese nuclear power plants since 1999, as an approved mechanical mitigation technique against stress corrosion cracking (SCC) on materials use d for nuclear reactors.Existing laboratory experience and analysis indicated that WJP had no negative impact on pre-existing cracks, such as crack propagation during its application, although ther e was no field experience of applying WJP on cracked surfaces. Recently, The Japan Atomic Power C...
英字タイトル:
APPLICATION OF WATER JET PEENING ON BWR REACTORINTERNALS WITH CRACKED SURFACES

WJP (Water Jet Peening) technology generates the compressive residual stresses on the surface of the material by the extremely high impulse pressure caused by the collapse of cavitation bubbles when high-pressure water jet is discharged in the water. WJP is the promising technology for countermeasure of SCC initiated on the core structures of BWR with some advantages; Collection of foreign materials is not necessary, and WJP is applicable to the complicated structure in narrow space and improves relat...
英字タイトル:
Application of Water Jet Peening (WJP) technology to BWR Core Support Structures

Various works are planned for the decommissioning of Fukushima Daiichi nuclear power station (1F). The dose rate is high inside the reactor buildings, therefore it is necessary to reduce the dose rate. Decontamination is one of the ways to reduce the dose rate. The remote decontamination machine with high-pressure water was developed for the lower section, which is from the floor up to 2-meters on the wall in the reactor building. In this paper, the result of development and validation in 1F unit 1 rea...
英字タイトル:
Development of A Remote Decontamination Machine with High-Pressure Water for the lower section of the Reactor Building 大野 諭 Satoshi ONO Non-member