Muon radiography is one of the remote sensing technologies, and it has been used at Fukushima Daiichi NPP to understand the status of the fuel inside the reactor. Nuclear Emulsion is one of the detectors used for muon radiography. Its features are light weight, compact size, no power supply required, high position resolution, and suitable for installation in a limited space. So far, at the Hamaoka NPP, from the floor on the second underground level and the sub-drain in the building-outdoor part, observation...
英字タイトル:
Measurement of lower part of PCV of Hamaoka NPP with nuclear emulsion (Part2)

An inside cladding of RPV in Hamaoka-5 caused pitting damage by sea water intrusion in 2011. For a restart of Hamaoka-5, we need a conservative evaluation such that SCC propagates instead of pitting. Two years ago, we reported metallurgical observation results in advance of SCC tests at AESJ conference. This is the progress report describing SCC test results obtained after the AESJ conference....
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A study on corrosion immunity of RPV inside cladding (2) Stress corrosion cracking test

Fact finding survey of actual RPV in decommissioning Hamaoka-1 has been under conducting. All boat samples was already transported to a domestic post irradiation examination facility (NFD). At NFD, irradiated materials were investigated as introduced in the 15th JSM conference. This is the progress report describing new results obtained after the conference....
英字タイトル:
Research on reactor pressure vessel in Hamaoka-1 (Part 2) - Material research utilizing decommissioning NPS -