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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Latest News
DOE issues new NEPA rule and procedures—and accelerates DOME reactor testing
Meeting a deadline set in President Trump’s May 23 executive order “Reforming Nuclear Reactor Testing at the Department of Energy,” the DOE on June 30 updated information on its National Environmental Policy Act (NEPA) rulemaking and implementation procedures and published on its website an interim final rule that rescinds existing regulations alongside new implementing procedures.
Masato Takahashi, Kenichi Yoshioka
Nuclear Technology | Volume 187 | Number 3 | September 2014 | Pages 316-327
Technical Paper | Reactor Safety | doi.org/10.13182/NT13-114
Articles are hosted by Taylor and Francis Online.
The three radioactive isotopes of 134Cs, 136Cs, and 137Cs related to the boiling water reactor (BWR) accident at the units of the Fukushima Daiichi nuclear power plant (NPP) have been measured in samples obtained from NPPs around the area and from inside the Fukushima Daiichi buildings. Numerical calculations with sensitivity analyses were carried out to estimate the cesium (Cs) isotope composition in the BWR core, and the origins of the Cs in the samples were clarified based on numerical calculations. Most of the measured Cs radioactivity data suggest that Cs was released from the homogenized state among fuel bundles with different irradiation histories in the core. The origins of the large 134Cs/136Cs ratios in the Unit 2 spent fuel pool (SFP) suggest two possibilities. One possibility is the existence of a partial release process from the fuel bundles located in the peripheral core region, and the other is damage to the fuel placed in the SFP.
