The dynamics of radiocesium in the hydrosphere ecosystem of exclusive inland lakes (Lake Onuma)
Creators
- 1. Tokyo City University, Atomic Energy Research Laboratory, Kawasaki, Kanagawa (Japan)
Description
After the accident at FDNPP, the effects of radioactive Cs were observed on wakasagi in Lake Onuma, Gunma Prefecture. Lake Onuma is an exclusive inland lake of the hydrosphere ecosystem. The decay rate of 137Cs concentration in lake water has been almost constant since 2015. We examined the seasonal dynamics of the activities Cs in wakasagi and lake water. In Lake Onuma, from June to October, the upper and deep layers of the lake form a thermocline and do not circulate. At that time, the amount of dissolved 137Cs increases in the deep layer and the state becomes anoxic. We are investigating the adsorption rate of radioactive Cs in the sediment of Lake Onuma. In addition, stable Cs in the sediment is also analyzed to investigate the relationship with the adsorption of radioactive Cs. (author)
Additional details
Additional titles
- Original title (Japanese)
- 閉鎖性湖沼における放射性セシウムの動態解明(赤城大沼)
Publishing Information
- Journal Title
- Hoshasen
- Journal Volume
- 46
- Journal Issue
- 3
- Series
- 雑誌名:放射線
- Journal Page Range
- p. 102-107
- ISSN
- 0285-3604
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 54016967
- Subject category
- S54: ENVIRONMENTAL SCIENCES;
- Descriptors DEI
- ADSORPTION; CESIUM 137; ECOSYSTEMS; FISSION PRODUCT RELEASE; FUKUSHIMA DAIICHI NUCLEAR POWER STATION; GAMMA SPECTROSCOPY; LAKES; LEAD 210; MELTDOWN; NUCLEAR POWER PLANTS; PLANKTON; RADIATION MONITORING; RADIOACTIVITY; RADIONUCLIDE MIGRATION; SCANNING ELECTRON MICROSCOPY; SEDIMENTS
- Descriptors DEC
- ACCIDENTS; ALPHA DECAY RADIOISOTOPES; AQUATIC ORGANISMS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BEYOND-DESIGN-BASIS ACCIDENTS; CESIUM ISOTOPES; ELECTRON MICROSCOPY; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; HEAVY NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; LEAD ISOTOPES; MASS TRANSFER; MICROSCOPY; MONITORING; NUCLEAR FACILITIES; NUCLEI; ODD-EVEN NUCLEI; POWER PLANTS; RADIOISOTOPES; REACTOR ACCIDENTS; REACTOR SITES; SEVERE ACCIDENTS; SORPTION; SPECTROSCOPY; SURFACE WATERS; THERMAL POWER PLANTS; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 27 refs., 8 figs., 1 tab.