A simple model for 135Xe-level evaluation in neutronic analysis of a PWR core

Galperin, A.; Goldfeld, A.; Karni, Y.

doi:10.1016/0306-4549(85)90108-2

Cited by 1 publication

(2 citation statements)

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“…The contributing factors for this are a function of several variables: Distinctive 134 Cs/ 137 Cs and 135 Cs/ 137 Cs associated with each of the FDNPP Reactor Units 1–3 27 , 32 . In addition, 135 Cs/ 137 Cs atom ratios are expected to vary through reactor cores, therefore individual reactor cores may have emitted inconsistent 135 Cs/ 137 Cs 44 . The Reactor Units released material in variable quantities between 12/03/2011 and 23/03/2011 1 : For total 137 Cs release by FDNPP, reported contributions for Reactor Units 1, 2 and 3 are 3.18%, 91.5% and 4.64%, respectively 24 .…”

Section: Discussionmentioning

confidence: 99%

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Spatial pattern of plutonium and radiocaesium contamination released during the Fukushima Daiichi nuclear power plant disaster

Dunne

Martin

Yamashiki

et al. 2018

Sci Rep

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Plutonium and radiocaesium are hazardous contaminants released by the Fukushima Daiichi nuclear power plant (FDNPP) disaster and their distribution in the environment requires careful characterisation using isotopic information. Comprehensive spatial survey of 134Cs and 137Cs has been conducted on a regular basis since the accident, but the dataset for 135Cs/137Cs atom ratios and trace isotopic analysis of Pu remains limited because of analytical challenges. We have developed a combined chemical procedure to separate Pu and Cs for isotopic analysis of environmental samples from contaminated catchments. Ultra-trace analyses reveal a FDNPP Pu signature in environmental samples, some from further afield than previously reported. For two samples, we attribute the dominant source of Pu to Reactor Unit 3. We review the mechanisms responsible for an emergent spatial pattern in 134,135Cs/137Cs in areas northwest (high 134Cs/137Cs, low 135Cs/137Cs) and southwest (low 134Cs/137Cs, high 135Cs/137Cs) of FDNPP. Several samples exhibit consistent 134,135Cs/137Cs values that are significantly different from those deposited on plant specimens collected in previous works. A complex spatial pattern of Pu and Cs isotopic signature is apparent. To confidently attribute the sources of mixed fallout material, future studies must focus on analysis of individual FDNPP-derived particles.

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Section: Discussionmentioning

confidence: 99%

“…Distinctive 134 Cs/ 137 Cs and 135 Cs/ 137 Cs associated with each of the FDNPP Reactor Units 1–3 27 , 32 . In addition, 135 Cs/ 137 Cs atom ratios are expected to vary through reactor cores, therefore individual reactor cores may have emitted inconsistent 135 Cs/ 137 Cs 44 .…”

Section: Discussionmentioning

confidence: 99%