Estimation of the Release Time of Radio-Tellurium During the Fukushima Daiichi Nuclear Power Plant Accident and Its Relationship to Individual Plant Events. (4th May 2019)

• Record Type: Journal Article
• Authors: Takahashi, Sentaro; Kawashima, Shigeto; Hidaka, Akihide; Tanaka, Sota; Takahashi, Tomoyuki
• Is Part Of: Nuclear technology. Volume 205:Number 5(2019)
• Page Start: 646
• Page End: 654
• Publication Date: 2019-05-04
• Subjects: Fukushima accident -- radio-tellurium -- simulation model -- deposition pattern -- plant events; Nuclear engineering -- Periodicals; Nuclear engineering; Nuclear Physics; Periodicals; Periodicals; 621.48
• DOI: 10.1080/00295450.2018.1521186
• Languages: English
• ISSNs: 1943-7471

Abstract

Abstract: A simulation model was developed to estimate the areal (surface) deposition pattern of 129m Te after the Fukushima Daiichi nuclear power plant (FDNPP) accident. Using this model, the timing and intensity of the 129m Te release were reverse estimated from the environmental monitoring data. Validation using 137 Cs data showed that the model simulated atmospheric dispersion and estimated surface deposition with relatively high accuracy. The estimated surface deposition pattern of 129m Te was consistent with the actual measured pattern. The estimated time and activity of 129m Te emissions indicated that 129m Te was predominantly emitted from FDNPP Unit 3.