Refine your search:     
Report No.
 - 
Search Results: Records 1-10 displayed on this page of 10
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Formation mechanisms of insoluble Cs particles observed in Kanto district four days after Fukushima Daiichi NPP accident

Hidaka, Akihide

Journal of Nuclear Science and Technology, 56(9-10), p.831 - 841, 2019/09

 Times Cited Count:3 Percentile:57.07(Nuclear Science & Technology)

The insoluble Cs particles (Type A) were firstly observed in Tsukuba-city on the morning of March 15. The particles have been considered to be generated in RPV of Unit 2 by evaporation/condensation based on the measured $$^{134}$$Cs/$$^{137}$$Cs ratio and the core temperatures of each unit. However, the Type A particles with smaller diameter than the Type B particles of Unit 1 origin, are covered by almost pure silicate glass and have a trace of the quenching. This indicates that the particles could have been generated due to the melting of the HEPA filter in SGTS by the fire of H$$_{2}$$ detonation at Unit 3, and atomization followed by quenching of the molten materials by air blast of the explosion. Although the particles were mostly dispersed to the sea because of the wind direction, some of them deposited onto the lower elevation of R/B at Unit 3, could have been subsequently re-suspended and released into the environment, by the steam flow in the R/B caused by restart of the Unit 3 core cooling water injection at 2:30 of March 15.

Journal Articles

HEPA filter clogging and volatile material release under solvent fire accident in fuel reprocessing facility

Ono, Takuya; Watanabe, Koji; Tashiro, Shinsuke; Amano, Yuki; Abe, Hitoshi

Proceedings of 25th International Conference on Nuclear Engineering (ICONE-25) (CD-ROM), 7 Pages, 2017/07

After the Fukushima-Daiichi accident, countermeasures against the severe accident are newly required as regulatory items for nuclear facilities. Organic solvent fire in cell was defined as one of the accidents in the fuel reprocessing plant. When the solvent burns, aerosols including soot are released. The substances clog HEPA filters in the ventilation system and their breakthrough may happen because of differential pressure rising. Moreover, the fire can also release volatile radioactive gaseous species, which can pass through HEPA filters. These phenomena are important for evaluation of confinement capability of the facility and public exposure. We have investigated, in relating to the clogging behavior, release behavior of aerosols as well as of volatile materials from burnt solvent. In the presentation, we will report experimental data and evaluation results obtained from recent research.

Journal Articles

Contamination control, clearing and radiation monitoring in nuclear research facilities

Ikezawa, Yoshio

Saikin No Kenkyu Shisetsu, 0, p.304 - 311, 1995/00

no abstracts in English

Journal Articles

Air monitoring and control in nuclear facilities

Ikezawa, Yoshio

Kurin Tekunoroji, 3(4), p.41 - 45, 1993/04

no abstracts in English

Journal Articles

Fire behavior and filter plugging during a postulated solvent fire in the extraction process of a nuclear fuel reprocessing plant

Hashimoto, Kazuichiro; Nishio, Gunji; Soda, Kunihisa

Nuclear Technology, 101, p.218 - 226, 1993/02

 Times Cited Count:5 Percentile:51.49(Nuclear Science & Technology)

no abstracts in English

JAEA Reports

Demonstration test on the safety of a cell ventilation system during a hypothetical explosive burning in a fuel reprocessing plant

Suzuki, Motoe; Nishio, Gunji; Takada, Junichi; Tsukamoto, Michio; Koike, Tadao

JAERI 1328, 90 Pages, 1993/01

JAERI-1328.pdf:4.24MB

no abstracts in English

Journal Articles

Confinement of smoke containing radioactive materials during solvent fire in nuclear fuel reprocessing plants

Hashimoto, Kazuichiro; Nishio, Gunji

Aerosols: Science,Industry,Health and Environment,Vol. 2, p.1159 - 1162, 1990/00

no abstracts in English

Journal Articles

Aerosols released in accidents in reprocessing plants

M.Y.Ballinger*; P.C.Owczarski*; ; ; S.Jordan*; W.Lindner*

Nuclear Technology, 81, p.278 - 292, 1988/00

 Times Cited Count:8 Percentile:65.79(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Penetration of high efficiency air filters for submicron DOP aerosol using a laser particle spectrometer

*; *;

Proc.5th Int.Symp.on Contamination Control, p.23 - 26, 1980/00

no abstracts in English

10 (Records 1-10 displayed on this page)
  • 1