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Qualification tests for detritiation to validate scrubber column technology for use at ITER DS with a pilot-scale scrubber column
https://repo.qst.go.jp/records/78370
https://repo.qst.go.jp/records/78370412e7a64-8d9a-41db-b7ed-da9bb9e4be93
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-01-08 | |||||
| タイトル | ||||||
| タイトル | Qualification tests for detritiation to validate scrubber column technology for use at ITER DS with a pilot-scale scrubber column | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Edao, Yuuki
× Edao, Yuuki× Kurata, Rie× Iwai, Yasunori× Isobe, Kanetsugu× Yamanishi, Toshihiko× Hayashi, Takumi× Willms, Scott× Edao, Yuuki× Kurata, Rie× Iwai, Yasunori× Isobe, Kanetsugu× Yamanishi, Toshihiko× Hayashi, Takumi |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The atmosphere detritiation system (DS) function is to remove tritium from the atmosphere to mitigate the impact on the environment in the case of accidental tritium release. The DS uses the technique of catalytic oxidation of tritium and collection of tritiated water vapor. The DS of ITER uses scrubber column technology for collection of tritiated water vapor, not water adsorption method conventionally used for DS, considering a failure occurrence probability of switching valves during long term operation. This technology is based on isotopic exchange between water vapor and liquid water to be arranged in a packed type column. This technology has never been applied to the DS of existing tritium facilities. Hence, qualification tests have been performed for detritiation to validate scrubber column technology for use at ITER with a pilot-scale scrubber column of 1/5 size of an ITER scale. The test column was filled with packing material and internal components of the same type as is used at ITER. In this qualification test, key objectives of the scrubber column design are to 1) collect tritium to meet DS design requirements, 2) achieve high reliability/availability and 3) avoid production of excessive tritiated water to be processed by WDS. The qualification test shows that detritiation factor (DF) is strongly influenced by a liquid flow rate with increasing the liquid flow rate resulting in higher DF. DF of scrubber column highly depends on lambda value which is defined as a flow rate of gas/liquid. A scrubber column of 2.88 m height with sufficient wettability of packing and efficient water dispersion by water distributor achieved high DF in the condition that lambda is one. Test results indicate that scrubber column technology achieves both high availability for detritiation and reduction of tritiated water production. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 12th International Conference on Tritium Science and Technology (Tritium 2019) | |||||
| 発表年月日 | ||||||
| 日付 | 2019-04-24 | |||||
| 日付タイプ | Issued | |||||
