JPS61230096A - Emergency radioactive gas treater - Google Patents
Emergency radioactive gas treaterInfo
- Publication number
- JPS61230096A JPS61230096A JP7138685A JP7138685A JPS61230096A JP S61230096 A JPS61230096 A JP S61230096A JP 7138685 A JP7138685 A JP 7138685A JP 7138685 A JP7138685 A JP 7138685A JP S61230096 A JPS61230096 A JP S61230096A
- Authority
- JP
- Japan
- Prior art keywords
- radioactive
- emergency
- filter
- processing device
- gas processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
［発明の技術分野］
本発明は原子力発電所において、万一の事故等の非常時
に放出される放射能、特に放射性ヨウ素を捕集、除去す
るための非常用放射性ガス処理装置に関する。
［発明の技術的前１３１Ｆ
一般に原子力施設では万一の事故等により建物内で発生
した放射性ガスの外部への漏洩を防止するため換気系に
より建物内を負圧に保つとともに換気系に放射性ガスの
内容に応じて非常用放射性ガス処理装置を設置し、排ガ
ス中に含まれる放射性ガス、すなわち放射性ヨウ素や希
ガスさらに気流などで舞いあがるコバルト等の放射性粒
子物質を除去した後、最終的に排気筒より環境へ放出さ
れるような処理系が設けられている。
このような処理系に設置される従来の非常用放射性ガス
処理装置の、特に放射性ヨウ素を対象とした一例を第６
図に示す。
図において排ガス中に含まれる放射性物質は、まず放射
性粒子物質がプレフィルタ３およびＨＥＰＡフィルタ４
により捕集除去され、次いで破砕状のヤシ穀活性炭にＫ
Ｉ＋Ｉｚを含浸させたＫＩ３添着活性炭よりなる放射性
ヨウ素除去用フィルタ５により放射性ヨウ素が除去され
るように構成されている。同図において符号１は湿分除
去装置、２は電気加熱機、および６はスペースヒータで
ある。[Technical Field of the Invention] The present invention relates to an emergency radioactive gas treatment device for collecting and removing radioactivity, particularly radioactive iodine, released in a nuclear power plant in the event of an accident or other emergency. [Technical Priority of the Invention 131F Generally, in nuclear facilities, in order to prevent radioactive gas generated within the building from leaking to the outside in the event of an accident, the inside of the building is maintained at negative pressure by the ventilation system, and the ventilation system is also used to prevent radioactive gas from leaking outside the building. Depending on the situation, emergency radioactive gas treatment equipment is installed to remove radioactive gases contained in the exhaust gas, including radioactive iodine, rare gases, and radioactive particulate matter such as cobalt that rises in air currents. A treatment system is provided for release into the environment. An example of a conventional emergency radioactive gas processing device installed in such a processing system, especially for radioactive iodine, is shown in Part 6.
As shown in the figure. In the figure, the radioactive substances contained in the exhaust gas are radioactive particulate substances that are filtered through the pre-filter 3 and the HEPA filter 4.
K is collected and removed by
Radioactive iodine is removed by a radioactive iodine removal filter 5 made of KI3-impregnated activated carbon impregnated with I+Iz. In the figure, numeral 1 is a moisture removal device, 2 is an electric heater, and 6 is a space heater.
このような従来の非常用放射性ガス処理装置では放射性
ヨウ素除去材として粒状のＫＩ３添看活性炭を用い、こ
れをトレイ等に充填してフィルタベッドとしている。こ
のため、フィルタの交換時においては活性炭つめかえの
ための特別の装置が必要とされるとともにフィルタの交
換に長時間を要するなど取扱上不便な点があった。
［発明の目的］
本発明はこのような欠点を解消ずべくなされたもので、
フィルタの交換が容易にでき、しかも放射性ガス中の放
射性ヨウ素等に対する除去性能を低下させることのない
フィルタを備えた非常用放射性ガス処理装置を提供する
ことを目的とする。
［発明の概要］
すなわち、本発明の非常用放射性ガス処理装置は、出入
れ可能なフィルタユニットを備え、このフィルタユニッ
トにより放射性物質を捕集する非常用放射性ガス処ｙＩ
！Ｗｊ装置であって、前記フィルタユニットは放射性ヨ
ウ素捕集物質を添着した活性炭素繊維を含む放射性物質
除去材を枠体に収納したものであることを特徴とする。
［発明の実施例］
以下、本発明の詳細を図面に示す一実施例について説明
する。
第１図は本発明の一実施例を示すもので、図中、第６図
と共通する部分は同一符号が付されており、この点は以
下の図も同様である。
第１図において符号７は放射性ヨウ素捕集物質添着活性
炭素繊維よりなるフィルタユニットである。これは活性
炭素繊維に放射性ヨウ素捕集物質として知られるＫＩ＋
Ｉｚ１ＴＥＤＡ、硝酸銀等をＦＩＡＩ！シて加工したも
のを例えば第２図に示すようにスペーサ８を介在させて
折りたたみ、枠体に収納してフィルタユニット７とした
ものである。
なお、この非常用放射性ガス処理装置には、フィルタユ
ニット７の他に湿分除去装置１、電気加熱機２、プレフ
ィルタ３、放射性粒子物質を除去するためのＨＥＰＡフ
ィルタ４およびスペースヒータ６が設置されている。
次に本発明によるＫｌｓ添着活性炭素繊維で構成ぎれた
フィルタユニットを使用した場合と、従来のＫｌｓ添着
活性炭を使用した場合とで放射性ヨウ素除去能力を比較
した。除去能力の比較はＣＨｓｌの反応速度定数（ｋ値
、１／ｓｅ＋ｃ）を求めることによって行い、このに値
が大きいほど放射性ヨウ素除去能力が高いことを意味す
る。なお、ｋ値は次の式（１）によって求められる。
−に書
ｐ −ｅ ・・・・・・・・・（１）式中、ｐは透
過率、（は接触時間（ｓｅｃ）で表され、さらに接触時
間ｔは次の式（２）によって求められる。
ｔ −ｚ ／ｕ・・・・・・・・・（２）式中、２はフ
ィルタ厚さくＣＩ） 、ｕ Ｇ；ｔｓｉ＊慣（ＣＩ／ｓ
ｅｃ ）を表す。
実験の結果、本発明による放射性ヨウ素除去材は従来の
ものに比較して２〜５倍のに値を示すことがわかった。
また本発明の放射性物質除去材は第４図に示すように放
射性ヨウ素捕集物質添看活性炭素繊１１１９の両面にト
ＩＥＰＡフィルタ１０を重ねてはりあわせたものであっ
てもよく、これを第３図に示すように折りたたみ、スペ
ーサ８を介在させて枠体に収納したフィルタユニット１
１としてもよい。この場合はガス処理装置内に従来設置
されていた１」ＥＰＡフィルタ４を別に設置する必要が
なく、フィルタユニット１１内に一体に組込まれるので
、ガス処理装置全体としては第５図に示すようなものと
なる。従って装置の小型化、それにともなう設置スペー
スの大幅な縮小とコストダウンが可能となる。
［発明の効果］
以上の説明から明らかなように、本発明によればフィル
タの交換が容易でかつ装置の小型化も可能である。また
、フィルタ交換に要する時間が短縮される結果、被爆低
減にも効果がある。In such a conventional emergency radioactive gas processing device, granular KI3 activated carbon is used as a radioactive iodine removal material, and the granular activated carbon is filled into a tray or the like to form a filter bed. Therefore, when replacing the filter, a special device for refilling the activated carbon is required, and it takes a long time to replace the filter, which is inconvenient in handling. [Object of the invention] The present invention has been made to solve these drawbacks,
It is an object of the present invention to provide an emergency radioactive gas processing device equipped with a filter that allows easy replacement of the filter and does not reduce the removal performance for radioactive iodine, etc. in radioactive gas. [Summary of the Invention] That is, the emergency radioactive gas processing device of the present invention is equipped with a filter unit that can be taken in and out, and that collects radioactive substances using the filter unit.
! In the Wj device, the filter unit is characterized in that a radioactive substance removal material containing activated carbon fibers to which a radioactive iodine collection substance is attached is housed in a frame. [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In the figure, parts common to those in FIG. 6 are designated by the same reference numerals, and the same applies to the following figures. In FIG. 1, reference numeral 7 denotes a filter unit made of activated carbon fiber impregnated with a radioactive iodine collecting substance. This is activated carbon fiber containing KI+, which is known as a radioactive iodine trapping substance.
FIAI Iz1TEDA, silver nitrate, etc.! The filter unit 7 is obtained by folding the processed product with a spacer 8 interposed therebetween and storing it in a frame as shown in FIG. 2, for example. In addition to the filter unit 7, this emergency radioactive gas processing device is equipped with a moisture removal device 1, an electric heater 2, a pre-filter 3, a HEPA filter 4 for removing radioactive particulate matter, and a space heater 6. has been done. Next, the radioactive iodine removal ability was compared between the case where a filter unit composed of Kls-impregnated activated carbon fiber according to the present invention was used and the case where conventional Kls-impregnated activated carbon was used. The removal ability was compared by determining the reaction rate constant (k value, 1/se+c) of CHsl, and the larger the value, the higher the radioactive iodine removal ability. Note that the k value is determined by the following equation (1). -Write p -e...In equation (1), p is transmittance, (is contact time (sec), and contact time t is calculated using the following equation (2). t - z / u ...... (2) In the formula, 2 is the filter thickness CI), u G; tsi * custom (CI/s
ec ). As a result of experiments, it was found that the radioactive iodine removing material according to the present invention exhibits a value 2 to 5 times higher than that of the conventional material. Further, the radioactive substance removal material of the present invention may be one in which IEPA filters 10 are laminated on both sides of activated carbon fibers 1119 with radioactive iodine-trapping substances, as shown in FIG. As shown in Figure 3, the filter unit 1 is folded and stored in a frame with a spacer 8 interposed therebetween.
It may be set to 1. In this case, there is no need to separately install the 1'' EPA filter 4, which was conventionally installed in the gas treatment equipment, and it is integrated into the filter unit 11, so the entire gas treatment equipment is as shown in Fig. 5. Become something. Therefore, it is possible to downsize the device and thereby significantly reduce the installation space and cost. [Effects of the Invention] As is clear from the above description, according to the present invention, the filter can be easily replaced and the device can be downsized. Furthermore, since the time required for filter replacement is shortened, it is also effective in reducing radiation exposure.
第１図は本発明の一実施例を示す非常用放射性ガス処理
装置のブロック図、第２図は本発明で使用するフィルタ
ユニットの斜視図、第３図は他の実施例における放射性
物質除去材をフィルタユニットに収納するときの状態を
示す図、第４図は第３図のＡ部の拡大断面図、第５図は
同実施例を示す非常用放射性ガス処理装置のブロック図
、第６図は従来の非常用放射性ガス処理装置を示すブロ
ック図である。
１・・・・・・・・・・・・湿分除去装置２・・・・・
・・・・・・・電気加熱機、３・・・・・・・・・・・
・プレフィルタ４．１０・・・ＨＥＰＡフィルタ
５・・・・・・・・・・・・放射性ヨウ素除去用フィル
タ６・・・・・・・・・・・・スペースヒータ７．１１
・・・フィルタユニット
８・・・・・・・・・・・・スペーサ
９・・・・・・・・・・・・放射性ヨウ素捕集物質添着
活性炭素繊維
第１図
第２図
す
第４図 第３図Fig. 1 is a block diagram of an emergency radioactive gas processing device showing one embodiment of the present invention, Fig. 2 is a perspective view of a filter unit used in the present invention, and Fig. 3 is a radioactive substance removal material in another embodiment. Fig. 4 is an enlarged sectional view of part A in Fig. 3, Fig. 5 is a block diagram of the emergency radioactive gas processing device showing the same embodiment, Fig. 6 FIG. 1 is a block diagram showing a conventional emergency radioactive gas processing device. 1...Moisture removal device 2...
・・・・・・・Electric heating machine, 3・・・・・・・・・・・・・
・Pre-filter 4.10...HEPA filter 5...Radioactive iodine removal filter 6...Space heater 7.11
・・・Filter unit 8・・・・・・・・・・・・Spacer 9・・・・・・・・・Activated carbon fiber impregnated with radioactive iodine-trapping material Fig. 1 Fig. 2 Fig. 4 Figure 3
Claims (2)
タユニットにより放射性物質を捕集する非常用放射性ガ
ス処理装置であって、前記フィルタユニットは放射性ヨ
ウ素捕集物質を添着した活性炭素繊維を含む放射性物質
除去材を枠体に収納したものであることを特徴とする非
常用放射性ガス処理装置。(1) An emergency radioactive gas processing device that includes a filter unit that can be taken in and out, and that collects radioactive materials using the filter unit, wherein the filter unit is a radioactive gas processing device that includes activated carbon fibers impregnated with a radioactive iodine-collecting material. An emergency radioactive gas processing device characterized by storing a removal material in a frame.
した活性炭素繊維と放射性粒子除去フィルタとを層状に
貼り合わせたものである特許請求の範囲第１項記載の非
常用放射性ガス処理装置。(2) The emergency radioactive gas processing device according to claim 1, wherein the radioactive material removal material is a layered combination of activated carbon fibers impregnated with a radioactive iodine collection material and a radioactive particle removal filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7138685A JPS61230096A (en) | 1985-04-04 | 1985-04-04 | Emergency radioactive gas treater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7138685A JPS61230096A (en) | 1985-04-04 | 1985-04-04 | Emergency radioactive gas treater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61230096A true JPS61230096A (en) | 1986-10-14 |
Family
ID=13459019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7138685A Pending JPS61230096A (en) | 1985-04-04 | 1985-04-04 | Emergency radioactive gas treater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61230096A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09152498A (en) * | 1995-12-01 | 1997-06-10 | Tokyo Denki Komusho:Kk | Mobile local air discharge apparatus for catching of radioactive iodine |
| JP2006090963A (en) * | 2004-09-27 | 2006-04-06 | Toshiba Corp | Radioactive dust monitor |
| JP2012002606A (en) * | 2010-06-15 | 2012-01-05 | Mitsubishi Heavy Ind Ltd | Radioactive iodine adsorbent and radioactive iodine removal device |
| KR20210151036A (en) * | 2019-11-29 | 2021-12-13 | 방극진 | Mask for protect against radioactive substance and dust |
-
1985
- 1985-04-04 JP JP7138685A patent/JPS61230096A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09152498A (en) * | 1995-12-01 | 1997-06-10 | Tokyo Denki Komusho:Kk | Mobile local air discharge apparatus for catching of radioactive iodine |
| JP2006090963A (en) * | 2004-09-27 | 2006-04-06 | Toshiba Corp | Radioactive dust monitor |
| JP4709515B2 (en) * | 2004-09-27 | 2011-06-22 | 株式会社東芝 | Radioactive dust monitor |
| JP2012002606A (en) * | 2010-06-15 | 2012-01-05 | Mitsubishi Heavy Ind Ltd | Radioactive iodine adsorbent and radioactive iodine removal device |
| US9044737B2 (en) | 2010-06-15 | 2015-06-02 | Mitsubishi Heavy Industries, Ltd. | Radioactive iodine adsorbent and radioactive iodine removal apparatus |
| KR20210151036A (en) * | 2019-11-29 | 2021-12-13 | 방극진 | Mask for protect against radioactive substance and dust |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3925046A (en) | Radioactive gas standby treatment apparatus with high efficiency rechargeable charcoal filter | |
| GB2012627B (en) | Filter apparatus for filtering air contaminated by dust and fibre waste | |
| SE9200533L (en) | A filter device for connection to a person's respiratory system comprising a housing containing a moisture-heat-exchanging material and a bacteria-absorbing filter consisting of a pleated, air-permeable material | |
| JPS61230096A (en) | Emergency radioactive gas treater | |
| US9017458B2 (en) | Method of concurrently filtering particles and collecting gases | |
| JPH02234770A (en) | Respirator/filter for removing water containing tritium | |
| AU2011278415A1 (en) | Microbicidal filter and filter cartridge incorporating such a filter | |
| GB2002256B (en) | Method of radioactive offgas filtration and filter regeneration and device for implementing the method | |
| WO2013014472A1 (en) | Filter box assembly and filter unit | |
| JP2003066191A (en) | Processing method for radioactive gas and filter device for adsorbing radioactive gas | |
| JPH0634892B2 (en) | Adsorption property | |
| JP6368129B2 (en) | How to remove radioactive material | |
| JP2004191347A (en) | Filter device for adsorption of radioactive gas | |
| JPH0616385Y2 (en) | Adsorption member for the case for removing radioactive substances | |
| Cederberg et al. | Containment of Iodine-131 Released by the RaLa Process | |
| JP2002355300A (en) | Deoidorizing filter and air cleaner | |
| CN213221507U (en) | MMP particulate matter remove device | |
| JPS5560899A (en) | Filter exchanging method in radioactive dust*gas removal unit | |
| JPH0534495A (en) | Containment vessel vent device | |
| JP4083300B2 (en) | Processing method of used HEPA filter media sheet | |
| JPS59147615A (en) | Filter device | |
| CN216604660U (en) | Radioactive waste gas filtration system | |
| JPS61148395A (en) | Emergency gas treater | |
| JPS55134616A (en) | Device for regenerating and purifying filter bed made of granular substance | |
| JP3240318B2 (en) | Atmospheric hazardous substance removal equipment |