JPS5991399A - Outer surface cleaning device of nuclear fuel - Google Patents
Outer surface cleaning device of nuclear fuelInfo
- Publication number
- JPS5991399A JPS5991399A JP57200273A JP20027382A JPS5991399A JP S5991399 A JPS5991399 A JP S5991399A JP 57200273 A JP57200273 A JP 57200273A JP 20027382 A JP20027382 A JP 20027382A JP S5991399 A JPS5991399 A JP S5991399A
- Authority
- JP
- Japan
- Prior art keywords
- water
- container
- nuclear fuel
- air
- fuel
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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
【発明の詳細な説明】
原子力発電所における１次系機器、配管等１／（おいて
は、放射性クラッドが蓄積して、運転員、保修員等の被
曝の危険性が増すため、前記放射性クラッドの発生量を
減らすこと、それを回収することなどの手段が必要であ
る。DETAILED DESCRIPTION OF THE INVENTION In primary system equipment, piping, etc. in nuclear power plants, radioactive cladding accumulates and increases the risk of radiation exposure for operators, maintenance personnel, etc. Measures are needed to reduce the amount of waste generated and to recover it.
前記放射性クラッドは、機器、配管のステンレ。The radioactive cladding is stainless steel for equipment and piping.
ス面等から溶出したニッケル、コバルトが原子炉容器内
の燃料棒に付着し、原子炉内で中性子等を受けて放射能
化するなどにより発生しｃ４■）び剥離し機器、配管に
達するため、機器、配管側における放射性クラッドを除
去するのは必１ｉ：Ｌ ＜、年１回行われる燃料交換の
際に炉内から取出され１）使用に供される約２４の核燃
料集合体におけるツｔ“ζ料棒表面からクラッドを取去
ることは可能でＸ）るが、該核燃料集合体は、例えば１
７列×１７列の燃料棒の行列になっているため、前記燃
料棒の外面に付着しているクラッドを機械的な手段によ
って除去するのは不可能であって独特の手段、装置が必
要である。Nickel and cobalt eluted from the surface of the reactor adhere to the fuel rods in the reactor vessel, become radioactive when exposed to neutrons in the reactor, etc., and then peel off and reach equipment and piping. It is necessary to remove radioactive crud from the equipment and piping sides. “It is possible to remove the cladding from the surface of the fuel rod, but the nuclear fuel assembly
Since the fuel rods are arranged in a matrix of 7 rows by 17 rows, it is impossible to remove the crud attached to the outer surface of the fuel rods by mechanical means, and unique means and equipment are required. be.
本発明は、前記のような実情に鑑み開発された核燃料の
外面清掃装置に係り、遮蔽水中に設置される開閉上蓋を
備えた核燃料の容器と、該容器の下部側圧配置され同容
器内に噴射する噴射ノズルと、該噴射ノズルに連絡した
水・空気混合器と、該水・空気混合器に連終した水ポン
プおよび空気導入管と、前記容器の上部側に連絡される
分ｈＩＬ器とを具備した点ｌ／ｃ特徴を有するものであ
って、その目的とする処は、遮蔽水中に設置されている
イｒ器中の核燃料に混合気・水を噴射することｌ／Ｃよ
り核燃料に付着しているクラッドを効率よ（除去するこ
とができる核燃料の外面清掃４！！２Ｋを供する点にあ
る。The present invention relates to an apparatus for cleaning the outer surface of nuclear fuel, which was developed in view of the above-mentioned circumstances, and includes a nuclear fuel container equipped with an opening/closing top lid that is installed in shielding water, and a nuclear fuel container that is placed under side pressure at the bottom of the container and injects water into the container. a water/air mixer connected to the injection nozzle, a water pump and an air introduction pipe connected to the water/air mixer, and a minute hIL device connected to the upper side of the container. The purpose of this is to inject the mixture and water into the nuclear fuel in the reactor installed in the shielding water, and to prevent it from adhering to the nuclear fuel from the l/c. It provides 4!!2K for cleaning the outer surface of nuclear fuel, which can remove the crud efficiently.
水元明け、前記のｔＭ成になっており、逗蔽水中に設置
される開閉上蓋を備えた核燃料の容器と、該容器の一丁
部側に配置され同容器内に噴射する噴射ノズルと、該噴
射ノズルに連絡した水・空気混合器と、成木・空気混合
器に連絡した水ポンプおよび空気導入管と、前記容器の
上部側に連絡される分離器とを具備しくいるので、ポン
プＩして高圧と１ｆり水・空気混合器によって混合され
て噴射ノズルから超音波状に噴射される混合気・水が、
遮蔽水中に設置１イされている容器中の核燃料外面に下
部側から吹きつけられ、核燃料の外面に付着しているク
ラッドを極めて容易に効率よく除去して清掃することが
できる。At the beginning of the water, the nuclear fuel container is in the above-mentioned tM configuration and is equipped with an openable and closable top lid that is installed in the water, and an injection nozzle that is placed on one side of the container and injects into the container. The pump I is equipped with a water/air mixer connected to the injection nozzle, a water pump and an air introduction pipe connected to the mature tree/air mixer, and a separator connected to the upper side of the container. The air-fuel mixture/water is mixed with high pressure by a 1F water/air mixer and injected in an ultrasonic manner from an injection nozzle.
The outer surface of the nuclear fuel in the container installed in the shielding water is sprayed from the lower side, and the crud adhering to the outer surface of the nuclear fuel can be removed and cleaned very easily and efficiently.
以下、本発明の実施例を図示について説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
添伺図に本発明の一実施例を示し、図中（１１は、有孔
支持部旧（２）上に核燃料（σ）を縦方向に収容すると
ともに開閉上蓋（３）を備えた核燃料の容器であって、
該容器（１１は、炉内の核燃料交換に際し同核燃料を収
容して放射能遮蔽用の遮蔽水中に貯蔵するために使用さ
れるものであって、遮蔽水中に深く設置されている。An accompanying drawing shows an embodiment of the present invention. A container,
The container (11) is used to contain nuclear fuel and store it in shielded water for radioactivity shielding when exchanging nuclear fuel in the reactor, and is installed deep in the shielded water.
該実施例における核燃料の外面清掃装置１ｔは、前記の
容器（１）を使用し、該容器（１）と同容器（１）の下
部側即ち有孔支持部材（２）の下側に配置され同容器（
１）内の核燃料（σ）に混合気・水を強力に噴射する噴
射ノズル（４）と、該噴射ノズル（４）に連絡した水・
空気混合器（５）と、成木・空気混合器（５）Ｋ連絡し
た水ポンプ（６ｉと、同じく空気を導入する空気導入管
（７）と、前記容器（１）の上部側に連絡される気・液
の分離器（８）と、分離器（８）に連絡した排水側のフ
ィルタ（９）とよりなり、核燃料（ｅｌ）を収容した容
器（１１に噴射ノズル（４）と分離器（７）を図示のよ
うに配置４．シて使用する構造になっている。The nuclear fuel external surface cleaning device 1t in this embodiment uses the container (1) described above, and is arranged on the lower side of the container (1), that is, on the lower side of the perforated support member (2). The same container (
1) An injection nozzle (4) that powerfully injects air-fuel mixture/water into the nuclear fuel (σ) in
The air mixer (5) is connected to the water pump (6i) connected to the mature tree/air mixer (5), and the air introduction pipe (7) that also introduces air is connected to the upper side of the container (1). It consists of a gas/liquid separator (8), a filter (9) on the drainage side connected to the separator (8), and an injection nozzle (4) and a separator in a container (11) containing nuclear fuel (EL). (7) is arranged and used as shown in the figure.
図示した実施例は、前記の構造になっているので、水ポ
ンプ（６）を駆動して水を加圧して供給すると空気導入
管（７）から空気が導入され、水・空気混合器（５）で
７１７合されて空気混合高圧水となり、噴射ノズル（４
）によって混合気・水を強力に超音波状に容器１１１内
の核燃料（σ）の外面に噴射することができる。The illustrated embodiment has the above-mentioned structure, so when the water pump (6) is driven to supply pressurized water, air is introduced from the air introduction pipe (7), and the water/air mixer (5) is supplied with water under pressure. ) to form air-mixed high-pressure water, which is then sent to the injection nozzle (4
), the mixture/water can be injected into the outer surface of the nuclear fuel (σ) in the container 111 in a powerful ultrasonic manner.
しかして、石器（１）内に収容されている核燃料（σ）
の各燃オ′・１棒自付は崩壊熱欠イ■し、該燃料棒の外
面には、前記の噴射混合気・水の水および空気が糾問的
にかつ連続的に交互に強く当るため、同外面に局部的１
’ｘ伸差が生じ付着しているクラッドを効率よ＜ ＜／
、ｌｊ ｌ’ｉｆＬでき、かつ、前記噴射混合気・水は
狭い間隔内にも十分に波及し、各燃料４ヤの外面にわた
って前Ｎ＋４クラツドの、１７＋１離が可能とｌ、（す
、極めて高効率のクラッド除去機能が得「）れる。Therefore, the nuclear fuel (σ) contained in the stone tool (1)
Each fuel rod has a lack of decay heat, and the water and air of the injected mixture/water hit the outer surface of the fuel rod aggressively and continuously alternately. , locally 1 on the same outer surface
'x Efficiency of adhered cladding due to differential expansion<<//
, lj l'ifL, and the injected air-fuel mixture/water sufficiently spreads within a narrow space, and it is possible to separate the front N+4 cruds by 17+1 over the outer surface of each fuel layer (extremely high Efficient crud removal function is obtained.
剥離したクラッドを含有しＣいる空気混合高圧水け、什
器（１）の上ｆ’ｔｌｓ側から分離器（８１に至り、空
気が分目１ｔされたのち、フィルタ（９）でクラッドを
補促し、水はビットへ排水される。The air containing the separated crud is mixed with high-pressure water, reaches the separator (81) from the upper f'tls side of the fixture (1), and after the air is removed every minute, the crud is supplemented with the filter (9). , the water is drained into the bit.
従って、１）１１記実施例によれば、核燃料集合体部ら
核火１１：旧（σ）の多Ｕの燃料棒の外面からクラッド
を１ヴめで容易にかつ効率よく除去して清掃でき、その
操作は遮断水中で行われるため極めて安全な作業となり
、かつ同時にクラッドを袖促して回収することもできる
。Therefore, 1) according to the 11th embodiment, it is possible to easily and efficiently remove and clean the crud from the outer surface of the nuclear fire 11:old (σ) multi-U fuel rod from the nuclear fuel assembly in the first step; The operation is extremely safe as it is carried out under water, and at the same time the crud can be lifted up and recovered.
なお、前記実施例では、容器（１）の有孔支持部旧（２
）の下側即ち、底側から混合気・水を噴射する場合につ
いて説明したが、容器（１）の下部用（１１寄りの側壁
側から噴射することも可能である。In addition, in the above embodiment, the perforated support part (2) of the container (1)
), that is, from the bottom side, but it is also possible to inject the mixture and water from the side wall side closer to the lower part (11) of the container (1).
以上本発明を実施例について説明したが、勿論本発明は
このような実施例にだけ局限されて）ものではな（、本
発明の精神を逸脱し１．（い範囲内で種々の設計の改変
を施しうるものでｋ）る。Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments. k).
添付図は本発明の一実施例な示す核燃料の外面清掃装置
６．の機構図であえ）。
１：容器（核燃料の） ２：有孔支］テｒ’ｒｌ、：（
」ろ：開閉上蓋 ４：噴射ノズル５：水・空気
混曾器 ６：水丹？ンプ７：空気導入管 ８：
分ド；（シ器９：フィルタThe attached figure shows an apparatus for cleaning the outer surface of nuclear fuel 6, which is an embodiment of the present invention. Mechanism diagram). 1: Container (of nuclear fuel) 2: Perforated support] ter'rl, :(
RO: Opening/closing top lid 4: Injection nozzle 5: Water/air mixer 6: Water tank? Pump 7: Air introduction pipe 8:
Minute; (Sheet 9: Filter
Claims (1)
、該容器の下部側圧配置され同容器内に噴射する噴射ノ
ズルと、該噴射ノズルに連絡した水・空気混合器と、該
水・空気混合器に連絡した水７ドンブおよび空気導入管
と、前記容器の上部側に連絡される分離器とを具備した
ことを特徴とする核燃料の外面清掃装置。A nuclear fuel container with an opening/closing top lid installed in the thrusting water, an injection nozzle placed under the bottom side of the container and injecting into the container, a water/air mixer connected to the injection nozzle, and the water/air. 1. An apparatus for cleaning the outer surface of nuclear fuel, comprising: a water donb and an air introduction pipe connected to a mixer; and a separator connected to the upper side of the container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57200273A JPS5991399A (en) | 1982-11-17 | 1982-11-17 | Outer surface cleaning device of nuclear fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57200273A JPS5991399A (en) | 1982-11-17 | 1982-11-17 | Outer surface cleaning device of nuclear fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5991399A true JPS5991399A (en) | 1984-05-26 |
| JPS6346398B2 JPS6346398B2 (en) | 1988-09-14 |
Family
ID=16421577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57200273A Granted JPS5991399A (en) | 1982-11-17 | 1982-11-17 | Outer surface cleaning device of nuclear fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5991399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000072328A1 (en) * | 1999-05-21 | 2000-11-30 | Framatome Anf Gmbh | Device for purifying and/or decontaminating fuel elements |
-
1982
- 1982-11-17 JP JP57200273A patent/JPS5991399A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000072328A1 (en) * | 1999-05-21 | 2000-11-30 | Framatome Anf Gmbh | Device for purifying and/or decontaminating fuel elements |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6346398B2 (en) | 1988-09-14 |
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