JPS6060527A - Piping structural body for sodium leakage detector - Google Patents

Piping structural body for sodium leakage detector

Info

Publication number
JPS6060527A
JPS6060527A JP58168931A JP16893183A JPS6060527A JP S6060527 A JPS6060527 A JP S6060527A JP 58168931 A JP58168931 A JP 58168931A JP 16893183 A JP16893183 A JP 16893183A JP S6060527 A JPS6060527 A JP S6060527A
Authority
JP
Japan
Prior art keywords
piping
sodium
pipe
nozzle
annulus
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
Application number
JP58168931A
Other languages
Japanese (ja)
Inventor
Etsuko Yoshida
吉田　悦子
Ryoichi Otani
大谷　良一
Iwao Oshima
大島　巌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Nippon Genshiryoku Jigyo KK
Nippon Atomic Industry Group Co Ltd
Original Assignee
Toshiba Corp
Nippon Genshiryoku Jigyo KK
Nippon Atomic Industry Group Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Nippon Genshiryoku Jigyo KK, Nippon Atomic Industry Group Co Ltd filed Critical Toshiba Corp
Priority to JP58168931A priority Critical patent/JPS6060527A/en
Publication of JPS6060527A publication Critical patent/JPS6060527A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
    • G01M3/226—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators
    • G01M3/228—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for containers, e.g. radiators for radiators

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To eliminate an unevenness of a sodium detecting function and to improve the function by connecting a nozzle tube having plural holes at a tip end of a sampling piping and holding the nozzle tube between flange structural parts of an interior plate. CONSTITUTION:An outside of a piping 1 for sodium current is surrounded by an interior plate 3 having a flange structural part 33, and the outside thereof is covered with heat insulator. An annulus part 6 is formed between the piping 1 and the plate 3. A nozzle 31 having plural holes 30 is connected to the sampling piping 29, and the nozzle 31 is held between a pair of the flange structural parts 33 and fixed by a screw 34. In this way, the sampling can be performed uniformly also from the places distant from the nozzle 31, and the function of the whole leakage detecting system is improved.

Description

【発明の詳細な説明】 ［発明の技術分野］ 本発明はたとえば高速増殖炉に使用されるす１−リウム
冷却系配管からの微少量のナトリウム漏洩を検出するた
めのガスサンプリング方式によるナトリウム漏洩検出器
の一部を構成する漏洩検出器用サンプリング配管構造に
関する。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method for detecting sodium leakage using a gas sampling method for detecting a minute amount of sodium leakage from a sodium-lium cooling system piping used in a fast breeder reactor, for example. The present invention relates to a sampling piping structure for a leak detector that constitutes a part of a leak detector.

［発明の技術的背景］ 液体ナトリウムを冷却材として用いる高速増殖炉におい
ては、ナトリウムを収納している機器または配管に生じ
た亀裂からの漏洩ナトリムを初期の微少量漏洩の段階で
検出することは非常に重要である。リ−なわち、漏洩ナ
トリウムは機器または配管が設置されている外部雰囲気
中の酸素または水分と反応し、酸化ナトリウムや水酸化
ナトリウムのような腐食性化合物を生成する。このため
、腐蝕による亀裂の拡大があり、大規模なす１ヘリウム
漏洩を引き起す恐れがある。したがって、初期の微少量
漏洩の段階で確実に検出することが必要である。[Technical Background of the Invention] In fast breeder reactors that use liquid sodium as a coolant, it is difficult to detect sodium leakage from cracks that occur in equipment or piping containing sodium at the initial stage of minute leakage. Very important. That is, leaked sodium reacts with oxygen or moisture in the external atmosphere in which the equipment or piping is installed, producing corrosive compounds such as sodium oxide and sodium hydroxide. As a result, cracks may expand due to corrosion, which may lead to large-scale helium leakage. Therefore, it is necessary to reliably detect a small amount of leakage at the initial stage.

従来、ナ１〜リウムの漏洩を検出ザる方法としては、た
とえば、機器の底部などに漏洩す１〜リウムが溜まる場
所をつくっておき漏洩す１〜リウムにＪ：って電極を短
絡さぜることによりす１〜リウムの存在を検出したり、
また、平行な電線を管壁に沿って絶縁してはわせておき
漏洩す１ヘリウムにより短絡させることにより、検出し
たり覆る接触５１遍検出方法が知られている。この検出
方法は、中漏洩や大漏洩に適したもので、微少漏洩の検
出には適していない。Conventionally, a method for detecting leakage of sodium is to create a place at the bottom of the device where the leaking sodium accumulates, and then short-circuit an electrode to the leaking sodium. By doing so, the presence of 1~rium can be detected,
Furthermore, a contact detection method is known in which parallel electric wires are insulated and placed along the tube wall and then short-circuited by leaking helium to detect or cover the wires. This detection method is suitable for medium or large leaks, and is not suitable for detecting minute leaks.

一方、微少量漏洩検出方法としては、ガス１ノンプリン
グ法が知られている。ガスリーンプリング法とは、漏洩
検出の対象となる１幾器または配管類からナトリウムが
漏洩した場合、漏洩ナトリウムから発生ずるす１〜リウ
ムエアロゾルを、機器または配管類周辺の雰囲気ガスと
一緒に、サンプリングして検出器に導き、ナトリウム漏
洩を検出Ｊ−る方法である。On the other hand, a gas 1 non-pull method is known as a method for detecting a small amount of leakage. The gas lean pulling method is a method in which when sodium leaks from equipment or piping that is subject to leak detection, the aerosol generated from the leaked sodium is sampled together with the atmospheric gas around the equipment or piping. This is a method to detect sodium leakage by guiding the sodium to a detector.

以下、従来のガスリーンブリング法を第１図Ｊ＞よび第
２図ににって説明１．る。第１図に承りようにナトリウ
ム用冷却系配管１に生じた亀裂４がらナトリウムの微少
漏洩が起こると、漏洩すトリウムは冷却系配管１の表面
と内装板３との間に図に明記してないスペーサバンドに
より形成されたアニユラス部６内の雰囲気ガスと接し、
ガス中の酸素や水分と反応し、酸化す１〜リウム、水酸
化す１〜リウムなとのすｉ〜リウムエアロゾル５を発生
ずる。The conventional gas lean-bring method will be explained below with reference to Fig. 1 and Fig. 2. Ru. As shown in Fig. 1, when a small amount of sodium leaks through the crack 4 that occurs in the sodium cooling system piping 1, the leaked thorium is clearly shown in the figure between the surface of the cooling system piping 1 and the interior plate 3. In contact with the atmospheric gas in the annulus portion 6 formed by the spacer band,
It reacts with oxygen and moisture in the gas, and generates monolithium oxide, monolithium hydroxide, and monolithium aerosol 5.

このナトリウムエアロゾルは保温材２を貫通し、内装板
３に取りつけられた、サンプリング配管７によりアニユ
ラス部６内ガスと一緒にす］〜リウム漏洩検出ユニット
１０内に送り込まれる。この検出ユニット１０でブー　
１−リウムの漏洩用が測定される。This sodium aerosol passes through the heat insulating material 2 and is sent into the lithium leak detection unit 10 together with the gas inside the annulus section 6 by a sampling pipe 7 attached to the interior panel 3. With this detection unit 10,
The leakage of 1-lium is measured.

そして、検出ユニツ）へ１０からの信号は格納容器１１
の外部に配置されたす１〜リウム漏洩監祝盤１２に送ら
れ、中央制御室の警報表示器１３に表示される。Then, the signal from 10 to the detection unit is sent to the containment vessel 11.
The leakage information is sent to the leakage monitoring board 12 located outside the main control room, and displayed on the alarm display 13 in the central control room.

検出ユニツ１〜１０の内部は第２図に系統線図的に示し
たように構成されている。すなわち、上矢印方向からサ
ンプリングガスが送り込まれるサンプル入口１４にバル
ブ１７が接続され、このバルブ１７の出口配管１４ａの
側面にテス［へ用人口１５が接続されている。サンプル
入口１４の出（」配管１４　’ａの端末は三方の配管２
４．２５に分岐され、一方の配管２４には放射性イオン
化検出器（以下、ＲＩＤと称す）１８゜コ　フィルター
１９および定流量弁２０が順次接続されている。また、
他方の配管２５には弁、フィルタ１９ａおよび定流ｍ弁
２０ａが接続されている。これらの配管２４．２！ｉの
端末にはそれぞれ弁が接続され共通配管２Ｇで合流して
いる。また、共通配管２６にはサンプリング用のポンプ
２２．圧力指示スイッチ２１および流調弁２３が接続さ
れてＪ３す、流調弁２３はリーンプル出口１Ｇに弁を介
して接続されている。The inside of the detection units 1 to 10 is constructed as shown in a system diagram in FIG. That is, a valve 17 is connected to the sample inlet 14 into which the sampling gas is fed from the direction of the upward arrow, and a valve 15 is connected to the side surface of the outlet pipe 14a of the valve 17. The outlet of the sample inlet 14 (the end of the pipe 14'a is connected to the pipe 2 on three sides)
4.25, and a radioactive ionization detector (hereinafter referred to as RID) 18° filter 19 and a constant flow valve 20 are sequentially connected to one pipe 24. Also,
A valve, a filter 19a, and a constant flow m-valve 20a are connected to the other pipe 25. These piping 24.2! A valve is connected to each terminal of i, and they join together in a common pipe 2G. The common pipe 26 also includes a sampling pump 22. The pressure indicating switch 21 and the flow control valve 23 are connected to J3, and the flow control valve 23 is connected to the lean pull outlet 1G via a valve.

しかしながら、このような従来の方法を用いた場合、保
温構造部には、第３図に示Ｊように予熱ヒータ３５の引
出部の貫通部３２および第４図に示づように内装板３の
フランジ構造部３３などの−すきまがあり、これらづき
まから、アニユラス部６へ外部雰囲気からガスが流入し
、漏洩プトリウムから発生したエアロゾル５の濃度を希
釈する。さらに従来は、第３図に示１ように、」ノーン
プリング配管７を保温材を貫通し、内装板３に取りつり
でいるため、これらサンプリング配管７からアニユラス
部６内ガスをサンプリングした場合、す゛ンプリング配
管取り付は部から離れるほど、流速がＨくなる。また、
アニユラス内の流速分布はヒータ貫通部３２および内装
板３のフランジ４ｊ４造部３３のずきまの寸法によって
も大きく変化し、流速ゼロの場合もできる。漏洩す］〜
リウムから発生づるす１〜リウムエアロゾル５は、サン
プリング゛グされるアニユラス内ガスによって輸送され
るため、流速分布が一様でない場合、漏洩位置により検
出性能が異なってくる。However, when such a conventional method is used, the heat insulation structure includes the penetration part 32 of the drawer part of the preheater 35 as shown in FIG. 3 and the inner panel 3 as shown in FIG. There are gaps in the flange structure 33, etc., and gas flows into the annulus 6 from the outside atmosphere through these gaps, diluting the concentration of the aerosol 5 generated from the leaked putrium. Furthermore, conventionally, as shown in FIG. 3, the non-pull piping 7 is passed through the heat insulating material and attached to the interior panel 3, so when the gas inside the annulus section 6 is sampled from the sampling piping 7, The further away from the sampling piping installation, the higher the flow velocity becomes. Also,
The flow velocity distribution within the annulus varies greatly depending on the dimensions of the gap between the heater penetration portion 32 and the flange 4j4 portion 33 of the interior plate 3, and the flow velocity may be zero. Leak] ~
Since the lithium aerosols 1 to 5 generated from lithium are transported by the sampled gas within the annulus, if the flow velocity distribution is not uniform, the detection performance will vary depending on the leak position.

［発明の目的］ 本発明は上記の技術解決の要求に応えるために行ったも
のであり、アニユラス部の流速分布としてより一様な安
定した流速分布を与え、その結果、漏洩場所による検出
性能のむらをなくし、より性能の高いガス（ノンプリン
グ式す１ヘリウム漏洩検出器用配管構造体を提供づるこ
とにある。[Purpose of the Invention] The present invention was made in response to the above-mentioned demand for technical solutions, and provides a more uniform and stable flow velocity distribution in the annulus, thereby reducing unevenness in detection performance depending on the location of the leak. The purpose of this invention is to provide a piping structure for a gas (non-pull type) helium leak detector with higher performance.

［発明の概要］ 本発明はナトリウム通流用配管と、この配管の外側を包
囲した一対のフランジ構造部を有する内装板と、この内
装板の外側面に設けられた断熱拐で形成した保温構造部
と、前記す１ヘリウム通流用配壱・と前記内装板との間
に形成さ−れるアニユラス部と、このアニユラス部内の
ガスをサンプリングするための前記断熱拐を貫通して前
記アニユラス部内に位置したノズル管を有する１ノーン
プリング配管と、前記ノズル管に設りられだ複数の穴と
を具備してなり、前記ノズル管は前記一対のフランジ構
造部に挟持されていることを！ｌ）徴どりるす１−リウ
ム漏洩検出器用配管構造体である。[Summary of the Invention] The present invention provides a sodium flow pipe, an interior plate having a pair of flange structures surrounding the outside of the pipe, and a heat insulation structure formed by a heat insulating groove provided on the outer surface of the interior plate. and an annulus formed between the first helium flow distribution part and the interior plate, and an annulus located within the annulus passing through the heat insulating hole for sampling gas within the annulus. It comprises one non-pull piping having a nozzle pipe and a plurality of holes provided in the nozzle pipe, and the nozzle pipe is sandwiched between the pair of flange structures! l) A piping structure for a lium leak detector.

［発明の実施例］ 以下、本発明に係るブーｈリウム鋪洩検出器用配管構造
体の一実施例を第５図から第７図を参照しながら説明す
る。[Embodiments of the Invention] Hereinafter, an embodiment of a piping structure for a boolean leakage detector according to the present invention will be described with reference to FIGS. 5 to 7.

第５図においてナトリウム通流用配管１の外側を一対の
フランジ構造部３３を有する内装板３で包囲し、またそ
の内装板３の外側をイ′１．温月２で覆って保湿構造部
を形成する。そして、前記配管１と前記内装板３との間
アニユラス部６を形成するとともに、このアニユラス部
６内のガスをリーンプリングするために前記保温材を貫
通し複数の穴３０を有するノズル３１をサンプリング配
管２９に接続し、このノズル３１を内装板３に形成した
一対のフランジ構造部３３に挟み込んでビス３４で固定
する。また内装板３の下面に予熱ヒータ３５を埋設する
。しかして、上記実施例では前記サンプリング配管２９
に接続した穴３０を有するノズｌし３１を内装板３のフ
ランジ構造部３３にはさみこんだため、サンプリング配
管２９により、アニユラス部６のスペースを小さくする
ことがない。ここでアニユラス部６とは、サンプリング
するガス空間を保持するとともに予熱ヒータ２８による
配管１の予熱のために確保された空間である。In FIG. 5, the outside of the sodium flow pipe 1 is surrounded by an interior plate 3 having a pair of flange structures 33, and the outside of the interior plate 3 is surrounded by a'1. A moisturizing structure is formed by covering with Ontsuki 2. Then, an annulus portion 6 is formed between the piping 1 and the interior panel 3, and a nozzle 31 having a plurality of holes 30 that penetrates the heat insulating material is sampled in order to perform lean pulling of the gas in the annulus portion 6. The nozzle 31 is connected to the piping 29, sandwiched between a pair of flange structures 33 formed on the interior panel 3, and fixed with screws 34. Further, a preheater 35 is embedded in the lower surface of the interior panel 3. However, in the above embodiment, the sampling pipe 29
Since the nozzle 31 having the hole 30 connected to the flange structure 33 of the interior panel 3 is inserted into the flange structure 33 of the interior panel 3, the space of the annulus 6 is not reduced by the sampling pipe 29. Here, the annulus section 6 is a space secured for holding a gas space to be sampled and for preheating the pipe 1 by the preheater 28.

内装板３のフランジ構造部３３に挟み込んだサンプリン
グ配管２９は第６図に示したような構造になっている。The sampling pipe 29 sandwiched between the flange structure portion 33 of the interior panel 3 has a structure as shown in FIG.

すなわちサンプリング配管２９のノズル３１にあける複
数の穴３０が一様の場合、各穴３０から一定の流速でサ
ンプリングできるが、さらに、先端部にいくほど第６図
に示すように、穴の径を大きクシ＝（いくど、より大き
な流量で１）−ンブリングできる。In other words, if the plurality of holes 30 made in the nozzle 31 of the sampling pipe 29 are uniform, sampling can be performed from each hole 30 at a constant flow rate, but as shown in FIG. Large comb = (1) can be combined with a larger flow rate.

本発明により、アニユラス部の機能をそこなうことなく
、漏洩検出システムの性能を上げることができる。According to the present invention, the performance of the leakage detection system can be improved without impairing the function of the annulus section.

次に、本発明に係るナトリウム１１ｉｉ洩検出器用配管
構造体の作用を説明する。第８図に１、リンプリング流
量、サンプリング配管内径、リンプリング配管２９のノ
ズル３１にあけた穴３０の径を一定とし、アニユラス部
に挿入するサンプリング配管の長さしと穴の数をパラメ
ータとして、す＝ンブリング配管内の平均流速と最小流
速の比、流ω比をめたものである。流ｍ比が１，０に近
い稈、最小流速が平均流速に近いことを意味し、より一
様な流速分布となっている。第８図に示したδ１算結果
より、前記パラメータを調整することにより、リーンプ
リング配管の挿入部のノス゛ル３１にあけた穴からｂ１
挿入部入口近くの穴と同様の流量で、アニユラス部内ガ
スをり゛ンプリングできることがわかる。Next, the operation of the piping structure for a sodium 11ii leak detector according to the present invention will be explained. Figure 8 shows 1. The limp ring flow rate, the internal diameter of the sampling pipe, and the diameter of the hole 30 made in the nozzle 31 of the limp ring pipe 29 are constant, and the length of the sampling pipe inserted into the annulus and the number of holes are set as parameters. , the ratio of the average flow velocity to the minimum flow velocity in the summing pipe, and the flow ω ratio. A culm with a flow m ratio close to 1.0 means that the minimum flow velocity is close to the average flow velocity, resulting in a more uniform flow velocity distribution. From the δ1 calculation result shown in FIG. 8, by adjusting the above parameters, b1
It can be seen that the gas inside the annulus can be sampled at the same flow rate as the hole near the entrance of the insertion section.

上記、穴のあいたサンプリング配管をアニユラス部に挿
入することにより、１ノンプリングノズルから離れた場
所からも、一様にサンプリングできる。このためアニユ
ラス部６内での流速ケ口の場所を除去することかでき、
またサンプリングノズル３１から離れた場所も一様にリ
ーンプリングでき、もって漏洩検出システム全体の性能
を向上さけることができる。By inserting the above-mentioned sampling pipe with a hole into the annulus part, uniform sampling can be performed even from a location away from the non-pull nozzle. Therefore, the location of the flow outlet in the annulus portion 6 can be removed,
In addition, lean pulling can be performed uniformly even in locations away from the sampling nozzle 31, thereby improving the performance of the entire leakage detection system.

［発明の効果］ 以上説明したように、本発明に係るナトリウム漏洩検出
器用配管構造体は、サンプリング配管の先端に複数の穴
を有するノズル管を接続し、かつ穴を有するノズル管を
内装板のフランジ構造部にはさみこむように挟持してな
るものであるため、アニユラス部の機能を損なうことな
く、アニユラス部内ガスを一様にυンプリングでき冷却
系配管の任意の位置からす１ヘリウムが漏洩しても、一
様に検出することができ、より性能のよいす１〜リウム
漏洩検出器の配管構造体を提供することができる。[Effects of the Invention] As explained above, the piping structure for a sodium leak detector according to the present invention connects the nozzle pipe having a plurality of holes to the tip of the sampling pipe, and connects the nozzle pipe having the holes to the inner plate. Because it is sandwiched between the flange structure, the gas inside the annulus can be uniformly sampled without impairing the function of the annulus, and it is possible to prevent helium from leaking from any location in the cooling system piping. Also, it is possible to provide a piping structure for a leak detector that can uniformly detect leaks and has better performance.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来のガスザンプリング式ナトリウム漏洩検
出システムの構成を示す装置配首図、第２図は第１図に
お【ノるナトリウム漏洩検出ユニツ１〜の内部を示す系
統図、第３図は第１図におりる冷却系配管及び保温構造
体部分を拡大して示す断面図、第４図は第３図にお【プ
る冷却配管用の内装板を拡大しで示す斜視図、第５図は
本発明に係るナトリウム漏洩検出器用配管構造体の一実
施例を一部切欠して断面で示す傾斜図、第６図は第５図
にお（プるノズル管とザンブリング管どの接続状態を示
す平面図、第７図は第６図にお（Ｊる］ノンブリング管
の長さおよび穴の数をパラメータとしたサンプリング管
内の平均流量と最小流量の比を算出して示す曲線図であ
る。 １・・・ナトリウム通流用　２・・・保温材３・・・内
装板　４・・・亀裂 ５・・・ナトリウムエアロゾル ６・・・アニユラス部　７・・・」ノンブリング配管１
０・・・ナトリウム漏洩検出ユニット１４・・・１ノン
ブリング管口　１５・・・デスト用入口１６・・・サン
プリング出口　１７・・・バルブ１８・・・ＲＩＤ　１
９・・・フィルター２０・・・定流量弁　２１・・・圧
力指示スイッチ２２・・・ポンプ　２３・・・流調弁 ２９・・・サンプリング配管　３０・・・穴３１・・・
ノズル　３３・・・フランジ構造部出願代理人　弁理士
　菊　池　五　部 第　３　Ｍ ＋　４　図 卒　５　図 第　θ　図 た双Fig. 1 is a device layout diagram showing the configuration of a conventional gas sampling type sodium leak detection system, and Fig. 2 is a system diagram showing the inside of the sodium leak detection unit 1~ shown in Fig. 1. Figure 3 is an enlarged sectional view of the cooling system piping and heat insulation structure shown in Figure 1, and Figure 4 is an enlarged perspective view of the interior plate for the cooling piping shown in Figure 3. , FIG. 5 is a partially cutaway cross-sectional view of an embodiment of the piping structure for a sodium leak detector according to the present invention, and FIG. A plan view showing the connection state, Figure 7 is shown in Figure 6. (J) A curve showing the calculated ratio of the average flow rate to the minimum flow rate in the sampling pipe using the length of the non-bringing pipe and the number of holes as parameters. It is a diagram. 1... Sodium flow 2... Insulating material 3... Interior plate 4... Crack 5... Sodium aerosol 6... Annulus portion 7..." Non-bringing piping 1
0...Sodium leak detection unit 14...1 Non-bring pipe port 15...Dest inlet 16...Sampling outlet 17...Valve 18...RID 1
9... Filter 20... Constant flow valve 21... Pressure indication switch 22... Pump 23... Flow control valve 29... Sampling piping 30... Hole 31...
Nozzle 33...Flange Structure Department Application Agent Patent Attorney Kikuchi 5th Department 3rd M + 4 Fig. 5 Fig. θ Fig. 2

Claims (2)

【特許請求の範囲】[Claims] （１）　ナトリウム通流用配管と、この配管の外側を包
囲した一対のフランジ構造部を有する内装板と、この内
装板の外側面に設りられたＷ１熱材で形成した保温構造
部と、前記す１ヘリウム通流用配管と前記内装板との間
に形成されるアニユラス部と、このアニユラス部内のガ
スをザンブリングするための前記断熱材を負通しで前記
アニユラス部内に位置したノズル管を有づるサンプリン
グ配管と、前記ノズル管に設（プられた複数の穴とを具
備したナトリウム漏洩検出器用配管構造体において、前
記ノズル管は前記内装板に形成された一対のフランジ構
造部に挟持されていることを特徴とするナトリウム漏洩
検出器用配管構造体。(1) A sodium flow pipe, an interior plate having a pair of flange structures surrounding the outside of this pipe, a heat insulation structure formed of W1 heat material provided on the outer surface of this interior plate, and a front 1. A sampling system having an annulus formed between a helium flow pipe and the interior plate, and a nozzle pipe located in the annulus with a negative passage through the heat insulating material for zumbling gas in the annulus. In the piping structure for a sodium leak detector comprising piping and a plurality of holes provided in the nozzle pipe, the nozzle pipe is sandwiched between a pair of flange structures formed in the interior plate. A piping structure for a sodium leak detector, characterized by: （２）　前記ノズル管に形成した複数の穴は両端部に近
くなるにつれて順次口径が大ぎくなるＪ：うに形成され
ていることを特徴とするＱ’−ｒ　ＦＦ請求の範囲第１
項記載のナトリウム漏洩検出器用配管構造体。(2) A Q'-r FF characterized in that the plurality of holes formed in the nozzle pipe are formed in a J: sea urchin shape in which the apertures become larger in sequence as they get closer to both ends.Claim 1
A piping structure for a sodium leak detector as described in .
JP58168931A 1983-09-13 1983-09-13 Piping structural body for sodium leakage detector Pending JPS6060527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58168931A JPS6060527A (en) 1983-09-13 1983-09-13 Piping structural body for sodium leakage detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58168931A JPS6060527A (en) 1983-09-13 1983-09-13 Piping structural body for sodium leakage detector

Publications (1)

Publication Number Publication Date
JPS6060527A true JPS6060527A (en) 1985-04-08

Family

ID=15877198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58168931A Pending JPS6060527A (en) 1983-09-13 1983-09-13 Piping structural body for sodium leakage detector

Country Status (1)

Country Link
JP (1) JPS6060527A (en)

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