JPS60214295A - Measuring device for nuclear reactor - Google Patents
Measuring device for nuclear reactorInfo
- Publication number
- JPS60214295A JPS60214295A JP59072191A JP7219184A JPS60214295A JP S60214295 A JPS60214295 A JP S60214295A JP 59072191 A JP59072191 A JP 59072191A JP 7219184 A JP7219184 A JP 7219184A JP S60214295 A JPS60214295 A JP S60214295A
- Authority
- JP
- Japan
- Prior art keywords
- nuclear reactor
- measuring device
- signal cable
- ionization chamber
- reactor measuring
- 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
Landscapes
- Inorganic Insulating Materials (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Measurement Of Radiation (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
【発明の詳細な説明】
(発明の技術分野)
本発明は電気的絶縁をなす電気絶縁用絶縁体に改良を施
した原子炉用計測装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a nuclear reactor measuring device in which an electrically insulating insulator for electrical insulation is improved.
[発明の技術的背景]
例えば原子力発電所、再処理施設あるいは放射線照射施
設等の放射線利用施設において直接放射線レベル等を計
測する中性子検出器、γ線検出器およびこれらの検出器
からの検出信号を伝送する信号ケーブルには耐放射線特
性が要求されている。[Technical Background of the Invention] For example, neutron detectors, gamma ray detectors, and detection signals from these detectors that directly measure radiation levels, etc. in radiation utilization facilities such as nuclear power plants, reprocessing facilities, or radiation irradiation facilities are used. Transmission signal cables are required to have radiation resistance characteristics.
上記各検出器の内特に炉内中性子検出器あるいは熱電対
等は最も苛酷な使用条件下におかれ、その為これらの検
出器には耐放射線性能をもたせるための積極の対策が施
されており、炉内で長期間安定した動作をなしくqるよ
うに構成されている。Of the above-mentioned detectors, in-reactor neutron detectors and thermocouples in particular are used under the most severe conditions, and therefore active measures are taken to make these detectors radiation-resistant. It is constructed so that it does not operate stably for a long period of time in the furnace.
以下第1図を参照して炉内中性子検出器を例にとって説
明する。第1図は炉内中性子検出器の一部を示す縦断面
図であり、図中符号上は電離箱部を示し、また符号−?
−は信号ケーブル部を示す。上記電離箱8IILは、電
離箱ケース3と、この電離箱ケース3内に間隔を有して
配置された陽極4と、上記電離箱ケース3の内周面に取
り付けられた陰極5とから構成されている。上記電離箱
ケース3゛は耐熱性、耐触性および耐放射性を備えた金
属例えばオーステナイト系ステンレス鋼より構成されて
いる。上記陽極4はその両端を陽極支持部材7Aおよび
7Bを介して上記電離箱ケース3に支持されている。こ
の陽極支持部材7Aおよび7Bはセラミックスにより構
成されており上記陽極4を支持しているのみならず電気
的絶縁をもなしでいる。また上記セラミックスとしては
例えばアルミナ(八β203)、マグネシア(Mill
O) 、シリカ(SiO2)等である。また上記電離
箱ケース3内には不活性ガスが充填されており、絶縁シ
ール11Aによってシールされている。この絶縁シール
11Aも前記支持部材7Aおよび7B同様セラミツクス
より構成されている。一方前記信号ケーブル部、?−は
上記電離箱ケース3に接続された信号ケーブル被覆8と
この信号ケーブル被覆8内に収容され上記陽極4に接続
された信号ケーブル芯線9とから構成されており、この
信号ケーブル芯線9と信号ケーブル被覆8との間には絶
縁体10が充填されているとともにこの絶縁体10と前
記電離箱部上側との間には絶縁シール11Bが取り付け
られている。この絶縁シール11Bにより絶縁体10内
への湿気の流入を防止する構成である。Hereinafter, an in-core neutron detector will be explained as an example with reference to FIG. FIG. 1 is a longitudinal cross-sectional view showing a part of the in-core neutron detector, and the upper part of the figure indicates the ionization chamber, and the upper part of the figure shows the ionization chamber part, and the symbol -?
- indicates the signal cable section. The ionization chamber 8IIL is composed of an ionization chamber case 3, an anode 4 arranged at a distance within the ionization chamber case 3, and a cathode 5 attached to the inner peripheral surface of the ionization chamber case 3. ing. The ionization chamber case 3' is made of a metal having heat resistance, contact resistance, and radiation resistance, such as austenitic stainless steel. The anode 4 is supported at both ends by the ionization chamber case 3 via anode support members 7A and 7B. The anode support members 7A and 7B are made of ceramic and not only support the anode 4 but also provide electrical insulation. Examples of the above-mentioned ceramics include alumina (8β203), magnesia (Mill
O), silica (SiO2), etc. Further, the ionization chamber case 3 is filled with inert gas and sealed with an insulating seal 11A. This insulating seal 11A is also made of ceramics like the supporting members 7A and 7B. On the other hand, the signal cable section? - consists of a signal cable sheath 8 connected to the ion chamber case 3 and a signal cable core 9 housed in the signal cable sheath 8 and connected to the anode 4; An insulator 10 is filled between the cable sheath 8 and an insulating seal 11B between the insulator 10 and the upper side of the ionization chamber. This insulating seal 11B is configured to prevent moisture from entering into the insulator 10.
これら絶縁体10および絶縁シール11Bも前記陽極支
持部U7Aおよび7Bと同様セラミックスより構成され
ている。上記セラミックスは原子炉内における長期間の
使用に対しても十分その性能を保持することが可能であ
り、よって炉内中性子検出器は原子炉内において長期間
信頼性の高い検出を行なうことができる。These insulators 10 and insulating seals 11B are also made of ceramics, similar to the anode support parts U7A and 7B. The above-mentioned ceramics can sufficiently maintain their performance even when used in a nuclear reactor for a long period of time, so the in-reactor neutron detector can perform highly reliable detection for a long period of time inside a nuclear reactor. .
[背景技術の問題点]
上記構成において一般に炉内では中性子照射による体積
膨張現象があり、上述したセラミックスはこの点で問題
があり、よってセラミックスより構成された11極支持
部材7Aおよび7B、絶縁体10および絶縁シール11
A、11Bは、永年使用により体積が膨張してその性能
を喪失する恐れがあり特に絶縁シール11Aおよび11
Bが膨張すると亀裂が発生し、その結果充填されている
不活性ガスが流出したりあるいは絶縁体10内に湿気が
流入して検出が不能となってしまうという不具合があっ
た。[Problems with the Background Art] In the above configuration, there is generally a volumetric expansion phenomenon due to neutron irradiation in the furnace, and the above-mentioned ceramics have a problem in this respect. 10 and insulation seal 11
Insulating seals 11A and 11B may expand in volume and lose their performance after long-term use, especially insulating seals 11A and
When B expands, cracks occur, and as a result, the filled inert gas flows out or moisture flows into the insulator 10, making detection impossible.
(発明の目的)
本発明は以上の点に基づいてなされたものでその目的と
するところは、長期間にわたる中性子照射に対してもそ
の健全性を維持することができる電気絶縁用絶縁体を備
えた原子炉用計測装置を提供することにある。(Object of the Invention) The present invention has been made based on the above points, and its purpose is to provide an electrically insulating insulator that can maintain its integrity even under long-term neutron irradiation. The object of the present invention is to provide a nuclear reactor measurement device that has improved performance.
ずなわら本発明による原子炉用計測装置は、原子炉にお
いて各種計測を行なう原子炉用計測装置において、電気
的絶縁をなす電気絶縁用絶縁体をスピネル型セラミック
スにより構成したことを特徴とするものである。The nuclear reactor measuring device according to the present invention is a nuclear reactor measuring device that performs various measurements in a nuclear reactor, and is characterized in that an electrically insulating insulator for electrical insulation is made of spinel ceramics. It is.
以下第2図および第3図を参照して本発明の一実施例を
説明する。なお従来と同一部分には同一符号を付して示
し、その説明は省略した。本実施例による陽極支持部材
107Aおよび107B、絶縁体110および絶縁シー
ル111A、111Bは、スピネル型セラミックス例え
ばMQAr1204により構成されている。このMCI
Al2204の特性を従来のアルミナおよびマグネシ
アとの比較で次の表1に示す。An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. Note that the same parts as in the prior art are designated by the same reference numerals, and their explanations are omitted. The anode support members 107A and 107B, the insulator 110, and the insulating seals 111A and 111B according to this embodiment are made of spinel type ceramics, such as MQAr1204. This MCI
The properties of Al2204 are shown in Table 1 below in comparison with conventional alumina and magnesia.
表1
この表1で示すようにMill Aff204はアルミ
ナおよびマグネシアと同様中性子検出器絶縁体として優
れた特性を備えている。次にMgAu204の中性子照
射による体積膨張についてみてみると、第3図に示すよ
うにアルミナ等に比べて極めて低いことがわかる。なお
第3図は横軸に中性子照射量をとり、縦軸に体積膨張率
をとって、1100K[(1100−273)’C]、
1015K[(1015−273>’CIおよび925
K[(925−273)°C]におけるアルミナ、MU
Aj2204の体積膨張率変化を示した図であり、ア
ルミナの場合を破線で、MgAu204の場合を実線で
示しいる。また1100にの場合を口中で、1015に
の場合をO印で、925にの場合をΔ印で夫々示しであ
る。すなわちアルミナの場合には中性子照射量の増加に
伴ない体積膨張率は増大していき、また温度が高ければ
高い程その傾向は顕著である。これに対して MgAu
204は、中性予熱11m1tの増加および温度の上昇
に関係なく体積膨張率は略零であり、殆膨張しないこと
がわかる。このように中性子の照射により体積が殆膨張
しないMgAl2204により支持部材107A、10
7B、絶縁シール111A、111B、絶縁体110を
構成しているので、原子炉内において長期間使用しても
構造上の変化はなく、絶縁性の維持、機械的な損傷の防
止等その性能を確実に維持することができ、信頼性の高
い炉内中性子検出器を提供することができる。特に絶縁
シール111Aおよび111BをMgAl2204で構
成したことにより従来懸念されていた亀裂の発生を確実
に防止することが可能となり、よって充填されている不
活性ガスの流出および絶縁体110内への湿気の流入と
いった事態を防ぐことができ検出器の健全性を確実に維
持することが可能となる。Table 1 As shown in Table 1, Mill Aff204, like alumina and magnesia, has excellent properties as a neutron detector insulator. Next, when we look at the volumetric expansion of MgAu204 due to neutron irradiation, we find that it is extremely low compared to alumina and the like, as shown in FIG. In addition, in Figure 3, the horizontal axis shows the neutron irradiation amount and the vertical axis shows the volumetric expansion coefficient, 1100K [(1100-273)'C],
1015K [(1015-273>'CI and 925
Alumina at K [(925-273) °C], MU
It is a diagram showing changes in the volumetric expansion coefficient of Aj2204, where the case of alumina is shown by a broken line and the case of MgAu204 is shown by a solid line. Further, the case of 1100 is shown in the mouth, the case of 1015 is shown by O mark, and the case of 925 is shown by Δ mark. That is, in the case of alumina, the coefficient of volumetric expansion increases as the amount of neutron irradiation increases, and this tendency becomes more pronounced as the temperature increases. On the other hand, MgAu
It can be seen that the volumetric expansion coefficient of No. 204 is approximately zero regardless of the increase in the neutral preheating 11mlt and the temperature rise, indicating that it hardly expands. In this way, the supporting members 107A and 10 are made of MgAl2204, which hardly expands in volume when irradiated with neutrons.
7B, insulating seals 111A, 111B, and insulator 110, there will be no structural change even if it is used in a nuclear reactor for a long time, and its performance such as maintaining insulation and preventing mechanical damage will be maintained. It is possible to provide an in-core neutron detector that can be maintained reliably and is highly reliable. In particular, by configuring the insulating seals 111A and 111B with MgAl2204, it is possible to reliably prevent the occurrence of cracks, which had been a concern in the past. Situations such as inflow can be prevented and the integrity of the detector can be reliably maintained.
なお前記実施例では炉内中性子検出器に適用した場合に
ついて説明したが、これに限ったことではなく、γ線検
出器、β線検出器、α線検出器等各種放射線検出器に適
用しても同様の効果を奏することができる。又1i11
11箱形の場合のみならず比例計数管式、ガイガ、ミュ
ーラ管式、半導体式の場合にも適用可能である。さらに
放射線検出器以外にも温度計測用の熱雷対あるいは流速
検出用渦電流形検出器に適用しても同様の効果を奏する
ことができる。In the above embodiment, the case where the present invention is applied to an in-reactor neutron detector has been described, but the present invention is not limited to this, and can be applied to various radiation detectors such as a gamma ray detector, a beta ray detector, an alpha ray detector, etc. can also produce the same effect. Mata1i11
It is applicable not only to the 11-box type but also to the proportional counter type, Geiga tube type, Muller tube type, and semiconductor type. Furthermore, in addition to radiation detectors, the same effect can be achieved even when applied to thermal lightning pairs for temperature measurement or eddy current detectors for detecting flow velocity.
以上詳述したように本発明による原子炉用計測装置は、
原子炉において各種計測を行なう原子炉用計測装置にお
いて、電気的絶縁をなす電気絶縁用絶縁体をスピネル型
セラミックスにより構成したとを特徴するものである。As detailed above, the nuclear reactor measurement device according to the present invention has the following features:
A nuclear reactor measuring device for performing various measurements in a nuclear reactor is characterized in that an electrically insulating insulator for electrical insulation is made of spinel type ceramics.
したがって長期間にわたる中性子照射に対しもその性能
を確実に維持することができ、信頼性の高い原子炉用計
測装置を提供することが可能となる。Therefore, it is possible to reliably maintain its performance even during long-term neutron irradiation, and it is possible to provide a highly reliable nuclear reactor measurement device.
第1図は従来例を示す炉内中性子検出器の一部面図、第
3図はアルミナとM!J Al2O2との体積膨張率を
比較して示す線図である。
1−・・電m箱部1.?−・・・信号ケーブル部、3・
・・電離箱ケース、4・・・陽極、5・・・陰極、10
7A、107B・・・1ilII支持部材、8・・・信
号ケーブル被覆、9・・・信号ケーブル芯線、110・
・・絶縁体、111A。
111B・・・絶縁シール。
出願人代理人 弁理士 鈴江武彦
第1図 第2154Fig. 1 is a partial side view of a conventional in-core neutron detector, and Fig. 3 shows alumina and M! It is a diagram showing a comparison of the volumetric expansion coefficient with J Al2O2. 1-... Electric box part 1. ? -...Signal cable section, 3.
...Ionization chamber case, 4...Anode, 5...Cathode, 10
7A, 107B...1ilII support member, 8...Signal cable covering, 9...Signal cable core wire, 110.
...Insulator, 111A. 111B...Insulating seal. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2154
Claims (5)
置において、電気的絶縁をなす電気絶縁用絶縁体をスピ
ネル型セラミックスにより構成したことを特徴とする原
子炉用計測装置。(1) A nuclear reactor measuring device for performing various measurements in a nuclear reactor, characterized in that an electrically insulating insulator for electrical insulation is made of spinel type ceramics.
周面に陰極を有する電離箱ケースとこの電離箱ケース内
に間隔を有して収容された陽極との間をスピネル型セラ
ミックスよりなる支持部材により絶縁しかつ支持したこ
とを特徴とする特許請求の範囲第1項記載の原子炉用計
測装置。(2) The above nuclear reactor measurement device is a neutron detector, and a spinel type ceramic is used to connect the ionization chamber case with a cathode on the inner peripheral surface and the anode housed at a distance within the ionization chamber case. 2. The nuclear reactor measuring device according to claim 1, wherein the measuring device is insulated and supported by a supporting member.
ブルとこの信号ケーブルの外周に電離箱ケースに接続さ
れて設けられた信号ケーブル被覆を有しており、これら
信号ケーブルおよび信号ケーブル被覆との間をスピネル
型セラミックスよりなる絶縁材により絶縁したことを特
徴とする特許請求の範囲第2項記載の原子炉用計測装置
。(3) The above-mentioned neutron detector has a signal cable connected to the anode and a signal cable sheathing connected to the ionization box case on the outer periphery of the signal cable. 3. The nuclear reactor measuring device according to claim 2, wherein the space between the two is insulated by an insulating material made of spinel type ceramics.
ることを特徴する特許請求の範囲第1項記載の原子炉用
計測装置。(4) The nuclear reactor measuring device according to claim 1, wherein the nuclear reactor measuring device is a thermal lightning pair for temperature measurement.
出器であることを特徴とする特許請求の範囲第1項記載
の原子炉用計測装置。(5) The nuclear reactor measuring device according to claim 1, wherein the nuclear reactor measuring device is an eddy current detector for detecting flow velocity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59072191A JPS60214295A (en) | 1984-04-11 | 1984-04-11 | Measuring device for nuclear reactor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59072191A JPS60214295A (en) | 1984-04-11 | 1984-04-11 | Measuring device for nuclear reactor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60214295A true JPS60214295A (en) | 1985-10-26 |
JPH0477874B2 JPH0477874B2 (en) | 1992-12-09 |
Family
ID=13482072
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59072191A Granted JPS60214295A (en) | 1984-04-11 | 1984-04-11 | Measuring device for nuclear reactor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60214295A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993005520A1 (en) * | 1991-09-09 | 1993-03-18 | American Technology, Inc. | Spinel insulated electrical components and method for making same |
JP2011117900A (en) * | 2009-12-07 | 2011-06-16 | Mitsubishi Electric Corp | Structure of neutron detector |
-
1984
- 1984-04-11 JP JP59072191A patent/JPS60214295A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993005520A1 (en) * | 1991-09-09 | 1993-03-18 | American Technology, Inc. | Spinel insulated electrical components and method for making same |
JP2011117900A (en) * | 2009-12-07 | 2011-06-16 | Mitsubishi Electric Corp | Structure of neutron detector |
Also Published As
Publication number | Publication date |
---|---|
JPH0477874B2 (en) | 1992-12-09 |
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