JPS6264976A - Method for measuring withstand voltage of neutron detector - Google Patents
Method for measuring withstand voltage of neutron detectorInfo
- Publication number
- JPS6264976A JPS6264976A JP20480485A JP20480485A JPS6264976A JP S6264976 A JPS6264976 A JP S6264976A JP 20480485 A JP20480485 A JP 20480485A JP 20480485 A JP20480485 A JP 20480485A JP S6264976 A JPS6264976 A JP S6264976A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- discharge
- circuit
- current
- detector
- 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
- Measurement Of Radiation (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
【発明の詳細な説明】 〔発明の技術分野〕 この発明は、中性子検出器の耐電圧測定方法に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a method for measuring withstand voltage of a neutron detector.
〔発明の技術的背景およびその問題点〕例えば沸騰水形
原子炉の中性子検出には、核***形電離箱からなる中性
子検出器を複数個設置し、それらに例えば１０（ｌル）
（Ｖ）の直流電圧を印加し、電離電流を検出して測定
する。[Technical background of the invention and its problems] For example, to detect neutrons in a boiling water reactor, a plurality of neutron detectors each consisting of a fission chamber are installed, and each
(V) is applied, and the ionization current is detected and measured.
このような中性子検出器は、当然高い信頼性が要求され
、とくに検出器自身での異常放電は皆無でなければなら
ない。このため、中性子検出器は、動作電圧である１０
０Ｖに対して十分高い電圧、例えば７００ｖまで異常放
電しないように保証している。中性子検出器の製造にお
いて、この耐電圧特性の測定は、非破壊的に行なうこと
が望ましい。Such a neutron detector is naturally required to have high reliability, and in particular, there must be no abnormal discharge within the detector itself. For this reason, the neutron detector has an operating voltage of 10
It is guaranteed that abnormal discharge will not occur up to a voltage sufficiently high compared to 0V, for example 700V. In manufacturing neutron detectors, it is desirable to measure this withstand voltage characteristic non-destructively.
一方、このような中性子検出器は、内部に絶縁体からな
るスペーサを有し、長尺な同軸状の電極導出端子構造で
あるため、陰極、陽極端子間の静電容量が、およそ２０
００乃至３０００ ｐＦもある。このため、耐電圧測定
の電圧を不用意九印加すると、この静１！容量成分への
充電電流と異常放電電流とを混同しやすく、正確な測定
ができないという不都合がある。On the other hand, such a neutron detector has a spacer made of an insulator inside and has a long coaxial electrode lead-out terminal structure, so the capacitance between the cathode and anode terminals is approximately 20
00 to 3000 pF. For this reason, if you inadvertently apply a voltage for measuring withstand voltage, this static voltage of 1! There is a problem in that it is easy to confuse the charging current to the capacitive component with the abnormal discharge current, making accurate measurement impossible.
この発明は、以上のような不都合を解消し高精度で非破
壊的に耐電圧特性を測定しうる中性子検出器の耐電圧測
定方法を提供するものである。The present invention provides a method for measuring withstand voltage of a neutron detector, which eliminates the above-mentioned inconveniences and enables highly accurate and non-destructive measurement of withstand voltage characteristics.
この発明は、０ゴルトから毎秒１００？ルト以下の割合
で電極導出端子への印加電圧を上昇し、異常放電の発生
による放電電流が所定レベル以上である場合は電圧を低
減し、再度上記割合で電圧上昇し、被破壊的に耐電圧を
測定することを特徴とする中性子検出器の耐電圧測定方
法である。This invention can move from 0 Gault to 100 per second? The voltage applied to the electrode lead-out terminal is increased at a rate below the current level, and if the discharge current due to abnormal discharge is above a predetermined level, the voltage is reduced, and the voltage is increased again at the above rate to prevent damage. This is a method for measuring withstand voltage of a neutron detector, which is characterized by measuring the withstand voltage of a neutron detector.
これによって、検出器の静電容量成分への充電電流がほ
とんど無視でき、異常放電を正確に検出でき、放電によ
る破壊を防止しつつ所定レベルの耐電圧特性をもたせる
ことが容易にでき、信頼性の高い検出器を得ることがで
きる。As a result, the charging current to the capacitance component of the detector can be almost ignored, abnormal discharge can be detected accurately, and it is easy to provide a predetermined level of withstand voltage characteristics while preventing damage due to discharge, increasing reliability. A high detector can be obtained.
以下図面を参照してその実施例を説明する。 Examples thereof will be described below with reference to the drawings.
なお同一部分は同一符号であられす。Identical parts are designated by the same reference numerals.
この発明は第１図に例示するような測定回路構成で測定
する。同図において１１は被測定中性子検出器、Ｚ２は
陽極、１３は陰極を兼ねる外囲器、１４は絶縁体ス（−
サ（図示せず）により同軸状に配置された電極導出端子
、１ｓＦｉ耐電圧測定器、１６は測定用リード、１７は
交流電圧可変器、１８は高圧トランス、１９は整流回路
、Ｒ１は平滑用抵抗素子、Ｃは平滑コンデンサ、Ｒ２は
保護抵抗、Ｒ３はプリダ抵抗、Ｒ４は電圧検出用抵抗、
Ｒ５は電流検出用抵抗、２０は電圧検出回路、２ノは電
流検出回路、２２は放電検出・比較回路、２３Ｆ”ｉレ
コーダ、２４は電圧下降制御回路、２５は電圧上昇ステ
ップ切換回路、２６は電圧制御回路をあられしている。In the present invention, measurements are performed using a measurement circuit configuration as illustrated in FIG. In the figure, 11 is a neutron detector to be measured, Z2 is an anode, 13 is an envelope that also serves as a cathode, and 14 is an insulator (-
1sFi withstand voltage measuring device, 16 is a measurement lead, 17 is an AC voltage variable device, 18 is a high-voltage transformer, 19 is a rectifier circuit, and R1 is for smoothing. Resistance element, C is a smoothing capacitor, R2 is a protection resistor, R3 is a pre-da resistor, R4 is a voltage detection resistor,
R5 is a current detection resistor, 20 is a voltage detection circuit, 2 is a current detection circuit, 22 is a discharge detection/comparison circuit, 23 is a F''i recorder, 24 is a voltage drop control circuit, 25 is a voltage increase step switching circuit, 26 is a The voltage control circuit is damaged.
同図のように回路構成して測定するが、中性子検出器に
印加する電圧は、電圧上昇ステップ切換回路２５により
、電圧制御回路を２６を制御し、それによりトランスの
一次側の電圧可変器を駆動して電圧上昇度合を可変でき
るようになっている。すなわち第２図に示すように、例
えば直線Ｓ−７のように毎秒２５ｖで上昇するステップ
、Ｓ−２のように毎秒５０Ｖで上昇するステップ、Ｓ−
３のように毎秒１ｏｏｖで上昇するステップなど、およ
そ毎秒１００Ｖ以下の上昇率でいくつかのステップが選
択できるように構成されている。The circuit is configured as shown in the figure, and the measurement is performed. The voltage applied to the neutron detector is controlled by the voltage increase step switching circuit 25, which controls the voltage control circuit 26, which controls the voltage variable device on the primary side of the transformer. It can be driven to vary the degree of voltage rise. That is, as shown in FIG. 2, for example, a step that increases at 25V per second as shown by straight line S-7, a step that increases at 50V per second as shown in S-2, and a step that increases at 50V per second as shown in line S-2.
The configuration is such that several steps can be selected at a rate of increase of approximately 100 V per second or less, such as the step shown in No. 3 which increases at 100 V per second.
なお、電圧制御は、パルスモータのようなサーゲ機構に
より交流電圧可変トランスを駆動する構成を取ることも
できるし、あるいはＳＣＨのような半導体素子やマイコ
ンによる電圧可変回路にすることもできる。またｌＩ流
流電電圧直接電圧可変する回路にすることもできる。Note that the voltage control can be configured to drive an AC voltage variable transformer using a serge mechanism such as a pulse motor, or can be a voltage variable circuit using a semiconductor element such as an SCH or a microcomputer. It is also possible to use a circuit that directly varies the II current voltage.
次に測定例を説明する。第３図に示すように、中性子検
出器への印加電圧を直線Ｓ−１のようにＯＶから毎秒２
５Ｖの上昇率で直線的に上げて行く。このようなゆるや
かな電圧印加によると、長尺な中性子検出器の静電容量
成分への充電ｌｔ流はほとんど無視し得る程度である。Next, a measurement example will be explained. As shown in Figure 3, the voltage applied to the neutron detector is changed from OV to
Increase the voltage linearly at a rate of increase of 5V. With such gradual voltage application, the charging current to the capacitance component of the elongated neutron detector is almost negligible.
いま、５００Ｖを越えた時間ｔ、で中性子検出器内で異
常放電が発生したとする。その放ｔ’ａｔＮ、ｉを電流
検出回路２１で検出でき、その電流レベルを検出・比較
回路２２で電気的に比較判定する。Suppose now that an abnormal discharge occurs in the neutron detector at a time t when the voltage exceeds 500V. The discharge t'atN,i can be detected by the current detection circuit 21, and the current level is electrically compared and judged by the detection/comparison circuit 22.
そしてこの放電電流レベルが予め定めた所定レベルｌ
以上である場合は、その信号により電圧下降制御回路２
４が動作し、電圧制御回路２６を介して電圧可変器１７
を駆動し、印加電圧を一徐々に下降させるようになって
いる。そして再度直線Ｓ−１のようにＱＶから毎秒２５
Ｖの上昇率で電圧を印加する。放電電流が所定レベル以
下であれば、その放電で検出器はむしろクリーンアッグ
され耐電圧特性が向上するので、電圧上昇を続ける。Then, this discharge current level is set to a predetermined level l.
If it is above, the voltage drop control circuit 2
4 operates, and the voltage variable device 17 is activated via the voltage control circuit 26.
is driven, and the applied voltage is gradually lowered. Then, again like the straight line S-1, 25 per second from QV
Apply voltage at a rate of increase of V. If the discharge current is below a predetermined level, the detector is rather cleaned up by the discharge and its withstand voltage characteristics are improved, so the voltage continues to rise.
なお異常放電が検出されない場合は、自動的に１００Ｏ
Ｖの所定最大テスト電圧まで上昇し、一定時間保持した
うえ、徐々に下降して終了する。ｉた途中の放電が、所
定レベル以下で、電圧上昇を続けても中性子検出器が破
壊に至るおそれがないレベル以下であれば、上述のよう
に印加電圧上昇を続ける。また、初期には電圧上昇率を
小さく設定し、次に上昇率をステップ的に上げて数回繰
り返す。なお毎秒の電圧上昇が１００ｖ以下であれば、
実用上充電電流を無視でき、精度のよい耐電圧試験がで
きる。また必要だ応じて放電発生の電圧、波形などを各
回路やレコーダで記録し、放電の特徴や原因などを分析
することができる。In addition, if no abnormal discharge is detected, the
The voltage rises to a predetermined maximum test voltage of V, is held for a certain period of time, and then gradually falls to end. If the discharge during the process is below a predetermined level and below a level where there is no danger of the neutron detector being destroyed even if the voltage continues to rise, the applied voltage continues to rise as described above. In addition, the voltage increase rate is initially set small, and then the increase rate is increased in steps and repeated several times. Furthermore, if the voltage rise per second is 100V or less,
In practical terms, charging current can be ignored, allowing highly accurate withstand voltage tests. In addition, if necessary, the voltage and waveform of discharge occurrence can be recorded using each circuit or recorder, and the characteristics and causes of discharge can be analyzed.
以上のようにして、中性子検出器の非破壊試験を正確く
行なうことができる。In the manner described above, a non-destructive test of a neutron detector can be performed accurately.
以上説明したようにこの発明によれば、中性子検出器の
静電容量成分への充電電流をほとんど無視でき、異常放
電を正確圧検出でき、且つ放電による破壊を防止しつつ
所定レベルの耐電圧特性をもたせることができ、信頼性
の高い検出器を得ることができる・As explained above, according to the present invention, the charging current to the capacitance component of the neutron detector can be almost ignored, abnormal discharge can be accurately detected, and the withstand voltage characteristic can be maintained at a predetermined level while preventing destruction due to discharge.・A highly reliable detector can be obtained.
第１図はこの発明の実施例に使用する測定回路図、第２
図はその電圧上昇ステツブを示す特性図、第３図はこの
発明の方法を例示する特性図である。
１１・・・中性子検出器、１４・・・電極導出端子、１
５・・・耐電圧測定装置、２１・・・放電電流検出回路
、２２・・・放電検出・比較回路、２６・・・電圧制御
回路。
出願人代理人 弁理士 鈴 江 武 彦第１図
ＴＲＩ闇（免）−
篇２図
第３図Figure 1 is a measurement circuit diagram used in an embodiment of this invention;
The figure is a characteristic diagram showing the voltage increase step, and FIG. 3 is a characteristic diagram illustrating the method of the present invention. 11... Neutron detector, 14... Electrode lead terminal, 1
5... Withstand voltage measuring device, 21... Discharge current detection circuit, 22... Discharge detection/comparison circuit, 26... Voltage control circuit. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 TRI Darkness (Immunity) - Volume 2 Figure 3
Claims (1)
流電圧を印加して耐電圧を測定する方法において、 ０ボルトから毎秒１００ボルト以下の割合で印加電圧を
上昇し、異常放電の発生による放電電流が所定レベル以
上である場合は電圧を低減し、再度上記割合で電圧上昇
し、被破壊的に耐電圧を測定することを特徴とする中性
子検出器の耐電圧測定方法。[Claims] A method for measuring withstand voltage by applying a DC voltage to a neutron detector having a coaxial elongated electrode lead-out terminal, in which the applied voltage is increased from 0 volts at a rate of 100 volts per second or less. , a withstand voltage measurement of a neutron detector characterized in that when the discharge current due to the occurrence of abnormal discharge is above a predetermined level, the voltage is reduced and the voltage is increased again at the above rate to measure the withstand voltage in a non-destructive manner. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20480485A JPS6264976A (en) | 1985-09-17 | 1985-09-17 | Method for measuring withstand voltage of neutron detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20480485A JPS6264976A (en) | 1985-09-17 | 1985-09-17 | Method for measuring withstand voltage of neutron detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6264976A true JPS6264976A (en) | 1987-03-24 |
Family
ID=16496638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20480485A Pending JPS6264976A (en) | 1985-09-17 | 1985-09-17 | Method for measuring withstand voltage of neutron detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6264976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100446852B1 (en) * | 1997-04-30 | 2004-11-03 | 현대 이미지퀘스트(주) | Voltage regulating apparatus including voltage detection unit, control unit, and regulating voltage output unit |
| JP2006337226A (en) * | 2005-06-03 | 2006-12-14 | Furukawa Electric Co Ltd:The | Residual charge measuring method for cv cable |
| JP2016530517A (en) * | 2013-08-14 | 2016-09-29 | ディーエイチ テクノロジーズ デベロップメント プライベート リミテッド | Method and apparatus for ion mobility |
-
1985
- 1985-09-17 JP JP20480485A patent/JPS6264976A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100446852B1 (en) * | 1997-04-30 | 2004-11-03 | 현대 이미지퀘스트(주) | Voltage regulating apparatus including voltage detection unit, control unit, and regulating voltage output unit |
| JP2006337226A (en) * | 2005-06-03 | 2006-12-14 | Furukawa Electric Co Ltd:The | Residual charge measuring method for cv cable |
| JP4676255B2 (en) * | 2005-06-03 | 2011-04-27 | 古河電気工業株式会社 | CV cable residual charge measurement method |
| JP2016530517A (en) * | 2013-08-14 | 2016-09-29 | ディーエイチ テクノロジーズ デベロップメント プライベート リミテッド | Method and apparatus for ion mobility |
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