中子偵檢器洩漏電流檢測系統之建立

台電第一核能發電廠之反應器從起動到滿載功率運轉，其爐心功率能階的偵測全仰賴中子偵測系統，因中子之多寡和功率能階成正比，故偵測中子多寡亦即偵測反應器之功率。偵測反應器爐心中子通量之中子偵檢器合計99只，於機組停機大修期間，須對每只中子偵檢器執行洩漏電流測試，以確保中子偵檢器可於下次機組運轉期間，正常監視各種情況下爐心中子通量，避免因中子偵檢器老化損壞，而對核能電廠運轉安全造成影響。中子偵檢器洩漏電流早期之測試方式，既煩瑣又耗費人力，且當檢測後數據輸入電腦存檔時，易因人為疏失，而導致檢測數據錯誤，本論文針對上述問題構思，規劃以模組化之測試設備及撰寫檢測程式與數據資料庫，整合為一中子偵檢器專屬之檢測系統。此系統之建立對於偵檢器洩漏電流之檢測過程化繁為簡、精簡測試人力；提高檢測數據之精確度與偵檢器老化趨勢分析之能力，有顯著之貢獻。

關鍵字

廣程中子偵測；局部能階偵測；平均能階偵測；阻棒偵測；爐心探針；震盪功率階偵測

並列摘要

The reactor of First Nuclear Power Plant of Taiwan Power Company from start-up to full power operation, the core power level measurement depends on the Power Range Neutron Monitoring System. Due to the neutron flux is proportional to the core power level, the measurement of the amount of neutron flux means measuring of reactor power. The neutron detector of detect the reactor neutron flux giving a total of 99. During the unit outage, it has to implement the leakage current (I / V Curve) tests of each neutron detector to ensure that the neutron detector can monitor all cases core neutron flux normally at the next unit operation period. Therefore, it can avoid the damage of Neutron detectors of aging, while affect the safety of nuclear power plant. The earlier testing method of Neutron detector leakage current was cumbersome and labor-intensive. And when the post-test data into the computer file, is easy because of human error which led to the detection of data errors. For the effective deployment of labor power, This paper improve the neutron detector testing methods to simplify the detection process of leakage current test of the neutron detector, planning for modular testing equipment and writing a test program and database then integrate that as a dedicated test system of neutron detector. It is a significant contribution to reduce the number of labor of testing and to improve the analysis capability of detection data.