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頁籤選單縮合
題名 | 飼水斷管事件的BOP和RPV沖放之認証分析研究=Licensing Analysis of Both BOP and RPV Blowdown for the Events of Feedwater Line Break |
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作者 | 陳王湶; 鄭素琴; 楊宗祐; 戴良哲; 白寶實; 洪祖全; | 書刊名 | 台電工程月刊 |
卷期 | 692 民95.04 |
頁次 | 頁1-17 |
分類號 | 449.8 |
關鍵詞 | 冷卻水流失事故; 飼水管路斷管; 沖放分析; Loss of coolant accident; LOCA; Feedwater line break; FWLB; Blowdown analysis; RELAP5-3D; |
語文 | 中文(Chinese) |
中文摘要 | 在結合反應爐壓力槽(RPV)和電廠平衡系統(BOP)的模式中,RELAP5-3D Appendix K版程式被成功應用於核四廠飼水管路瞬時斷管水流冲放之模擬分析上。為了能適切模擬RPV和BOP之飼水管路斷管水流沖放事件,反應爐系統、主蒸氣系統、汽機系統、主冷凝系統、冷凝水系統及飼水系統皆包含在分析模式的模擬範疇中。模擬範疇中重要之元件包括了(1)RPV、(2)主蒸氣集管、(3)高低壓汽機、(4)汽水分離再熱器、(5)飼水泵汽機、(6)主冷凝器、(7)冷凝水泵及冷凝水增壓泵、(8)六級的飼水加熱器、(9)七級高低壓汽機之蒸氣抽汽管、(10)汽機驅動飼水泵及(11)緊急爐心冷卻(ECC)注水。以上各元件間的銜接管路亦被模擬。 關於飼水管路斷管事件,一些重要現象亦適當地包含在模擬中。這些現象有(1)雙斷管端的臨界水流和飼水內側文氏管(Venturi)及RPV內部的飼水噴灑、(2)飼水泵的脫羈(Run Out)和慣性減速(Coast Down)、(3)斷管處飼水和RPV內部水的閃化、(4)高低壓汽機和飼水泵汽機的蒸氣抽汽、(5)飼水加熱器殼側及汽水分離再熱器洩水槽內飽和水的閃化、(6)系統金屬之能量釋放、(7)主冷凝器中冷凝水傳送至斷管處及(8)緊急爐心冷卻(ECC)注水至RPV。先進的RELAP5-3D Appendix K版程式在飼水管路斷管事件中成功地模擬所有重要的過程。以RELAP5-3D/K模擬飼水管於一次圍阻體內部及外部發生斷管時所得的修正沖放水流量及沖放水焓值,將可作為龍門核電廠進行FSAR圍阻體最終溫壓安全分析所須之最新且最可靠的分析輸入資料。 |
英文摘要 | The blowdown of both reactor pressure vessel (RPV) and balance of plant (BOP) for the events of feedwater line break (FWLB) has been succeffully analyzed by using the Appendix K Version of RELAP5-3D. To adequately simulate the RPV and BOP blowdown, reactor system, main steam system, turbine systems, main condenser, and condensate and feedwater (FW) system are all involved in the modeling scope. The essential components of the simulation scope include (1) RPV, (2) steam header, (3) high pressure and low pressure turbines, (4) moisture separator re-heater (MSR), (5) feedwater pump (FWP) turbines, (6) main condenser, (7) condensate and booster pumps, (8) feedwater heaters of six stages, (9) steam extraction of seven stages, (10) turbine driven feedwater pumps, and (11) emergency core cooling (ECC) injections. All the components are connected by associated piping as designed. Regarding the feedwater line break, several essential phenomena involved are properly simulated. Those phenomena include (1) critical flow at both break ends, and the internal FW venturi and FW spargers inside RPV, (2) run out and coast down of the feedwater pumps, (3) flashing of water inside RPV and feedwater near the break, (4) steam extraction to feedwater heaters and FWP turbines, (5) flasing of saturated water initially stored inside the feedwater heater shell sides and drain tanks, (6) energy release from system metal, (7) cold water transportation from the main condenser to the break, and (8) ECC injections into RPV. The revised blowdown flow and enthalpy by using RELAP-3D/K for both inboard and outboard FWLBs can provide a new and solid basis for the FSAR containment design analysis for the Lungmen nuclear power plant. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。