本文選題：一體化小型氟鹽冷卻高溫堆 + RELAP-MS　； 參考：《核技術(shù)》2017年06期

【摘要】：根據(jù)下一代核能系統(tǒng)的發(fā)展目標(biāo),提出了采用自然循環(huán)的一體化小型氟鹽冷卻高溫堆的概念。利用修改后的RELAR5-MS系統(tǒng)分析程序,建立了一體化小型氟鹽冷卻高溫堆模型,并得到其穩(wěn)態(tài)特性參數(shù)。在此基礎(chǔ)上,對(duì)其在滿功率運(yùn)行狀態(tài)下的反應(yīng)性引入事故和失熱阱事故進(jìn)行了分析。分析計(jì)算表明,在反應(yīng)性事故工況下,由于自然循環(huán)的存在,堆芯冷卻劑流量隨著堆芯溫度發(fā)生動(dòng)態(tài)變化,最終達(dá)到新的穩(wěn)態(tài),燃料棒和冷卻劑溫度均處于安全限值范圍內(nèi)。在失熱阱事故下,反應(yīng)堆負(fù)反饋的特性使得堆芯功率逐漸降低并實(shí)現(xiàn)自動(dòng)停堆,即使不考慮余熱排出系統(tǒng)的作用,燃料組件和冷卻劑溫度上升緩慢,在140 h內(nèi),燃料棒和冷卻劑溫度均處于全限值范圍內(nèi)。結(jié)果表明,一回路采用自然循環(huán)冷卻的一體化小型氟鹽冷卻高溫堆具有良好的固有安全性。
[Abstract]:According to the development goal of the next generation nuclear energy system, the concept of integrated small fluorine salt cooled high temperature reactor with natural circulation is proposed. Using the modified RELAR5-MS system analysis program, an integrated model of a small fluorine salt cooled high temperature reactor is established, and its steady-state characteristic parameters are obtained. On this basis, the reactive inductive accident and the heat loss trap accident under the full power operation state are analyzed. Analysis and calculation show that under the condition of reactive accident, due to the existence of natural circulation, the core coolant flow rate changes dynamically with the core temperature, and finally reaches a new steady state, and the fuel rod and coolant temperature are within the safe limit. Under the condition of heat loss well accident, the negative feedback characteristics of the reactor make the core power gradually decrease and realize the automatic shutdown. Even if the residual heat removal system is not considered, the temperature of fuel assembly and coolant rises slowly, and within 140 hours, the temperature of fuel assembly and coolant increases slowly, and the temperature of fuel assembly and coolant increases slowly within 140 hours. Fuel rod and coolant temperature are within the full limit range. The results show that the integrated small fluorine salt cooled high temperature reactor with natural cycle cooling in primary circuit has good inherent safety.
【作者單位】： 中國(guó)科學(xué)院上海應(yīng)用物理研究所;中國(guó)科學(xué)院大學(xué);上�？萍即髮W(xué);
【基金】：中國(guó)科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(xiàng)(No.XDA02050)資助~~
【分類號(hào)】：TL364

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