本文選題：非能動(dòng)　切入點(diǎn)：安全殼冷卻系統(tǒng)　出處：《哈爾濱工程大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：當(dāng)核反應(yīng)堆內(nèi)發(fā)生如冷卻劑喪失事故(LOCA)和主管道蒸汽破裂事故(MSLB)等嚴(yán)重事故時(shí)，安全殼內(nèi)會(huì)由于高溫工質(zhì)（水、水蒸氣以及氫氣等）的排放而產(chǎn)生升溫升壓效應(yīng)，若不及時(shí)排除熱量，安全殼可能會(huì)因超溫超壓而失效，因此需要設(shè)計(jì)一個(gè)可靠的安全殼熱量導(dǎo)出系統(tǒng)。本文中所研究的安全殼熱量導(dǎo)出系統(tǒng)采用非能動(dòng)原理，利用系統(tǒng)回路內(nèi)冷熱流體之間的密度差產(chǎn)生的自然循環(huán)驅(qū)動(dòng)力，通過(guò)冷凝、對(duì)流及沸騰換熱的方式，對(duì)安全殼內(nèi)的大氣進(jìn)行降溫降壓。根據(jù)系統(tǒng)配置結(jié)構(gòu)，，可以分為閉式與開(kāi)式系統(tǒng)，其中閉式系統(tǒng)因系統(tǒng)壓力高低可以分為單相和兩相系統(tǒng)。 本研究中針對(duì)三種不同的熱量導(dǎo)出系統(tǒng)，采用C語(yǔ)言自主開(kāi)發(fā)系統(tǒng)的熱工水力分析程序PCCS-C，對(duì)系統(tǒng)在不同的安全殼內(nèi)環(huán)境條件和不同系統(tǒng)結(jié)構(gòu)條件下進(jìn)行系統(tǒng)自然循環(huán)能力及排熱能力的數(shù)值模擬計(jì)算分析，并根據(jù)計(jì)算結(jié)果對(duì)系統(tǒng)進(jìn)行改進(jìn)。計(jì)算的結(jié)果表明，三種系統(tǒng)對(duì)事故后安全殼內(nèi)環(huán)境有著良好的自適應(yīng)性，在一定范圍內(nèi)變化的系統(tǒng)標(biāo)高差對(duì)各系統(tǒng)的自然循環(huán)能力和排熱能力均無(wú)顯著影響。 此外，根據(jù)各個(gè)系統(tǒng)的設(shè)計(jì)參數(shù)和結(jié)構(gòu)參數(shù)，采用RELAP5/MOD3.4程序?qū)ο到y(tǒng)的運(yùn)行特性和影響因素進(jìn)行仿真計(jì)算與分析，并將計(jì)算結(jié)果與自主開(kāi)發(fā)的熱量導(dǎo)出系統(tǒng)熱工水力特性分析程序的結(jié)果進(jìn)行比較。結(jié)果表明Relap5對(duì)閉式單相系統(tǒng)的計(jì)算結(jié)果與PCCS-C程序的計(jì)算結(jié)果能較好的吻合，閉式兩相與開(kāi)式系統(tǒng)的計(jì)算結(jié)果趨勢(shì)與PCCS-C程序的結(jié)果趨勢(shì)一致。
[Abstract]:When serious accidents such as loss of coolant and steam rupture in main pipes occur in a nuclear reactor, the pressure rise in containment will be due to the discharge of high temperature working fluids (water, water vapor, hydrogen etc.). If the heat is not eliminated in time, the containment may fail because of overtemperature and overpressure, so it is necessary to design a reliable heat derivation system for containment. The passive principle is used in the heat derivation system of containment studied in this paper. Using the driving force of natural circulation caused by the density difference between the cold and hot fluids in the system loop, the temperature and pressure of the atmosphere in the containment are reduced by means of condensation, convection and boiling heat transfer. According to the configuration of the system, It can be divided into closed system and open system, which can be divided into single phase system and two phase system because of system pressure. In this study, for three different heat transfer systems, The thermal hydraulic analysis program PCCS-Cdeveloped by C language was used to simulate and analyze the natural circulation capacity and heat discharge capacity of the system under different containment environment conditions and different system structure conditions. According to the calculation results, the system is improved. The results show that the three systems have good adaptability to the environment of the containment after the accident. There is no significant effect on the natural circulation capacity and heat removal capacity of each system with the system height difference varying within a certain range. In addition, according to the design parameters and structural parameters of each system, the operating characteristics and influencing factors of the system are simulated and analyzed by RELAP5/MOD3.4 program. The calculated results are compared with the results of the self-developed thermohydraulic analysis program for the heat derived system. The results show that the results of Relap5 for the closed single-phase system are in good agreement with the results of the PCCS-C program. The result trend of closed two phase and open system is consistent with that of PCCS-C program.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TL364.3

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