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STCP MOD 1.1是BCL于1987年4月底发展成功的改进型一体化程序包,,国际上已正式用以计算核电站发生严重事故时放射性物质向环境释放的情况。程序总体结构由五个单元组成,即MARCH3,THCCA,VANESA,TRAP-MELT3和NAUA(包括SPRC,ICEDF)。计算流程示于图1,其中MARCH3由MARCH2,CORSOR-M,CORCON-MOD 2组成,TRAP-MELT3由TRAP-MELT2和MERGE组成。MARCH3用于分析轻水堆内堆芯。主回路冷却系统和安全壳系统对事故
STCP MOD 1.1 is an integrated improvement package developed by BCL at the end of April 1987. It has been formally used internationally to calculate the release of radioactive material to the environment in the event of a serious accident at a nuclear power station. The overall structure of the program consists of five elements: MARCH3, THCCA, VANESA, TRAP-MELT3 and NAUA (including SPRC, ICEDF). The calculation scheme is shown in FIG. 1, in which MARCH3 consists of MARCH2, CORSOR-M and CORCON-MOD 2, and TRAP-MELT3 consists of TRAP-MELT2 and MERGE. MARCH3 is used to analyze the core within a light water reactor. Main circuit cooling system and containment system on the accident