Application of MSHTM Base Load in Core Simulator of COSINE Project

摘要

MSHIM is a new strategy proposed by Westinghouse which not bring out in the real reactor yet. More numerical simulation and analysis is necessary. MSHIM could control the reactor in a steady condition, using the AO-bank to keep the AO in a target band and adjusting the reaction by control rod and soluble boron. The MSHIM simulation module in cosCore code is developed in this paper. The code is able to perform the AP1000 base load operation, as well as the soluble boron, M-banks, AO-bank, average temperature and AO value simulation. The results demonstrate that the reactor could be keep in a steady condition through combination several control parameters, such as control rod, inlet temperature and soluble boron. The boron let-down curve shows a stair shape. Compared with the traditional control strategy, MSHIM operation strategy, which is achieved by cosCore, significantly decreases the frequency and the time spent of soluble boron dilution, increases the operation flexibility through control rod application. Moreover, AO is well controlled by AO-bank within the dead band in a range near the target AO value.