Neutronic design investigation of a liquid injection-based second shutdown system for a typical research reactor using MCNPX

作     者：Ehsan Boustani Mostafa Hassanzadeh 

作者机构：Nuclear Science and Technology Research Institute (NSTRI)Reactor and Nuclear Safety School 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2018年第29卷第3期

页      码：51-60页

摘      要：Safety systems, built on state-of-the-art technology, are essential for achieving acceptable levels of plant safety to minimize hazards to the reactor and the general public. The second shutdown system(SSS) as an engineered safety feature and a part of the reactor protection system(RPS) is a means for rapidly shutting down a nuclear reactor, keeping it in a subcritical state and serving as a backup to the first shutdown system(FSS). In this research, one SSS with two types of optimum chamber designs is proposed that take into account the main current characteristic features of the Tehran research reactor with improvements over earlier designs. They are based on a liquid neutron absorber injection that is preferably different, diverse, and independent from the FSS based on the rod drop mechanism. The major design characteristics of this SSS with two different chambers were investigated using MCNPX 2.6.0 code. The performed calculations showed that the designed SSS is a reliable shutdown system, assuring an appropriate shutdown margin and injection time, with no significant effects on the effective delayed neutron fraction while causing minimal variations to the core structure. Further, the reasonable financial cost and the prolongation of the operation cycle are additional advantages of this design.

主 题 词：Tehran research reactor Second shutdown system Nuclear safety Design criteria MCNPX code 

学科分类：08[工学] 0827[工学-食品科学与工程类] 

核心收录：

D　O　I：10.1007/s41365-018-0372-6

馆 藏 号：203284534...