1. Identify the purposes of the re sidual heat removal (RHR) system. 2. Summarize the purpose, function and operation of the following major system components: a. Suppression pool and shutdown cooling suction valves b. RHR pumps c. Minimum flow valve d. RHR heat exchanger e. Containment spray spargers f. Li fillLine fill 3.

The residual heat removal RHR system is a versatile high capacity low pressure system that can be used for cooling and/or inventory control. The RHR System, (Figures 10.4-1 & 10.4-3) has six operational modes. The functional classification of the RHR System is that of a safety related system. Its regulatory classification is an Engineered Safety

Table 6.0-1 has been developed to allow comparisons of various BWR functions for the product lines BWR/2 thi'ough BWR/6. The figures in this chapter illustrate most of the more important differences indicated in the tables.

Boiling water reactor safety systems are nuclear safety systems constructed within boiling water reactors in order to prevent or mitigate environmental and health hazards in the event of accident or natural disaster.

2025年1月14日 · The residual heat removal (RHR) system is typically a multiple use system with modes of operation for low-pressure injection, shutdown cooling, suppression pool or containment sump cooling, and/or containment spray.

This report presents an unreliability evaluation of the residual heat removal (RHR) system in two modes of operation (low-pressure injection in response to a large loss-of-coolant accident and in response to post-trip shutdown cooling) at 93 U.S. commercial operating nuclear reactors.

The residual heat removal system (RHR) is a low-pressure heat removal system. PWRs take water from one or two RCS hot legs, cool it in RHR heat exchangers, and pump it back to the cold legs or core flooding tank nozzles.

2018年1月1日 · The Boiling Water Reactor (BWR) is based on two fundamental principles that distinguish it from other nuclear power plant reactors: (1) bulk boiling of water occurs in the reactor core; and (2) steam produced from boiling in the reactor core is sent directly to the turbine that is used to turn a generator to produce electricity.

2012年1月1日 · The boiling water reactor (BWR) is divided into two main systems: the nuclear steam supply system (NSSS) that generates steam, and the turbine system (or turbine island) that uses the stream to rotate turbo-generator and generate electric power.

2016年4月15日 · The analysis is aimed at determining the required alternative cooling water flow capacity for the residual heat removal (RHR) heat exchanger when its tube-side sea water cooling flow path is blocked, due to some reason such as earthquake or tsunami, and is switched to the alternative raw water source.