Typical BWR/3 & BWR/4 HPCI • Maintains adequate core cooling on small break LOCAs. • Assist Low Pressure ECCSs on Intermediate LOCAs. • Backs up RCIC. Figure 6.1-3

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.

Jan 14, 2025 · The RCIC is used in BWR-3 through BWR-6 boiling water reactor designs. The RCIC system is a single train standby system for safe shut down of the plant. The system is not considered part of the emergency core cooling system (ECCS), and does not have a loss of coolant accident (LOCA) function.

The BWR/5 and BWR/6 product lines provide reactor vessel pressure and water level control during isolated conditions with the RCIC system (figure 6.3-3). The basic RCIC system remains unchanged except for changes in turbine gland sealing and pump discharge. Some BWR/6s were designed to have the RCIC system discharge into the

Identify the Emergency Core Cooling Systems (ECCSs) used for each BWR product line. In each BWR product line, recognize how ECCSs operate in conjunction such that for the full range of LOCA sizes, no single failure will cause core damage.

With the loss of the EDGs, cooling to the fuel in the core was being provided by the reactor core isolation cooling (RCIC) system. The RCIC system uses steam generated in the reactor from the decay heat to power a turbine driven pump. The pump is supplied with water initially from a condensate storage tank (CST).

Mar 14, 2017 · The resulting root cause explanation of successful long-term passive injection and core cooling is a crucial insight because RCIC resides in most of the existing BWR fleet.

沸騰水型原子炉（BWR）において、異常な事象が発生し、通常の系統による原子炉への給水が出来なくなった時、原子炉の蒸気を駆動源とするポンプによって給水する系統をいう。 RCIC（Reactor Core Isolation Cooling system)とも略される。 原子炉の冷却系（主蒸気系、復水系等）において配管破断等の異常事象が生じた際、原子炉は安全の確保のため主蒸気隔離弁を閉止して外部から隔離する。 この状況では、通常のタービン主復水器からの復水、給水系に …

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 …

Apr 20, 2016 · The reactor core isolation cooling (RCIC) system is an auxiliary system of a boiling water reactor (BWR) that provides makeup water in the case of a severe accident. During the Fukushima accident, the extended operation of the RCIC had a large influence on the accident progression and delayed the core meltdown by almost 70 h.