UNIT 13 REACTOR VESSSEL AND INTERNALS 压力容器和堆内构件

UNIT 13 REACTOR VESSSEL AND INTERNALS
压力容器和堆内构件
1.The reactor vessel and internals support and align the reactor
core and its associated components.
压力容器和堆内构件的作用就是支撑和定位堆芯及其相关组件。

2.Additionally, the vessel and internals provide a flowpath to e
nsure adequate heat removal capability from the fuel assemblie s.
此外，它们还提供冷却剂流道，保证有足够的能力将燃料组件中的热量带出。

3.The reactor vessel is a cylindrical, with a welded hemispheric
al bottom head and a removable, flanged and gasketed, hemispher ical upper head.
压力容器呈圆柱形，包括焊接的半球型底部和可移动的，法兰密封的半球型顶盖。

4.The head flange is sealed to the vessel flange by two metallic
“o” rings which fit into grooves machined in both flanges.
顶盖法兰和上筒体的法兰之间用两道金属‘0’型密封圈密封，两个法兰中都有凹槽。

5.The reactor vessel and head are constructed of a manganese moly
bdenum alloy steel with all surfaces in contact with the reacto r coolant clad with weld deposited stainless steel for corrosio n resistance.
压力容器由钼锰合金锻造而成，在与冷却剂接触的内表面焊有不锈钢层以防止腐蚀。

6.Sample of reactor vessel and weld materials are provided to ev
aluate the effect of radiation on the fracture toughness of the reactor vessel.
辐照对压力容器断裂强度的影响，其评估由压力容器和焊接材料的试样来完成。

（指辐照监督管内的样品）
7.Reactor vessel closure head penetrations include: control rod
drive mechanism adapters and reactor vessel head vent.
堆顶贯穿件包括：控制棒驱动机构和顶部放气管。

8.The bottom head of the vessel contains penetrations for connec
tion and entry of the in-core nuclear instrumentation.
压力容器底部贯穿件主要有堆内核测仪表的连接件和通道。

9.The reactor internals consist of the lower support structure,
the upper support structure and the in-core instrumentation sup port structure.
堆内构件主要包括下部支撑件、上部支撑件和堆内仪表支撑件。

10.Lower core support structure consists of the core barrel, the
core buffer, the lower core plate and support columns, the ther mal shield, the intermediate diffuser plate and the core suppor t.
下部支撑件有以下部件组成：吊兰，缓冲器，下部底板，支撑柱，热屏，流量分配板和堆芯支撑板。

11.A thermal shield attached to the core barrel is provided to re
duce radiation damage to the reactor vessel during operation.
附在吊兰上的热屏的作用就是为了在正常运行时减少压力容器的辐照损伤。

12 .The upper core support structure consists of the upper support assembly and the upper core plate, between which are contained support columns and co ntrol rod guide tubes.
上部支撑件由上部支撑组件和堆芯上板组成，两者之间是支撑柱和控制棒导向管。