Как выбрать гостиницу для кошек
14 декабря, 2021
Сегодня каждый, кто собирается в отпуск и не знает, с кем оставить своего котика или кошку, может во[...]
Control
4.5.1. Control mechanisms
Four types of control for integral reactor were identified in addition to soluble boron as given in the table below:
|
Type |
Advantages |
Disadvantages |
|
Conventional external drives |
Proven. |
Need height for drives. Rod ejection possibility. Long rod connectors in integral designs. |
|
Internal hydraulic |
Reduced number of penetrations. Simple. Compact. No rod ejection. |
Need reliability data. |
|
Internal electro — mechanical |
Reduced penetrations. Compact. No rod ejection. Requires only cable connection. |
R & D needed. |
|
No rods (not suitable for present generation loop type reactors) |
Simple Eliminates all rod accidents Compact |
No fast scram. Safety during design basis and beyond design accidents must be demonstrated. |