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[...]
Effects of Burnable Poison and Chemical Shim
The excess reactivity must be included in an initial reactor core in order to obtain the normal power during the required operation period. This reactivity control is mainly provided by control rods. The combined use of burnable poison and chemical shim lessens the need for control rods in thermal reactors and is intended to ensure a long operation period of the reactor.