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1. Give the function of control rods in a nuclear reactor.
Control rods are used to by controlling the number of . Control rods are usually made of to absorb the neutrons. The rods are fixed in the walls of the reactor.
2. In Japan, some of the new born children are having congenital diseases. Why?
During the time of nuclear reaction, control rods are used in two stages.
In the , the control rods are completely inserted into the reactor to absorb all the emitted neutrons and to avoid any further fission reactions.
In the , the control rods are taken out of the reactor when the right number of neutrons is available to maintain the controlled fission reaction at the required rate.
2. In Japan, some of the new born children are having congenital diseases. Why?
A congenital disorder is a medical condition that is present at or before birth. These conditions, also referred to as , can be acquired during the fetal stage of development or from the genetic make up of the parents.
During the World War II, a bomber dropped the nuclear weapons over the Japanese cities of and . In the explosion of the , a high energy dangerous radiation were released. Due to explosion, Japanese people are affected by . This is the reason in Japan, some of the new born children are having congenital diseases.
3. Mr. Ramu is working as an \(X\) - ray technician in a hospital. But, he does not wear the lead aprons. What suggestion will you give to Mr. Ramu?
X – rays have a destructive effect on living tissue. When the human body is exposed to X – rays, it causes redness of the skin, sores and serious injuries to the . It destroys the of the blood. If one does not wear the lead aprons, these kinds of disease will occur in the body.
In my suggestion,
(i) Mr. Ramu must wear lead apron because X-rays may him.
(ii) Mr. Ramu can use a to measure the amount of exposure to ionizing radiation.
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