Skip to main content

RADIOACTIVE WASTES

 RADIOACTIVE WASTES 



  1. Initially, nuclear energy was hailed as a non-polluting way for generating electricity. 
  2. Later on, it was realised that the use of nuclear energy has two very serious inherent problems. 
  3. The first is accidental leakage, as occurred in the Three Mile Island and Chernobyl incidents and the second is safe disposal of radioactive wastes. 
  4. Radiation, that is given off by nuclear waste is extremely damaging to biological organisms, because it causes mutations to occur at a very high rate. 

  6. At high doses, nuclear radiation is lethal but at lower doses, it creates various disorders, the most frequent of all being cancer. 
  7. Therefore, nuclear waste is an extremely potent pollutant and has to be dealt with utmost caution. 
  8. It has been recommended that storage of nuclear waste, after sufficient pre-treatment, should be done in suitably shielded containers buried within the rocks, about 500 m deep below the earth’s surface. 
  9. However, this method of disposal is meeting stiff opposition from the public.



Labels:

Comments

Post a Comment

Popular posts from this blog

AIR POLLUTION

AIR POLLUTION   We are dependent on air for our respiratory needs.  Air pollutants cause injury to all living organisms.  They reduce growth and yield of crops and cause premature death of plants.  Air pollutants also deleteriously affect the respiratory system of humans and of animals.  Harmful effects depend on the concentration of pollutants, duration of exposure and the organism.  Smokestacks of thermal power plants, smelters and other industries release particulate and gaseous air pollutants together with harmless gases, such as nitrogen, oxygen, etc.  These pollutants must be separated/ filtered out before releasing the harmless gases into the atmosphere.  Electrostatic precipitator There are several ways of removing particulate matter; the most widely used of which is the electrostatic precipitator, which can remove over 99 per cent particulate matter present in the exhaust from a thermal power plant.  It has electrode wires that are m...
Post a Comment
Read more

HUMAN CIRCULATORY SYSTEM

😎 Human Circulatory System 😎 Human circulatory framework, additionally called the blood vascular framework comprises of a strong chambered heart, an organization of shut fanning veins and blood, the liquid which is circled.  Heart, the mesodermal determined organ, is arranged in the thoracic hole, in the middle of the two lungs, marginally inclined to one side. It has the size of a held clench hand. It is ensured by a twofold walled membranous sack, pericardium, encasing the pericardial liquid.  Our heart has four chambers, two moderately little upper chambers called atria and two bigger lower chambers called ventricles.  A slight, solid divider called the interatrial septum isolates the privilege and the left atria, while a thick-walled, the between ventricular septum, isolates the left and the correct ventricles.  The chamber and the ventricle of a similar side are likewise isolated by a thick stringy tissue called the atrio-ventricular septum.  Notwithstand...
3 comments
Read more

HUMAN EXCRETORY SYSTEM

  😎 HUMAN EXCRETORY SYSTEM  😎  In humans, the excretory system consists of a pair of kidneys, one pair of ureters, a urinary bladder and a urethra.  Kidneys are reddish brown, bean shaped structures situated between the levels of last thoracic and third lumbar vertebra close to the dorsal inner wall of the abdominal cavity.  Each kidney of an adult human measures 10-12 cm in length, 5-7 cm in width, 2-3 cm in thickness with an average weight of 120- 170 g. Towards the centre of the inner concave surface of the kidney is a notch called hilum through which ureter, blood vessels and nerves enter.  Inner to the hilum is a broad funnel shaped space called the renal pelvis with projections called calyces.  The outer layer of kidney is a tough capsule.  Inside the kidney, there are two zones, an outer cortex and an inner medulla.  The medulla is divided into a few conical masses (medullary pyramids) projecting into the calyces (sing.: calyx)....
Post a Comment
Read more