INES - GS questions based on daily current affairs

1)   Which of the following is/are true?

1) The International Nuclear and Radiological Event (INES) scale has been developed by Atomic Energy Regulatory Board.
2) It consists of a scale from 1 to 5 with 1 being the most serious and damaging level of incident.

a. Only 1
b. Only 2
c. Both 1 and 2
d. Neither 1 nor 2
Answer  Explanation 

ANSWER: Neither 1 nor 2

Explanation:

  • Akin to the Richter scale, used to quantify the severity of an earthquake, the International Nuclear and Radiological Event (INES) scale is developed by the International Atomic Energy Authority.
  • It has seven-rung classification scheme internationally used to rate the severity of nuclear mishaps.
  • It rates a Level 1 as only akin to ‘an anomaly in the plant.’ Levels 1-3 are termed ‘incidents’ and 4-7 as ‘accident.’ By comparison, the nuclear accidents in Fukushima, Japan, in 2011 and Chernobyl, Russia, in 1986 were Level 7 incidents.
  • Recently in Kakrapar Nuclear Power plant, one of the pipes carrying heavy water ruptured and led to leakage on the floor of the reactor building. Moreover, the leak occurred in a subsystem that had been refurbished with better quality material in 2011, as part of a planned upgrade.
  • The leak has been classified as level 1 incidence.

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