UPSC General Studies Sample Paper General Studies Sample Paper-5

  • question_answer
    Recently, India achieved a significant milestone in nuclear technology when the Pressurised Water Reactor (PWR) aboard INS Arihant achieved criticality. The PWR aboard INS Arihant differs from PHWR of India in which of the following ways?
    1. PWR uses enriched uranium and PHWR are using natural uranium.
    2. PWR uses ordinary water as both moderator and coolant.
    3. PWR reactors require much lesser enrichment.
    Select the correct answer using the codes given below.

    A)  Only 1             

    B)  1 and 2

    C)  1 and 3           

    D)  All of these

    Correct Answer: B

    Solution :

    [b] PWR reactors require much higher enrichment. An identical PWR of the same capacity is already operating in Kalpakam. They act as forerunners to the DAE building commercial PWRs in India.

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