Correct answer: (b) Some use imported uranium and others use domestic supplies.
Explanation
- A
Some use uranium and others use thorium
Uranium vs thorium. PHWRs use natural U; thorium is not the IAEA split.
- B
Some use imported uranium and others use domestic supplies.
Imported uranium vs domestic. Civil reactors on foreign fuel are under IAEA safeguards; military/unsafeguarded plants use domestic fuel.
- C
Some are operated by foreign enterprises and others are operated by domestic enterprises
Foreign vs domestic operators. NPCIL runs both kinds.
- D
Some are State-owned and others are privately-
State vs private. Nuclear generation is not a private-operator split here.
Summary. Official key is (b). After the Indo-US civil nuclear deal, imported-fuel civil reactors are placed under IAEA safeguards. Reactors on the military/unsafeguarded list use domestic uranium and are not.
Same topic · past papers
UPSC has asked this before
These previous-year questions sit on the same topic. Open one to practise the earlier ask.
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2024 · Q31 · General Studies · 2 marks
With reference to radioisotope thermoelectric generators (RTGs), consider the following statements: 1. RTGs are miniature fission reactors. 2. RTGs are used for powering the onboard systems of spacecrafts. 3. RTGs can use Plutonium-238, which is a by-product of weapons development Which of the statements given above are correct?