Why is enriched Uranium required as fuel when ordinary water is used a

1.	Why is enriched Uranium required as fuel when ordinary water is used as a moderator?
A.	Ordinary water has low moderating efficiency
B.	Ordinary water has high moderating absorption
C.	Ordinary water has high moderating efficiency
D.	Ordinary water has low neutron absorption.
Answer» C. Ordinary water has high moderating efficiency

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Why is enriched Uranium required as fuel when ordinary water is used as a moderator?

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