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Q3-Choose the correct choice: (five only) 15 Marks 1- The magnox reactor permits rather --------- to be achieved in comparison to the AGR reactor type. Lower coolant temperature b- equal coolant temperature c- higher coolant temp 2- Ina ..... --....--- a variety of coolants can be used. C- PWR reactor a- CANDU reactor LMFBR reactor BY 3- All CAN DU reactors used DjO. as a moderator because of the ----- a- high fuel temperature high neutron economy c-high breeding gain 4- The pressure tube in (CANDU) reactor must be insulated from the moderator because-- a- the coolant must operate at high temperature b- the coolant must operate at low temperature C- the coolant temperature must operate at moderate temperature 5- The AGR differs from HTGCR in --.-----. a- In the Coolant in the fuel c-in the coolant and the fuel 6- In the CANDU-PHW, A separate auxiliary circuit is employed : a- To circulate the heavy water moderator through external heat exchanger 6 To circulate the coolant through external heat exchanger c- To circulate fed water the through external heat exchanger