(i) Consider the following data for an RBMK Reactor-Power \(1000 \mathrm{MW}(\mathrm{e}) / 3200 \mathrm{MW}\) th, coolant outlet temperature \(285^{\circ} \mathrm{C}\), Calculate coolant inlet temperature if the core flow rate is \(19,000 \mathrm{~kg} / \mathrm{s}\) and the specific heat of water is assumed to be \(6000 \mathrm{~J} / \mathrm{kg} /{ }^{\circ} \mathrm{C}\). 

(ii) Also calculate the core inlet temperature for AGR given in Table 3.2 rated at a thermal power of \(1620 \mathrm{MW}\) th if the core gas flow rate is \(4000 \mathrm{~kg} / \mathrm{s}\) and the specific heat of \(\mathrm{CO}_{2}\) is \(1220 \mathrm{~J} / \mathrm{kg} /{ }^{\circ} \mathrm{C}\).

Data From Table 3.2:-

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TABLE 3.2 Comparison of graphite moderated power reactors. Active core size Reactor (height/ Fuel/ Fuel Coolant/ outlet Fuel Mass of burnup fuel (U) in (MWe) diameter) enrichment cladding temperature Efficiency (GWD/t) core (t) RBMK- 8 m/12 m Enriched Zr-1%Nb Light 31% 20 160-190 1000 UO2 (1.8% U-235) water/ 284C AGR- 660 8.3 m/9.5 m Enriched UO (2.3% U-235) Stainless Carbon- 41% 18 120-130 steel dioxide/ 700C