Characteristic

Brest-300

Brest-1200

Thermal power, MW

700

2800

Electrical power, MW

300

1200

Number of fuel assemblies in the reactor core, pcs.

185

332

Reactor core diameter, mm

2300

4755

Reactor core height, mm

1100

1100

Fuel element diameter, mm

9.1; 9.6; 10.4

9.1; 9.6; 10.4

Fuel element pitch, mm

13.6

13.6

Reactor core fuel

UN + PuN

UN + PuN

Fuel element column, (U + Pu)N, t

16

63.9

Fuel element column, Pu/(Pu²³⁹ + Pu²⁴¹), t

2.1/1.5

8.56/6.06

Fuel-element lifetime, years

5

5-6

Reloading interval, years

1

1

KVA

~1

~1

Power effect, % DK/K

0.16

0.15

Entire effect, % DK/K

0.35

0.31

Delayed neutron fraction, b_eff %

0.36

0.34

Lead in/out temperature, ˚С

420/540

420/540

Maximum temperature of fuel element cladding, ˚С

650

650

Maximum lead flow rate, m/s

1.8

1.7

Steam temperature at the steam generator outlet, ˚С

340/520

340/520

Steam generator output pressure, MPa

24.5

24.5

Lead flow, t/s

40

158.4

Steam generator capacity, t/s

0.43

1.72

Net efficiency of power-generating unit, %

43

43

Expected useful life, years

30

60