On Saturday, Unit 2 was transferred to the operation of the so called power effect of reactivity. During this period, the reactor power will be slowly decreased till 95 % RTP. In connection to the reactor power, the turbine generator output will be reduced.  The power effect operation will be terminated on Friday, April 30, when the unit will be as planned disconnected of the grid and a 50 days’ refueling outage will be commenced.

The reactor uses to be brought to the power effect of reactivity operation in the end of the fuel campaign. The power effect of reactivity operation means that the fuel was optimally used during the fuel campaign. Those are desired conditions signaling good unit performance within the period from one refueling outage to another one. During the power effect of reactivity operation, the reactor power is decreased step by step. It is just at the lower reactor power that energy can be additionally acquired from spent fuel assemblies and, hereby, to use them most effectively.

Information on parameters at Unit 1 today on April 26, 2010 at 10:15 o‘clock:

• Unit is in Mode 1 - power operation
• Reactor power is 100 %
• Turbine generator output - 1015 MWe
• Electricity production since the beginning of the year: 2 770 799 MWh

Information on parameters at Unit 2 today on April 26, 2010 at 10:15 o‘clock:

• Unit is in Mode 1 - power operation
• Reactor power is 99 %
• Turbine generator output - 1000 MWe
• Electricity production since the beginning of the year: 2 789 487 MWh

Marek Sviták
Spokesman of the ČEZ Group
Nuclear Power Plant Temelín