atw - International Journal for Nuclear Power | 05.2019

atw Vol. 64 (2019) | Issue 5 ı May
296
Brokdorf
REPORT
Operating sequence in 2018
100
90
80
70
60
50
40
30
20
10
Electrical output in %
January February March April May June July August September October November December
In the year 2018 nuclear power plant Brokdorf (KBR) was on the grid
with an availability factor of 84.70 % in total 7,937 operating hours.
Gross generation for the year under review amounted to
80 10,376,751 MWh. Also in 2018, the thermal reactor power was limited
to a maximum of 95 % with a coolant temperature reduced by 3 K
60 of nominal power due to the specifications of ME 02/2017 “Increased
oxide layer thickness on fuel rod cladding tubes of fuel assemblies”.
40
Due to high summer temperatures, temporary reductions in output
were necessary in the months of July to September in order to
20
comply with the water law permit.
100
0
Planned shutdowns
On 1 April 2018 the plant was shutdown for the 30 th refuelling and
annual major revision:
The revision included the following priorities:
80
pp
Reactor
Offload of the reactor pressure vessel.
Oxide layer measurement and
60
visual inspection of fuel elements.
40
Inspection of control elements.
Ultrasonic test, reactor pressure vessel,
20
bottom part.
pp
Main coolant pump YD40 Ring exchange of e-motor.
0
Inspection of the axial bearing.
Replacement mechanical shaft seal.
pp
Feed water system Pressure testing.
pp
Coolant
Works on pump stationary head VE30/40.
Works on main coolant water
Positionierung: channel VA10-30.
pp
Turbine Bezug, links, Standard untenservice.
Inspection primary water cooler
of generator.
pp
Transformers VGB: HKS6K Exchange 30 % of transformers
atw: 100 60 CS12, 0 0 CS21, CT31.
pp
Batteries Exchange, redundancy 1
100
X = 20,475 Y = 95,25 B = 173,5 H = 38,2
Unplanned shutdowns and reactor/turbine trip
On 2 May 2018, the generator was disconnected from the grid and
shut down to remove a seal leakage at a non-return flap of the steam
generator blowdown system. On 5 May 2018, after completion of the
repair, a malfunction in the turbine control at one of two electrohydraulic
converters (EHU) occurred during start-up of the plant.
After clearing of the failure the main synchronisation took place on
6 May 2018.
On 12 August 2018 the plant was disconnected from the grid for
repairing the speed monitor selection circuit of the turbine protection
system.
Power reductions above 10 % and longer than for 24 h
In the period from 12 to 13 October 2018, power reduction was carried
out for the inspection and repair of a connecting slide valve between
a force-locking basin and a pump antechamber of the secured
secondary cooling water system as well as for the detection and removal
of a condenser pipe leakage in the turbine condenser.
In addition, load reductions were carried out in order to implement
the grid-supporting power control in accordance with the specifications
of the mission control centre.
Delivery of fuel elements
During the reporting year 28 fuel elements were delivered.
Waste management status
By the end of the year 2018 33 loaded CASTOR © cask were located at
the on-site intermediate storage Brokdorf.
Report
Operating Results 2018