Safety Evaluation Report of Barakah Units 1 and

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SER Summary-CLA Barakah Units 1&2
designed to meet Seismic Category I requirements, includes the Reactor Containment
Building and the Auxiliary Building, together with a shared Compound Building between the
two units.
The Reactor Containment Building is a pre-stressed, concrete cylindrical structure with a
hemispherical dome. A safety-related reinforced concrete base mat is common among the
structures of the nuclear island. The interior wall surface and basemat area of the
containment is lined with steel for leak-tightness. The Reactor Containment Building
completely encloses the reactor system and acts as a biological shield and a barrier to the
release of radioactive material. The interior of the Containment Building is
compartmentalized for equipment missile protection and radiation shielding during
maintenance work activities. Access to the Containment Building is through an equipment
hatch and personnel airlocks.
The Auxiliary Building houses the main control room, emergency diesel generators, and fuel
handling and storage area for each reactor unit, as well as various safety system
components and containment penetration areas. The Auxiliary Building is a
rectangular-walled structure constructed of reinforced concrete situated on the common
nuclear island base mat.
The turbine island includes the Turbine and Switchgear Buildings. The Turbine Building
houses the main turbines and the generator.
The Compound Building provides access control to both units, plus a hot machine shop, and
a radioactive waste treatment and waste drum storage/removal area.
Electrical Transmission System
The electrical power to be generated by Barakah Units 1 and 2 will be transmitted from the
station switchyard to the Emirates National Grid (ENG) interconnection. TRANSCO, a
subsidiary of Abu Dhabi Water and Electricity Authority, is responsible for operating the high
voltage power distribution system within the Emirate of Abu Dhabi.
The TRANSCO grid system supplies electrical power over 400 kV transmission lines at an
alternating current (AC) frequency of 50 Hz. Six offsite 400 kV transmission lines from the
grid will connect from three remote substations via overhead lines to the Barakah Units 1
and 2 switchyard for availability to station auxiliary loads. The 400 kV switchyard is
connected to the two station main transformers via underground buses and to the four
standby auxiliary transformers via underground cable.
3.4 Plant Description
The application states that each of the proposed Barakah Units 1 and 2 is a two-loop
pressurized water reactor (PWR) nuclear steam supply system supplied by KEPCO, rated at
4,000 MWt with a corresponding electrical output of approximately 1,390 MWe.
A summary of the information contained in the application on Barakah Units 1 and 2 plant
systems is provided in the paragraphs below.
Reactor
The reactor core within the reactor vessel is comprised of 241 fuel assemblies, 93 top-entry
control element assemblies, and 61 bottom-entry incore instrumentation assemblies. Each