Summary Report for Conduct of Kozloduy NPP Stress Tests

“Kozloduy NPP” PLC
SUMMARY REPORT
for Conduct of Kozloduy NPP
Stress Tests
In emergencies, when implementation of lifesaving activities are required the limit of 100
mSv may be exceeded. For example, actions to prevent core damage. In case of emergency
activities involving very high risk, they are performed by volunteers from the emergency personnel
of the emergency teams. Furthermore, the head of the enterprise is obliged to submit to the Minister
of Health and the Chairman of the NRA the statement accompanied by a list of staff who performs
the operations, their written consent, time and place of operations, the opinion of the health or other
medical establishment and any other information about the circumstances and the measures taken.
For the work of emergency personnel of the MCR (ECR) and AMC the design solutions
provide habitability in the event of a radiological or nuclear accident. These solutions ensure
protection against ionizing radiation, isolation from the environment, air purification from
radioactive purification higher than the external atmospheric pressure, air-conditioning, etc. to
ensure long-term safe stay of the personnel.
6.1.3.2 Factors which can prevent management of accident of units 3 and 4
6.1.3.2.1 Impact on accessibility and habitability of the MCR and SCR, measures to prevent or
control the situation
Control and management of the technological processes is provided by two main control
rooms (one per each unit). in the technical design separated layout is adopted of the main control
rooms which ensure:
· high fire safety of the rooms;
· higher reliability in control of each unit;
· possibility of better cable lying.
Besides design envisions two Standby control rooms (SCR), one per each unit, at which the
units can be shut down in case of accident situation at the main control rooms.
of the unit.
At the MCR control is envisioned of all the main and auxiliary mechanisms and components
At the MCR control is performed for operating auxiliaries transformers 15,75/6,3 kV,
switchgears 6 kV with standby power supply to 6 kV busbars, unit operating and standby
transformers 6/0,4 kV, elements of the grid for reliable power supply to the units.
At the MCR the following communications are provided:
· two-way loudspeaking communication of duty operator and the shift of the operating
personnel;
· command loudspeaker and alarm in the main production premises and in area of the
power plant.
At the MCRs of the units conditioning systems are mounted for maintaining required
conditions for uninterrupted work of the operators. This is combined with maintaining and setting at
the MCR of the so called “working” are for the MCR operators.
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