Summary Report for Conduct of Kozloduy NPP Stress Tests

“Kozloduy NPP” PLC
SUMMARY REPORT
for Conduct of Kozloduy NPP
Stress Tests
1 GENERAL DATA FOR KOZLODUY NPP
1.1 KOZLODUY NPP SITE GENERAL DESCRIPTION
1.1.1 Location
Kozloduy Nuclear Power Plant has been constructed in the north-west of Bulgaria, on the
right bank of the River Danube. It is located 5 km to the east of the town of Kozloduy and 200 to the
north of Sofia, the capital of Bulgaria.
The site is located in the northern part of the first not flooded terrace of the river Danube and
has average height of +35.00 m. The whole site area is about 2.2 km 2 , and with the circulation and
service water supply channels it reaches 4.5 km 2 . The 30 km zone around the site has no military or
large industrial facilities. The area consists predominantly of flat landscapes with no protected and
sensitive areas in the immediate vicinity of the plant. The climate is moderate continental with cold
winters and hot summers, with one of the lowest annual rainfall in the country, section 2 from
[7],[8].
1.1.2 Nuclear facilities and general plant facilities in the site
1.1.2.1 Nuclear Facilities
In Kozloduy NPP site 6 units have been built with total electric power of 3760 MW, with
pressure water reactors, spent fuel storage facility (SFS) and spent fuel dry storage facility (DSFS).
1.1.2.1.1 Units 1 and 2
Under the Decision of the Council of Ministers of 20.12.2008 units 1 and 2 were declared
facilities for radioactive waste (RAW) management, which along with the necessary mobile
property were given to State Enterprise "Radioactive Waste" (SE “RAW”), which is an independent
trade union. On 18.10.2010 NRA issued licenses of SE “RAW” for operation of Units 1 and 2 as
radioactive waste management facilities to be decommissioned, and terminate the licenses of
Kozloduy NPP for operation of the first two units in operational mode - status “Е”.
There is no nuclear fuel remaining at the site of Units 1 and 2.
1.1.2.1.2 Units 3 and 4
Units 3 and 4 are designed with VVER-440 type reactors. The fuel of both units is removed
from the core and is stored on the lower shelf in the fuel storage pools (SFP) near the reactor. The
primary and secondary circuits are filled with conservation solutions to inhibit corrosion processes.
Availability for core refuelling is maintained in case of an accident with not compensated
leakage from SFP.
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