Summary Report for Conduct of Kozloduy NPP Stress Tests

“Kozloduy NPP” PLC
SUMMARY REPORT
for Conduct of Kozloduy NPP
Stress Tests
The system includes: storage facility hall (the part located above the fuel storage
compartment) and SFP consisting of: 4 four compartments for storage of SNF and preliminary
corridor, connecting all compartments of the storage facilities.
1.4.1.4 Systems and facilities for containers loading in SNF
The functional purpose of the system includes receiving, reloading and transportation for
processing of container filled with SNF assemblies [26].
Handling equipment and facilities consist of:
· Bridge crane 160/32/8t;
· Bridge crane 16 t;
· Refuelling machines МПХОГ-440/1000;
· Facilities and equipment for transportation and storage of SNF of VVER-440 and
VVER-1000 reactors.
· Facilities and equipment for handling operations with container “CONSTOR
440/84”.
1.4.2 Systems Ensuring or Supporting the Fundamental Safety Functions
1.4.2.1 Reactivity control
1.4.2.1.1 Systems ensuring criticality of SFP
The location of the assemblies in the casing, distance between the assemblies (assemblies
pitch) ensure sub-criticality of the media of at least 5% in normal and accident conditions of
operation.
1.4.2.2 Heat Removal from the pools in SFS to the Ultimate Heat Sink
The main ultimate heat sink from all nuclear installations located in Kozloduy NPP site
including SFS is Danube River.
1.4.2.2.1 Heat removal logics
Connection with the ultimate heat sink from SFP spent fuel residual heat source is by means
of cooling water in heat-exchangers, provided from the ІІ or ІІІ system for reliable service water
supply of units 3 and 4.
1.4.2.2.2 Availability of the heat removal logics and measures to extend the systems operability
According to the design the SFP cooldown system refers to normal operation systems. To
increase its reliability, the system has been designed to fulfil part of the requirements placed to the
safety related systems.
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