Summary Report for Conduct of Kozloduy NPP Stress Tests

“Kozloduy NPP” PLC
SUMMARY REPORT
for Conduct of Kozloduy NPP
Stress Tests
These sets have developed instructions for actions for response to emergency conditions in
SFP in modes “MAINTENANCE OUTAGE” and “REFUELLING” [in. №РБОК-0, „ACTIONS
FOR RESPONSE TO EMERGENCY CONDITIONS IN SFP (TG21B01,02,03) IN MODES
“MAINTENANCE OUTAGE” И “REFUELLING”].
For conducting of training full-scale simulator of units 5 and 6 (FSS 1000) is used which
maintained in accordance with reference – unit 6, according to requirements of the regulatory
authority and standards set in ANSI/ANS-3.5-1998.
Two types of training is delivered to the operators of the MCR - refreshment and
introductory for licensing.
Introductory training for licensing of SRO, NUDE, CD NPP and RPh has various durations
according to: „Regulation on conditions and procedure for enhancing of professional qualification
and procedure on issuing licenses for specialized training and certificates for authorization for use
of nuclear energy”.
Refreshment training of the operators of the MCR is held according to preliminary approved
schedule twice annually with durations of 5 training days. Training scenarios are developed on the
basis of analysis of events which occurred at various NPPs, considering probability of such failures
at units 5 and 6. Training is held by the licensed instructors. During the training on FSS 1000, the
teams are trained to work on SBEOP to bring the reactor installation into steady-state and safe
condition.
For severe accident management at Units 5 and 6 guidelines were developed for severe
accidents (SAMG), which follow the format of SBEOP. Criteria were defined for transfer from
SBEOP to SAMG.
SAMGs for Units 5 and 6 were developed on the basis of system analysis of the processes
and phenomena during severe accidents [148]. The purpose of system analysis is to define the basis
for knowledge of processes and phenomena, occurring at progress of severe accidents, all the
technical means (equipment and systems), which allow for reaching of the set purposes in the
course of severe accident management (SAM).
Strategies defined for severe accident management are the following:
· Pressure reduction in the primary circuit;
· Pressure reduction in the secondary circuit;
· Water injection to the primary circuit;
· Water injection to the secondary circuit;
· Pressure reduction in the containment.
SAMG includes three step-by-step procedures at the MCR:
· SAMG-00 Loss of 6 kV sources of electric power supply;
· SAMG-01 Initial actions at severe accident;
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