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PSA level 1 Kozloduy NPP units 1-4 (Item H)

 
PSA level 1 Kozloduy NPP units 1-4 (Item H)

Description

Beneficiary Organization Details

Kozloduy NPP:
http://www.kznpp.org

Project Aims

The project objective was to perform an assessment of the Greifswald PSA applicability to Kozloduy, to prepare reliability studies of some safety systems (high pressure safety injection, confinement spray, auxiliary feedwater system) and suggest accident sequences to be considered for probabilistic pressurised thermal shock (PTS) evaluation and severe accidents (SA).

Project Results

  • The applicability of the Greifswald PSA to Kozloduy was evaluated and results were used in establishment of the list of Kozloduy NPP plant specific initiating events to be considered in the Kozloduy PSA. It was concluded that Greiswal PSA has a little applicability to Kozloduy NPP and plant specific PSA studies were needed;
  • Fault trees have been constructed for the selected high pressure safety injection, confinement spray and auxiliary feedwater systems. These reliability models could further be integrated in a plant specific PSA for Kozloduy NPP;
  • Interrelation amongst PSA, PTS and SA has been investigated and recommendations issued on how to address this issue for Kozloduy NPP.

The start and end dates of the project as specified above are indicative only.

Further Project Results

Further information on the project results could be sought from the beneficiary organizations.


General Information

Title: 
PSA level 1 Kozloduy NPP units 1-4 (Item H)
Programme: 
PHARE
Budget year: 
1991
Countries: 
Bulgaria
Types of activities: 
Design safety
NPP: 
Kozloduy
Installation types: 
VVER 440-230
Duration (months): 
282
Contractors: 
Westinghouse
Sub-contractors: 
Energoproject, Ltd
Status: 
Completed
Old reference: 
PH/91(H)
Effective contract date: 
01/01/1992
Closure date: 
01/01/1993