PROBABILISTIC SAFETY ANALYSIS

The main objective of the project was the transfer of Western Probabilistic Safety Analysis (PSA) and External Events methodology and experience to the Russian Beneficiary. It concerned the level I of PSA. It enabled the Russian specialists to identify weak areas where improvements are needed, to assign priorities in a modification schedule and to verify the validity of the proposed modifications.

Summary:

Setting up Procedures and Guidelines for Development of a PSA-Level 1;
Providing necessary Software and Hardware (see below) Assistance in Review of Reliability Data most appropriate to be used in the VVER 440/V 230 Plant PSA;
Assist Russian Specialists and work together with them on Novovoronezh Unit 3 PSA;
Assistance in performing analysis of external events (natural and man-made events, internal fires, flooding, missiles, pipe whip) for the same plant.
Supply of tools:

3 HP Vectra VL2 4/50 Model 210 80486 DX2-50 MHz, 4MB RAM, 210 MB IDE-Hard disk, 3,5” FDD, Incl. DOS 6.2, Windows 3.1;
3 HP Vectra VL2 4/50 Model 340 80486 DX 2-50 MHz, 8MB RAM, 340 MB Hard disk, 3,5” FDD, MS-DOS 6.2, Windows 3.1;
6 Monitors;
1 HP Laserjet IV plus printer;
1 CANON NP 1215 photocopier;
License RISK Spectrum (5 copies);
Support of the above mentioned RISK Spectrum Licenses;
License of COMPBRNEA.
External event analysis:

Fire analysis;
Flooding analysis;
Missile impact analysis;
Pipe whip analysis;
Natural and Man-Made Events Analysis;
Interim/Final Report for the above analysis.
Internal event analysis:

Identification of initiating events and success criteria;
Collection of Reliability Data;
Accident Sequence Development;
System Analysis- Dependency Analysis;
Human Reliability Analysis;
Event Tree Quantification;
Importance, sensitivity and uncertainty analysis;
Interim/Final Probabilistic Safety Analysis Report.