Summary Report for Conduct of Kozloduy NPP Stress Tests

“Kozloduy NPP” PLC
SUMMARY REPORT
for Conduct of Kozloduy NPP
Stress Tests
Table 4.2-1: Wind load.
Standard wind
Computational
value w m [kN/m 2 Load factor g
]
f
value [kN/m 2 ]
Current norms 0,48 1,4 0,67
Extreme value 1,24 1 1,24
Snow load:
Table 4.2-2: Snow load.
Standard snow
Computational
value s t [kN/m 2 Load factor g
]
f
value [kN/m 2 ]
Current norms 1,2 1,4 1,68
Extreme value 1.6 1 1.6
For purposes of this assessment extreme value of snow load at snow cover 80 cm (3%
recurrence for past periods, as of 1977) and volumetric weight of sleet precipitation 2,0 kN/m3 (by
Eurocode 1 ), which is St = 1.6 kN/m2 is conservatively assumed.
Impacts from high temperatures
Maximum temperature during the warm half year t ew =34 0 C as required by regulations.
Absolute highest outdoor air temperature recorded at the site is 43,3 0 С and it is considered
extreme.
Impacts from low temperatures
extreme.
Maximum temperature during the cold half year t ew =-20 0 C as required by regulations.
Absolute lowest outdoor air temperature recorded at the site is – 26,6 0 С and it is considered
4.3 DESIGN BASIS
The following climate characteristics underlay the design bases of the nuclear facilities of
Kozloduy NPP site:
· Average annual temperature +11,6°С
· Т av for July +24,3°С
· Т av for January -1,5°С
· Т mах absolute +43,0°С
· Т min absolute -29,0°С
· Average annual relative air humidity - 70%
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