ML022460169
| ML022460169 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 08/29/2002 |
| From: | FirstEnergy Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FOIA/PA-2002-0229 | |
| Download: ML022460169 (4) | |
Text
Risk-Infuormed IEvauatuion F3
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CD -~
C-1.
C0 Expected Number of Leakine CRDM Nozzles.
Davis-Davis-EBURI MRP Besse Davis-Besse Upper Median EPRI MRP Shape Besse EFPY Projection Weibull Parameter Refueling EFPY Corrected Proiection 1.5 Shape
'Model Modified Outage to 600F 1.5 Shape Parameter Parameter Proiection Scale PrParameter 10 10.56 12.91 5.0 1.0 9.5x10"5 0.02 11 12.33 15.07 6.3 1.3 1.7xO"3 0.36 12 14.06 17.18 7.6 1.6 1.9x10"2 4.00 13 15.81 19.32 8.9 1.9 0.17 28.3 16.37 20.00 9.3 2.0 0.32 43.7 cm!
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10 p.
MA771A NIAk AHIM ADr.I Cae BCP~redicted Leaks for various Weibull Leak Initiation Models LZ
0ON3d4 W,4t 10 0.1i goo geiw lIMOJb "sesseiis eseo ISJOMeiss
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Risk-Infuormed Evuluution Conditionail Core lhmagei/Rlealse Probaiit!y
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Davis-Besse conditional core damage probability for a 0.1 ft2 medium LOCA is 2.7 x 10-3.
SConditional large earlv elease probability for a medium LOCA is about 4 Qx60' 7 The conditionall.,,,
b ility -for this analysis is less thana-pp!ed inthePSA because the medium LOCA rangeiethe PS-A s 0002 ft2 - 0.5 W.
.FATIONVC FENOC LIV
Resulis
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17 lpr Upper (95%)t./'
EPRI MR1P Constant Initiation
.Proe.ti-n Shape Parameter Frequency 1.5 Shape Modified Scale Parameter Parameter Bounding Bestm Bounding
.. 'Best B
did e
EEst B
Bmate.....,
Estimate CDF 1.8 E-6 9.9 E-8 1.1 E-6 6.3 E-8 3.3 E-7 1.9 E-8 LERF 2.6 E-9 1.5 E-10 1.7 E-9 9.4 E-11 4.9 E-10 2.8 E-11 Person REM 0.16 9.2 E-3
.11 5.9 E-3 3.1 E-2 1.7 E-3 FENOC
-I.