ML102250511
| ML102250511 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/13/2010 |
| From: | Xcel Energy |
| To: | Atomic Safety and Licensing Board Panel |
| SECY RAS | |
| Shared Package | |
| ML102250494 | List: |
| References | |
| 50-282-LR, 50-306-LR, ASLBP 08-871-01-LR-BD01, RAS 18400 | |
| Download: ML102250511 (36) | |
Text
11
Prairie Island Nuclear Generating Plant NORTHARD EXHIBIT 45
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Human Reliability Analysis Seismic Risk Assessment Pipe Whip Screening Significance Flood Propagation Analysis HELB Environment &
Habitability Pipe Break Frequency
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14 14 PINGP Unit 1 Turbine Bldg Seismic Flooding Risk (Total = 2.45E-6/yr) 0.0%
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.30 -.50 Peak Ground Acceleration, g Percent of Seismic CDF 0.12 g = Design Basis Earthquake
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19 19 Does the target have a cast iron component that could fail?
Is moving pipe thicker than target pipe?
Has the interaction been geometrically analyzed, concluding target pipe damage is minimal?
Will not contribute significantly, does not warrant further investigation.
No Yes Can not conclude target pipe damage is minimal.
No Yes Is the target less than 4 NPS?
No 1
2 3
4 5
6 Has the interaction been evaluated in CCHELB SDP?
Is moving pipe normally isolated/
deenergized?
Yes No No Yes Yes No Yes AES analysis supports no target damage. Excluded from interaction set.
Not considered a piping interaction.
Excluded Exclude from SDP Exclude from this SDP
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22 22 Influence of Challenges & Environment on HEP 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 0
15 30 45 60 75 90 105 120 135 150 165 180 195 Time Available, min Human Error Prob.
HD HELB - Isolate CL and FP Breaks Isolate Random CL Break SPAR-H HEP - HELB SPAR-H HEP - Random
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