ML19257A897: Difference between revisions
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e | e ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 INAPPROPRIATE SEISMIC ANALYSIS OF UHI PIPING NCR CEB 79-36 10 CFR 50.55(e) | ||
ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 INAPPROPRIATE SEISMIC ANALYSIS OF UHI PIPING NCR CEB 79-36 10 CFR 50.55(e) | |||
FINAL REPORT Description of Condition The seismic analysis of record for the 12-inch UHI piping in unit 2, from the gas to the water accumulators, is the unit 1 analysis since the piping is opposite hand. However, the building which houses the unit 2 UHI piping is physically different from the unit 1 building. | FINAL REPORT Description of Condition The seismic analysis of record for the 12-inch UHI piping in unit 2, from the gas to the water accumulators, is the unit 1 analysis since the piping is opposite hand. However, the building which houses the unit 2 UHI piping is physically different from the unit 1 building. | ||
This requires the use of a different seismic response spectra in the piping analysis for unit 2. | This requires the use of a different seismic response spectra in the piping analysis for unit 2. | ||
| Line 26: | Line 24: | ||
Safety Implications Had this condition gone uncorrected, the safety-related UHI piping could have been adversely affected during a seismic event. | Safety Implications Had this condition gone uncorrected, the safety-related UHI piping could have been adversely affected during a seismic event. | ||
Corrective t.ction The unit 2 piping will be reanalyzed using the appropriate seismic response spectra. Any required hardware modifications will be com-pleted before unit 2 fuel loading. | Corrective t.ction The unit 2 piping will be reanalyzed using the appropriate seismic response spectra. Any required hardware modifications will be com-pleted before unit 2 fuel loading. | ||
1707 282 3 L2-5001099 | 1707 282 3 L2-5001099 84l>}} | ||
Latest revision as of 20:57, 3 January 2025
| ML19257A897 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 01/02/1980 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | |
| Shared Package | |
| ML19257A896 | List: |
| References | |
| NCR-CEB-79-36, NUDOCS 8001090362 | |
| Download: ML19257A897 (1) | |
Text
e ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 INAPPROPRIATE SEISMIC ANALYSIS OF UHI PIPING NCR CEB 79-36 10 CFR 50.55(e)
FINAL REPORT Description of Condition The seismic analysis of record for the 12-inch UHI piping in unit 2, from the gas to the water accumulators, is the unit 1 analysis since the piping is opposite hand. However, the building which houses the unit 2 UHI piping is physically different from the unit 1 building.
This requires the use of a different seismic response spectra in the piping analysis for unit 2.
This discrapancy'was overlooked in the original seismic analysis.
Safety Implications Had this condition gone uncorrected, the safety-related UHI piping could have been adversely affected during a seismic event.
Corrective t.ction The unit 2 piping will be reanalyzed using the appropriate seismic response spectra. Any required hardware modifications will be com-pleted before unit 2 fuel loading.
1707 282 3 L2-5001099 84l>