ML20043H172
| ML20043H172 | |
| Person / Time | |
|---|---|
| Issue date: | 06/14/1990 |
| From: | Kaufer B NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Lam P NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| Shared Package | |
| ML20043H173 | List: |
| References | |
| AEOD-T90-08, AEOD-T90-8, NUDOCS 9006220128 | |
| Download: ML20043H172 (1) | |
Text
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gyp MMI MEMORANDl] FOR:
Peter La], Acting Chief Reactor Operations Analysis Branch Division of Safety Programs Office for Analysis and Evaluation of Operational Data FROM:
Barry Kaufer, Reactor Systems Engin-eer Reactor Systems Section GE & CE Reactor Operations Analysis Branch Division of Safety Programs Office for Analysis and Evaluation of Operational Data
SUBJECT:
TURBINE BYPASS MALFUNCTIONS Enclosed is our Technical Review on Turbine Bypass Malfunctions. This review documented occurrences of tarbine bypass (steam dump) system malfunctions, inadvertent opening or c Nsing of turbine bypass valves, and the resultant effect on plant startep, operation, and shutdown.
Searches on the NUDOCS and SCSS database revealed 140 events relating to this issue. The study revealed that most bypass system failures result in a plant transient involving actuation of engineered safety features (ESF) systems.
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'Further analysis showed that the potential risk of core damage due to these types of events is low. Therefore, no further AEOD action is recommended at l
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Barry Kaufer, Reactor Systems Engineer Reactor Systems Section GE & CE L
Reactor Operations Analysis Branch l
Division of Safety Programs Office for Analysis and Evaluation of Operational Data o
Enclosure:
As stated i
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