ML20006D959
| ML20006D959 | |
| Person / Time | |
|---|---|
| Issue date: | 02/07/1990 |
| From: | Wegner M NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| To: | Rosenthal J NRC OFFICE FOR ANALYSIS & EVALUATION OF OPERATIONAL DATA (AEOD) |
| Shared Package | |
| ML20006D960 | List: |
| References | |
| AEOD-E90-01, AEOD-E90-1, AEOD-E905, NUDOCS 9002150308 | |
| Download: ML20006D959 (2) | |
Text
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WEMORANDUM-FOR: _ Jack E. Rosenthal, Chief AE00/E90-01 y
Reactor Operations Analysis Branch
? Division of' Safety Programs, AE00.
TERU:
Matthew Chiramal, Chief o
Engineering Section Reactor Operations Analysis Branch 1
Division of Safety Programs, AEOD-N
.FROM:
Mary S. Wegner, Reactor Systems Engineer
. Engineering Section Reactor Operations Analysis Branch j
Division of Safety Programs, AEDD
SUBJECT:
FAILURES OF ELECTRICAL SUPPLY AND POWER GENERATION EQUIPMENT WHICH DISRUPTED PLANT FUNCTION AT NUCLEAR-J POWER PLANTS 1
Enclosed is the subject engineering analysis. This study was initiated because of the occurrence of several events in early 1989 involving major electrical equipment or offsite power problems. The issues addressed in this re cern disruptions of normal station auxiliary alternating current (AC) port con-power supply caused by grid,. switchyard, and non-1E electrical system problems and major electrical equipment failures.
Failures addressed in this report include major equipment failures which is addressed in AE0D/E905, " Electrical Bus Bar Failures" and in on-going studies on main transformer failures and failure of the fast bus transfer scheme.
The operating experience, particularly maintenance surveillance and procedural problems, should be utilized by NRR in developing procedures for the upcoming electrical team inspections.
i Ip) l Mary S. Wegner, Reactor Systems Engineer l-Engineering Section L
Reactor Operations Analysis Branch in Division of Safety Programs L
Office for Analysis and Evaluation L
of Operational Data-
Enclosure:
As stated L
' Distribution:
PDR.._ ll Files MWegner MW1111ams HFaulkner CHaughney-L Centra MChiramal VBenaroya MTaylor BBrady
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EMORANDUM FOR: Jack E. Rosenthal, Chief AE00/E90-01 Reactor Operations Analysis Branch 4
Division of Safety Programs, AEOD THRU:-
Matthew Chiremal, Chief' Engineering Section Reactor Operations Analysis Branch Division.of Safety Programs, AE00 FROM:-
Mary S. Wegner, Reactor Systems Engineer Engineering Section Reactor Operations Analysis Branch Division of Safety Programs, AE00
SUBJECT:
FAILURES OF ELECTRICAL SUPPLY AND POWER GENERATION EQUIPMENT WHICH DISRUPTED PLANT FUNCTION AT-HUCLEAR POWER PLANTS Enclosed is the subject engineering analysis.
This study was initiated because of the occurrence of several events in early 1989 involving major electrical equipment or offsite power problems. The issues addressed in this re t con-
'cern disruptions of-normal station auxiliary alternating current (AC)por power supply _ caused by grid, switchyard, and non-1E electrical system problems and
. major electrical equipment feiluras.
Failures addressed in this report include major equip' ment failures which is addressed in AE00/E905, " Electrical Bus Bar failures and an on-going study on main transformer failures; failure of the fast bus transfer scheme which is being addressed in an on-going AE0D study; and various raintenance and surveil-lance problems which will be forwarded to the NRR group (DRIS/NRR) developing procedures for the upcoming electrical team inspections.
I Mary S..Wegner, Reactor Systems Engineer Engineering Section Reactor Operations Analysis _ Brt nch Division of Safety Programs-Office for Analysis and Evaluation of Operational Data
Enclosure:
As stated Distribution:
PDR MWegner MWilliams HFaulkner CHaughney E
Central File MChiramal VBenaroya MTaylor BBrady ROAB R/F JRosenthal TNovak CHeltemes Plam DSP R/F KBlack LSpessard EJordan Glanik i
ROAB:,0SP 00 ROAB:DSP:AEOD R0AB:DSP:AE00 MWegne MChiramall*
JRosenthal 11/0/8 11/g/89 11/ /89 L
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