ML20136G371
| ML20136G371 | |
| Person / Time | |
|---|---|
| Site: | Perry, Grand Gulf, 05000000, Shoreham |
| Issue date: | 11/21/1985 |
| From: | Thompson H Office of Nuclear Reactor Regulation |
| To: | Asselstine, Palladino, Roberts NRC COMMISSION (OCM) |
| References | |
| TASK-AS, TASK-BN85-091 BN-85-091, NUDOCS 8511220333 | |
| Download: ML20136G371 (2) | |
Text
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4665 UNITED STATES
,8 NUCLEAR REGULATORY COMMISSION o
E I
WASHINGTON, D. C. 20656 i
k.....
NOV 211986
-W4
-M Docket Nos.:
-322 and 50-440 sy-WA
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MEMORANDUM FOR: Chairman Palladino Commissioner Roberts Comissioner Asselstine Commissioner Bernthal Comissioner Zech FROM:
Hugh L. Thompson, Jr., Director l
Division of Licensing, Office of Nuclear Reactor Regulation f
SUBJECT:
EMERGENCY DIESEL GENERATOR OVERSPEED CONDITION OCCURRENCE l
AT GRAND GULF NUCLEAR STATION (BOARD NOTIFICATION NO.85-091)
I In accordance with procedures for Board Notifications, the following in-l formation is being provided directly to the Comission. The appropriate boards and parties, for all facilities with TDI diesel generators are being informed by a copy of this memorandum. This information is relevant to all facilities that have diesel generators manufactured by TDI including Perry and Shoreham, which are currently before the Commission.
An overspeed condition was experienced with the Division 1 Transamerica DeLaval. Inc. emergency diesel generator (TDI/EDG), at the Grand Gulf l
Nuclear Station, on November 6,1985. The Grand Gulf EDG was subjected
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to an overspeed condition for approximately 15 seconds before it could be shut down and did sustain significant damage during this event.
The NRC/TDI Task Group representatives are investigating the incident to determine if there are generic implications which could affect other nuclear facilities utilizing the TDI/EDG and the Woodward governor. Although the specific cause(s) is not yet known, it is thought to be associated with a malfunction of the Woodward governor and overspeed trip mechanism.~ This event occurred after some preventive maintenance of the EDG was performed.
The Grand Gulf licensee, assisted by FaAA, Woodward and TDI personnel, is
'j in the process of evaluating the damage sustained by the EDG. The governor was removed and sent to Woodward for inspection and testing. Preliminary information regarding the bench testing performed by Woodward indicates that the governor failed to respond to an overspeed condition because of inadequate governor lube oil levels.
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Event followup is continuing in the offices of NRR, I&E and Region II to determine the significance of this event, its applicability to other licen-sees and applicants for operating licenses, and the necessity for issuance of an I&E Information Notice and/or Bulletin.
We will advise the Commission and the Boards of results of those investiga-tions as they proceed.
High L. Thompson J r.
rector Di v sion of Licensin 01 fce of Nuclear Reactor Regulation cc: SECY(2) i OPE OGC EDO Parties to the Proceeding ACRS(10)
ASLB's for: Midland Shearon Harris Comanche Peak ASLAB's for: Shoreham Perry
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