ML20035B115

Recommends That Concern Identified During Resolution of GSI 106 Re Potential Impact That Tank May Have on Diesels During Seismic Event Be Identified in Ltr to Licensee for Review During IPEEE

ML20035B115
Person / Time
Site:	Duane Arnold
Issue date:	03/25/1993
From:	Mccracken C Office of Nuclear Reactor Regulation
To:	Hannon J Office of Nuclear Reactor Regulation
Shared Package
ML20035B116	List: ML20035B115 ML20035F123 ML20035F131
References
REF-GTECI-106, REF-GTECI-NI, TASK-106, TASK-OR NUDOCS 9303310154
Download: ML20035B115 (1)

Text

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j Docket No. 50-331 MEMORANDUM FOR:

John N. Hannon, Director Project Directorate III-3 Division of Reactor Projects III/IV/V FROM:

Conrad E. McCracken, Chief l

Plant Systems Branch Division of Systems Safety and Analysis l

SUBJECT:

500 GALLON PROPANE TANK AT DUANE ARNOLD - DOCKET 50-331 i

As part of the resolution for GSI-106 research has raised a concern associated l

with the subject tank. The concern relates to the potential impact that.this tank may have on the diesels during a seismic event.

If a seismic event were to occur, a loss of off site power could occur as result of the failure of the ceramic insulators on the station transformer.

This demand would start the diesel generators. The seismic event could also cause a failure of the propane tank. The tank failure could result in a loss of the diesel generators and result in a station blackout.

It is postulated that the failure and damage to the diesels would be related to ingestion of propane through the combustion air intakes.

Enclosed is a copy of research's memorandum dated February 11, 1993, which identified the concerns associated with the subject tank.

Based on our review, it is our recommendation that this concern be identified in letter to the licensee.

The licensee should be requested to review the RES contractor's findings and address this potential vulnerability as part of their Individual Plant Examination of External Events (IPEEE). Additionally, they should assure themselves that they are meeting their licensing basis EDG operability requirements.

If you should have any question, please contact Patrick M. Madden at 504-2854.

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Conrad E. McCracken, Chief Plant Systems Branch Division of Systems Safety and Analysis

Enclosure:

l-As stated i

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