ML20108E045

Rev 4 to Procedure HNP-2-2092, Seismic Switch Tripped

ML20108E045
Person / Time
Site:	Hatch
Issue date:	03/10/1983
From:	GEORGIA POWER CO.
To:
Shared Package
ML20100P367	List: ML20100P364 ML20108E043 ML20108E045 ML20108E049 ML20108E057 ML20108E061 ML20108E066 ML20108E071 ML20108E074 ML20108E092 ML20108E098
References
HNP-2-2092, NUDOCS 8412140165
Download: ML20108E045 (2)

Text

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HATCH NUCLEAR PLANT g\\

PROCEDURE O

Seismic Switch Trigged PROCEDURE TITLE HNP-2-2092 PROCEDURE NUMOER Operations RESPONSIBLE SECTION SAFETY RELATED (

)

NON-SAFE'Y RELATED ( X)

APPROVED APPROVED REV.

DESCRIPTION DEPT.

PLANT DATE HEAD ER 4

Page 1 j

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0412140165 841129 PDR ADOCK 05000321

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APPROVAL PROCEDURE PeO E.1. HATCH NUCLEAR PLANT HNP-2-2092 See Title Page a6 *

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rd 1 of 1 See Title Page SEISMIC SWITCH TRIPPED A.

CONDITION The Unit 2 seismic alarm located on panel 2H11-P657 is received.

B.

ACTION 1.

Unit two alarm (annunciated by 2L51-NO22 or 2L51-NO24) indicates the Unit 2 building has experienced an acceleration equal to or. greater than the operating basis earthquake (OSE).

2L51-NO22 actuates at i.054g vertical, i

.08g longitudinal and i.089 transverse.

2L51-NO24 actuates at i.063g vertical, i.18 longitudinal and i.178g transverse.

Check seismic acceleration play-back recorder on Panel H11-P701 to determine magnitude of tremor.

a.

Begin plant shutdown per HNP-2-1025 (acceleration).

b.

Monitor plant operating parameters for abnormalities.

c.

Conduct visual surveillance of plant structures for abnormalities.

d.

Refer to HNP-4858 and HNP-1-2092.

e.

Notify Plant Management.

f.

Refer to HNP-4420 for notification of an unusual event.

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