05000296/LER-1981-019-03, During Shutdown,When HPCI Sys Initiated,Upper & Lower HPCI Gland Seal Condenser Head Gaskets Were Blown.Caused by Overpressurization of Tube Side of HPCI Gland Seal Condenser.Gaskets Replaced

During Shutdown,When HPCI Sys Initiated,Upper & Lower HPCI Gland Seal Condenser Head Gaskets Were Blown.Caused by Overpressurization of Tube Side of HPCI Gland Seal Condenser.Gaskets Replaced

ML20004D635
Person / Time
Site:	Browns Ferry
Issue date:	06/05/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004D626	List: 05000296/LER-1981-019-03, During Shutdown,When HPCI Sys Initiated,Upper & Lower HPCI Gland Seal Condenser Head Gaskets Were Blown.Caused by Overpressurization of Tube Side of HPCI Gland Seal Condenser.Gaskets Replaced
References
LER-81-019-03L, LER-81-19-3L, NUDOCS 8106090601
Download: ML20004D635 (2)

LER-1981-019, During Shutdown,When HPCI Sys Initiated,Upper & Lower HPCI Gland Seal Condenser Head Gaskets Were Blown.Caused by Overpressurization of Tube Side of HPCI Gland Seal Condenser.Gaskets Replaced

Event date:
Report date:
2961981019R03 - NRC Website

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~4 60 68 OOCK E T NUM8E R (wl 63 EVENT DATE 14 75 REPOR T D ATE 15 0 6VEN T DESCRIPTION AND PROB ABLE CONSEQUENCES h [n1.'l l During automatic reactor shutdown, when the HPCI system was initiated. the unoer I

gg l and lower HPCI gland seal condenser head gaskets were blown. The HPCI was removed I

i n I.i l l from service to replace the gaskets. There was no danger to the health or safety i

I g o j., i l of the public. Redundant systems were operable. Previous similar events: B FRO l l g l 260/74016W, 74017W, 74024W, and 74028W.

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40 di 42 43 44 47 CAUSC DESCRIPTION AND CORRECTIVE ACTIONS h I i I o ! LOverpressurization of the tube side of the HPCI stland seal condenser caused the l

((_TJ Lgaskets to stretch out of place. Caskets were replaced. Graham Manufacturine I

,,i j l Company neoprene gasket; pressure class, 150 psi (design); normal operating pressure, I i,i q l 60 psi.

Special test will be initiated to monitor piping pressures to determine 1

liiil l cause of overpressurization.

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Tennessee Valley Authority Form BF-17 Erowns Ferry Nuclear Plant BF 15.2 3/24/81 LER SUPPLEMENTAL INFORMATION BFRO 296 / 81019 R1 Technical Specification Involved 3.5.E.l(2)

Reported Under Technical Specification 6.7.2.b.2 Date of Occurrence 4/23/81 Time of Occurrence 0830 Unit 3

Identification and Description of Occurrence:

Unit 3 HPCI inoperable to replace gland seal condenser gaskets.

Conditiens Prior to Occurrence:

Unit i refueling outage Unit 2 at 99%

Unit 3 scram due to low reactor water level.

Action specified in the Technical Specification Surveillance Requirements met due to inoperable equipment. Describe.

Requirements of T.S. 3.5.E.1(2) were met.

l t pparent Cause of Occurrence:

Overpressurizing gland seal condenser (tube side).

Analysis of Occurrence:

l There was no danger to the health or safety of the public, no release of activity.

l no damage to the plant or equipment, and no resulting significant chain of events.

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Corrective Action

Replaced head gaskets. Instrumentation will be installed to monitor piping pressures to determine cause of overpressurization.

Failure Data:

BFRO-50-260/74016W, 74017W, 74024W, and 74028W.

• Retention : Period - Lifetime; Responsibility - Document Control Supervisor i

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• Revision :

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