05000260/LER-1981-021-03, /03L-0:on 810507,HPCI Gland Seal Condenser Upper Head Gasket Began Leaking During Automatic Reactor Shutdown Sys Initiation.Caused by Head Gasket Stretched Out of Place Due to Overpressurization of Condenser Tube Side

/03L-0:on 810507,HPCI Gland Seal Condenser Upper Head Gasket Began Leaking During Automatic Reactor Shutdown Sys Initiation.Caused by Head Gasket Stretched Out of Place Due to Overpressurization of Condenser Tube Side

ML19346A265
Person / Time
Site:	Browns Ferry
Issue date:	06/01/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19346A264	List: 05000260/LER-1981-021, Forwards LER 81-021/03L-0 05000260/LER-1981-021-03, /03L-0:on 810507,HPCI Gland Seal Condenser Upper Head Gasket Began Leaking During Automatic Reactor Shutdown Sys Initiation.Caused by Head Gasket Stretched Out of Place Due to Overpressurization of Condenser Tube Side
References
LER-81-021-03L, LER-81-21-3L, NUDOCS 8106050521
Download: ML19346A265 (2)

LER-1981-021, /03L-0:on 810507,HPCI Gland Seal Condenser Upper Head Gasket Began Leaking During Automatic Reactor Shutdown Sys Initiation.Caused by Head Gasket Stretched Out of Place Due to Overpressurization of Condenser Tube Side

Event date:
Report date:
2601981021R03 - NRC Website

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EVENT OESCRIPTiON AND PROSA8LE CONSEQUEvCES h PTTI,l During automatic reactor shutdown. when the HPCI system was initiated. the HPCI PTT1 I gland seal condenser upper head gasket began leaking. The HPCI was removed l

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l o I 41 i from service to replace the gasket.

(T.S. 3.5.E.1)

There was no' danger to the I

l o i s i I health or safety of the public. Redundant systems were available and operable.

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CAUSE OESCRIPTION AND CORRECTIVE ACT!ONS h l l i l ;j l overpressurization of the tube side of the HPCI gland seal condenser caused the i

LLLiJ lhend casket to stretch out of place.

The casket was roolaced. Graham Manufactur h 1 1

1. l l Company neoprene gasket; pressure, 130 psi, normal opertting pressure, 60 psi.

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'1%nnessee */ alley Authority Form BF-17 Browns Fr.rry Nuclear Plant BF 15.2 0/24/81 LER SUPPLEMENTAL INFORMATION B FRO 260_/ ni n9, Technical Specification Involved 3.5.r:1.(2)

Reported Under Technical Specification _6.7.2.b (2)

Date of Occurrence s/7/81 Time of Occurrence __2306 Unit 2

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Identification and Description of Occurrence:

Unit 2 HPCI was removed frcm service to replace HPCI gland seal condenser head gasket.

Conditions Prior to Occurrence:

Unit i refueling outage Unit 2 at 59%

Unit 3 at 55%

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

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

Apparent Cause of Occurrence:

Overpressurizing tube side of HPCI gland seal condenser.

Analysis of Occurrence:

There was no danger to the health or safety of the public, no release of activity, no damage to the plant or equipment, and no resulting significant chain of events.

Corrective Action

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

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Failure Data:

BFRO-50-260/76016W, 74017W, 74024W; 296/81019.

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W,1 During automatic reactor shutdown. when the HPCI system was initiated. the HPCI g i gland saal condenser upper head gasket began leaking. The HPCI was removed l

IoI41 i from service to replace the gasket.

(T.S. 3.5.E.1)

There was no danner to the I

lois! l health or safety of the public. Redundant systems were available and operable.

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M 33 40 el 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Iiloi l Overpressarization of the tube side of the HPCI cland seal condenser cause-i the l

LLJ.>J lhead casket to stretch out of place.

The easket was reolaced. Graham Manuf acturirur I ICompany neoprene gasket; pressure. 150 psi, normal operating pressure, 60 psi.

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IiiiI l Special test will be initiated to monitor piping pressures to determine cause of l

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'Tannessee Valley Authority Form BF-17 Browns Ftrry Nuclear Plant BF 15.2 3/24/81 LER SUPPLEMENTAL INFORMATION B FRO 260,/

2, n,3 Technical Specification Involved 3.5.E.1.(2)

Reported Under Technical Specification _6.7.2'.b (2)

Date of Occurrence s/7/81 Time of Occurrence J06 Unit 2

Identificein and Description of Occurrence:

Unit 2 HPCI was removed from service to replace HPCI gland seal condenser head gasket.

Cc,nditions Prior to Occurrence:

Unit I refueling outage Unit 2 at 59%

Unit 3 at 55%

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

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

Apparent Ca'Ase of Occurrence:

Overpressurizing tube side of HPCI gland seal condenser.

l i

Analysis of Occurrence:

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

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

Corrective Action

Replaced upper head gask.ac.

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

l Failure Data:

l B FRO-50-260/ 76016'n', 74017W, 74024W; 296/g1019, l

• Reten tion : Period - Lifetime; Responsibility - Document Control Supervisor

• Revision :

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