05000369/LER-1981-006-03, /03L-0:on 810202,leaking Seal Discovered on RHR Pump.Caused by Improperly Loaded Spring Which Holds Seal Faces Together.Seal Replaced

/03L-0:on 810202,leaking Seal Discovered on RHR Pump.Caused by Improperly Loaded Spring Which Holds Seal Faces Together.Seal Replaced

ML20008E901
Person / Time
Site:	McGuire
Issue date:	03/04/1981
From:	Ouellette R DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20008E893	List: 05000369/LER-1981-006, Forwards LER 81-006/03L-0 05000369/LER-1981-006-03, /03L-0:on 810202,leaking Seal Discovered on RHR Pump.Caused by Improperly Loaded Spring Which Holds Seal Faces Together.Seal Replaced
References
LER-81-006-03L, LER-81-6-3L, NUDOCS 8103100484
Download: ML20008E901 (2)

LER-1981-006, /03L-0:on 810202,leaking Seal Discovered on RHR Pump.Caused by Improperly Loaded Spring Which Holds Seal Faces Together.Seal Replaced

Event date:
Report date:
3691981006R03 - NRC Website

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12.:i I Prior to initial fuel loadine an RHR pump was discovered to have a leaking

1. 3;pi seal. The pump was inoperable and required compliance with the action state m i ment of Technical Specification 3.9.8.2.

Since all the fuel is new and no 13.. ; I heat was being generated, the loss of the RHR pump did not affect or endanger 9

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MCGUIRE NUCLEAR STATION INCIDENT REPORT Report Number: RO-369/81-06 Report Date: February 11, 1981 Occurrence Date:

February 2, 1981 Facility:.McGuire Unit 1, Cornelius, North Carolina Identification of Occurrence: ND Pump 1A of the Residual Heat Removal System was Declared Inoperable due to a Mechanical Seal Problem condition Prior to Occurrence: Initial Fuel Loading, Mode 6 Descriptibn of Occurrence:

ND Pump'1A was discov'ered to-have a leaking seal prior to the start of fuel loading. When fuel: loading was complete, the pump was taken out of service to repair the-seal.

During this' time, the pump was inoperable and required

. compliance;with-the action statement of Technical Specification 3.9.8.2.

A

. new seal was installed and the pump was verified to be operating satisfactorily.

. Apparent Cause of Occurrence:

The ND_ Pump lA Seal had-previously been changed.. When the pump was disassembled this time, it >was discovered that the' spring.which holds the seal. faces together was_not properly loaded. - It could not be determined if the original seal had been' installed improperly or if the spring had changed position during normal pump operation.

Analysis;of Occurrence:

During :a ' normal. refueling both ND pumps are tequired to be. operable to provide single failure assurance of core cooling. 'This procedure was being followed

~

- during the initial-fuel loading, as"well.

However, since all the fuel.is new

. and' no heat is being generated, there is no. real need -for.the 10 pumps.

There-

' fore, 'the lossiof ND Pump 1A.did.not af fect or endanger _ the health and safety Lof

- the public.D

.' Corrective Action:

4 1The-leak :g. seal was replaced as soon as 'possible af ter fuel loading was complete.

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