05000296/LER-1980-015-03, /03L-0:on 800512,3B RHR Pump Cooling Water Flow Determined Inadequate Per TS 3.5.B.1(2) & 3.5.BB.5.Caused by Apparent Restriction in Cooling Water Piping.Exchanger Removed & Flushed

/03L-0:on 800512,3B RHR Pump Cooling Water Flow Determined Inadequate Per TS 3.5.B.1(2) & 3.5.BB.5.Caused by Apparent Restriction in Cooling Water Piping.Exchanger Removed & Flushed

ML18025A916
Person / Time
Site:	Browns Ferry
Issue date:	06/10/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18025A914	List: 05000296/LER-1980-015, Forwards LER 80-015/03L-0 05000296/LER-1980-015-03, /03L-0:on 800512,3B RHR Pump Cooling Water Flow Determined Inadequate Per TS 3.5.B.1(2) & 3.5.BB.5.Caused by Apparent Restriction in Cooling Water Piping.Exchanger Removed & Flushed
References
LER-80-015-03L-02, LER-80-15-3L-2, NUDOCS 8006170512
Download: ML18025A916 (2)

LER-1980-015, /03L-0:on 800512,3B RHR Pump Cooling Water Flow Determined Inadequate Per TS 3.5.B.1(2) & 3.5.BB.5.Caused by Apparent Restriction in Cooling Water Piping.Exchanger Removed & Flushed

Event date:
Report date:
2961980015R03 - NRC Website

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8 60 61 DOCKET NUMBER 60 69 EVENT DATE 74 75 REPORT DATE 80 EVFNT DESCRIPTION AND PROBAeLE CONSEOUENCES Qlo

~os I Upon completion of the flow test on 3B RRR pump seal heat exchanger, it was determined that the cooling water flow was inadequate per'TS 3.5.B.l (2) and I

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Redundant pumps 3A, 3C, and 3D were operable.

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The heat exchanger was removed, the cooling water lines flushed, and the unit performed normally.

A system flushing evaluation is being perfonaed~

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DISCOVERY DESCRIPTION

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.Tennessee Valley Authori Browns Ferry Nuclear Plant LER SUPPLEMENTAL INFORMATION Form QP-.l 7 BF 15. 2 1/10/79 BFRO 9 /

1 Technical Specification Involved 3.5.B.l(2) and 3.5.B.5 Reported Under Technical Specification 6 7.2 B-2 Date of Occurrence 5/~?/80 Time of Occurrence Unit 3

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Identification and Description'of Occurrence:

Upon completion of the flow test on the 3B RHR pump seal heat exchanger, it was determined that the cooling water flow was inadequate per tech.

spec.

Conditions Prior to Occurrence:

Unit 1 96%

steady state operation Unit 2 - 97%

steady state operation Uni.t 3 100% steady state operation Action specified in the Technical Specification Surveillance Requirements met d~i 3A, 3C, and 3D RHR pumps proved operable.

A~arear Cause of Occurrence:

Restriction in the cooling water line upstream and/or downstream from the heat exchanger.

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

Corrective Action

Heat exchanger was

removed, coo'ling water lines flushed, and the unit performed normally.

Flushing evaluation being performed.

Failure Data:

N/A

r-Retention:

• Revision:

eriod - Lifetime; Responsibility - Administrative Supervisor