05000260/LER-1981-031-03, /03L-0:on 810701,RHR Pump Room Cooler 3-A Developed Water Leak.Caused by Broken Silfos Joint on 1/4-inch Vent Line.Joint Resoldered

/03L-0:on 810701,RHR Pump Room Cooler 3-A Developed Water Leak.Caused by Broken Silfos Joint on 1/4-inch Vent Line.Joint Resoldered

ML20009F667
Person / Time
Site:	Browns Ferry
Issue date:	07/22/1981
From:	Holder G TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009F657	List: 05000260/LER-1981-031, Forwards LER 81-031/03L-0 05000260/LER-1981-031-03, /03L-0:on 810701,RHR Pump Room Cooler 3-A Developed Water Leak.Caused by Broken Silfos Joint on 1/4-inch Vent Line.Joint Resoldered
References
LER-81-031-03L-01, LER-81-31-3L-1, NUDOCS 8107310393
Download: ML20009F667 (2)

LER-1981-031, /03L-0:on 810701,RHR Pump Room Cooler 3-A Developed Water Leak.Caused by Broken Silfos Joint on 1/4-inch Vent Line.Joint Resoldered

Event date:
Report date:
2601981031R03 - NRC Website

text

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the 3-A RHR pump room coolcr developed a l

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,q gater leak and was isolated for repair, making 3-A RHR pump inoperable.

3 l3 and D pumps were already inoperable because the U-l torus was drained, thus three l

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2 cross connection became inoperable.

(Cre T.S. 3.5.3-l 3 j, J i RHR pumps located on the unit There was no danger to the health or safety of the public, no redundant systems, j 3 i., j l 12)

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Gene Holder R~CNE NAME OF PAEPAPER

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'5cnnest,ce Vallev Authority BF 15.2 P,rowns Ferry N'nclear Plant G/04/81

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LMit SUI'PLEMENTAI, INFORMATION Technical Specification In co!ved 3.5.3.12 R! itf > 50 2g. / 31031.

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!tcparted Under Technical Specification 6. 7 2.b,(2),

j Darc of Occurrenec 7/1/81 Time of Occurrence 0500 Unit 2_.

Identification and Description of Occurrence:

The 3-A RHR pump room cooler developed a water leak and was isolated for repair, The Unit 1 B and D pumps were already inoperable making 3-A RHR pump inoperable.

because the unit 1 torus was drained, thus three RHR pumps located on the unit 2 cross connection became inoperable.

t *otolif ion:. I'rior to Ucrurrence:

Unit 1 in refueling outage.

Unit 2 at 99%.

Unit 3 at 96%.

l Action specified in the Technical Specification Surveillance Requirements met Describe.

49. to. inoperable equigment.

t Met surveillance requirements of T.S. 4.5.3.12.

Apparent Cause of Occurrence:

The soldered joint on a one quarter inch vent line broke, causing a water leak.

Anpl,vsis, of fjecurrence 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.

Currective Action.

The joint was resoldered, 'the leak repaired and the system returned to service within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This is considered a random failure, and no further recurrence control is required; l':ninre Data:

H et en t ion :

l'ery ni - 1.ifetime; Responsibility - Document Control Supervisor None

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