05000281/LER-1982-052-03, /03L-0:on 820812,charging Pump Lubricating Oil Cooler 2-CH-E-5C Found to Be Losing Svc Water Flow, Increasing Bearing Temps on 2-CH-P-1C.Caused by Sticking Float in Svc Water Flow Indicator.Sticking Float Freed

/03L-0:on 820812,charging Pump Lubricating Oil Cooler 2-CH-E-5C Found to Be Losing Svc Water Flow, Increasing Bearing Temps on 2-CH-P-1C.Caused by Sticking Float in Svc Water Flow Indicator.Sticking Float Freed

ML20027B326
Person / Time
Site:	Surry
Issue date:	09/10/1982
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027B323	List: 05000281/LER-1982-052, Forwards LER 82-052/03L-0 05000281/LER-1982-052-03, /03L-0:on 820812,charging Pump Lubricating Oil Cooler 2-CH-E-5C Found to Be Losing Svc Water Flow, Increasing Bearing Temps on 2-CH-P-1C.Caused by Sticking Float in Svc Water Flow Indicator.Sticking Float Freed
References
LER-82-052-03L-02, LER-82-52-3L-2, NUDOCS 8209200283
Download: ML20027B326 (2)

LER-1982-052, /03L-0:on 820812,charging Pump Lubricating Oil Cooler 2-CH-E-5C Found to Be Losing Svc Water Flow, Increasing Bearing Temps on 2-CH-P-1C.Caused by Sticking Float in Svc Water Flow Indicator.Sticking Float Freed

Event date:
Report date:
2811982052R03 - NRC Website

text

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CAUSE OESCRIPYlON ANO CORRECTIVE ACTIONS Iiioi1 The loss of service water flow throuch 2-CH-E-SC was caused bv a stickinc f1nnt in I ii iiji a service water flow indicator. The stickine float was freed by eveling rho 1

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5b-281 REPORT 30:

82-052/03L-0 EVENT R_TE:

08-12-82 TITLE C7 THE EVENT:

2-CH-E-5C Inoperable 1.

DE52IPTION OF THE EVENT:

With Unit 2 at 100% power, increasing bearing temperatures were noted on 2-CE-P-1C.

Further investigation revealed that the 2-CH-E-5C was losing serrice water flow. This is contrary to T.S.3.2.B.1 and 3.3. A.5 and is rep:rtable per T.S.6.6.2.b(2).

2.

PRC3ABLE CONSEQUENCES and STATUS of RED ~NDANT EQUIPMENT:

The charging pump lubricating oil cooler provided cooling to the lubricating oil and the charging pump bearings.

Since neither the lubricating oil or the chs ging pump bearings experienced excessive heating, and "C" charging pump re::ained operating, the health and safety of the public were not affected.

3.

CAGE:

Initially, increasing charging puro lubrication oil temperatures were att-ibuted to air blockage in oil cooler 2-CH-E-5C.

Upon further investigation, a sticking float in a flow indicator was found to have restricted service water fl::w and caused the increase in lubrication oil temperature.

4.

IMEDIATE CORRECTIVE ACTION:

The heat exchanger was vented in an attempt to increase service voter flow.

5.

SUE 5EQUENT CORRECTIVE ACTION:

The increasing lutricating oil tecperature was correctly attributed to a sticking float in a service water flow indicator. The Service Water discharge isolation valve for cooler 2-CH-E-5C was cycled and the sticking float was freed.

No:-restricted service water flow was established through the cooler and charging pu:3 bearing temperatures returned to normal.

6.

AC* ION TAKEN TO PREVENT RECURRENCE:

None.

7.

GE5ERIC IMPLICATIONS:

None.

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