05000237/LER-1979-001-03, /03L-0 on 790103:torus Level Increased to -1 Inch, Due to Repetitive Starts of HPCI Turbine.Increase in Torus Level Determined to Be Result of Inadequate Procedure.Hpci Surveillance Procedures to Be Amended

/03L-0 on 790103:torus Level Increased to -1 Inch, Due to Repetitive Starts of HPCI Turbine.Increase in Torus Level Determined to Be Result of Inadequate Procedure.Hpci Surveillance Procedures to Be Amended

ML19270F298
Person / Time
Site:	Dresden
Issue date:	01/31/1979
From:	Korchynsky M COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A570	List: 05000237/LER-1979-001-03, /03L-0 on 790103:torus Level Increased to -1 Inch, Due to Repetitive Starts of HPCI Turbine.Increase in Torus Level Determined to Be Result of Inadequate Procedure.Hpci Surveillance Procedures to Be Amended
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7902060219
Download: ML19270F298 (1)

LER-1979-001, /03L-0 on 790103:torus Level Increased to -1 Inch, Due to Repetitive Starts of HPCI Turbine.Increase in Torus Level Determined to Be Result of Inadequate Procedure.Hpci Surveillance Procedures to Be Amended

Event date:
Report date:
2371979001R03 - NRC Website

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_j' l During steady state operation the torus level increase'dto -1

inch, due to re-l ol2l o,3 l petitive starts of the HPCI turbine.

See RO#79-2/01T-0.

Immediate operator action l

to pump the excess torus water to the hotwell, restoring water level to -3.5" i

o ia jwas l which is within specifications.

This event had minimal safety significance since i

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l the 0.5 inch excess in water level did not significant1v affect the pressure sup-I oI7 l pression capability. This event has occured previously at Dresden. (Unit 2 RO#75-51).I i T. s._ re_q ';_luve l m i n t, i mi between -1.5 and -Ll5"_at in n/"-

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33 06 31 40 41 42 43 44 47 JJ CAuse cEscRIPTIOM AND CCRRECTIVE ACTIONS 3 ;o l Increase in the torus water level was determined to be an inadequate procedure. The [

IIPCI surveillance wilbbe changed to include a " CAUTION" statement so the torus level I 3

will not exceed specifications during repetitive starts of the HPCI turbine. No I

, ;3 l further action is necessary.

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8 9 t*E THOD OF F t.CII I T Y 30)

DISCOVEHY DESCHIPTION STATOS

• & POWE R OTHER STA TUS DiSCOVE H Y NA l

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DESCRIPTION

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