ML19270F298

LER 79-001/03L-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

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: ML17173A569 ML19270F298
References
LER-79-001-03L, LER-79-1-3L, NUDOCS 7902060219
Download: ML19270F298 (1)

Text

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EVENT DESCRIPTICN AND Pf3& TABLE CONSEQUENCES h l During steady state operation the torus level increase'dto -1 inch, due to re- l ol2l See RO#79-2/01T-0. Immediate operator action o,3 l petitive starts of the HPCI turbine. l o ia jwas to pump the excess torus water to the hotwell, restoring water level to -3.5" i This event had minimal safety significance since i o s l which is within specifications.

o c 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 1

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CAuse cEscRIPTIOM AND CCRRECTIVE ACTIONS 3 ;o l Increase in the torus water level was determined to be an inadequate procedure. The [

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IIPCI surveillance wilbbe changed to include a " CAUTION" statement so the torus level I will not exceed specifications during repetitive starts of the HPCI turbine. No I

, ;3 l further action is necessary. l 1

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