ML19262A380

Deficiency Rept Re Diaphragm Sucked Over Suction Screen Which Cut Off Flow During Draining of Condensate Storage Tank 1B.Condenser Vacuum Collapsed Suction Screen Which Punctured Diaphragm.New Screen Designed

ML19262A380
Person / Time
Site:	Three Mile Island
Issue date:	03/15/1974
From:	Arnold R METROPOLITAN EDISON CO.
To:
Shared Package
ML19262A379	List: ML19262A380
References
NUDOCS 7910260699
Download: ML19262A380 (1)

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?.iETROPOLITAN EDISON CCCPANY POST OFFICE coX G2 R E AclNG, P2*,'.CYLV ANI A 1CCC3 TELEPHCNE 213 - CNC21 March 15, 197k Dr. D. F. Inuth, Director Directonte of Ee;;ulatcry C'peraticns Cffice cf 3e.;ulation U.S. etcaic Energy Consissica Washingtca, D.C. 2C5k5

Dear Dr. Knuth:

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. E 6 U A' A' .7".l*Mn' cd.' 1' You were notified en February 13,197h, of a situation vnich may be considere d reportable under 10 C.~P 5C.55(e), "Condationc cf C;nstruction".

This situation related to Ccndensate Storage Tank 1E Diaphrag2.

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Descri; tion of Incident During ec plete draininc of Condensata Ctorage T1nk lE to the condenser hotvell, the diaphracn was sucked over the euction screen cutting off flow. The condenser vacuun acting on the diaphragn ecllapsed the cuction screen ':hich resulted in the diaphragm being punctured in several places.

Corrective Action Taken The tank va; optned to inspect the sucticn screen which was fcund to be collapsed and a new cereen was designed by the Architect Engineer which will prevent the diaphra.en fron biccking the suction and also prevent the diaphragn from beinc punctured. The diaphrag= vaa repaired and the tani put back in service.

The new designed suction screen vill also be installed in Condensate Starace Tank 1A to preclude this tyce of incident frcn occurring. As a further precaution, an operating limit has been i posed by Metropolitan Elicon Cc pany to preclude the diaphragm frc cein6 in contact with the suction screen.

Very truly yours ,

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