ML19276F676

LER 1-77-98 on 771109:w/reactor in Run Mode,Rhr Snubber on Steam Condensing Line Found Inoperative.Caused by Water Hammer.Operators Instructed to Ensure RHR Heat Exchanger Is Isolated & Sys Is Filled & Vented

ML19276F676
Person / Time
Site:	Brunswick
Issue date:	12/05/1977
From:	Banks H CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19276F671	List: ML19276F676 NG-77-1365, Forwards LER 1-77-98
References
LER-1-77-98, NUDOCS 7904060428
Download: ML19276F676 (2)

Text

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0 VENT CESCOc?CN With the reactor at power, in the RUN mode, RHR snubber on the steam condencint line I

50 was found inoperative by an auxiliary operator.

(Technical Specification 3.5.J.2) c0 I

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AUSE CESCAi TCN The broken snubber was apparently caused by water hac

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Periodic Test 8.2.2, RHR l

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LER CONTINUATION -- RO #1-77-98 Facility: BSEP #1 Event Date 11-4-77 Corrective Action:

The snubber was replaced.

Action to Prevent Recurrence:

The operators have been cautioned to ensure the RHR heat exchanger is isolated and the system is filled and vented prior to starting RHR pumps. Filling and venting the RHR steam cor.densing piping has been covered in operator training. Parts are on c-der to repair the stern condensing valves that leak through and, :.? ow ste am to collect in the RHR piping.