ML19309F418

Updated LER 79-052/03X-1:on 790928,containment Gaseous & Particulate Radioactivity Monitoring Sys Failed Due to Loss of Sampling Pump.Caused by Normal end-of-life Failure of Graphite Particles Depositing on Bearings

ML19309F418
Person / Time
Site:	Calvert Cliffs
Issue date:	04/25/1980
From:	Pence W BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19309F412	List: ML19309F411 ML19309F418
References
LER-79-052-03X, LER-79-52-3X, NUDOCS 8004290438
Download: ML19309F418 (1)

Text

5[ UPDATE REPORTgRf!ggTgg: 10/26/79 CoNrRot stoCo 1 1

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TvPE JC 7 LICENSEE CODE 15 Co N'T IoIiI 7 8 s "C WOl0 60 61 l 5101010 DOCKET NUMBER l311 17 @ 69l0 19EVENT 66 12DATC IR 17 to @ lnREPORT 74 75 la 17 DATEIn 19 83 ' Ol@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h t o l 21 l At 1620 the Unit I containment caseous and particulate radioactivity monitorino I lo tai i systems failed due to a loss of the samolino cump (T.S. 3.4.6.1). The spare I lo 141 I pump was started at 1645 on 9/28/79, returning the gaseous and particulate I lo is) i radioactivity monitoring systems to service. The containment sump level I io is i l alarm sys;em remained operable during the event. LER 78,49 (U-1) and LER 78-51 1 I

Io I 7 I I (U-2) describe similar events.

I 10181I 7 8 9 DE CODE SUSC E COMPONENT CODE SL8 CODE S ODE lo19l IB IB l@ l El@ l Fl@ l P lU i M l P l X I:Lj@ [3_j @ [2_j 18 19 20 7 8 9 10 11 12 13 CCCURRENCE REPORT REVISION

._ SE QUENTI AL EVENT vf 4R REPORT NO. CODE TYPE NO.

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43 44 47 CAUSE oESCRIPTioN AND CORRECTIVE ACTIONS h li t o l i The cump seized durina operation. It was ramoved and renlaced with a snara n n- 1 li 13 j I It appears that graphite particles from the pump deposited on the bearinct cantino I i, i,,I seizure. This is a nomal end of life failure. No further corrective action is I I

l i i a l i deemed necessary. (Conde Pumo Fbdel a61.

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NAME oF PREPARER W. B. Pence pgays.(301 W o 4R1; {