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

{{#Wiki_filter:5[ UPDATE REPORTgRf!ggTgg: 10/26/79 CoNrRot stoCo 1 1 I I I I I l@ 6

                                                                                                 <etEAsE rRiNT oR TvPE f.tt REcuiREo Nro u T o i            fSYY Y37 lo lil8 l9 M! nl            el    cl   NI      1l@l010 14 l-   1010101010 LICENSE NyV8ER l lo 10 l@l4 11LICENSE 25     26 11 11        Il l@l5 7 C IA T 58l@

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.

ca og

                @ ,a;g l217l9]                             l-l             l 0 5 12 l             l/l          10 13 I                 l X]           [31_]       11 l 22        23              24            26       27           28        29            30                          32 MANU ACTLpEn TAK N AC ON                  ONPLANT           MET                       HOURS 22        58 i             FO         8       SUPPLIE i33A l@l34Z l@                 W@ lZl@

35 36 l0101010l 37 40 [N j@ 41 INl@ 42 lAl@ l C 151211 {{ 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. I li l A l I 80 7 8 9 STA S  % POWER OTHER$TATUS Ol5Cov RY DISCOVERY DESCR:PTION Iiisll Fl@ l1l010l@l NA I LA.J@l ocarator ossarvatinn i ACTlvlTY CONTENT RELE ASED OP RELE ASE AMOUNT OF ACTivtT LOCATION OF RELEASE I I1 I6l [.Zj @ [J.j @l NA l l NA PERsOEEL ExPCsSEs NUuBER TvPE oEsCRiPTiON@

                                                                                                                                                              - .                  l W l 01 Ol Ol@l' Zl@l NA
                 ' PERSONNEL iN;UliEs NuuBER              eEsCRiPrioN@                                                                                                                              l lTal101OI01@!

7 8 9 11 12 NA

                                                                                                                                        ,                                     80
                 #5 "fs'"'A'ON '' " @

E NA ,I li l 91 7 8 9 I ZI@l10 8s ISSUE ITTTl I Nf@DE l CRiPTION NA I liIIIIi111IIII 7 8 9 10 68 69 80 3

                       ~

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