ML19340D831

LER 80-040/03L-0:on 801130,discovered Continuous Environ Air Samples at Sample Station AT2.2 Not Being Drawn.Caused by Main Fuse Blowing Out.Entire Station Replaced & Electrical Surge Suppressor Installed

ML19340D831
Person / Time
Site:	Vermont Yankee
Issue date:	12/24/1980
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19340D823	List: ML19340D822 ML19340D831
References
LER-80-040-03L, LER-80-40-3L, NUDOCS 8101050433
Download: ML19340D831 (1)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSloN LICENSEE EVENT REPORT LER 80-40/3L CONTACL SLCCK: l l l l l I I (FLEASE PRINT OR TYM AL', REQUIRED INFORMATION) lo 113 9l l VILICENSEE

' Tl VlCODE Yi Sl ll@l 0 l 0 l - l 0L; CENSE 14 15 l 0 lNUMSER 0 l 0 ] O l -l 0l 0 26l@l4LICENSE 25

!1!1l1l1l@l TYPE N 57 J A T 54 l@

CCN'T I l011I schACE IL @l015l0l010l2I7I1 @l1l1131Ol8lOl@lll 2l2l4l 8l Ol@74 30 l

7 4 so si coCxETNuMsER sa es Ev ENT c ATE 75 AEPORT OATE EVENT DESCRIPTICN ANC PRC8A8LE CCNSECUENCES h l Io i2l l During weekly Environmental Air Sample Collections on 11-30-80, it was discovered l

[ojaiI that a continuous sample was not being drawn at Sample Station AT2.2. Subsequently l lo64l l this station was found to be inoperable on 12-8-80 and 12-9-80. Technical Specif1- l 10 i s i I cations Table 3.9.1 requires that continuous air sampling be performed. Low plant i l o is i I release levels were monitored during this period and past experience has indicated i 10 ! 71 l that these levels are undetectable bv environmental air sampline. Previous similarI Io!di l occurrences were reocrted as RO 80-28/3L and LER 78-19/3L. I S0 7 9 9 SYSTE M CAUSE CAUSE COMP. VALVE CODE CCCE SUSCOCE COMPONENT COCE SU8CC CE SUSCCCE loist I 8 I a l@ Lxj@ l z l@ l z I z I z I z j z l z l@ l z l@ Lz_j @

7 8 9 to 11 12 IJ 18 19 20 SEQJE NTI AL OCCURRENCE RE* CAT REVIS3CN EVENT YE A R A E*CRT NO. CCCE TYPE NO.

@ y"tga g no ,,,. l21 8l22Ol l-l 23 l0l4l0l 24 ;6 l/l 27 l0l3l 29 29 lLl 30 l-l 31 l 0l JJ EN AC C 0 P T ME HOURS SB 1 PCR B. St., ppt, MANUFAC RER

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44 47 CAUS2 Ot:.1,031PTION AND CORRECTIVE ACTICNS h '

l i i o I p.e main fuse for the station blew out in all three cases and at varving lengths intoi titiiithe sample cycle. No apparent cause was noted for the 1st and 2nd events and when 1 ii,2; Ithe 3rd event was discovered the entire station was replaced and an electrical surgel I i 6 31 l suppressor was installed in the electrical suoply to the station. Surge suppressionI li14I twill be installed on all air sample stations to improve reliabilitv. I 80 7 8 9

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S %PCWER CTHER STATUS C RY DISCOVERY DESCRIPTICN I1 15 l [,u,Lj@ l ol ol ol@l NA I Ls.J@l Technician Observation i A VITY CC TENT AMCUNT OF ACTIVITY LOCATION OF RELEASE l1 l6IAELEASED@CF AELEASE(,Z NA jh! l l NA 80 l

7 3 3 to 11 44 45 PERSONNEL EXPCSURES NUMBER TYPE CESCRIPTICN 4 l1I7Il0l0!0l@[g,j@l NA l PERSONNEL INJU IES NUuSER OESCRIPTICN NA l It t a3l 3l 0 l 0 l 0 l@l12 7 11 80 LCSS 08 CR CAMAGE TO PACILITY ,

TveE CESCPipTrCN I1 19 l [kij NA 80 l

? 3 3 to CE CR'PTICN 8,

1. SSUE i:  ! og 9l l N fhl NA l lIIl l1!IIIIIIi 7 13 63 69 80 3 NAME OF *REPARER W. P. Murphy PHCNE: (802) 257-7711 {

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