ML20064B817

/03L-0 on 780906:Loss of Methyl Iodide Removal Efficiency for a Ebfs Train. Cause Unknown

ML20064B817
Person / Time
Site:	Millstone
Issue date:	10/02/1978
From:	Mccann W NORTHEAST UTILITIES
To:
Shared Package
ML20064B812	List: ML20064B809 ML20064B817
References
LER-78-022-03L, LER-78-22-3L, NUDOCS 7810110129
Download: ML20064B817 (1)

Text

LICENSEE EVENT REPORT c ,cCr4 TROL block: l i

l 'l l l l lh (PLEASE PRINT cR TYPE ALL RE2UIRE3 INFIC.MATI!N)

.e i I c i rUCENSEE lIr lhCODE i s 191@lo lo I lo in in In I. In in in l@la IUGENSE 25 26

,1 ilTYPE il il@l 40 I

57 CAT Sg l@

7 8 9 14 15 . UCENsENUMsER CON'T LO_Li J ."'u% LLJ@l 01 s l o l o in l a I, 68la l@ln 63 lo in* Ie 17 le l@l ilREPORT EVENT OATE 74 75 nl al 'l vi el@

CATE 80 7 _8 60 41 OOCKET NUMSER ~

EVENT DESCRIPTION ANo pro 8 ABLE CONSEQUENCES h.

FO TTl I An enclosure building filtration system'(EBFS) charcoal sarele indicated a methyl

- l  !

gi iodide removal efficiency of approximately 85% for the "A" EBFS train. Technical I Specification 4.6.5.1.b.3 requires a removal efficiency >/= 90L A sample taken i 50 gj i O , i on the "B" EBFS train indicated on efficiency of 91L The "A" EBFS train charcoal i O . l bed was replaced and the system returned to service. Similar occurrence: 1 i

0 7 l LER 78-1/IP-0 submitted on 1/3/78 I

O a i

• cE'E #^TE cO sNCiEE courosEur cOCE sWsi"Oo'E sEYOE Qj l S l H i@ y@ O @ I F l I l L l T I E l R I@ -lZ l@ [Z_j 14 19 20 7 8 9 10 13 12 13 EVENT YEAR RE ORT O CODE .

L O ,a=ER/ROl 71 al 1--J Inl9191 1/l in 13 i Lt._] L_] La_I 32 21 22 23 24 26 27 3 a 30 31 N AC 0 ONP NT M O HOURS SS 1 For 8. SUPPL ER MA UFAC RER LA_j@l34 XI@ [35 Zj@ [Z_j@ l01010101 L!Lj@ lYl@ [A_j@ lMl31315l@*

36 37 40 el 42 43 44 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O I The cause of the loss of efficiency is nnt knnwn at thh timo. A backuo charcoal l f

E I sample has been taken from the "A" EBFS train beds and is beino sent to the tn<tinn

, 2 l laboratory for a failure analysis. The results of the backuo sanole and any further i I

yl corrective action will be addressed in an update report followino receipt of the

, analysis.

80 7 3 g

% POWER OTHER STAT US DIS Rv DISCOVERY OESCRiPTION STA NA l l B l@l Surveillance charcoal sample l ITTB1 '

LE_J@' l 1101 Ol@l " " " " "

Adriviry cO0TEur eRELEasE LOcArion On RELEASE @

RETE 4sE AuOumrOr Activity @I l l

[Lj@l NA fitsliz_]

NA eERsoudt Ex,0sdAEs nuusER tvet OEsCRieriom @ l ITTTl l o l o l 01@l Z I@l NA l

,ERso~~Etm2v'4Es l NuveER l

@ l01010l@] OEsCRieTiON@ NA 30 I

F S 9 11 12 T PE OEsCR PT ON NA l 7

i 9 1 9 INl@l to 80 2 O itsur

[][j @OE l CRipTION NA I Illllllllll1II es se so .

r-e. gg to

• UU PHONE: 203-447-1791 g N4u '

= 7tL911 bof PRYARER 1A -

PDA Moca, gst-3 34 s 7 t zst W --- .-

,