ML19276F387

LER 79-003/03L-1 on 790118:flange Seal Gasket Leaked Excessively.Caused by Gasket Wear.Gasket Replaced

ML19276F387
Person / Time
Site:	Quad Cities
Issue date:	03/09/1979
From:	Tietz G COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19276F352	List: ML19276F351 ML19276F356 ML19276F387 ML19276F389
References
LER-79-003-03L, LER-79-3-3L, NUDOCS 7903290090
Download: ML19276F387 (1)

Text

U. S. P.UCLE AR REGU L AToRY Co'. *.11SSICN

> ; c c m. s LICENSEE EVENT REPORT

' PLEAsE PRINT CR TYPE ALL REQUIRED INFoRMATICN1

CNTRolsLcCx ! ,

l l } I

)@

Il1 ILIO lAlDI1!@!O u -

I 0 I0 I IO l0 mE~s wcce i 0l-l0 l0 10 a l@i4l1l1!1l1l@!

s .::' .: T +: a wcr x I@

, urE . :: C: w Ioa b 17 lo u!@l ao l ?"E?c nl I

? 7 3

$'s lLl@l a c:

d Si o 10101215 lh esl@IeO 31E .IlE'.T18

.

E- - 3ER

A TE AT c A rE EVE 77 DESCRIPTICN C.O n;3 A3_E 2C'.IEOCENCES h

- .: l While performing the Drywell Head Flange local leak rate test. It was determined the 1 j

3 .3 l flange seal gasket had a leak rate in excess of 30 SCFH and oossibiv in excess I

3 43 l of the Technical Specification 4.7.A.2.i.1 'imit for dcuble-casketed seals of i3 [ 36.72 SCFH.

I

'._ ij l Jl ' l 1

eiei i S:

8 9 COYP. VALVE SYSTE\t CAUSE CAUSE SUSCODE CC'.1PCNENT CCDE SUaC005 Suscc0E CODE COCE

.i 9 8

lSlD] @ lEl h lB lh l P l E l N l E l T l R Ih lC lh l Zlh 9 13 11 12 17 la 13 20 EV'S'ON SE OUE N TI AL OCCU A R E NCE PEFCRT CCCE TYPE *. O.

,,_ EVENT YE AR R EPCRT NO.

ggq ag 17 19 l l- l 0 l O l 31 l/l 10 l 3 l l Ll l-l l1 l

@ aE*o"7 23 24 2G 27 23 29 JJ JI JJ

,,_ 21 22 COV 'O'4 E N T ATT AC NU E NT NPRD* # AIVE COYP.

ACTICN TUTURE EFTECT SHUTOOWN SUBY1TTED FCRM bLb. SUPPU ER M A*.U F ACTUR E A CN7LANT MET' 00 HOURS TAKEN ACTION lCl@lZl@ l Zl@ 35 lZ lh l,0l0l0l0l 36 3d 40 l N Ih 41 lY lh dh 42 43 lC l1 lT l0 lh 44 47 33 34 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS o,e an rohru,r" l i i2 l The probable cause of the excessive leakaga was due tn y s L- a *

. ,i 17, 1979 the flange seal gasket was replaced. A second leak rate test was Oer4 r-ed I

,, j and the corrected leak rate was found to be 0.0 SCFH. 1 I

l3 I I

i L___ 30 8 9 uETNGO CF F Ac.;t t Tv CISCOV E R Y DlSCOVERY DESCR AT CN T4TUS . POWER OTHER STATUS NA l lBl@l Local Leak Rate Test l l'

3 3 l H l@ l 0l 0l 0lhl TO 12 13 44 43 46 8)

A C T.VI TY CONTE *;T LOC A! ION Oc ,9 E LE ASE DELEASEC OC RELEA E A'/OUNT OF ACTIVITY NA l NA l ir lZl@ Ql@l 1 O 11 44 43 d)

.w s=. . 'E L w:u u d

. I l 0 [ d'j"O o Sf2}Al"12" a a '

l 3 n i ., i3

.wa. Nn c.

n sur-En Dis;nPT!O'.h i i01010l2l v

u NA

-e,

... g y _,Tv g

, NA 1 :i '! Z iv:?-l S,

' ~ "

^

, . . s .R~ 790329009o i l l l !I IIiii 'if a __J NisaO ' ' NA G. Tie: , ,;.:

- 309-654-2241, ext. 247 1

.. m - -> E u A , > ..,