ML20197D165

/03L-0 on 781029:during Scram 2-78-14,2B21-NO24A Instru Switch 2 Failed to Actuate at Setpoint 111.6+/-3.6 Inches.Cause:Magnet on 2 Switch Had Metal Shavings on It. Instru Cover Was Loose & Shavings Entered Instru

ML20197D165
Person / Time
Site:	Hatch
Issue date:	11/08/1978
From:	Nix R GEORGIA POWER CO.
To:
Shared Package
ML20197D142	List: ML20197D165 PM-78-432, Forwards LER 78-061/03L-0
References
LER-78-061-03L, LER-78-61-3L, NUDOCS 7811210404
Download: ML20197D165 (2)

Text

{{#Wiki_filter:... [ (cormmt uloct: I l ; }_ 'l_ -l-

                                                          -l'                                @                     (PLEME PHtNT OR 1YPE ALL REOulnCD INFOHMAD0ff                                                      ,

1I I]ll -li_I

        *J       ALICLNSEE lit l Ll1H  _

CODI I 2 l@l o I o I o l Ih.toiCSt.I o 14 Ps I o I o I o I o_l fiUM601 h o I o l@W! 4Jul 1 11 11l11 l@l - .A UCL Pd,t 110't' bd I l' T ', 2 B-l$","$. [L_}@l 0 l 5 l 0 l 0 l 0 l 3 l 6 l 6 l@l 1 l OL2j 9 l 7 l 8 '@{ l l 1_[0_[3 l 7 l 8bJl@ 00 . bt tygti Hugpq u W u) LVtN1 UAlt .A6 74 HLPuill DAIL 'i?

        .tvrH f DESCHtPHON AND PHoHAHLL CONGLOVENCEG B-purinq scram 2-78-14, t he 2H21-ilo24A instrutrent switch !!c. - 2 failed to actuate a t a h                                   ,

l f! p .lsetpoint of 111.6 1 3.6 inches. Technical Specification 3.3.2-1 requires the setpoint l @ {to be less than or equal _ to ll7.9 but the setpoint was found at 119.8. There was no' - l

                                                                                                                                                                                                                +

( B leffect on the safe shutdown of. the plant nor on public health and safety. l  !!j ii'

                                                                                                                                                                                      ~

O L._  ! ih I] I !h

                                    ~

l II {;l l 89 LO i1 SYST EM CAUSE CAUSE CO\fP. VALVE , CODE CODE SUCCODE COstPONfffT CODE SU3CCDE SU3 CODE j B; ic 1 cl@ I Al@ I c l@ [I ll1 IS lT [R lU l@ [Sj@ lN Zl@ l 6 9 to il I? 13 nd _ 13 1 SEQUENTIAL OCCURRENCE H8 SORT RIVISION g g rno EVENT YC AR RE PORT NO. . CODE TYPE No.

        -@ lg&S 17                       ;' t 18 I                   l-l           10 l 6j]:                   lyl           _ [ 0l 3j
                                                                                                                                               ;9 lLl 30 l_l 31

[ OJ 32 22 13 24 26 21 ;G  ! E0"'ASYSE O'lil Nr sEE" nouns r ' ^MlTrE' rSI"S$s. "$N87I' > TAT [rIYEn !l  ! lElg[4HJg 33 s [33i. lg l3'aZl@ LI 3! IoI 43i l'i 45 l@ l42 'il@ l43til@ l44G I 018 lodi!@ iJ cAUSE DESCRIPTION AND CORRECTIVE ACTIONS h B Ifhe magnet on the t!o. 2 switch of 2B21-N02dA had metal shavings on it. The instrument I d B hover was innse and the shavinas had anparently entered the insirument when f t[; 3 ponstruction personnel were workino in the area. The metal shavinas were removed and l , p

                                                                                                                                                                                                                 'N E l procedures HilP-2-5281 -and HitP-2-3101 were nerformed and found satisfactory. This cover I                                                                                                                ,'

II L twas secured and all other instrument covers checked to prevent a reoccurrence (cont'd) ! :p ao es L 's'n'IT . rom n OTnEnsTATus @E:'cEr?v' DiscovEnv otsCniPnON @ i 3-@_J@ l0l0!Ol@] i:A l lAl@! Operator Observation -l-8 9 - 10 12 13 44 45 4G LO

                                                                                                                                                                                                                        ]'
       /,C liVl1Y CONTENT ftEL E A5f D OF REL E ASE-                                                                                                                      LOCATION OF Rett'A0E Dt_j6      9-
               @ l 7 l@l    10                    11 AMOUNT    NA             OF ACTIVITY
                                                                                                    #4 l
                                                                                                                    . 45 -
                                                                                                                            ' -J flA LO l

{ rtRLO?AEL EXF05VRES ' HUMM M 1YFt OCLCntP HON d ]l0l0l0l@lZl@[ 6-9. '11 1.' 13 flA D3 l f IItLO*AL L IN JUHICS Nus.ter n DE'>CHIPTION ' D8 l9 0101 Ol@[l? tA I  ; 1 11 - 00 W o=r^""" @ ilA ]; lZ -l@!

                                                                    ' '                                        7811210yo4 5                                                                           l                  l 4       9.           w                                                                                                                                                                              a                  ;

runoorv.

                                                      ..                                                                                                                        unc tot enty l,Wt (g (M.ChtP1K/4                                                                                                                                                                                     I

[i] 3[3sLUMsu NA .l i.,

                                                                                                                                                                   <.s l_ LLJ l !!l!Ii1J3 a s.

I 1 l R2 .T . fli x ruoNE:(912) 367-7781  ?  ; u Aut or entPantu .. o

                                                                           'bupul'IlllOlkldill.U Y1 I n luthillC U
                                                                                                                                                                                                                        ,j
                                                                                                                                                                                                             -i l

 ,t_  < .,. . .                                                                     !'

CEORGI A PO'.!ER COliPAtly PLAllT E. 1. IIATCll -{ UAXLLY, GA.31513 , Reportable Occurrence 110, 50-3G6/1978-61 filll ll Cause Description (cort'd) lI II of this type. The importance of securing instrument covers was emphasized l to csll personnel involved. I 4 l s 1 s

                                                                                        $l
                                                           *                            ,i s

l s l N i-t f

                                                                                  ..}}