ML19284A699

LER 79-014/03L-0 on 790220:decay Heat Cooler 3A Outlet Remote Shutdown Temp Indicator Inaccurate & Rendered Inoperable.Caused by Failed Resistance Temp Detector (Rtd). RTD Replaced & Sys Recalibr

ML19284A699
Person / Time
Site:	Crystal River
Issue date:	03/01/1979
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19284A698	List: ML19284A697 ML19284A699
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7903150214
Download: ML19284A699 (2)

Text

{{#Wiki_filter:e

  ,

l NRC FORM 364 U. S NUCLE AR RECULATORY COMMISSION

• 17 77)

  !                                                                                   LICENSEE EVENT REPORT                                                                    EXHIBIT A l

l

 ,

I CONTAOL SLOCK: l i l l l l l

                                                                                        .h l                     (PLE ASE PRINT OR TYPE ALL REQUIREO INFORMATION)
         >

o i

                   .

l F lucLl q coa.

                         .              s...

R) P 3 lg,l,0 l O j- lucess. I i. 0 l 0l 0 l 0l 0 l ;0n l:.0 lg;oc.ss.

                                                                                                         - .in 49 ;g 11...l l ul 1 og;,    s r j,. _g l                                                                                 \
 .         con'T
         ,

o , 8

                               ,"g gl 0l 510 l -l0 ; 3l0 l2 gl0l 2;2 l0l ed            65            Doca ET %i.v982                ad   49      twENT Q ATE 7l 9i gl75Or3101117l9l@

74 DE*Omf G Af t Ba EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES p y g lAt 0330 while performing Operat ng Daily Surveillance, SP-300, it was  ;

      ,     , ,          , determined that DH-39-TT, Decay Heat Cooler 3A outlet remote shutdown                                                                                                 j g , temperature indicator was inaccurate and was rendered inoperable. This_                                                                                                              g-ITTU ! event is contrary to Technical Specification 3.3.3.5.                                                                              Entered action                                1 ITTO l statement a .                                 Further invoerig,rinn en"n,1oA                                  eh,*      DTT1 W 9-TF b,A #,41oA                                    I a;, gNo effect upon public health and safety as DH-2-TE provides indication onlyi Redundant instrumentation
                ,        ,and does not affect decay heat cooling capability. NA. 1st occurrence underj
         ,         , ,                                                                                                                    cals ieca. spec.                                    .a
                                                  *$'s"              *c'o"da'    su's'i25                   covecsswTcoas                 su'eE*ea        suNEEe t,o_LJ8 l CIF l@ [_Ej@ [_Ej@ l I l NI S I Tl RI 11@ [,E_J@ [Z_j @                                                   ;o 9          to          in           12               i3                           18         19
                                             ,,,                                      S E Ot;f N7ta t                     CCc;magscg         an, Cat                        *E d'5'04 tga a          twtNTvtan                              agromT No.                              CODE              Tvet                           No
                         @ ,ajg,'o;              I7 I 9I              [--J          l 0 1 11 4 I              M,           l 01 3 I            [,L_J         l,2 -J           Lo_1

_a. u u :s u 2 a n u u E4 T Om ON ,t4%f 7 wCs*S 5 6 8Ce t $ n'e w a s s'a age ' Mlz_J@ u 2 G@ n L. Zl@ I 0 I o f 01 4 LY_J 1 1,- a <s

                                                                                                                             @        lsaNI@           W@

n l B l 014 l 5 {{

                                                                                                                                                                          .                  .,

g ;The cAUse causeOEsCRiericN of this event is AND attri CORRECnve ACricss The @ RTDbuted was replacec) to a fa

                         ,and the system was recalibrated. The indicator was returned to service                                                                                                 i
                         ,on 23 February 1979 at 0830. No further corrective action required.                                                                                                    ,

i 3 I I f L, i 145 ]9I 8a

                       $7AT                  % ' 3 54                     CtwgasTATUS                     's : a                          :.5*0vtav Ogs:.ief cs i   s

[EJ @ l 019l 81@ NA I [,,Bj@l Operator observation l

                                                                                                  = .i
        '
                  ' .!r,uTv           c
                                                          '2      is                                                4                                                                       na
                    ..< .               . . ..     .
                                                                  .v:Us, c.                                                              <cc ,m. ..<. . @

NA.:m.r @ l IM U

         '        ' '
                                 @.     [ Zjgl    =.ibi.st                                        "

l

                                                                                                                "

NA

                                                                                                                                                                                            "

l

                            ,w..
                               . .. e.m'."<          ...
                                                            , .:,,...o,@
                                                                 .e.s " ,,

IW I' Ol ' 01 d@[_2J@l su I

        '
                            , .sess.'J,w'ics                                                                                                                                              "

s v.s. :ss:n,.v es@ i

               . l 0[ 0l q@l                                                      NA                                                                                                          l
        ,         e e                     1-       ,:

as

                       '. ?, C ' *                                 @

R [ Zj@Q';?,i',*,* l C'u NA l

        ,         . ,               ,a
                                                                                                                                                                                            .a
                             * ' ' ' '                                                                                                                          "C di W'
                      . , ,

l'Til,l.jd,@ Tis:.,,.es@

        ,        ,

l a SA  ! IIIIIffIIi if I 4s e. so u..s 0 ,atu= ER _

                                           .                                                    J. C , '., -                           s-cv         (904) 795-6486 (SEE ATTACHED SUPPLEEE.NTARY INFORMATION SHEET)
                     --- -                                                                          .--                                                           . _ . .         _ _ . _

      *

,, e SUPPLEMENTARY INFORMATION Report No.: 50-302/79-014/03L-0 Facility: Crystal River Unit #3 Report Date: 1 March 1979 Occurrence Date: 20 February 1979 Identification of Occurrence: One remote shutdown instrumentation channel inoperable contrary to Technical Specification 3.3.3.5. Conditions Prior to Occurrence: Mode 1 power operation (98%) Description of Occurrence: At 0330, while performing daily Operating Surveillance (SP-300) it was determined that DH-39-TT, Decay Heat Cooler 3A outlet remote shutdown temperature indicator, was inaccurate as com-pared to the idle 3A cooler inlet temperature. Further investi-gation revealed that RTD DH-2-TE had failed. Maintenance restored indicator operability on 23 February 1979 at 0830 following RTD replacement. Designation of Apparent Cause: The cause of this event is attributed to a failed RTD, DH-2-TE Analysis of Occurrence: No effect upon public health and safety as DH-2-TE provides indication only and does not affect decay heat cooling capability. Corrective Action: The RTD was replaced, the system was recalibrated and the indicator (DH-39-II) was returned to service. No further corrective action required. Failure Data: First occurrence of an event reported under this Technical Specification.

  /rc}}