05000251/LER-1982-007: Difference between revisions

From kanterella
Jump to navigation Jump to search
(StriderTol Bot change)
(StriderTol Bot change)
 
Line 1: Line 1:
{{Adams
#REDIRECT [[05000251/LER-1982-007, Forwards LER 82-007/01T-0]]
| number = ML20054G295
| issue date = 06/07/1982
| title = LER 82-007/01T-0:on 820522,while Boron Injection Tank Recirculating W/Boric Acid Storage Tank C,Low Boron Concentration Found in Both Tanks.Caused by MOV-4-867B Being Open One Turn.Valve Manually Closed
| author name = Pace P
| author affiliation = FLORIDA POWER & LIGHT CO.
| addressee name =
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
| docket = 05000251
| license number =
| contact person =
| document report number = LER-82-007-01T, LER-82-7-1T, NUDOCS 8206210385
| package number = ML20054G289
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 2
}}
{{LER
| Title = 
| Plant =
| Reporting criterion =
| Power level =
| Mode =
| Docket = 05000251
| LER year = 2082
| LER number = 7
| LER revision =
| Event date =
| Report date =
| ENS =
| abstract =
}}
 
=text=
{{#Wiki_filter:. .
NRC FOAM 364                                                                                                                          U. S. NUCLEAA REGULATORY COMMISSION (7 773 LICENSEE EVENT REPORT I I        t                      utaAse ra:NT on Tves ALL neculato iNroAMATIONI c0NTact. stoc<: l                  l 1          I i                                    e@
[TT 1 P        3 3Iv i TIT      UCENSEE ! PCODEI S! 4!@Ml0!0 l- I O .sciNi4 10 lNwwSSA  0 0 IO l- I O10 1
JS l@l4 6.CEN54
                                                                                                                                            ;6 Il l 1l Yveg II1 J3l@l 61 CAT  ! l@  id CON'T lolil r
                              "f ,% @_ @ l 015 101 0101 215                                              M 11 69 Gio I S I 2121812@lol6fot718!2l@
14      ?s    agpQAT3aTI            40 S                        40            61              OCC4 4T NwMe t R                                4 VENT 3ATI tveNT osscairrios ANo eacsA8LE CoNSEcuGNCE3 I o i r1 i Unit 4's Boron Injection Bank (BIT h ) was being recirculated Iwith C lo 121 1 Acid Storace Tank (BAST) . A sample taken from the BIT revealed that the                                                                                                          f 17141 l boron concentration was below the minimum allowable limir of 20.000 nnm.                                                                                                          I I .> I s i i This is reportable in accordance with T.S.                                                                3.4.1.a.2.                    The C BAST was then I i a is 1 I recirculated and a samole was drawn. This horon concentration was also                                                                                                          1
[o j r; l found to be below the limit. A and B BASTS were sampled and found to have 1 10631I acceptable boron concentrations.                                                                                                                                                  I 7
50 3 3 SYSTE'J              CAJsE          CAL $E                                                            C3Me          vau g 2001                COQE        $U8CCOE                    COMPONENT CODE                      tceCc33        sugCOOE le 191                              lSl Fl @ [x_j @ lZ l @ l ZIZl Zi ZiZl Zi@ W @ [Z_j @                                                                    23 F        &                          9          10          11            12                83                            18              ed Jf 971AL                        OCOLgeESCE                esece ?
* Eviss 34
_EvtNTvtam                                  li3'on aEP        r No.                          COC4                  n Pt                        N C.
                      @ lcla    g:;T80
_a, la I ?!
u l-l n
10 101 71 2                  :.
M 2r 1011 I
:s        n ITl u            l. ,--J      Lo_j n
CC
                      ^*iN 'frYl4
                          .                            C'Ut' fir          5*4WE' u                          -ouas 22        ^U.'*WT s            .8"S7 "s'f$t //                          vis*u","$0.',.
LXJ@l.x                jg        i z ig              g@
u l 010 10 l              [    [Y u_
j@          [Njg W@
                                                                                                                                            <a _
J Z ]9 l9 l 9 lg u            ><                  2s                                  2 '.                    ao                                        n              u                .1 cAuse oescaierion ANo coanscave AcriaNs @
i , , o j l Inspection of the system lineup found MOV-4-867B open one turn.                                                                                          It was              ;
          ,,;,,, manually closed. A high head safety injection pump was being used to fill ;
gi                the accumulators on Unit 3 with water from the refueling water storage tanka ii ! 21 1 It is suspected that some of this flow went through MOV-4-867B. diluting                                                                                                        i Iilai I ehn BIT.                          Adoannen BIT concentration was confirmed in 2.25 hours.                                                                                        !
r      B 9                                                                                                                                                                            30 57        5 it Isl (E j @ l 1l 010 l @ l NA
                                            %*OWER                          CTwt457ATUS l
D'S    V  V W @lRoutine Sanpling and Analysis OiSC3v!Rv oEscaiPT'04      h                  !
          '                                              ''      ''                                "      ''          '*                                                                    so
                ' .C'riviry        C:  '4rtst
                                                                                                                                                '**"cuen=ttrasa@
j@lavou~r ca .Criviry @ l l i                  .ite.se                                                                                              NA li!6I[Z_j@aenasuaase[ZNA                                                                                                                                                                  !
                              <w=ves.sodio        ves            sSes @
essCaierio=
I
;        l ' I i [0 l 0 l O l@[Z_J@lNA
'        '      '    '    ,  sasen.~e'e b ' Ass
                                                                ''                                                                                                                              i*
su..e .              :ssCa..rics@
liial1010IOl@l r      ua                      n NA 2                                                                                                                                            u
                      'rves            1C 77 og I8 Ii![Z_j@l                      NA                                                                                                                                                    I
          ,      , .                  >                                                                                                                                                          30 NPC LSE O\I*Y gg              (sCa.af.ON W ed@l v          >
NAa i i it! flIiit It !
sa su                            n
                                                                        "          Pam yaven,..,-.---                            L.                                                            p css          (305) 55?-%54 I
8206210385                                      1 l    PDR ADOCK 0                              png
\    R I                                                                                                                                              __-                                      _ _ _ _
 
> e d LER 251-82-007 ADDITIONAL EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Unit 4's Boron Injection Tank-(BIT) was being recirculated with C Boric Acid Storage Tank (BAST) by using the mini recirculation pumps. The BIT was sampled at 5:00am and the results showed a concentration of 19,000 ppm. Another sample was taken to check the results of the first analysis. The original results were confirmed. The system lineup was checked and flow was adequate. Then C BAST was recirculated alone and a sample was analyzed. A low boron concentration was also found in the BAST.
ADDITIONAL CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The system lineup was inspected and MOV-4-867B was found open one hand turn.
The nuclear operator closed it manually. No other abnormalities were found in the system. While the BIT-BAST recirculation was taking place, a high head safety injection pump was being used to fill the accumulators on Unit 3 with water from the refueling water storage tank. It is suspected that some of the flow went through MOV-4-867B, diluting the BIT. However, no substantial level increase in the BAST was noted that would tend to support this explanation.
After MOV-4-867B was closed, the BIT was recirculated with one of the other two BASTS which contained adequate boric acid. At 7:15am, a sample from the BIT was analyzed and found to have sufficient boron concentration. Boric acid was added to C BAST and an acceptable concentration was confirmed at 12:19am on May 23, 1982.
Apparently, the Limitorque Operator on MOV-4-867B had failed to close the valve completely. A test will be devised to verify that the Limitorque operator properly closes the valve and assure that any seat leakage is min-imum.
It should be noted that with the upcoming installation of model 44F steam generators currently scheduled for November, 1982, the concentration require-ments in the BIT will be dropped.
}}
 
{{LER-Nav}}

Latest revision as of 22:53, 18 March 2020

Redirect to:

Retrieved from "https://kanterella.com/w/index.php?title=05000251/LER-1982-007&oldid=2626506"