View source for 05000029/LER-1986-013, Forwards LER 86-013-00 Re Reactor Scram Due to Operator Error

{{Adams
| number = ML20214J014
| issue date = 11/03/1986
| title = Forwards LER 86-013-00 Re Reactor Scram Due to Operator Error
| author name = St Laurent N
| author affiliation = YANKEE ATOMIC ELECTRIC CO.
| addressee name = Murley T
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| docket = 05000029
| license number = 
| contact person = 
| document report number = NUDOCS 8612010119
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 1
}}
{{LER
| Title = Forwards LER 86-013-00 Re Reactor Scram Due to Operator Error
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000029
| LER year = 2086
| LER number = 13
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

=text=
{{#Wiki_filter:. . . .
YANKEE ATOMIC ELECTRIC COMPANY                                                 r.i.vuvn. tars ><2<.828,
                 -                    Star Route, Rowe, Massachusetts 01367 N_
    ,Yaux, es November 3, 1986 U.S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention:                Dr. Thomas E. Murley, Rngional Administrator

==Subject:==
Licensee Event Report 50-29/86-13 Reactor Scram Due to Operator Error

==Dear Sir:==

In accordance with 10 CFR 50.73(a)(2)(iv), the attached Licensee Event Report is hereby submitted.
Very truly yours,                                   .
                                                      & Hun [ t i' f        gu, f Normand N. St. Laurent Plant Superintendent DAR/nm Enclosure cc:          3'    NSARC Chairman (YAEC) 1      Institute of Nuclear Power Operations (INPO) 8612010119 861103 PDR      ADOCK 05000029 S                      PDR c ...

I                                                                                                                                                                                       ;    1 a
U.S. NUCLtid REGUL1 TORY ComassiassN asRC Persie 30s
      *
* 3'                                                                                                                                       AnRovt oMe No 31so_'i 0.
LICENSEE EVENT REPORT (LER)
DOCaf f NUMG4 R 12)                           FAGE G PACitlTV NAMS HI Yankee Atomic Electric Company                                                                                       oIsIoIo1o101219                          1 lOFI Of 1
      "'1Eactor Scram Due to Operator Error                                                                                               .
REPOmf DAf t (7,                    OfMER 7 ACILITits iNv0LytD 191 EvtNT oaf t ISI                   LER NUMGER IS#
ract ury maMes                     DOCatT NUwetR($1 MONfM        DAY     VtAR     vtAR         8 8,0, $',7,''       Qv,*$
                                                                           ,     MONTM      OAv     vtAR 0 1510101 0 1 I i o isto lo ioi l'i
                                             -~                   ~~
1] 0 0l 4           86 8l 6               0 j1 l3               0l0       1l1       0l3 8l6 rMis REPont is sueMifTEo PunsuANT To THE RtovintMENis oe i0 CrR 4 te* e . e,                < e,,*. ,e re...,> iiii                            ,
M=t ai           2       a mi.i                                   n .0.i.i                       X .0 ni.iaH...                                n in.i u.nieH2H.,                                  n.i n.,
u .0.ain H0 g             000
                                                                                  .O ni.Hu u ni.H2,                         u.nainH...                                  o,1, ty,v,gj. g. ,,
noi          i i           a .0.i.Hi n.i 20 400teHiHehl                           80.73IeH2Hel                     50.73teH2HealitAl                           J66AJ                       ,
to .06taHi Hiv,                          50 7SteH2Hui                     60.731eil2HvehHel 20 406talliHel                          50 72iaH2ila.1                   30 72reH2Hel
* LICENSEE CONTACT FOR TMit Ltm till N A:;g                                                                                                                                          it LIPMONE NWMetR Donald A. Rice, Plant Engineer                                                                                        4li i3 4,2,4                   i  i 5 i2i6j l_
COMPLtit ONE LING FOR R ACM COMPONENT 7 Altunt DESCRIGED tN rMis merom? qi2i Clutt     systtu     COMPONENT          ***y'g AC         atP "
y0 Pm    I'                      CAvlt SYSitM  CouroNFNt          Y A Nj'g',C atP "n ea y0 P l        l I l             l 1 1                                                       I       I I I              I I i
                       !        I I I             I l !                                                       I       1 l !              I I !
MONYM    Day      vtAR SUPPLtutNTAL a Pont EXPECTED ties Yll(f, tes es.prees iJrPfCrf0 sueMissrov 04 rit                                NO                                                                      g        [        l
        .aY..C,<L-.,,,, . M-            ....    ,s....   .. .,,. ,. .,,,,- ,,,,,.. ,n..
On October 4, 1986, at 2309 hours, the reactor was scrammed when the Main Steam Line Non-Return Valve (NRV) trip circuit Trip / Reset switch was inadvertently placed in the Trip position. At the time of the scram, the plant was in Mode 2, at a power level of 1 E-7 amps and was preparing to go to Mode 1. All systems performed as designed.
The root cause of the event has been attributed to personnel error by the Control Room Operator (CRO) who was in the process of opening the NRVs. The CR0 intended to place the NRV trip circuit Trip / Reset switch to the Reset position prior to opening the NRV. The switch was inadvertently turned to the Trip position thus causing the reactor to scram on a NRV closure signal.
Corrective actions include: 1) reinstructing the CR0s of the importance of switch positioning and 2) placing a step in applicable plant proceduce to make operators aware of the consequence of incorrect NRV trip circuit trip / reset switch positioning.
There was no adverse effect to the public health and safety as a result of this event. This is the first event of this nature.
                    -~'bbkk7h N %                                                                                                                                    %                     ,
N.C .          .
I9 $ 31                                                                                                                                   **

r*
           %b  '\ Y l
l l
l l
l ak
* p
}}

{{LER-Nav}}