View source for 05000000/LER-1986-020, Partially Deleted LER 86-020-00:on 860812,security Sys Experienced Loss of Power.Caused Withheld.Numerous Failures Experienced Until Machine a Designated as Prime.Procedures to Reboot Computers Revised

{{Adams
| number = ML20238E769
| issue date = 08/15/1986
| title = Partially Deleted LER 86-020-00:on 860812,security Sys Experienced Loss of Power.Caused Withheld.Numerous Failures Experienced Until Machine a Designated as Prime.Procedures to Reboot Computers Revised
| author name = Romberg W, Weekley P
| author affiliation = NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
| addressee name = Starostecki R
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| docket = 05000000, 05000245
| license number = 
| contact person = 
| case reference number = FOIA-87-410
| document report number = LER-86-020-02, LER-86-20-2, MP-9387, NUDOCS 8709150191
| package number = ML20238E403
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 5
}}
{{LER
| Title = Partially Deleted LER 86-020-00:on 860812,security Sys Experienced Loss of Power.Caused Withheld.Numerous Failures Experienced Until Machine a Designated as Prime.Procedures to Reboot Computers Revised
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000000
| LER year = 2086
| LER number = 20
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

=text=
{{#Wiki_filter:.
    .  ..C
      ' 's 4 3 . _
                                                                                                                                                     .._t...t_.T.._._
APPhovt0 OM8 to 31e64104 LICENSEE EVENT REPORT (LER)                                                   8 5 *' 8 8 8 '''' "
       # Acattiv haut its                                                                                                                 poCKat uvustacal                           Fact m Millstone Nuclear Power Station                                                                                             o is Io Io Iol2l4 51               i lor l 0 l 4 )
TITLE les Loss of Computer System Units 1, 2 and 3 8 V E NT DA Y t all                   Lt A kvWet t it)                       AEPOAY OATI (7)                        CTMte F ACILITit s isavogvt0 ten WONTM        DAY       YEAa     vtam          58,0
                                                               ,a 6          o g      WONTM        DAv  vtAn                f ACikiT ' h a w.4                DOCKit Nvutte,tt Millstone Unit 2                               n i s t o 1 o g 01 3 i316
                                                                     ~
0} 8 1l2 g ,g g 8 6       8l6            0l2 l0             0 l0      0l8         1l5;   d6 Millstone Unit 3                                   o i s t o i c i o i412 i3 TMtB A68087 is SveMITYt0 PVA8vANT TO TM4 AEQUI Atut8tT10810 Cf R $ ,Cheet eae e'
* w a',Ad 8p"ow'aa, (t il mo0f a' N        n .o3,.,
n .0 i.i                           .0 73.iuH.i 13.rimi a                          a 40steH111d                                                                                                  _
60 36ist(t)                        to f 3 43Hel                             73.71to) n.,         1 i o, o             n .0.mn H.,
                                                                                     . . . .                            - ,3.,aH       i 70 406teH1Hast D0 736s)W41 to73.lWHe*KA)
_      gT,g3 pjgg
_                                            Js6A/
a 40$lsH1H=1                             to 73neM3He)
_                                          90 736elt3HeustBi a artisH1Hel                             to 73teHaltal                      80.731 slo Hal LlCINStE CONTACT 704 Tuts Lt A (131
       %AMI Titt*MONE hvheta anta Coct Patricia L. Weekley - Security Supervisor COMP Lif t Okt Leht 80m ( ACM CohePOWINT F A8LU88 Ot9Ca f 810 IN TMis m E*0a7 r13, 203 4 i 47          i      i -i l79i i l CAv$t     Sv5 TEM     C0ts*0% E N T "fvN^$4            YO  e'aff                        CAvst s v 5T E M  COW 80444T          "#       C      R g             Og, tai           '
II A VIJ!X i                  N il i S 18             N i i i i                            i i i
                                                                                                                                          }
t           1 I I              i i 1                                                                                 '
i       t I !               I I i l                                                   SUStLtWENT AL a tmost E KPICT401941
  '                                                                                                                                                                  te0NTM    OAv      'EA*
i   ~) ,8s ,,. - < .aerao sano. wa,                                                     p~0                                                     'nVMlf,''
      .w . AC T ,t                                                                                                                                                      ,       ,
                          . . .x -., , , ,,. ~.., ,~ ,,. .. ,,,,_,.. ,,n.,                                                                                                                ;
On August 12, 1986 at 0004 hours the security systems                                                                 Units 1, 2 and 3 experienced a loss of power. This loss was caused supplies power to the security system.                                                                                           this center to be mamamenen e system ope.usor however it was not known by the Security Shif t Supervisor who was atte.pting to reboot the Unit 1/2 system. The Unit 3 system comput es and "B" were restored at 0016 hours. Numerous attempts to restors the Unit "A" I
s were made however due to th
                                                                                                                           ~
The Unit 1/2 "B" computer was restored as the prime ma ine at 0054 by                                     e on-call Computer Services en ineer.
               "A"                              s also restored                                                                                         The Unit 1 2               '
gg91go191070910                                                       _ _ _ _                                                             -

                    ,                                                                                                                                                                                       l
* h4 S wm MS                                                                                                                                                W A SpVCLE AR RE OVLATOAV COMurtscas Apenovto ow No rime
                                                                                                                                                                           '''''''82''"
LICENSEE EVENT REPORT (LER) 8 ACILifv 4AA81 nl                                                                                                                              00CaET wvusta Qi                        FAQt 4 Millstone Nuclear Power Station                                                                                                     o gs g o ;o lo;2 4 15 2 lorj0 l 4 f a f L t is.
Lo6.S of Computer System Units 1, 2 and 3
                  $vlwt patt t$l                           Lt a hwin 467                               AEPont DAtt IPs                             07Mta F ACsL tits servotytp si
                                                                                                                                                                                                            ]
MONT.          Cae   vtam             vtan          s e o, g' as e        as o        MONTm        CAv    ytAm                     Facttity maases                 DOCKit NUMetal8) g Millstone Unit 2                              -
o is to lo1c133i 16 0 l 81l2             8 6               8l6 voit al.o.,
0 l2 l 0              0l0 0l8 1l5)d6 Millstone Unit 3                                                          o isio io ioi4 12 i3
                 ,,,,,,,,                                             v .rrio eu. ua , to t t at Ovi.8 im o i. C,.                  i <c,,   .     .     - .,,, i rm
                    'co n +          N               n mm,                                       n .cs,.,                                  so nu>au-l                            Fu,w T
g                                       m .0. .in Ha                                no mi.im                                  no nwimi.i                           n.m.i n.,
1i010                    m .a.in H.i
                                                                                                 .o m..im
                                                                                                                                           = n >uH i
_    g,,Ea;s. ,g.ag N eosiainHm)                                So 736eicllll                             to 73naK2H eENA)                     JESA/
l                                                    M 4066sH1Hwi                                to 734aM3Hui                              90.78teH2H eWee M 4051eH1Het                                to.73te H2116si)                          9 736a10Hal LICENSEE CONTACT PC A TMit LE A n23 an AME TELtPMONE huwsta l
Att A COct l                     Patricia L. Weekley - Security Supervisor 2 0:3 4:47          1   1i l j7 9 il 3 CosettTE Okt Leht som E ACM COMPoa.Em? F ArLya8 Of 9CRIS60 sm TMig mEpowT tts CAvst ses'tu         c0urcht%T                                     "fo pa *s''                            Cavil f v 8T 8 W       COu80Nimi        TyC              m    ta t iia   V iJi X i                  NlS i i 18               N                                              i            i i i           i i i i         ! I I                    I I l                                                               l            I I I           I I I
                                                                   $UPPstast WT AL At*Omf 8 xPECitD nos                                                                             MONTH    DAY     vt A81 1                                                                                                                                                        O''S's 1
( q .8s ,,,,., am. uareerto s+oa.ss,o. u rui                                                        T} .o                                                                                                 i
!          ut.Act t ..., n. , a                   ..        . .~.., .        . .,    u,           n.. ,.. n . i l
Both system                                                                       ntil norTnal power was restored at                                                                  '
approximately 0207 ours.
Numerous failures on the Unit 1/2 system occurred during troubleshooting to determine why the "A" machine would not act as prime machire. This troubleshooting continued until 1916 hours when the "A" machine was finally made prime.
         ,at e, .' -- "'

wnC seesn htA                                                                                          U 8 NUCLi A8 88GVLAi0AT COMurssach LICENSEE EVENT REPORT (LER) TEXT CONTINUATION                                  Areaom o    =o me-cio.
ve,nu s v a F ACILIT V h AMI 113                                   DOCS 4 T NUMBim Qi LE R NUMet R let                       PAGE 17 viam      Sl ovi k t e a k i
* Evac =
Millstone Nuclear Power Station                                                    """"          '
Unit 1                                      o 45 ;o j o Io 1214 l5 8l6     -
0 l2 l0            -
Op 0l3        0F 0F n ,, _ ,,,,. m .. m oc w m u n ni Identification of Occurrence Loss of            r to the security system and failure of th                                                     .
tich resulted in the failure of all security compu ers. nce the machines ere rebcoted failure of the Unit 1/2 "A" computer to take prime.
Effects of Event Loss of alarm surveillance as follows:
Unit 1/2 0004        SL .inutes                           1559         2 minutes 0112          2 minutes                          1655         2 minutes 0150         3 minutes                           1723        12 minutes
                *0207           1 minute             n             1742         5 minutes 0333 0359 4 minutes 10 minutes g Mg       ~        Unit 3-1 minute
                                                                     ^
0453        2 tinutes                                        12 minutes 0606          / minutes                       *0207           1 minute i              1916 Unit 1          "A" c     r mad   ri            hine.
t
* Loss due t                                                        -
1 Description of Compensatory Measures Description of Apparent Cause                                                                                                    .
: 3)         Failure of the Unit 1/2 "A" machine to take control as the prime machine.                                           '
This problem was traced to an
: 4)         Delay in rebooting the Unit 1/2 system was due to lack of knowledge on the                                          l part of the Security Shift Supervisor th                        will on1              accept a reboot when the terminal is i                                                             ,
j

no 4KC Fotb 3844*
U S NUCLE AR AIGUL Af oAV COMMeggion
       ' " "-                      LICENSEE EVENT REPORT (LER) TEXT CONTINUATION                          Aremovie oMe ~o moaio.
EAPIR15 8'31/N                 I F ACILITY h&Mt its                                 DOCm&T esvusta t2l             gga gyugg A 183                    PAOl G Millstone Nuclear Power Station
                                                                                  ''''         0%" ' t'a'.??
Unit 1 01510 lo lo 12 l4 l5 8l6     -
0 l2 l0      -
0 [0 0 14        0F 0l4    l
         .x, w - ~ = m ~ ~ n c r wan,n Corrective Action i
: 1)       Breaker trip is being investigated and repaired by Unit 2 Operations,                                          l Maintenance, and Production Test personnel.                                                                    '
: 2)       The                            were replaced. Ti             as tested and                   #-)
returned to service by Pro     ion Test Personnel.                                                             .
4
: 3)       The problem with the                      'as corrected by Computer Services personnel,                                                                                                     i
: 4)       The procedure that outlines the steps to be taken to reboot the computers                                      I will be     ised to specify that the console terminals must be in theh                                         i 1
4 I
s I
I

[)
      *e y
1 NORTHEAST UTILITIES                                             \      /    ' " * ' ' "'" " S'' * " 8 ""' S """ C """' *'
l            es       ..ss. cme ri eac=c nw. -                    /                 P O. BOX 270
                       .o .'ta w .  . ,0. w . 2, . ,                       d                     H ARTFORD, CONNECTICUT 06141-0270 L     '    J %%CZOO%'.~J.                                                           (20m ses-sm
                                                                            '-           j g "o                 IAugust 15, 1986 Q [ 3 d[t[fc{                 ch'[4 MP-9387
                                                                                 -(> 3.Lf, Docket No. 50-245
                                                            /                                      Docket No. 50-336 Docket No. 50-423 Mr. Richard W. Starostecki, Director Division of Project and Resident Programs NRC Region i U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania                     19406

==Dear Mr. Starostecki:==

This letter forwards a report of a security related event pursuant to the requirements of 10CFR part 73, paragraph 73.71(c).
Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY l                                                                 &&           l l
'                                                                 Wayne D. Romberg Station Superintendent Millstone Nuclear Power Station WDR/PLW:cjh

==Attachment:==
Report of Security Event 86-020-00 cc:      Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission, Washington, D.C.                  20555 w ousesammann flammushielemasses.
oW
                                                                                                                          --
}}

{{LER-Nav}}