ML17309A154: Difference between revisions

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| issue date = 05/11/1981
| issue date = 05/11/1981
| title = LER 81-007/03L-0:on 810418,loss of 34.5-kV Supply to Transformer 12 Occurred,Creating Loss of Offsite Power. Caused by Fault in B Phase Vacuum Breaker Switch Which Supplies Spare Transformer 12B
| title = LER 81-007/03L-0:on 810418,loss of 34.5-kV Supply to Transformer 12 Occurred,Creating Loss of Offsite Power. Caused by Fault in B Phase Vacuum Breaker Switch Which Supplies Spare Transformer 12B
| author name = EDGAR C
| author name = Edgar C
| author affiliation = ROCHESTER GAS & ELECTRIC CORP.
| author affiliation = ROCHESTER GAS & ELECTRIC CORP.
| addressee name =  
| addressee name =  
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:LER81-007/3L-0LICENSEEEVENTREPORTCAR13001)3)4)7)8)10)ControlBlock:LicenseType:I4',1'1,',1',1',DocketNumber:I0I50002EventDate'IOI11II11EventDescriptionandProba2)LicenseeCode'.'N'Y',R',E',G0I0'0I-I0I0',5Cat:II/6)ReportSource9ReportDate'0'5'1111811IbleConsequences:~ILI~IIeIDurinsteadystateoperationalossofthe34.5KVsupplytofINo.12transformseroccuredcreatingalossofoffsitepower/,toannatation.iscreatedalossofpowerto1Iussesand1andsaeguarbussesan11.EmergencyD/G's1Aand1BstartedonundervoltagesignalIIandsuppliedpowertotheOVsafeguardbusses.ThetemporaryIIinterruptiontotheowersupplyforthe1Binstrumentbus11)14)17)18)21)23)25)27)SystemCode'EAI12)CauseCode:',E',13)CauseSubcode:IAIComp.Code:/,~C/K/T/BIRIKI15)Subcode;/X/16)ValveCode:jZ/~'-''7'/'ctionTaken:IX'19)FutureAction:',Z',20EffectonPlant:',B',ShutdownMethod:IZI22)Houls'0I010I5IPrimeComponentSupplier:ILI26)Manufacturer:',J',1'I~2,0',CauseDescriptionandCorrectiveActions:',Thecausewasidentifiedtoafaultinthe"B"Phasevacuumf',breakerswitchwhichsuppliesthe12Bsparetransformer.,The12transformerwasisolatedfromthe3.5KVbusandpower>',wasrestoredtotheNo.12transformer.Thesafeuardbusses',,weretransferredbactoteirnormalsupplyandtheemerpency',',DieselGeneratorssecured.28)30)31)32)33)35)36)37)39)40)41)42)43)44)45)FacilityStatus:',E',OtherStatus:1N/A1MethodofDiscovery:IAIDiscoveryDescription~IOperatorObActivityReleased:IZI3ContentAmountof'ctivity:,I/AILocationofRelease:/N/AlPersonnelExposuresNumber:100I0IDescription:',N/AIPersonnelInjuriesNumber:',0',0',0',Description:IN/AILossoforDamagetoFacility:IZIDescription:IN/AIPublicityIssued:INIDescription:/N/AlIOI9I5IservationiofRelease:IZI38)ExposuresType:',Z',NRCUSEONLYNameofPreparer:ClairEdgarPhone:315-524-4446x248
{{#Wiki_filter:LER      81-007/3L-0 CAR  1300 LICENSEE EVENT REPORT
: 1) Control Block:                                        2) Licensee Code'.                              'N'Y',R',E',G
: 3)                                                 0 I 0'0 - I            I  0I0        ',
: 4) License Type: I 4', 1'1,',1 1', 5 Cat:  ',
I      I      /   6) Report Source        ~
                                                                                                                            ~
I I L II
: 7) Docket Number: I 0 5 0 0 0 2 I
: 8) Event Date'IOI 11 I I 11                        9    Report Date'0'5'1111811 I
: 10) Event Description and Proba ble Consequences:
e IDurin      steady state operation a loss of the 34.5KV supply tof INo. 12 transformser occured creating a loss of offsite power/
                    ~
    ,to anna tation.                       is created a loss of power to                                          1                I usses        and    1          and              sa eguar                            busses                        an 11    . Emergency D/G's 1A and 1B started on undervoltage signalI I  and  suppl ied power to the                      OV safeguard                              busses . The temporary                  I Iinterruption to the ower supply for the 1B instrument bus
: 11) System Code ' E A I 1 2) Cause Code:                                           ', E   ',   1 3)   Cause Subcode: I A I
: 14) Comp. Code: /,~C/K/T/BIRIKI 15) Subcode; /X/ 16) Valve Code:jZ
: 17)      /                                         '-'
: 18)            Taken:     IX'19)               Future Action: ',Z', 20 Effect on Plant:
                                                              '7'/'ction
                                                                                                                                        ',B',
: 21) Shutdown Method: I Z I 22) Houl s' 0 I 0 0 I5 I                                    1 23)
: 25) Prime Component Supplier: IL                      I    26) Manufacturer: ',J',1'I~2,0',
: 27) Cause Description and Corrective Actions:
    ',The cause was identified to a fault in the "B" Phase vacuumf
    ',breaker switch which supplies the 12B spare transformer.
    ,The 12 transformer was isolated from the 3 .5KV bus and power>
    ',was restored to the No. 12 transformer.                                                     The safe uard busses',
      ,were transferred bac to t eir normal supply and the emerpency',
      ',Diesel Generators            secured.
: 28) Facility Status:           ',E',                                             IOI9I5        I
: 30) Other Status:        1N/A1
: 31) Method    of Discovery: IAI
: 32) Discovery Description~IOperator                                      Ob servationi
: 33) Activity Released:                Z              Content of Release:                                  IZI
: 35) Amount    of'ctivity:,I/A3      I    I I
: 36) Location of Release:                  /N/Al
: 37)  Personnel    Exposures            Number:         10 0 I 0              I        38) Exposures            Type:   ',  Z ',
39)
 
== Description:==
N/A  ',
I
: 40) Personnel Injuries Number: ',0',0',0',
: 41)
 
== Description:==
IN/AI
: 42)  Loss of or Damage to Facility: Z                        I            I
: 43)
 
== Description:==
N/A  I        I
: 44)  Publicity Issued: N           I    I
: 45)  
 
== Description:==
/N/Al NRC USE ONLY Name    of Preparer: Clair                Edgar                                Phone:         315-524-4446 x248
 
ATTACHMENT TO LER FORM
: 10) Event  Description  and Probable  Consequences contd:
    'caused  numerous  alarms and  an approximate 105 runback to',
5  nuclear power. Conditions were stablized by operationsI
    <personnel  and  plant o eration continued.


ATTACHMENTTOLERFORM10)EventDescriptionandProbableConsequencescontd:'causednumerousalarmsandanapproximate105runbackto',5nuclearpower.ConditionswerestablizedbyoperationsI<personnelandplantoerationcontinued.
l}}
l}}

Latest revision as of 09:54, 29 October 2019

LER 81-007/03L-0:on 810418,loss of 34.5-kV Supply to Transformer 12 Occurred,Creating Loss of Offsite Power. Caused by Fault in B Phase Vacuum Breaker Switch Which Supplies Spare Transformer 12B
ML17309A154
Person / Time
Site: Ginna Constellation icon.png
Issue date: 05/11/1981
From: Edgar C
ROCHESTER GAS & ELECTRIC CORP.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17258B043 List:
References
LER-81-007-03L, LER-81-7-3L, NUDOCS 8105180308
Download: ML17309A154 (4)
v • d • e


Text

LER 81-007/3L-0 CAR 1300 LICENSEE EVENT REPORT

1) Control Block: 2) Licensee Code'. 'N'Y',R',E',G
3) 0 I 0'0 - I I 0I0 ',
4) License Type: I 4', 1'1,',1 1', 5 Cat: ',

I I / 6) Report Source ~

~

I I L II

7) Docket Number: I 0 5 0 0 0 2 I
8) Event Date'IOI 11 I I 11 9 Report Date'0'5'1111811 I
10) Event Description and Proba ble Consequences:

e IDurin steady state operation a loss of the 34.5KV supply tof INo. 12 transformser occured creating a loss of offsite power/

~

,to anna tation. is created a loss of power to 1 I usses and 1 and sa eguar busses an 11 . Emergency D/G's 1A and 1B started on undervoltage signalI I and suppl ied power to the OV safeguard busses . The temporary I Iinterruption to the ower supply for the 1B instrument bus

11) System Code ' E A I 1 2) Cause Code: ', E ', 1 3) Cause Subcode: I A I
14) Comp. Code: /,~C/K/T/BIRIKI 15) Subcode; /X/ 16) Valve Code:jZ
17) / '-'
18) Taken: IX'19) Future Action: ',Z', 20 Effect on Plant:

'7'/'ction

',B',

21) Shutdown Method: I Z I 22) Houl s' 0 I 0 0 I5 I 1 23)
25) Prime Component Supplier: IL I 26) Manufacturer: ',J',1'I~2,0',
27) Cause Description and Corrective Actions:

',The cause was identified to a fault in the "B" Phase vacuumf

',breaker switch which supplies the 12B spare transformer.

,The 12 transformer was isolated from the 3 .5KV bus and power>

',was restored to the No. 12 transformer. The safe uard busses',

,were transferred bac to t eir normal supply and the emerpency',

',Diesel Generators secured.

28) Facility Status: ',E', IOI9I5 I
30) Other Status: 1N/A1
31) Method of Discovery: IAI
32) Discovery Description~IOperator Ob servationi
33) Activity Released: Z Content of Release: IZI
35) Amount of'ctivity:,I/A3 I I I
36) Location of Release: /N/Al
37) Personnel Exposures Number: 10 0 I 0 I 38) Exposures Type: ', Z ',

39)

Description:

N/A ',

I

40) Personnel Injuries Number: ',0',0',0',
41)

Description:

IN/AI

42) Loss of or Damage to Facility: Z I I
43)

Description:

N/A I I

44) Publicity Issued: N I I
45)

Description:

/N/Al NRC USE ONLY Name of Preparer: Clair Edgar Phone: 315-524-4446 x248

ATTACHMENT TO LER FORM

10) Event Description and Probable Consequences contd:

'caused numerous alarms and an approximate 105 runback to',

5 nuclear power. Conditions were stablized by operationsI

<personnel and plant o eration continued.

l

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