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| {{Adams
| | #REDIRECT [[05000366/LER-1980-139-01, Ae Advised That Drywell Equipment Drain Sump Discharge to Radwaste Piping Not Seismic Beyond Inboard Isolation Valve.Caused by Installation Error on Anchor 2G11-RAD-A90.Restraint Added]] |
| | number = ML19338G048
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| | issue date = 10/21/1980
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| | title = /01T-0:on 801008,AE Notified of Improper Placement of Anchor 2Gll-RAD-A91,resulting in Seismic Vulnerability of Containment Isolation Valve 2G11-F020.Caused by Failure to Follow Original Design.Order to Close Valve Issued
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| | author name = Coggin C
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| | author affiliation = GEORGIA POWER CO.
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
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| | docket = 05000366
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| | license number =
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| | contact person =
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| | document report number = LER-80-139-01T, LER-80-139-1T, NUDOCS 8010280377
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| | package number = ML19338G047
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 2
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| }}
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| {{LER
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| | Title = /01T-0:on 801008,AE Notified of Improper Placement of Anchor 2Gll-RAD-A91,resulting in Seismic Vulnerability of Containment Isolation Valve 2G11-F020.Caused by Failure to Follow Original Design.Order to Close Valve Issued
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| | Plant =
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| | Reporting criterion =
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| | Power level =
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| | Mode =
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| | Docket = 05000366
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| | LER year = 1980
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| | LER number = 139
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| | LER revision = 1
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| | Event date =
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| | Report date =
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| | ENS =
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| | abstract =
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| }}
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| =text=
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| {{#Wiki_filter:U 77)
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| LICENSEE EVENT REPORT CoNTF oL BLOCK: !
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| l l
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| l l
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| l (PLEASE PntNT On TYPE ALL REQUIRED INFoHMATION) l Gl Al E l I l H l 2 l@l 010 l - 1010 l 0 l 010 l-l Ol 0 l@l 4 l 1 l 1 ] I l l j@l l
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| l@
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| 8 60 01 DOCK E T FJUMO L H w
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| b'J LVLN1 OAlE 74 75 RE POR T D AT L FJ EVENT DESCRIPTION AND FRoBAULE CONSEQUENCES h 10121 l During normal power operation on 10-8-80, notification was received fromi 10 l31 l the AE that the drywell equipment drain sump discharge to radwaste pip-l
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| [ TIT 1 l i ng is not seismic beyond anchor 2G11-RAD-A91.
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| Therefore, outboard con-1 fii 1T1 I t a i nme n t isolation valve 2G11-F020 is not seismically protected.
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| Jhis I
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| lo lc ] I means tha t prima ry containment could potentially be-breached if an i
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| Io lil l earthquake, LOCA, and f ailure of inboard isolation valve 2G11-F019 all l
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| 10 i l occurred at once.
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| This is a nonrepeti tive event.
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| I 7
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| 8' 9 60 SYSTEM
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| ==CAUSE==
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| CAUSE CO*/ P.
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| VALVE CODE CODE SUBCODE CO*.iPONENT CODE SULCODE SUBCODE lo19]
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| l Ml Al@ l B l@ l C l@ lP lI lP lE IX IX l@ l Al@ LZ_J @
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| 7 8
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| 9 10 11 12 13 18 19 20 SEQUE NTI AL OCCL'R R E NCE HEPOHT HLVISION g g.qg EVENT YE AR REPORT NO.
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| U)DE TYPE N O.
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| O,"(g.g; I 81 01 l-l '
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| l 11 31 9J l/l l Ol 11 lTl l-l l 0l
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| __ 21 22 23 24 26 21 26 29 30 31 32 TANET A 1 N O Pt T-f L1 O HOURS S [ i F F u.
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| S PPti MAN f LTi>RER (D l G l@[F_J@
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| 33 34 35 3G 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li 101 IThe even t is due to anchor 2G11-RAD-A91 not being in the original designi
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| [ TIT 1 l l o c a ti on.
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| This appears to be an installation error.
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| Corrective action I is121lhas been the issuance of a standing order to close valve 2G1:-F018 in I
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| li131 l the concurrent event of an earthquake and LOCA.
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| A design package is I
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| li ta l l expected f rom AE to restore seismic capability to this pipe.
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| I 7
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| E 9 80 TA
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| % POWEH O1 HE H ST ATUS ISC Y
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| DISCOVE RY DESCRIP110N LthJ LrJO IOl9I8l@l NA l
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| [D_j@l Notification from AE I
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| AC TIVI T Y CO LENT Hr LE ASE D OF HELE ASE AMOUNT OF ACTIVITY LOCATION Of F1EL E ASE li 101 LzJ @ LzJ@l NA l
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| l NA l
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| s 6 3 10 11 44 45 80 PEGSONNE L f EPOSUHLS NL'Uof H TYPE DE SCRIP TION l i i il 101 01 Oj@l ZI@l NA l
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| n H sov.J',N, A S N o.,n c H nE SCH.P T ION I01010181 NA I
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| h 9 11 12 80 t 055 Of On D AMAGE 10 F ACIL ITV 14PE Ot SCHIP110N [T
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| l Zl@l NA l
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| 7 8 9 10 80
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| i.
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| ..V 4
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| 2
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| :- LER #:
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| 50-366/1980-139 Licensee:
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| Georgia.Fower Company Facility Name:
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| Edwin I.
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| Hatch Docket #:
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| 50-366
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| =Narrative=
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| Report for LER 50-366/1980-139 4
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| 4 l
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| During steady state power operation -(at 2393 MWt) on 10-8-80~,
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| notification 'was received' from the AE that the drywell 4
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| equipment drain sump discharge to.
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| radwaste ~ piping is not scismic beyond anchor' 2Gll-RAD-A91.
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| This was determined by computer reanalysis of the piping following surveillance walkdown per IEB 79-14.
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| Therefore, outboard containment isolati.on valve- '2Gil-F020 is~ not seismically supported _ such that. p r im ary ' ' c on t a inm e n t integrity could be-degraded by an earthquake.
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| This is a nonrepetitive event, and there -was no effect upon public health or safety as a result of this event.
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| j Continued operation in the present condition can be justified as follows unt'il:t.he fix can be made:
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| l 1
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| 1.
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| a seismic event would. be required to potentially cause i
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| the loss of 2Gil-F020;
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| . %)
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| 2.
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| the containment isolation valves 2Gil-F019 and 2Gil-F020 i
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| close on high drywell
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| : pressure, main steam line low pressure,'or low reactor water Icvc1; i
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| .3.
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| in case 'of a single active f ailure of the inboard valve
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| :2Gll-F019 remote manual isolation capability is provided i
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| .by the'in-containment-valve 2G11-F018; 4.
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| the-probability of a concurrent seismic event, a -LOCA, 4
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| and a
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| singic active failure of valve 2Gil-F019 is extremely remote.
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| In addition, remote manual capability for the line.is still-provided.
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| Note' va lve s ' 2Gil-F019 and 2Gil-F020 were erroneously reported in 'our fprompt notification and telegram as being normally l-closed.
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| e f
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| The
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| ==cause==
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| of the piping not being. seismic is that anchor.
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| 2Gil-RAD-A91 is not in-the original. design location.
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| This.
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| appears to-be -the result of_-installation error and is a
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| nonrepetitivo event-Immediate corrective action consists of the:
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| issuance off standing order 80-52 which contains'
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| . ins truc tions to
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| 'close-in-containment valve 2Gil-F018 to-1 isolate-the linc 'in the ' concurrent event of an earthquake and LOCA.
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| Site is presently awaiting a design package from the AE so 'that a design. change request can L be initiated to restore seismic capability to th i s-' pipe such that valve ~2Cll-F020 will the scismically' supported.-
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| i-u
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| )
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| w, a.
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| }}
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| {{LER-Nav}}
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