|
|
| Line 1: |
Line 1: |
| {{Adams
| | #REDIRECT [[05000313/LER-1981-005-03, /03L-0:on 810408,steam Driver Emergency Feedwater pump,P7A,was Started & Then Tripped by Turbine Overspeed Mechanism.Caused by Worn Edges on Trip Mechanism.Mechanism Adjusted to Latch Firmly.Preventive Maint Program Revised]] |
| | number = ML20010H815
| |
| | issue date = 09/09/1981
| |
| | title = 0707 & 0806,steam Driven Emergency Feedwater Pump P7A,stated & Tripped by Turbine Overspeed Trip Mechanism.Caused by Condensation Build Up & Mechanical Vibration.Latch Mechanism Replaced
| |
| | author name = Shively C
| |
| | author affiliation = ARKANSAS POWER & LIGHT CO.
| |
| | addressee name =
| |
| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
| |
| | docket = 05000313
| |
| | license number =
| |
| | contact person =
| |
| | document report number = LER-81-005-03X, LER-81-5-3X, NUDOCS 8109290318
| |
| | package number = ML20010H799
| |
| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| |
| | page count = 1
| |
| }}
| |
| {{LER
| |
| | Title = 0707 & 0806,steam Driven Emergency Feedwater Pump P7A,stated & Tripped by Turbine Overspeed Trip Mechanism.Caused by Condensation Build Up & Mechanical Vibration.Latch Mechanism Replaced
| |
| | Plant =
| |
| | Reporting criterion =
| |
| | Power level =
| |
| | Mode =
| |
| | Docket = 05000313
| |
| | LER year = 1981
| |
| | LER number = 5
| |
| | LER revision = 3
| |
| | Event date =
| |
| | Report date =
| |
| | ENS =
| |
| | abstract =
| |
| }}
| |
| | |
| =text=
| |
| {{#Wiki_filter:.-
| |
| UPDATE REPORT - PREVIOUS REPORT DATE 8/13/81 NRC FF)Ree 364 U. S. NUCtE AR REGULATORY COAAJlsser.6 (7 77)
| |
| LICENSEE EVENT REPORT EXHIBIT A CoNTaotetoCol l I I I I l@
| |
| irtEAsE eniNT on TvPE Att aEcuintoiNroni ArioNi l AlR l Al Nl 0 l 1lgl 0 j0 l -l0 l0 l 0l 0l 0 l-l 0 l0 lgl4 l1 l 1l1 l 1lgl l lg o i 7
| |
| e 9 UCthstt Coog
| |
| ,4 is
| |
| (,cgNst svuotn 25 26 (sc t Nst s v t Je 67 C47 Se p'T
| |
| "',u% LL_J@l0 I s p 101013 l 1131@l 01410 l 81811 l@l 01910] 918 l 1l@
| |
| CON s
| |
| 8 60 69 DOCEET hum 9tR b4 M
| |
| LVENTDATE l4 FS HE,OHf Dart 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES O'o g i n 4/8/81 following a plant trip,on 7/7/81 following an inadvertent i
| |
| O m.. i actuation signal and on 8/6/81 during a surveillance test, the steam driven E Iomorgency foodwater cump. P7A. started and was subsequently tripped by I
| |
| o s i the turbine overspeed trip mechanism.
| |
| In all cases, the electric driven i LEEif. numn romained nnprahla. The trin mechanism was reset. the oumo I
| |
| o a g i ested and returned to service. Similar to LER 50-313/80-021.
| |
| Reportablej t
| |
| o pe r T.S. 6.12.1. 2. b i
| |
| *sn"
| |
| '^!#
| |
| s#M'.
| |
| #;'u,
| |
| =t, me,0~i~1 war 8
| |
| IC l HI@ LEJ@ LBj@ l T IU l R I BII I NI@ [_Z.j@ LZ_J @
| |
| .vnr,[..
| |
| t'3"!,",'e'
| |
| "'id*" N'
| |
| "' O'''"
| |
| @ =u...,o L8 f1 1 L-J l o i 01.5._J L, _j i013I [JJ L, J LiLJ
| |
| _a, n
| |
| 2 2
| |
| 1 c.
| |
| n u
| |
| T1 KEN ACT ON LA Y MET HOU5M 22 s6 7 rom H
| |
| su L MAN FA TuRER l.EJ@Lx.J@ LZJ@
| |
| liLJO I 01010 101 LN.J@
| |
| LY_J@ [A_J@ lT l 114171@
| |
| 3J 34 35 36
| |
| !s 40 el 41 43 44 4p CAUSE DESCR PTION AND CORRICOVE ACTIONS h
| |
| ! Followina the 4/8/81 event. the mechanism for initiating the nversnood I
| |
| i o EI trip was adjusted to latch more firmlv.
| |
| The 7/7/81 event indicated 1
| |
| ,, i the latch mechanism required replacement. Mechanical vibration caused i
| |
| i i i bv condensation buildun in the steam sucolv line is believed to be i
| |
| i. I the root cause of the 8/6/81 trip. Ev.aluation of the problem is con-a,$,,,,$i nui ng. Selected mechanism pg,gj)re being procured for replacement.
| |
| c oTHfMsTATUs U T*tus s,o..
| |
| DesCovf HY DiSCOV f HY of sCHI,f10N L.Ej@ l11010J@l NA l [A_j@l Operator Observation l
| |
| i *
| |
| '4!rwn, C$ri=1
| |
| 'c a
| |
| auou~r o, Criver, @ l t oc.,,o, o,,,, u.sc @
| |
| acuasio or asuass L4_1@ L7 J@l NA l
| |
| NA l
| |
| ' c
| |
| '.. sow. 'il o,osais oisca.,rio= @
| |
| =
| |
| ,,uu.
| |
| rv,.
| |
| Q l010lp@[Z_j@l NA l
| |
| ,easo=~e't'.~2u'n'ir s so orsCaierio=@
| |
| wu.ra l 0 l 0l0 l@l NA l
| |
| i H
| |
| ' ho, oa o,",ce'v'o r.ca r, g a
| |
| LaJ@l NA l
| |
| ' o
| |
| '''"Id's'C,,,,,,0 @
| |
| NRc ust outy 8,bsod, @ l NA t [ [-l l [ g g l l g Chris N. Shively hW4W AME OF PREPARER
| |
| ,ggy, f5109290318 810909 PDR ADOCK 05000313
| |
| }}
| |
| | |
| {{LER-Nav}}
| |