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| {{Adams
| | #REDIRECT [[05000317/LER-1981-003-03, /03L-0:on 810217,engineered Safety Features Actuation Sys Channel 2D 12 Steam Generator Pressure Isolator Found Out of Spec.Caused by Transmation Isolator w/non-liner Output.Isolator Replaced]] |
| | number = ML20004D623
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| | issue date = 03/19/1981
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| | title = LER 81-003/03L-0:on 810217,engineered Safety Features Actuation Sys Channel 2D 12 Steam Generator Pressure Isolator Found Out of Spec.Caused by Transmation Isolator w/non-liner Output.Isolator Replaced
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| | author name = Rizzo P, Wenderlich R
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| | author affiliation = BALTIMORE GAS & ELECTRIC CO.
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| | addressee name =
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| | addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
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| | docket = 05000317
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| | license number =
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| | contact person =
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| | document report number = LER-81-003-03L-01, LER-81-3-3L-1, NUDOCS 8106090591
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| | package number = ML20004D617
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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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| =Text=
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| {{#Wiki_filter:ii. m k LICENSEE EVENT REPORT
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| . CONTROL BLOCK: l l l l l l PLEASE PRINT OR TYPE ALL RECUIRED INFCRMATIONI l o l 3il9 l M LeCENSEE l 0 l CCODEl C l N l 1 l@15l 0LICENSE 14 l 0 lNUM8 - l J.0 l 0 l 0 l250 5260 l LICENSE
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| - l 0 lTYPE 0 l@l JO 57 4CAT l lg l 1$8 l 1 l 1 l 1 ]
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| 7 con'T lolil ,$'y Ql 0 l 510 l 010131117 l@l 68 069i 21117EVENT DATE l 811 l@l0131174 75 1918 l1 80j@
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| REPORT DATE 7 8 60 61 DOCKET NUMBER ,
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| EVENT'oESCAIPTioN AND PROB ABLE CONSEQUENCES 01o 10121 1 Ouring power' operation at 1300, discovered that ESFAS Cnannel Z0 No.12 l In tai l Steam Generator pressure 1-E/E-1023A isolator was out of specification ;
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| l O 1. ] l in the non-conservative direction (T.S. 3.3.2.1). The E/E module was re- l l O i 31 ; placed, and Channel Z0 No.12 Steam Generator pressure was back in ser- l [
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| .IO is 1 l vice at 1630. All redundant channels remained operable during this time ;
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| t lOl2ll period. This event had no impact on the public health or safety. LERs l l 0 l8 ] l ~
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| 0 *
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| ' CO I>'E"I '^TE CO - s NME . CouPONENT CODE -
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| 9 10 11 12 13 18 19 20
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| _ sE OUE NTI AL OCCURRENCE. REPORT- REvissON LE R!RO EVENT YEAR REPORT NO. CODE TYPE N O.
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| @ aE#''m E T l 81 11 22 1-1 23 1 0l 01 31 24 26 1/l l 0l 3l lLl l-l l0 l
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| _ 21 27 28 29 30 31 32 K N ACT ON ON P ANT MET O HOURS s9 i O FC B. SUPPLIER MAN FA TLRER l33A ]gl34F [ g l5Zl@
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| 3 l Zjg 36 3l7 0l 0l 0l 0l 40 l Yl g ' l Yl g l Al @ lT !2 l8 l7- [@
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| 41 42 43 44 47 CAUSE CESCRIPTION AND CORAECTIVE ACTICNS ,
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| lil0ll Transmation Isolator (2301T) 1-E/E-1023A was found to have a non-linear- 1 i s ii i l' outout. It was replaced with a spare. The instrument would have allowed I i ,121 I one of four Steam Generator Low Pressure Block bistables to reset at I gii3 l less tnan 685 osia reouired by Technical Soecifications. Facility Chance 1 i,isi 1 30-25 will modify these isolators to increase their .eliability. I
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| 'sTi'MTs' s,0wER OTsER status @ Dis 5NY DISCOVERY OEsCaiPT ON I i j s ] (_Ej@ l1 l 0 l 0 l@l NA i l"A l@l Ooerator Observation l A!rn eTv CO'" TENT
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| .E t E asE D F RELE AsE AMOUNT OF ACTIVITY LOCATION OF RELEASE
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| ' lg l 8Z9 l(@ l Z lgl 7 to 11 NA 44 l l es NA l 80 PERSONNE L Ex80suRES
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| .guveER TYPE DESCRIPT;ON l i l 2 l l 0 l 0 l 01@l Z l@l N l
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| ' ' * ,1,.So,.NEl'im'4 Es -
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| NU.,. E R ~ DEsCai,TiO~@ ,
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| lilaJ8 i 9010101@l 7 11 12 NA i 80 LCts 08 088 OAM AGE TO F ACIL:TV 4 T**E CEsCRIPTON i 9 NA j y 8 9 l Z l@lto 80 t g$.3 CR 77aON e
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| [g l N f@Osl NA I IIlllIIIl1IIli 7 8 9 to 68 69 80 -
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| R.L. 'iendarlich/P.G. Rizzo ,,0 y g. (301) 269-4776/47'36 2
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| - 810 6 09 0 % pagging, __ _ __
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| s .
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| O*
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| ^
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| LER NO. 81-03/3L -
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| DOCKET NO. 50-317 ,
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| LICENSE NO. OPR-33 EV".NT DATE 02-17-81 REPORT DATE 03-19-81 '
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| ATTACHMENT r
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| CAUSE DESCRIPTION AND CORRECTIVE ACTIONS (CONT'D) ;
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| Transmation Isolator (Model 230lT)1-E/E-1023A was found to have a non- l linear output af ter plant operators noted a deviation among indications of [
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| Steam Generator #12 Pressure. .
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| i As found readings showed its effect on the Channel ZD No.12 Steam Generator Low Pressure Trip bistable was negligible. Hewever, in the ;
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| range of the No.12 Steam Generator Low Pressure Block bistable, its i
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| output was high such that the Channel ZD Block bistable would have reset -
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| approximately 13 psia below its limit.
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| j The blocking function is enabled by a 3 of 4 channel trip matrix and is !
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| removed automatically'when 2 of 4 channels are reset. Technical Specifications require the automa+ic removal of the Block (or Bypass) [
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| function at or above 685 psia Steam Generator Pressure, A facility change (No. 80-25) will be performed on this and similar instruments to increase their reliability. The change replaces capacitors with high failure rates with more durable components.
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