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| {{Adams
| | #REDIRECT [[05000317/LER-1981-024-03, During Routine Shutdown, MSIV 12 Closing Time Exceeded Tech Spec Limit.Caused by Nonsteel Ring Binding Stem.Ring Replaced.Purchase Spec Revised]] |
| | number = ML20027C835
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| | issue date = 05/01/1981
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| | title = /03L-0:on 810404,during Routine Shutdown,Msiv 12 Closing Time Exceeded Tech Specs.Caused by Contamination of Valve Actuation Sys Hydraulic Fluid Resulting in Sticking Check Valves.Finer Filters Will Be Used
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| | author name = Davis S, Weir P
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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-81-024-03L, LER-81-24-3L, NUDOCS 8210270280
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| | package number = ML20027C834
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 1
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| }}
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| {{LER
| |
| | Title = /03L-0:on 810404,during Routine Shutdown,Msiv 12 Closing Time Exceeded Tech Specs.Caused by Contamination of Valve Actuation Sys Hydraulic Fluid Resulting in Sticking Check Valves.Finer Filters Will Be Used
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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 = 05000317
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| | LER year = 1981
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| | LER number = 24
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| | LER revision = 3
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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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| (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATIONI t
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| 26 Lac 4Nat tvet 40 67 CAI $8 41
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| 'S nEPORT DATE 4.3 I
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| p.- EVENT DESCR'PTION AND PROBABLE CONSEQUENCES h'8 4
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| . u 2 l ourina a routine shutdowr., the operator noted that #11 MSIV closino tire l
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| I L.-
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| 4 o 3.I acceared to be excessive. A subscouent test revealed All MSIV shut with-1
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| El in the reouired time, hcuever. il2 MSIV closina time exceeded the maxi-l P4 rnum at 7.4 sec. (T.S. 3.7.1.5).
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| =12 MSIV was reoaired ar.d returned to I
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| ~ 3 r i W a..r g-Un 's:
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| service at 0140 on 4-8-81.
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| Sil.cc the valves were not reouf red for coer-I
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| ,gI ation at the time of disccverv the safety of the cublic was not affected.
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| LER 81-07 (50-318) describes a siniidr event.
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| 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I
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| Contamination of the hydraulic fluid in the valve actuation system has I
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| I i l caused the system's check valves to stick and delav the transmission cf I
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| hgl hydraulic oressure to the actuator.
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| Ihree more filter rins will be our-1 yl chased omvidina suoOlerental filterinn for each MSIV. Finer filters l
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| }}
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| {{LER-Nav}}
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