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| {{Adams
| | #REDIRECT [[05000348/LER-1978-088-03, /03L-0 on 781125:Train a River Water Pumps Were Found in Tripped Condition & Could Not Be Started from Control Room.Cause of Occurrence Is Undetermined]] |
| | number = ML19224D810
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| | issue date = 07/09/1979
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| | title = /03L-1 on 791125:train a River Water Pumps Found Tripped & Could Not Be Restarted from Control Room.Caused by Moisture in Switch Box.Condulet Sealing Fittings Installed on Switch Box to Prevent Water Accumulation.Design Changed
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| | author name = Hairston W
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| | author affiliation = ALABAMA 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 = 05000348
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| | license number =
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| | contact person =
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| | document report number = LER-78-088-03L, LER-78-88-3L, NUDOCS 7907170071
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| | package number = ML19224D791
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| | document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
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| | page count = 3
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| }}
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| {{LER
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| | Title = /03L-1 on 791125:train a River Water Pumps Found Tripped & Could Not Be Restarted from Control Room.Caused by Moisture in Switch Box.Condulet Sealing Fittings Installed on Switch Box to Prevent Water Accumulation.Design Changed
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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 = 05000348
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| | LER year = 1978
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| | LER number = 88
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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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| o I: [At 0625 on 11/25/78 Train A river water ( 9'a o m s men nM m na en so in,
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| gigl I condition and could not be started from the Control. Room.
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| The oymos were operat o la l local control.
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| T/S 3.7.5 requires both RW loops operable. The Train A RW pumos wet a,.,, l returned to an operabia status at 0726 on 11/25/78. T/S 3.7.5 action statement 2 is j gequirements were met.
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| The Traia B RW nunOs were coerable. This occurrence had no f
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| leffect on the health and safety of ae public.
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| ==CAUSE==
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| CAUSE C Ov P.
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| 30 31 32 ACTIC' FUTURE EFFECT SMU T O N. ;N A T* ACW E N T NP n O-.s PRIME COMP.
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| 4; cme oarcnierioN ANo ccAatcnvE Actions h i
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| a jAn investigation determined that the LS-511 fault was caused by moisture accumulation l
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| {in the switch box.
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| Crouse-Hinds condulet sealine fittings have been installed on the f i
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| i
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| ;swicch box to prevent water accumulation.
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| Also, a design change regarding RW pump l
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| l operation f rom the ''ain Control Board under LS-511 f ault conditions has been accomplislted
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| G. Hairston, III (205)S99-5156
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| ALABAMA POWER COMPANY JOSEPH M. FARLEY NUCLEAR PLA.'iT DOCKET No. 50-348 ATTACHMENT TO LER 78-088/03L-1 Facility:
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| Joseph M. Farley Unit 1 Report Date:
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| 7/9/79 Event Date:
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| 11/25/78 Identification of Event:
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| Train A River Water Pumps could not be started from the Control Room.
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| ==Conditions Prior to Event==
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| The ur it was in Mode 1 (100*4 power).
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| ==Description of Event==
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| At 0625 on 11/25/78 Train A River Water (RW) Pumps were observed to be in
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| ,a tripped condition and could not be started from the Control Room. The pumps codld be operated in local control. T/S 3.7.5 requires both R.W.
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| loops operable. The Train A RW pumps were returned to an operable status at 072U on 11/25/78.
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| T/S 3.7.5 action statement requirements were met.
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| The Train B RW pumps were operable.
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| Designation of Apparent Cause:
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| Immedia:cly prior to this incident one Train A RW pump was in "Run", the other tuo pumps were in "Autc".
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| Service pond Icvel switch, LS-511 (Upper Linit Svitch), was actuated on a high level.
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| When the pond level dropped, the upper switch did not clear and the pumps were prevented from starting when the low level switch was actuated.
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| This also caused the running river water pucp to trip.
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| An investigation determined that the failure of LS-511 was apparently caused by moisture accumulation in the switch box.
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| Analysis of Event-Service pond tvel switch, LS-511, starts the Train A RW pumps when in
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| " Auto" in order to maintain the service Iond level.
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| The sersice po.d level was within Tech. Spec. limits at the time of the cccurrecce, also the Train 3 River Water pumps were operable. The Train A River Water pumps were restored to an operable status within the time limits npecified in Tech. Spec. 3.7.5.
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| The health and safety of the general public were not affected by this occurrence.
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| b
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| LER 78-083/03L-1
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| ==Corrective Action==
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| A.
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| A test procedure was developed and performed in an attempt to simulate the condicions reported in this LER. The results of this test were inconclusive.
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| However, further investigation determined that the LS-511 fault was caused by moisture accumulation in the switch box.
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| Crouse-Hinds condulet sealing fittings have been installed on the LS-511 switchbox to prevent water accumulation.
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| B.
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| Delaval-Gems, series L5-800 level switches have been installed to replace the Robershaw Controls Company Leveloc switch Model No.
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| SL-416-B1 on LS-511.
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| C.
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| A design change has been implemented which will allow the pond low level switch to override the high level switch should both actuate simultaneously.
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| Failure Data:
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| Previous failures of LS-511 were reported in LER's 77-018/03L-0, 77-019/03L-0,
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| _. s 77-044/03L-0, 77-058/03L-0, 78-005/03L-0, and 78-053/031-0.
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| }}
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| {{LER-Nav}}
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