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| {{Adams
| | #REDIRECT [[05000334/LER-1980-031, Forwards LER 80-031/01T-0]] |
| | number = ML20008E231
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| | issue date = 10/17/1980
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| | title = Updated LER 80-031/01T-1:on 800521,total Loss of Residual Heat Removal Occurred When Valves Autoclosed.Caused by False High Pressure Signal.Vent Valve Weld Leak Repaired
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| | author name = Lacey W
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| | author affiliation = DUQUESNE LIGHT 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 = 05000334
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| | license number =
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| | contact person =
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| | document report number = LER-80-031-01T, LER-80-31-1T, NUDOCS 8010240441
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| | package number = ML20008E226
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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
| |
| | Title = Updated LER 80-031/01T-1:on 800521,total Loss of Residual Heat Removal Occurred When Valves Autoclosed.Caused by False High Pressure Signal.Vent Valve Weld Leak Repaired
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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 = 05000334
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| | LER year = 1980
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| | LER number = 31
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| | LER revision = 0
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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:_
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| Report Dated 6/4/. NQCLEA3 RE2ULATCRY COMMISSION Us NaC Kam ase 80 rim Updata Rspart - Previou)
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| LICENSEE EVENT REPORT l
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| 'avtNroAfg 74 7S AtPoAr oATE 80 EVENT DESCMIPTION ANO PMo8ASLE CONSEQUENCES Oio l Upon finding a tenking Residual IIcat Remove.1 (RHR) System vent valve weld, an l
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| lo l 2l lT771lcvolution was commenced to reenergize the RHR iso 1'ation valves to permit rapid g
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| ITTT1 I isolation can ibility in case of a gross failure. A total loss of RER occurred when,
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| io esl lo,s1Ichannel. Safety 2 plications were minimal since the leakage was contained and Che
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| [TTTl l system was capable of total isolation.
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| ,,,o,lThe RHR isolation valves closed due to a false high pressure signal. The vent valve,
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| g Iweld leak vas repaired and the system returned to service. An engineerin
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| g ]has been done of the RHR and Safety Injection vent and drain installations and l
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| Attachment To LER 80-31/01T-1 Beaver Valley Power Station Duquesne Light Company Docket No. 50'334 The engineering review package of modifications is available but is too lengthy to include in this report.
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