ML19260A756

LER 79-029/03L-0:on 791102,during Surveillance Test,Turbine Driven Auxiliary Feedwater Pump Did Not Start.Cause Unknown. Valves Being Checked for Proper Position Every 4-h & Design Change Initiated

ML19260A756
Person / Time
Site:	Prairie Island
Issue date:	11/30/1979
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19260A752	List: ML19260A751 ML19260A756
References
LER-79-029-03L, LER-79-29-3L, NUDOCS 7912030202
Download: ML19260A756 (1)

Text

'

NOV 27 1979 Rcroo. - . _..- .... ...

(7-77) 1 C C, LJL OCbI UJF6 LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 l I l N l 2 l@15 - l 0 l0 l0 l0 l 0l -l0 l 0 l@ 4 l1LICENSE l1 l1 TYPEl 1 Jol@l67 CAT l@

o i 0 0 l 7 8 9 M ! LICENSEE N l PCODE 14 LICENSE NUMBER 26 26 58 CON'T o i 8

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60 61 DOCKET NUM8ER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h ITTT1 1 During surveillance test, No. 22 Turbine-Driven Auxiliary Feedwater Pump did not I o 3 istart. Overspeed trip valve was found tripped. An inspection of Unit 1 revealed l o 4 the overspeed trip valve for No. 11 Pump was also tripped. Redundant pumps were l 0 6 l operable. No ef fect on public health and safety. l 10 is l l l 0 7 l l 10isI l 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUSCODE COMPONENT CODE SU8 CODE SUSCODE 7

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_ SEQUE NTI AL OCCURRENCE REPORT REVISION LE RrRO EVENT YEAR REPORT NO. CODE T'PE NO.

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32 K N AC ON P NT ME HOURS S IT FOR 8. SUPPL M AN UF ACTU R E R Ql]@

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43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i o l Cause unknown. Valves are being checked for proper position every four hours. A I i i Design Change has been initiated to provide " valve tripped" annunciation in the 1

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$A S  % POWE R OTHER STATUS Dis OV RY DISCOVERY DESCRIPTION 1 5

(_QJh 0l 0 0lh! NA l b h! Surveillance Test and insoection ACitVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA NA 7

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PERSONNEL EXPOSURES NUM8ER TYPE DE SCRIPTION NA l i 7 l 0 l 0 l 0 l@l Z l@l PERSONNE L INJURIES NUM8En DESCRIPTION i a l0 0 0l@l NA l 7 8 9 11 12 80 LOSS OF OR OAMAGE TO FACILITY OO O TYPE DESCRIPTIO~ D D 9- i y y@l 8 9 to NA

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JESCRIPTION

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