05000306/LER-1979-029-03, /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

/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: 05000306/LER-1979-029, Forwards LER 79-029/03L-0 05000306/LER-1979-029-03, /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
References
LER-79-029-03L, LER-79-29-3L, NUDOCS 7912030202
Download: ML19260A756 (1)

LER-1979-029, /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

Event date:
Report date:
3061979029R03 - NRC Website

text

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NOV 27 1979 Rcroo. -

(7-77) 1 C C, OCbI LJL UJF6 LICENSEE EVENT REPORT CONTROL BLOCK: l l

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l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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0 o i LICENSEE CODE 14 LICENSE NUMBER 26 26 LICENSE TYPE Jo 67 CAT 58 7

8 9 CON'T [0] Q 0l5 0 l0 l0 3l0l6 @l11110 217 l9 hl l l 1 l 3 l 0 l 7 l g l@

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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

the overspeed trip valve for No. 11 Pump was also tripped. Redundant pumps were l

o 4 0 6 l operable. No ef fect on public health and safety.

l 10 is l l l

0 7 l l

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80 7

8 9 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUSCODE COMPONENT CODE SU8 CODE SUSCODE h Wh Wh V lA lL lV lE X lh Wh W h O 9 lC H

7 8

9 10 11 12 13 18 19 20 SEQUE NTI AL OCCURRENCE REPORT REVISION LE RrRO EVENT YEAR REPORT NO.

CODE T'PE NO.

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22 23 24 26 27 N

N 30 41 32 K N AC ON P NT ME HOURS S

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37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 i o l Cause unknown. Valves are being checked for proper position every four hours. A I

Design Change has been initiated to provide " valve tripped" annunciation in the 1

i i l control room.

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% POWE R OTHER STATUS Dis OV RY DISCOVERY DESCRIPTION

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b h! Surveillance Test and insoection 1 5 ACitVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l

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8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUM8ER TYPE DE SCRIPTION l 0 l 0 l 0 l@l Z l@l NA l

i 7 PERSONNE L INJURIES NUM8En

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8 9 11 12 80 LOSS OF OR OAMAGE TO FACILITY OO O

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