05000334/LER-1979-031-03, /03L-0:on 790807,during Testing of Emergency Diesel Generator Sequencing Circuit,First Loading Sequence Was Shorter than Required.Caused by Starting Point Being Off Zero.Sequencer Cycled & Adjusted to within Spec Limits

/03L-0:on 790807,during Testing of Emergency Diesel Generator Sequencing Circuit,First Loading Sequence Was Shorter than Required.Caused by Starting Point Being Off Zero.Sequencer Cycled & Adjusted to within Spec Limits

ML19253B017
Person / Time
Site:	Beaver Valley
Issue date:	09/07/1979
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19253B014	List: 05000334/LER-1979-031, Forwards LER 79-031/03L-0 05000334/LER-1979-031-03, /03L-0:on 790807,during Testing of Emergency Diesel Generator Sequencing Circuit,First Loading Sequence Was Shorter than Required.Caused by Starting Point Being Off Zero.Sequencer Cycled & Adjusted to within Spec Limits
References
LER-79-031-03L, LER-79-31-3L, NUDOCS 7909140374
Download: ML19253B017 (1)

LER-1979-031, /03L-0:on 790807,during Testing of Emergency Diesel Generator Sequencing Circuit,First Loading Sequence Was Shorter than Required.Caused by Starting Point Being Off Zero.Sequencer Cycled & Adjusted to within Spec Limits

Event date:
Report date:
3341979031R03 - NRC Website

text

,,c,oRo m.

[7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) l 6

l P,4 l B lv is l1 Ig o lo l-lo lo lo lo lo l-lo lo Igl4 lt l1 l1 l1 l@l l

Ig 0

i 8 9 LICENSEE CODE I4 15 LICENSE NUMBER 25 2n LICENSE TYPE Jo 57CATb8 CON'T

[ "c' l L @l o l 5 l o l o l o l 3 l 3 l 4 Ql 0 l 8 l0 l 7l 7l 91@l O l 9 l 0 l 7 l 7 9l@

'O i

8 60 68 00CKET NUMB ER 6d 69 EVENT OATE 74 75 REPORT OATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o

2 l During surveillance testing of the No. 1 Emergency Diesel Generator sequencing circuit,l IOTTl I the first loading sequence interval was 4.106 seconds rather than the required 4.500 l

l seconds. The health and safety of the general public was not jeopardized since the o 4 [OTT] [ diesel generator is capable of accepting full load in 3.5 seconds as demonstrated by l

0 6 l the manufacturer's 150 test. runs. Therefore, the diesel generator is capable of l

0 7 l accepting partial load at 4.1 seconds.

l O

s 1 I

7 s,

so

$YSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE OU8 CODE COMPONENT CODE SU8 CODE SUSCODE g

lE lE l@ Wh Wh l Il Nl Sl Tl Rl Ulh lC l@ lZ l@

7 8

9 to 13 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LE R/Ro EVENT YE AR REPORT No.

CODE TYPE No.

@,at=

I7l9l l-l 101311 l l/l l013I I Ll l-l Lo.1 23 22 23 24 26 27

, 28 M

30 31 32 KEN AC O ONP NT MET D HOURS

$8 IT O POR 8.

SUPPLIE MANUPACTURER lEl@lZl@

lZl@

lZl@

l 0l 0l 0l 0l l Nl@

Nl@

lAl@

l E l1 l4 l 7l@

23 34 35 36 31 40 44 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i

O I The short first interval resulted because the starting noint of the secuencer was I

i i i slightiv off zero.

The sequencer was evaled and adiusted to within specifications.

I i 2 I I

i a l I

1 4 l

l 7

8 9 80 STA 5

% POWER OTHER5TATUS dis O RY DISCOVERY DESCRIPTION ITTTl IG l@ l o f o f o I@l N/A l

l B lhl Surveillance test l

AC rivlTY CO TENT 4 mount OP ACTIVITY @ l LOCATION OP RELEASE @

REu AsEo oP RELE AsE FriT1Liu @

z!@l n/^

l N/A l

7 8 9 10 tt 44 45 13e em 80 l0l0 0 lhlTYPEZlhl N/A L!

' l!l';lOI PERSONNEL EXPOSURES Oi O l0 D

l NUM8ER DESCRIPTION 39 d

l i 7

,E R so~~ a',mu',2,i s A !-

L r:: io! nr n

l (f.

,"( Pi llJ NUMBER DE SCRIPTION (ITTll0l0l0l@l N/A

!'L U i 'i

• ~#

l 7

8 9 11 12 80 L,Oi,s OF OR OAMAGE fo FACILITY 7 9 0914 0 V7'E

,E oEsCR,,no~

$ lZl@l N/A l

7 4 9 to 80 tS S.;E DE RIPTION hl N/A l

lllllllllllIl}

7 o 7

4 9 to 68 69

80. ;;

edng 412-643-1258 g

NAME OF PREPARER PHONE: