05000348/LER-1979-011-03, /03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested

From kanterella
(Redirected from ML19283B776)
Jump to navigation Jump to search
/03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested
ML19283B776
Person / Time
Site: Farley Southern Nuclear icon.png
Issue date: 03/14/1979
From: Hairston W
ALABAMA POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19283B767 List:
References
LER-79-011-03L, LER-79-11-3L, NUDOCS 7903190310
Download: ML19283B776 (1)
v • d • e


LER-1979-011, /03L-0 on 790221:while Doing FNP-1-STP-28.7,LOSP B1F Sequencer Failed to Meet Time Requirement for Picking Up Step 6.Caused by Agastat Timer Setpoint Drift.Agastat Timer Adjusted & Satisfactorily Retested
Event date:
Report date:
3481979011R03 - NRC Website
v • d • e

text

U.S. NUCLEAR REGULATORY COMMISSloN NRC FORM 3GG LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

~

6 lod _J l Al LI Ji Ml Fl 1l@15l 0l 0l -l 0l 0l 0l 0l 0l -l 0l 0l@l 4l 1l 1l 1l 1l@l l

l@

8 9 LICENSEE CODE 14 LICENSE NUMBER 25 26 LICENSE TYPE JO 67 CAT 58 CON'T 5oM l L@l 01 5l 01 0l Ol 3l 4l 8l@l 01212 l1 l 7 l 9 l@l 0] 3l 1l 4l 7l 9l@

10 1

7 8

60 61 DOCKET NUMBER 68 63 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROSABLE CONSEQUENCES h l At 1125 on 2-21-79, while performing FNF-1-STP-28.2, the LOSP B1F Sequencer failed g

o 2

l to meet the time requirement for picking up step 6.

Tech. Spec. 3.8.1.1 requires o

3 separate independent diesel generator sets and sequencers to be operable. Tech.

g tw l o I.: J l Spec. 3.8.1.1 action statement requirements were met.

An evaluation of agastat g

o s

l timer. problems is being performed. The health and safety of the general public were g o

s g not affected. Similar occurrences were reported in LER's 79-001/03L-0, 78-020/03L-0,,

o 78-074/03L-0 and 77-037/03L-0.

]

o g

OE CODE SUSC OE COMPONENT CODE SUSC D'E SU E

lE lE l@ y@ l Xl@ l Rl El Ll Al Y l Xl@ lM l@ ]@

o 9

7 8

9 10 11 12

, 33 18 19 20 SEQUENTI AL OCCUR R E NCE REPORT REVISION LER EVENT YEA R REPORT NO.

CODE TYPE N O.

@,ar g/ROl719l l-l l 0 l1l 1l l/l l0l3l lL {

[---j u

_2n 22 23 24 26 27 28 29 30 38 32 8.'

T KEN AC ON ON PL NT ET HOURS SB IT FOR? b B.

SUPPLIE MANUFA URER l E ]@l Z l@

l Z l@

lZ@

l0l0l0l0l W@

lN]Q lAl@

Al 1l 0 9[g 33 34 35 36 3/

40 44 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS i

o l The anastat timer setpoint for the LOSP B1F Secuencer drifted above the setpoint l

i i

l (31.9 sec. actual vs. 25 I 2.5 sec. required) for picking up step 6.

The seastat I-l timer was adjusted and a satisfactory retest per the applicable portion of l

[,l7; i

3 [ FNP-1-STP-28.2 was performed. Diesel Generator 1-2A was restored to an operable l

i 4

l status at 1445 on 2-21-79.

l 7

8 9 80 STA S

% POWE R OTHER STATUS dis O RY OtSCOVERY OESCRIPTION NA-l l

l@l Performance of-STP.

l d@ l 0l 9l 0l@l i

5 ACTIVITY CO TENT RELEASED OP RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE NA l

l NA l

I1IGl d@

Zl@l PERSONNEL EXPOSURES nut / B E R TYPE

DESCRIPTION

l0l0l0l@lZl@l NA l

i 7

PERSONNE'L inau' RIES NuvaER DESCRtPTION l0l0l0l@l NA l

1 4

7 8 9 11 12 80 tis ' "fS#?T ?

'^c" @

^

( T97 I Z l@l E

Ii NA l

7 8 9 10 80 l'.;SU]E @ DESCRIPTION 0 3 (eg o3;c3 g

gg ggg

;ggllg LN l

NA 2

o 7

8 9 to 68 69 60 ~

W. G. Hairston III pson (205) 800-5156 E

s;...e n n eo m u

Retrieved from "https://kanterella.com/w/index.php?title=05000348/LER-1979-011-03,_/03L-0_on_790221:while_Doing_FNP-1-STP-28.7,LOSP_B1F_Sequencer_Failed_to_Meet_Time_Requirement_for_Picking_Up_Step_6.Caused_by_Agastat_Timer_Setpoint_Drift.Agastat_Timer_Adjusted_%26_Satisfactorily_Retested&oldid=4837628"