ML19326B287
| ML19326B287 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 02/19/1976 |
| From: | David Williams ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19326B286 | List: |
| References | |
| NUDOCS 8004100659 | |
| Download: ML19326B287 (4) | |
Text
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O UCENSEE EVENT REPC7 s
CONTROL 8 LOCK.l l
l l l l
l fx (PLEASE PRINT ALL REQUIRED INFORMATION) l' i
1 8
\\
/
LCENSEE
'd LOENSE Ev0NT
-NAME LCENSE NUMBER TYPE TYPE l AlR l A l Rl Kl 1l l 0\\0 l-l 0 l 0l O! 0l 0l-l0 l 0 l l 4l 1 l1l 1l 1l l 0l3 l 01 7 89 14 15 25 26 30 31 32 T7P CATEGORY S
DOCKET NUMBER EVENT DATE REPORT DATE O 1 CONT l l
l l,,1]
l 0l 5 l 0 l-l 0 l 3 l 1 l 3l l 0l 1 l2l0l7l6l l 0l ?l1 l0 l7l6l 7 8 57 58 59 60 61 68 89 74 75 60 EVENT OESCRIPTION t
95 I noring,marteriv calibration and insnection of seisnic i nst ronenta t i on the 0.01 1
e 7 89 80 EE l ind 0.1 ninens wnro (Interminnd en he i nn n n'rn b l o _
fnunsriontinn rounn l ori nnen*
a 7 89 80 l had been turned off at nnnitncinfor nnnel.
No redundnnt system was nyniinhle.
Switch!
7 89 h ! will 80 be 7 89
~inanored en nrnvent h a i n,w turned n ff-(50-313/76-11 l
hl
~
80 l
7 89 PAME 80 SysTEu CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLER MANUFACTURER VOLATON
$ IIlFl [ ;.\\,l l ZIZ l2I Zl 2l Z]
(2J l2l9l9l9l d
7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION UE l No known reason for power beinc turned off.
Switch will be iurnered to nrevent l
7 89 80 l beine turned off.
l 89 l
80 l
89 FACluTY METHOO OF S?ATUS
% POWER OTHER STATUS DISCOVEAY DISCOVERY DESCRATON LeJ loIolsl I I
l.nj l
m n
I 7 8 9
10 12 13 44 45 48 80 A LE S OF EASE AMOUNT OF ACTMTY LOCATON OF AELEASE NA NA 7 8 9
10 11 44 45 PERSONNEL EXPOSURES 80 NUM BE A TYPE DESCRIPTON 8
UE l 0 l 0 l 0l dl NA
(
l 7 89 11 12 13 20 l
PERSONNEL INJURIES NuM0ER DESCR6PTON
)
EE l0 l 0 l O!
l NA l
7 89 11 12 59WSONSeOueNCES 80 t
l N/.
l 7 89 LOSS OR OAMAGE TO FACILITY 80 TYPE DESCArPTON Edl NA l
7 89 10 80 PUBLtCtTY
$l NA l
89 80 8 0 0 4100 EQ AOOITIONAL FACTORS 8 l NA l
7 89 80 i
l 7 89 80 NAME: Thnin1 ff. 1!i 11 i nns PHONE. f 50 ll 371 -4192
-s.
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1.,
Unusual Event' Report No. S0-313/76-1 2.
' Report Ditte: 2/9/76 3.
Occurrence Date: 1/20/76 4.
Facility:
Arkansas Nuc1 car One - Unit 1 Russellville, Arkansas 5.
Identi fication o f Occurrence:
- Alarm for a 0.1 g scismic event for Strong flotion Accelerograph inoperabic.
I.
f 6.
Conditions Prior to Occurrence:
Steady-State Power X
Reactor Power 2sm blWth llot Standby Net Output g20 h!We Cold Shutdown Percent of Full Power na 1
Refueling Shutdown Load Changes During Routine p.
Power Oper.ition
(
Routine Startup Operation Routine Shutdown j
Operation Other (specify) s-1 i.
7.
Description of Occurrence:
";I
.During quarterly calibration and inspection of the seismic instrumentation the 0.01 g and 0.1 g alarms were determined to be inoperable. An investiga-tion revealed the power had been turned off at the annunciator panel.
v
~hkirch 4, 1975' NSP-10',-Rev. 2 Page 2 of 4
=
d Unusual Event Report No.
50-313/76 8.
Designation of ' Apparent Cause of Occurrence:
Design Procedure Manufacture Unusual Service Condi; ion Including linvironmental Insta11ation/
Construction Compon.cnt Iailure Operator Other (specify)
Personnel 9.
Analysis of Occurrence:
It does not appear the alarm was inoperable prior to 1-13-76 and that an actual event of such magnitude that would have caused stresses to exceed design linits would have been felt at the plant site even though the alarns were inoperable, thus no hazard to the health and safety of the public.
i :
i i
t 4
i I
l M:rch.4, 1975 NSl>-10, Rev. 2 l'a ge 3 Of 4 e
o e
.s Unusual Event' Itepo rt. ;o.
50-313/76-1 10
' u>rr. c, i ve Ac t ion:
%c switch that was turned off wiii be jumpered out to prevent the p from being turned off in the future.
er-Since the identification of this problem the design of scismic in t tion is' being evaluated and some changes are forthcomings rumenta-were erroneously recorded at the base siab.
, since four events These changes include improved n.ounting which vents.
will be detected.
actual events a
- 11. -Rii;nce llata:
No prior failures of this type, si
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i
. Ra ren 1, ' ll'7..
NSP-10, he v..?
l'ar.e 4 o t' ;
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