05000328/LER-1983-046-03, /03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc

/03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc

ML20023B635
Person / Time
Site:	Sequoyah
Issue date:	04/27/1983
From:	Harding M, Rogers H TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20023B609	List: 05000328/LER-1983-046, Forwards LER 83-046/03L-0 05000328/LER-1983-046-03, /03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc
References
LER-83-046-03L, LER-83-46-3L, NUDOCS 8305050224
Download: ML20023B635 (1)

LER-1983-046, /03L-0:on 830401,RCS Subcooling Margin Monitor Declared Inoperable Due to Failure of Plant Computer. Computer Failure Caused by Attempt to Run Program Loaded on Faulty Disc.Program Reloaded to Different Area of Disc

Event date:
Report date:
3281983046R03 - NRC Website

text

.

- - ~ _ _

y U) ' -

LICENSEE EVENT REPORT Q

.s c.

CONTROL DLOCK: [. l l

l l

l l@

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATiONI

• * ' ~

6 [o_L'J l T l n I s i N l P'Id@l 0 l0 l-l 0l 0l 0 l 0 l 0 l - l 0 [ 0 l@l 4 l1 !1 l1 l1 l@[

l l@

7 8 9 LICErdsEE CODE le is LICENSt rauMuER 2h 26 LsCENSE TvPE JQ si C a r si,.

CON r sO,$"E l.L.j@l 015 10 J O l0 13 12 18 J@l 014 IO l Il 8l 3 }@l 0 l 4 l 2 l 7 l 8 l3 l@

IoI8I i

.I,.

8 60 65 on;EET NuvoEH f.8 69 LVENT DATE 74 7$

BEFORT DAT E 10 EVENT DESCRIPTION ANO PROS AOLE CONSEQUENCES h l

A Io i 7l. I With unit 2 in mode 1 (78% Rx power) at 1030 CST on 04/01/83, the reactor coolant -

lo !aI i system subcooling margin monitor was declared inoperable due to the plant computer Io i4 I I f a.iling.

This dvent required entry into action statement (a) o f LCO 3. 3. 3. 7.

There

.l o i 31 l was no effect up"on public health and safety. Previous occurrences - one lo !s l f~~(SQRO-5'0 328/83034).

L 10 6 7 l l lO!8j l 7.

8 9 SYST E M

CAUSE

CAUSE COMP.

VAlvs CCCE CODE'

$USCCDE CCu'ONE NT CODE SU8 CODE SUSCODE lotel I Ti cl@ LvJ@ I zi@ Iz Iz Iz Iz Iz i zl@ Iz l@ 'I zi@

2 8.

9 10 12 12 18 i9 3a SEQUENTI AL OCCURRENCE' REPORT REvtsrON LER EVENT YE AR R E P O n f tJo.

.CCDE TYPE N O,

@,ag;/Ro 1813I l-l I014161 1/l 10 ~ l3 I It I l-l 10 I g

,_2 8 22 23 2

26 27 28 29 30

_ 21 32

~

Et7 A MAN FACTURER A

T 014 O PLANT ETH O HOUR $

$ 8 (T T D FOn i US.

SUPPLI j'

..E ]'[3.l@lZl@

lZl@

lZl@

[0l0l010l- [N j@

W@

lzl@

lz [9 l9 19

, g v 22 2

2, 2.

2,

~CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 0

4. _

2 3

f..

li lo l l The' plint computer stopped when an attempt was made to run a' program-loaded on a l

.,l i t i l l' ' di'sc.' 'The faliure was ' caused by a faulty' area on the disc. The program was reloadec :

l Doe -

The disc will be

.;g i ; 2 l

to a-different area.of the disc and the computer restarted.

3..

3i;3) [

. repaired as soon as practicable. The subc6oling margin monitor was operable at i3,.[

[

1045 CST on 04'/01/83.'

o. sS e

STNit.

% POWER orHEn5TATUs tsc t DISCOVEnV CESCRIPTION l1iSI [F.j @ l0 l7 l8 l@l NA l

l B [@l Operator observation l

48riviTY CO01EnT

• • I U'

RFLE A%ED OF nELE AM AMOUNT OF ACTIVITY LOCATION OF RELEASE i

I lc l l Z l @ l Z lgl NA l

l NA i

8 9 to tt 4.

5 Si pen 50NNEL E)tPO5URES i

)

NUMeE R -

TYPE DESCRIPTION 33 l

L' L71 I o I o I o l@Lzj@l NA I

1.; + * *

,ER:0~~ E L i~,Un',Es l

l NuveE R ot scruiPTION l1 lS l l 0 l 0 l 0 l@l NA 8 9 u

u 8305050224 LOSS OF OR OAMAGE TO FACILtTY h,g3 PDR ADOCK U

TvPE C E SCRIP TION [l.[,] [ z_j@l NA g

~

5000328 j,

8,

,o pDR PU8t t lCI T Y 155UEO 4

NRC USE ONL '

I -

[,2_j.8.,J [ N,JhlDESCRipitoN NA J,.[ j l l l 1 I I ! I l l l

}

a e so ss" as -

.,;. A,.

j

..Name of Preoarer:

H. R. Rogers

/M.'R. Harding Phona: (f;15) 870-6422

' -*-.,, 7