05000336/LER-1981-009-03, /03L-0:on 810204,plant Computer Malfunctioned Resulting in Inoperability of Pulse Counting Position Indication Sys.Caused by Circuit Card Failure in 1801 Process Controller.Card Replaced & Computer Restarted

/03L-0:on 810204,plant Computer Malfunctioned Resulting in Inoperability of Pulse Counting Position Indication Sys.Caused by Circuit Card Failure in 1801 Process Controller.Card Replaced & Computer Restarted

ML19341D449
Person / Time
Site:	Millstone
Issue date:	02/27/1981
From:	NORTHEAST NUCLEAR ENERGY CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19341D448	List: 05000336/LER-1981-009, Forwards LER 81-009/03L-0 05000336/LER-1981-009-03, /03L-0:on 810204,plant Computer Malfunctioned Resulting in Inoperability of Pulse Counting Position Indication Sys.Caused by Circuit Card Failure in 1801 Process Controller.Card Replaced & Computer Restarted
References
LER-81-009-03L, LER-81-9-3L, NUDOCS 8103050610
Download: ML19341D449 (1)

LER-1981-009, /03L-0:on 810204,plant Computer Malfunctioned Resulting in Inoperability of Pulse Counting Position Indication Sys.Caused by Circuit Card Failure in 1801 Process Controller.Card Replaced & Computer Restarted

Event date:
Report date:
3361981009R03 - NRC Website

text

.__

LICL:st' Eb i.id hUCf.T c

v' _

... me: m p1 J_ LJ._ t 4@

i,tEnErn,NTfoTvRE Au aEOu.aEoi ac.w u =

[o]j] (C,lT j,f:ij fl.j SJ 2 j({[0] 0.l - I.0_ ] 0 [0_].0_] 0 l-lDjQJ@lt h h h h.j@l.._l.] @

'7 8 9 ttCE*45E E COM 14 15 LICte.sE NWaER 25 26 LIGt *.3E I 4 pg JO 57 CAT LS L ON'T [TU]

[l;lf,'jlL ]@[ 0 l 5 l 0 l 010 l 3 l 3 l 6MI 0 12 10 14 18 11 l@bd7 b I 7]_8.J.1 ] @.

7 8

60 El CO!dE T F.*w'.'S ER 68 63 EVENT CATE 74 75 RE70HTCATE 80 EVENT DESCRIPTION AND PHoBASLE CONSEQUENCES h M [During steady state power operation the plant computer experienced a malfunction and [O 171 [was taken out of service, thus making the pulse counting position indication systemd g [ inoperable. Operations continued per Technical Specification 3d.3.3.d. Power was re_duc-!

10 Isl Led to 89 percent to monitor linear heat rate with the excore nuclear instrumentNar.____.

[0TO Lechnical Specification 4.2.1.2. Similar event LER's-77-41/3L (9/26/77); 78-12/3L T

M L(6/27/78[; 78-21/3L (9/26/78).; 78-27/3L (10/24/78): 79-_05/3L (3Dl/_79h 79-20/3_t,_(A/_1.602 80-08/3L (4/2/80) j gyg i su's CED'E sE"OSE

'S'c'E

"*"o*E su'fCi$E COvPONENT CODE CO 10 171 l I l F l @ [ E_ J @ l G l @ ll l ft l S l T l R l U l@ [X_J@ W @

7 8

9 10 511 12 13 18 19

. 20 SEQUENTIAL OCCURRENCE REFORT REvtSION L

EVENT YEAR REPORT NO.

CODE TYPE NO.

@,a'E R, ROl8 l 11

[-j 10 1 01 91 M

[013 l [L_j

[-j [0j a

ulgi

_ 21 22 23 24 26 27 28 29 30 38 32 TAK N A T OP O PL T

.ET MOURS S S ITT F R1 S.

$ PLIE MA*

A TvRER [Aj@LZj@

lBl@

IZ l@

l01010l 21 Lt1.J @

I Y l@

[A_j@

li 10 Il l0 33 34 35 36 37 40 41 42 43 44.

4; CAUSE DESCRi? TION AND CORRECTIVE ACTIONS h 9

1: 101 L ". Cailure was traced to a circuit card (P/N 5803757) in the 1801 T

ss controller. The card was replaced, the computer y

restarted and normal operations restored.

i a l 3 4 i

7 s 9 r

$7A $

% POV.ER OTHER STATUS OSO' OISCOVERY DES ~RIPTION [E_j@ [1 l 0l0 l@l llA

• l [Aj@l Operator Observation i

i s i

A TivtTY CO ITENT RELE ASED 08 'rELE ASE Amount OF ACTivlTY LOCATION OF RELE ASE

@! Zl@l f4A j

l NA i 6 7

8 9 to 13

,44 45 8C PERSON' EL EXPOSURES NUYSER TYPE DESCRIPTION 33 Io 10 Iq_j@[Z_j@l NA

! I i 2 PE RSC' 4F4E L INJURIES NU',6ER

DESCRIPTION

li la I lo lu 10 l@l NA I

I 8 9 11

.12 8'

l LOSS OF OR OAVACE TO FACILtTY Q43 TYPE DESCRe* TION V

I' l91 lz J@l 7

8 9_

NA 10 et l

12 l a l [fLj@?!7CR.,T.ON@

8.10'805 O (glO mu f7'"

l NA i

i i i i i i i i i in_;

s 65 69 8.

I L

I 8I

'A