ML19309F134

LER 80-013/03L-0:on 800320,while Moving Group 7 Control Element Assemblies for Axial Shape Index Control,Assembly 1 Dropped Into Fully Inserted Position.Caused by Failure of Timer Module in Coil Power Programmer.Timer Replaced

ML19309F134
Person / Time
Site:	Millstone
Issue date:	04/18/1980
From:	Bates R NORTHEAST UTILITIES
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19309F132	List: ML19309F131 ML19309F134
References
LER-80-013-03L, LER-80-13-3L, NUDOCS 8004280530
Download: ML19309F134 (1)

Text

-_ -_ _ _ _ -

, ,

LICENSEE EVENT REPORT CON Trol BLOCK: l l l l l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

. 1 6 o i [C'lT lM lN lS l2 l@l 14 15 0 l 0 l -l 0 l 0 l LICENSE 0 l 010 NUMBER l- 10 l0 l@l4 2's 26 l1LICENSE 11 l1 11 TYPE JOl@l l

$7 CAT 58 l@

7 8 9 LICENSEE CODE CON'T R

7 8

"$RE60l Ll@l0 61 l5 l0DOCKET l0 l0NUMBER l3 l3 QB l@l630 l 312 l01810 74l@l750l 41 EVENT DATE 1 l 8 I 81080l@

REPORT DATE

~ EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h a 2 i While moving group 7 Control Element Assemblies (CEA) for axial shape index control . I io g3; i CEA No.1 dropped to the fully inserted position. In accordance with Technical' I o ,, l Specifications Section 3.1.3.1, action e, thermal power was reduced to 70% within i 1 T T iog3; i 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and operation continued. Values for Tq, Fr and FX Y were monitored but I a s i no limits were exceeded. The cause of the dropped CEA was corrected and CEA No.1 l

o y,; ; was realigned with other group 7 CEA's within 30 minutes of reaching 70% power. I 1

IO Is l I ,,

" *"

' C$o'E "^T' CO $$C$$E COMPONENT COoE SueCo'dE S$$E O 9 i Rl B10l @ [E_l@ l G12 l @ l C13l R l D I R l V l E18l@ l Z_J 9 19

@ l_Z_l 20

@

7 8 11 REVISION

_

SEQUENTIAL OCCURRENCE REPORT EVENT YEAR REPORT NO. CODE TYPE N O. 1 LER/RO '

OR n l8 l0 l [ _j l0 l1 l 31 [gj 1013 l l30 Li [-j l0 l 22 23 24 26 27 28 M 31 32

_ 21 ON PL NT HOURS 22 SS IT FO lb B. SUPPLIE MANUF CTURER U@ Wg W@

K r AC 1E T

[33A jgl34Z l g

_

Wg JS

[36Z j@ l 0l 0l Dl 31 40 l

41 42 43 lE 44 l1 ]4 l6 47l@'

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O I The cause of the dropped CEA was failure of the timer module in the coil power l l

li g i l l programmer for CEA No.1. The failed timer module was replaced and nomal operation I

, , _i continued. The timer module is made by Electro Mechanics, Model E3097. I l

I i a _l 1

~

t e _1 l _J 80

7 8 9 SA S  % POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION .

i s (E_j@ ll l 010 l@l NA

• l [_A_j@l Onerator Observation I

' ' ' ' "

A!TiviTY COATENT RELEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RE LEASE 1 6 [Z_]@ NA l l NA l..

@l PERSONNEL EXPOS ES NUMtlER TYPE DESCHiPTION Ii I 7 l 10 10 10 l@Lz_j@l tir -

"

I

' * * "

PEnsONn E t iN2u'rfiES

.

NumER I

7 i a 8 9 10 10 10 11 l@oESCRiPriON@

l 12 NA 80 LOSS OF OR DAMAGE TO FAClllTV Q TYPE DESCFilP rlON v I O NA nnnAORn ^~'W

-

V"u 7 80 l 7 8 9 to

• '

.

l 2 O IS[E @DESCRIPTIONNews l release through Public Relations Department. l I l l l l 1 l l 1 I I I I2:

G8 69 80.s !

7 8 9 10

--- - - - - __fLA_fWcs _ 203-447-1791 2