05000324/LER-1979-093-03, /03L-1:on 791120,during Normal Reactor Startup, Rods 42-33 & 26-07 Gave Rod Overtravel Alarm When Withdrawn to Notch 48.Probably Caused by Loose Inner Filter on Drive Engaging Uncoupling Rod.Units to Be Overhauled

From kanterella
(Redirected from ML19262B975)
Jump to navigation Jump to search
/03L-1:on 791120,during Normal Reactor Startup, Rods 42-33 & 26-07 Gave Rod Overtravel Alarm When Withdrawn to Notch 48.Probably Caused by Loose Inner Filter on Drive Engaging Uncoupling Rod.Units to Be Overhauled
ML19262B975
Person / Time
Site: Brunswick 
Issue date: 01/14/1980
From: Tollison A
CAROLINA POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19262B974 List:
References
LER-79-093-03L, LER-79-93-3L, NUDOCS 8001220362
Download: ML19262B975 (1)


LER-1979-093, /03L-1:on 791120,during Normal Reactor Startup, Rods 42-33 & 26-07 Gave Rod Overtravel Alarm When Withdrawn to Notch 48.Probably Caused by Loose Inner Filter on Drive Engaging Uncoupling Rod.Units to Be Overhauled
Event date:
Report date:
3241979093R03 - NRC Website

text

d.m LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l lh (PLE ASE PRINT OR TYPE ALL REQUIRED liblFORMATION) l e

M lN lC lB lE lP l 2l@l Ol 0l -l Ol 0l 0l 0l 0l -l Ol Ol@l 4 l 11111l 1l@l l

7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE Jo 57 CATbd CON'T E

"$$"CE lL @l Ol 5l Ol -l Ol 31214 @l ll 1121 Ol 7l~ 9 l@l O f Il il 4l 8 l 0 7

8 60 61 DOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT OATE 80 EVENT OESCRIPTION AND PROBABLE CONSECUENCES h

~

l o 12 I lDuring a normal reactor startup, rods 42-33 and 26-07 gave a " Rod Overtravel" alarm l

l 1o13I lwhen withdrawn to notch 48.

I foTTl I o

s t O

6 l

0 7

l Technical Specifications 3.1.3.6, 6.9.1.9b l

o a l 80 SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CCOE SL8 CODE COMPONENT CCDE SUSCCCE SUSCODE I R I B l@ W@ lB l@ l Cl Rl Dl Rl Vl El@ lZ l@ W @

7 8

9 10 ft 11 13 id 59 20 SEOUENTI AL OCCUR R E NCE REPCRT REVISICN E R RO EVENTYEAR

  • REPORT NO.

CCOE TYPE NO.

@ y"(E l7 j9 l l-j l 0l9 l3 l l/l [0l3l

[, Lj l-l1l

._ 21 22 23 24 2G 27 28 23 JO _

31 32 kE A 7C ON PLANT M T HOURS 22 S B IT FOR EL 8.

5 PPL E VANLFA TLRER W@W@

l Z l@

lZ l@

0l 0l0 ju l {@

l Y l@

y@

Gl 0l 8l 0 g 33 J4 34 36 37 40' 41 42 43 44 47 CAUSE CESCRIPTION AND CORRECTIVE ACTIONS enccesefu11v recouoled.

The inner filter on the drive is believed to l

i o

nn*h -nas unen

,na nnangfeg the uncoucline rod. uncoupline the blade from the drive unit.

l1 11 I l ho innen [TTTI l This oniv occurs when the rod is withdrawn to the " Full Out" nosition.

These two I

recud*ed svmetrical rods. will oniv be nulled to position 46 i

i 3

i rods

,1nne uith eko r,14nn nut we. when the drive units will be overhauled.

f Li 4

l,m.<1 i, n Toen vn u

60 7

8 9 ST s

% POWER OTHER STATUS dis RV OISCOVERY DESCRIPTION d @ l0l0l0lhl N/A l

W @l Operator Surveillance l

i 5

COSTENT AMOUNT OF ACTIVITY @ l LOCATION OF REMASE @

g ACTiviTv RELEASEO OF REM ASE N/A l

N/A l

h

@l 1 6 7

8 9 to 11 44 45 80 PERSONNEL EXPOSURES NUU8f R TYPE

DESCRIPTION

NA l

U_u.I I 0101 Ol@l ZI@l

'2

,ERSONNa' ~;uLS oESCniPriON@

Nuv8ER 101010 l@l N/A l

i a 30 7

8 9 it 12 P

LOSS OF OR DAMACE TO F ACILtTY

)

TYPE C E SCRIP TION

[,gj@

N/A 9

60 7

8 9 to e

DE SCRIPTION ISSUlELs 81 N/A I

I I ll ill i l' I l li 2 o 68 69 31 5 7

8 9 to A. C. Tollison, Jr.

PHONE:

, f 919-457-9521 NAME OF PREPARER 8001220 Z

r