05000324/LER-1981-062-03, /03L-0:on 810704,control Rod Failed to Have Full in Position Indication Lights Lit When Fully Inserted.Caused by Failed Reed Switch Located in Drywell.Switch to Be Repaired During Future Outage

From kanterella
(Redirected from ML20009H639)
Jump to navigation Jump to search
/03L-0:on 810704,control Rod Failed to Have Full in Position Indication Lights Lit When Fully Inserted.Caused by Failed Reed Switch Located in Drywell.Switch to Be Repaired During Future Outage
ML20009H639
Person / Time
Site: Brunswick Duke Energy icon.png
Issue date: 07/28/1981
From: Pastva M
CAROLINA POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009H635 List:
References
LER-81-062-03L, LER-81-62-3L, NUDOCS 8108100312
Download: ML20009H639 (1)


LER-1981-062, /03L-0:on 810704,control Rod Failed to Have Full in Position Indication Lights Lit When Fully Inserted.Caused by Failed Reed Switch Located in Drywell.Switch to Be Repaired During Future Outage
Event date:
Report date:
3241981062R03 - NRC Website

text

.-

(7-7W U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

j (PLEASE PRINT On a."E,.mL REQUIRED INFORMATION) o i

e i

}o lil lN lC lB lE lP l2 l@l0 l0 l-l0 l0 l0 l0 l0 l-l0 l0 l@l4 l1 l1 l1 l1 j@l l

l@

7 8 9 LICENSEE CODE 14 15 LICENSE NUM8ER 25 26 LICENSE TYPE J0 57 LAT$8 CON'T l0lil

$$"R$ l L l@l0 l 5 l0 l-l0 l3 l2 l4 @l0 l7 l0 l4 l8 l1 l@l 017 l 2 l 8 l 8 l 1 l@

7 8

60 61 DOCK ET NUV8 ER 68 69 EVENT DATE 14 7S REPORT DATE 80 EVENT DESCnlPTION A*.D PROB ABLE CONSEQUENCES h I o I 2 I lDurinn normal surveillance it was discovered that control rod 14-27 did not have l

D TT] l full-in position indication lights lit whig fully inserted. All other position indi-l lo14l! cations,iucluding full-out, for the rod were operable.

The rod was then bvpassed in l

[oISI lthe rod Sequence Control System in accordance with technical specifications.

This l

1016 I levent did not af fect the health or safety of the public.

l

?

10171 l l

101811 Technical Specifications 3.1.3.7, 6.9.1.9b 7

8 9 l

SYSTEM

CAUSE

CAUSE 80 CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE COUP.

VALVE 10191 11IBl@ U @ W @ lZlZlZlZlzIz18 W @ G @

7 8

9 10 11 12 13 18 19 20 SEQUENTI AL OCCURRENCE REPORT REVISION LER RO EVENT YEAR REPORT NO.

CODE TYPE NO.

@ RE QRTl8l1l l_l l 0l 6l 2l l/l l0 l3 l lL l b

y

_ 21 22 23 24 26 21 28 29 JU 31 32 TA E CT O O PLANT ETH HOUR 3 22 S B IT D FOR1 UB.

S PPLIE MAN FACTURER Lx J@l xl@

Iz l@

I z lO l o l o l o l I

W@

W@

INlg lGl0l8l0lg 33 34 35 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CCRRECTIVE ACTIONS l i l o j l A failed reed switch located in the Qvwell caused this problem.

It will be repaired l lilij lduring a future outage.

A failure of an individual teed switch does not constitute a 1

,7g l safety hazard and failures are expected on an occasional basis.

i1 These switch failures l lwill continue to be repaired as required and no design modifications are planned.

lil3l l

11 1411 7

8 9 I

80 ST S

% POWE R OTHER S TA TUF b!SCOV RY Ii l5l W@ l0 l6 j9 l@l DISCOVERY DESCRIPTION NA j

lAl@l Operator Surveillance l

AC TIVI TY CO TENT RR E ASE D OF RELE ASE AVOUNT OF ACTIVITY li 16 I W @ l Zl@l LOCATION OF REL E ASE NA l

l NA l

7 8 3 10 11 44 45 PERSONNEL EXPOSURES 80 NUVBER TYPE

DESCRIPTION

l i l il l o l o l o l@l z l@l NA l

  • ' unSma',muLS DtsCnPnON@

Nuv e li 181 l o l o 10 l@l NA l

7 8 9 11 12 LOLS OF OH DAYAGE TO F ACILITY 80 TYPE D

l Z lhl ESCHiPTION i 9 NA l

1 8 9 10 SNc'cniPna@

80 mu NRC USE ONLY l2lol hl NA l

lllllllllllll}

0108100312 810728 68 69

80. a DRADOCK05000gp,ggg_

4 M. J. hm m, A.

m-

{

pggNg