05000325/LER-1980-087-03, /03L-0:on 801105,control Rods 50-27 & 38-23 Exhibited Position Indication Problems.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Completed During Outage

/03L-0:on 801105,control Rods 50-27 & 38-23 Exhibited Position Indication Problems.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Completed During Outage

ML19341B236
Person / Time
Site:	Brunswick
Issue date:	12/01/1980
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19341B233	List: 05000325/LER-1980-087, Forwards LER 80-087/03L-0 05000325/LER-1980-087-03, /03L-0:on 801105,control Rods 50-27 & 38-23 Exhibited Position Indication Problems.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Completed During Outage
References
LER-80-087-03L-01, LER-80-87-3L-1, NUDOCS 8101300507
Download: ML19341B236 (1)

LER-1980-087, /03L-0:on 801105,control Rods 50-27 & 38-23 Exhibited Position Indication Problems.Caused by Defective Rod Position Indication Reed Switches.Corrective Maint Will Be Completed During Outage

Event date:
Report date:
3251980087R03 - NRC Website

text

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NEc 366 U. S. NUCLEAR REGULATORY COMMIS$10 (7 21 LICENSEE EVENT REPORT

.o CONTROL BLOCK: l l

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l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATioNi i

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8 9 UCENSEE CODE 14 LICENSE NUM8EH 25 26 LICENSE TYPE 40 Si GA T $8 CCN'T dl 015 l o l-10 l 3 ! 215 l@l11110151810 l@l 1121 Ol il 810l@

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d 60 61 DOCKET NUM8ER 68 69 EVENT DATE 74 7$

REPORT OATE 80 EVENT DESCRIPTION AND PROBAELE CONSEQUENCES O'o Io i2l l During normal operation, while verifying control rod positions, control rod 50-27 had no " full out" indication on the rod status display and control rod 38-23 g

r o,3 # l t o l 41 I lacked position indication on the rod status display and on the computer printout g

io I sl l vhile at position "02".

Similar events involving control rod position indications lo is i { were reported in LER's 1-80-25, 1-80-62, and 1-80-78.

This event did not affect g

I o 171 I the health or safety of the public.

g Technical Specifications 3.1.3.7, 6.9.1.9b l

gl 80 7

8 9 COE OE SUSC E COMPONENT CODE SU8 COO'E SU E

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JJ 34 3S 36 37 40 el 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS l1 IolI The indication eroblems ernerienced with these two reds are believed to have l

L' J ' J l resulted fro, defective rod nosition indicseinn reed Ruicch,a.

i?nvrnr e 4 v, I

ITTTl 1 maintenance for these rods vill be ecmoleted durine the next curaee of f

I1 13 I I sufficient lencth that n11nus access to the ord-nry conen4 ment.

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AI 80 7

8 9 ST

%PCWER OTHER STATUS 015 RY DISCOVERY DESCRIPTION NA l

[A_,j@l Routine Surveillance l

[.d5] d h l1lninlhl ACTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTivlTY LOCATION OF RELEASE l

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8 9 to ISSJUE @DE CRIPTION i

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8 9 to 919-457-9521 2

A. C. TOLLISON, JR.

PHONE:

NAVE OF PREPARER 8101800 gg