05000366/LER-1980-078-03, /03L-0:on 800419,while Performing Leakage Control Sys Test,Initiation Permissive Contacts Failed to Open. Caused by Relay Failure.Relay Was Replaced & Retested W/ Satisfactory Results

/03L-0:on 800419,while Performing Leakage Control Sys Test,Initiation Permissive Contacts Failed to Open. Caused by Relay Failure.Relay Was Replaced & Retested W/ Satisfactory Results

ML19323C964
Person / Time
Site:	Hatch
Issue date:	05/12/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19323C961	List: 05000366/LER-1980-078, Forwards LER 80-078/03L-0 05000366/LER-1980-078-03, /03L-0:on 800419,while Performing Leakage Control Sys Test,Initiation Permissive Contacts Failed to Open. Caused by Relay Failure.Relay Was Replaced & Retested W/ Satisfactory Results
References
LER-80-078-03L, LER-80-78-3L, NUDOCS 8005190473
Download: ML19323C964 (2)

LER-1980-078, /03L-0:on 800419,while Performing Leakage Control Sys Test,Initiation Permissive Contacts Failed to Open. Caused by Relay Failure.Relay Was Replaced & Retested W/ Satisfactory Results

Event date:
Report date:
3661980078R03 - NRC Website

text

NitC f OftM 366 v.m

. LICENSEE EVENT REPORT.

6005190473 (PLE ASF PRINT Oil TYPE All. REQuiltLD INFORMATIONI Coninot cloCn: [

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69 61 DOCKLT fJUf4ttEn 6El 63 LVENT OATL d4 7:s HEPOiti OA1E 80 cvcN r ot:Cn:PiloM AND PRoDABLL CLNSEQUENCLS h l o l 2 l l'di th the unit in cold shutdown, while performing the MSIV leakage controll lo jal Isys tem LSFT per lii1P-2-3016, relay 2E32-K33B was de-energized to simulate l 8 lhigh steam line pressure.

The system initiation permissive contacts i

iOls]I ailed to open and prevent sys tem initiation.

Backup contacts were i

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ITTcl lavailable to prevent opening of bleed valves.

This event posed no' threaj I

l0l7}[to public health or ' safety.

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lAl110l9l@.1 34 3's 3G 37 40 41 47 43 44 47 33 CAUSC DESCRIPTION AND COT:nEC1tVE ACTION 3 h ly]oj lCause of this event was failure of the relay.

The cause of relay fail-1 11 J ij lure is unknown.

This is a nonrepetitive occurrence.

The relay was ren-1 E

rio further corrective l

Jg l laced and retes ted wi th satisf act-ory resul ts.

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_I ITTT1 la cti on i s requi red.

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NAME OF PHCPAltLit s

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50-366/1980'-078-Licensce:

Georgia power Company Fac il i ty finne :

Edwin I.

Untch nocket #:

50-366 l

Narrative

Report for LER 50-366/1930-078 y

With the unit in cold

shutdown, while performing the ?!S T v lenkage contcol systen LSFT per 11H P 3 016,

reiny 2E32-K3311

(

uns de-energized to simulate high steam line, pres sure.

'P w o

.losed uhen they were supposed to contacts of this retny stuck c

open.

Opening of these contacts vould have prevented energizing on relay 2 E '12 -K 4 P., which in the system initiation rclay.

The intent of this logic in to' prevent the ve'ense of stenn to the reactor building, if the stenn line pressure is i

above 35 psIC, by preventing the opening of the hiced valves.

I Two other contacts of relay 2E32-K333 will open on reiny I

de-energization to provent energizing of relay 2E32-K5n.

This will also prevent openine, of the biced valves.

These contacts were functioning properly.

Thus, the s i n g 1. c failure of the other contacts did not cause nn.y threat to public henith or sa fety.

The cause of failure of these relny contacts is unknown.

The reiny uns repinced and retested prior to startup.

All contacts of the new rciny functioned properly.

This is a

non-repetitive occurrence.

The unit is now in full compliance no further reporting is required.

with requirements.,,and 6 e t

e J

v e

4 9

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