ML18142B246

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LER 1976-026-00 for R. E. Ginna, Unit 1, Controller Output for Cv Spray Naoh Valve 836A Was Less than 10 Ma
ML18142B246
Person / Time
Site: Ginna Constellation icon.png
Issue date: 12/08/1976
From: Edgar E
Rochester Gas & Electric Corp
To:
Office of Nuclear Reactor Regulation
References
LER 1976-026-00
Download: ML18142B246 (4)


Text

LER 76-26/3L I

CONTROL BLOCK:

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LCENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE Jog LN¹ R E G 1 0 0 0 0 0 0 0 0 0 . 4 1 1 1 1 L0003~I

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7 89 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT OATE. REPORT OATE

[oaf coNv ~L ~L 0 5 0 0 2 4 4 1 1 1 6 7 6 1 2 0 8 7 6 7 8 57 58 59 i 60 61 68 69 74 75 80 I

EVENT DESCRIPTION fpP~J During routine control board surveillance of status of safeguards valves it was noticed 7 8 9 80 that controller output for CV spray NaOH valve 836A was less than 10 ma. Redundant I

7 89 80 controller was operable. Controller YlC836A was removed to replace overheated bias 7 8 9 80 board. Next day after return to service, controller was again found inoperable.

7 8 9 80 IOOI Soldered joint was repaired. (Reportable Occurrence 76-26, 30-day) .

7 8 9 PAME 80 SYSTEM CAUSE COMPONENT COMPONENT COBE CODE COMPONENT CODE SUPPUER MANUFACTURER VIOLATION

[oa~] ~SS E N S T R U N F 1 8 0 N 7 8 9 10 11 12 17 . 43 47 48 CAUSE DESCRIPTION

[oOs] On 1 l/16/76 two capacitors consisting of 2 banks of 3 capacitors each had broken down 7 8 9 80 tOOI and a resister had opened due to acid leakage from the failed capacitors. The controller 7 8 9 80 Qio] is a Foxboro model 62H-2E (special), 118 v 60 hz 14 w (cont'd. on attached sheet) )

7 89 80 FACILITY METHOO OF STATUS =-

% POWER OTHER STATUS OISCOVERY DISCOVERY DESCRIPTION E ~10 O NA b ~

0 r. surveillance of safet s stems 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY COATENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE Pg ~E 'E NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 0-4 7

~o~OO 89 O

11 PERSONNEL INJURIES NUMBER E

12 13 OESCRIPTION nnIi 0 ~ot rol l.'.";e~

n I o66 3~

Of DOCIimenl':

80

~4 ~00 0 NA B~GUL4TGRY DOCKET Flg 7 89 11 12 80 OFFSITE CONSEQUENCES

~15 NA .

7 89 80 LOSS OR DAMAGE TO FACILITY TYPE OESCRIPTION K~I L~J NA

-7 8 9 10 80 PUBLICITY NA 7 89 80 ADDITIONAL FACTORS

~18 NA 7 89 80 7 89 80 NAME' E. C. Edgar -546-2700, ext. 291-223 GPO 86I 66T

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jL Licensee Event Report Reportable Occurrence 50-244/76-26 Cause Descri tion (cont'd.)

10'-50 ma output proportional controller. With the new bias board installed, the controller was reinstalled. The controller action was checked in MANUAL and AUTO modes and found to respond properly.

On ll/17/76 a poor cold soldered joint was found on a wire connected to the proportional band potentiometer. After resoldering this joint, the con-troller was bench tested for an hour before reinstalling. The controller action was checked in MANUALand AUTO modes and found to respond properly.

CAR 1108 was issued for this event.

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