ML20040D717

LER 82-001/03L-0:on 820102,hourly 2/3 Chimney Effluent Release Record Not Maintained for 33.5-h.Caused by Loss of Data Recall Ability Due to Microprocessor Problem W/New Chimney Monitoring Sys.Microprocessor Boards Redesigned

ML20040D717
Person / Time
Site:	Dresden
Issue date:	01/21/1982
From:	Whalen R COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040D711	List: ML20040D710 ML20040D717
References
LER-82-001-03L, LER-82-1-3L, NUDOCS 8202020181
Download: ML20040D717 (2)

Text

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LICENSEE EVENT REPORT

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6 (PtEAsE PRINT OR TYPE ALL REQUIRED INPGEMAT10N) foTil8 i 9I ! L WCENSEE Y

IDlR CCOE l S l 142 l@l 0 l 0 l - l WCENSE 15 l 0 l0 l0 l-l0l0 20@l4l1l1 0 l 0 NuMsER 28 l1 l1 l@l57 CAT UCENSE TYPE 40 l

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CON T loltl 7 8 Su'R$ 60 l L @l0 l COCKET 61 5 l0 NLs45ER l0 D l2l3!7 hl0 lEVENT 68 69 1l 0QATgl2 I 8 l2 hlnIi!9l1 74 75 I a Ia 80l@

REPORT DATE EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h 10 l a j l Durinst normal operation, i*. was discovered that an houriv 2/1 chimnav o f f i ,,an t- valanco I g ; record as required by T.S. 4.8.2.a had not been kept for the orevious 33.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />. There l gngo, gwas minimal danger to the public health and safety since the chimney menitors had contin-1 Ioisl l u us alarm capability; additionally, the Off-Gas flow rate was recorded and the Off-Gas l l o 16 l Isystem was operational. This event is the first occurrence of this type. g l o 171 I l t o ta l i I NE Yo$$ Suec$$f COuPONENT CODE SuGCOOE S of loggl 7 8 lM lC10l@

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_, SEQutNTfAL CCCuRRENCE REPCRT REVi$loN EVENT YEAR REPORT NO. COCE TYPE NO.

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31 32 NE *ACTiEd OUt ATT **w E NOuR$ @ #5s$"TTEU s POEs. s'"EuY u wA N P E RER lF Ql F l@ lZl@ lZ lh 33 34 35 34 l0l0l0l0l 37 40 l41 Nl@ lNlh d h lEIOl7l0lh 42 43 de 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h gitoll Due to a microprocessor problem with the new chimnev monitorinct system. dnen ~cnT1 cann l g,,,,l bility was lost. The old system was immediately placed back in service. Rodanionaa I g microprocessor boards were installed and redundant chart recorders will be installed in I

,,,,, g order to prevent any future recurrence. l l i l 41 1 I 7 s 9 80

% POWER OTHER STATUS 1 RY olSCOVERY QESCRIP flON l1 15e l W@ l 0 l 9 l412l@l N/A l l Alhl Discovered by Health Phvnic4se l 7

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NAME OF PREPARER- PHONE:

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DEVIATION REPORT O Commonwealth Edison P ART t l T l TL E O F DEVI ATION ovR m.

12 - 2 STA UNIT Failure to Maintain an Hourly

- 82 YEAR 1

NO.

OCCURRED Station Record of 2/3 Chimney Release l-2-82 0130 SYSTEM AFFECTED 1700 PLANT STATUS AT TIME OF EVENT TESTING Process Rad Monitors uoeE Run , p ,,<u,73 2365 , to ,ogu,Ej 781 CESCRIPTION OF EVENT nuri g the neriod from 1600 hours0.0185 days <br />0.444 hours <br />0.00265 weeks <br />6.088e-4 months <br /> on 12-31-81 to 0130 hours0.0015 days <br />0.0361 hours <br />2.149471e-4 weeks <br />4.9465e-5 months <br /> on 1-2-82, an hourly station r+ cord of the 2/3 chimney release was not maintained as required by T.S. 4.8.A.2.a. The n;w 2/3 chimney monitoring system which was in service during this time failed to retain the hourly sampling data and consequently, a permanent record was not obtained. Upon discovery, th old 2/3 chimney monitoring system was i= mediately placed back into service and the new cy: tem was placed on standby.

1o Craso.72 NRC RED PHONE O NOTirtCATION MADE YES NO EQU I PMENT F A I LU RE 04712 OVES O No ORx aE:uEST No. RESPo~SietE SuPEaviSoa J. Achterberg e,YE 1-2-82 Ps.RT 2 l cPERATING ENGINEER'S COWENTS As soon as the problems with the "Sping" were identified, the old 2/3 chimney moni-toring system was placed back in service. During this period, although a record was not k:pt, the "Sping" system was capable of alarming during any period of High Off-Gas release.

Additionally, Off-Gas flow rate was monitored and recorded and the recombiner and Re-Char cyctems were in service.

O EVENT CF PUBLIC INTEREST 24-HOUR NRC NOTI F t CATI ON REQ'O TECH. SPEC. vicLAriCN TELEpH T. Tongue (courtesy) 1-5-82 1500 REGION lit DATE TIME NON REPORTA8LE OCCURRENCE TELECM/TELECOPY 14 CAY REPO R TA BLE/ T. S. REGION til CATE TIME

@ 30 CAY R EP O R TA BL E / T. S . g pp ANNUAL /SPECL REPORT REQ'O IF ABOVE NOTIFICATION IS PER 10CFR21 A.1.R. e S* DAY WR1TTEN REPORT REQ'O PER 10CFR21 t,E,,, ,82-01/03L-0 TELEPH E- A- Pni-or 1-5-82 M CECO CORPORATE OFFICER DATE TIME PRELIMINARY REPCRT COMPLETED AND REVIE*ED

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RESCLUTION AP9 ROVED AND /

AUTHOR t ZED FCR DISTRIBUTION f jv 44*S170 IFC#w 11 92-11 10*01 5 TAT)C)4 6 pmRINTENOENT dATE #

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