ML20084L655

Telecopy Ro:On 740806,torus Water Level Exceeded Tech Spec Limits.Caused by Failure of Level Instrumentation.Proper Level Restored

ML20084L655
Person / Time
Site:	Dresden
Issue date:	08/07/1974
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084L651	List: ML20084L644 ML20084L655
References
NUDOCS 8305230595
Download: ML20084L655 (2)

Text

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TELEGRAMS (OTHER THAU MOSET ORDERSJ:': i f

Ts PHYSICAL DELIVE~sY rcc eted" 3U~['C '

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$ ~Ik@ES 10055 IDVE MORRIS IL> 15a 03-07; 850A CDI ".,eMD!, o r I,l ,i -. 1 i

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I3fOPEdATIONREGION4USATOMIC~ENEh6Y'C0MM'ISSIONWUX 799 800SEVELI RD l}bg GLEN ELLYN IL 60157

$g SUBJECT DPR-19 DRESDEN NUCLEAR POWin SIATION UNIT 2 8 IHIS WILL CONFIRM A CONVEhSATION WIIH F MAURA 0F YOUR OFFICE AT

,1615 HOUh8 THIS DATE CONCERNING TORUS WATER LEVEL IN EXCESS OF

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mhIECHINCALSPECIFICATIONoLIMITSDUETOFAILUAEOFLEVELINSTRUMEN-TATION. AT 1557 6 AUGUST 1974 A T0RUS LEVEL ALARM RECEIVED A A 'IIME ,

, OF NORMAL INDICATED TORUS LEVEL GENERATED-A REQUEST TO CALLIBRATE THE i

nr.mdQfeUS LEVEL TRANSMITTER. THE CALLIBRATION WAS IN ERROR AND AS A f*

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e IEStA.T THE SPERATOR THOUGHT WATER LEVEL VAS T00 HIGH AND PLMPED DeWN -

TORUS LEVEL AT 2400 HOURS 10 A LEVEL BELOW THE MINIMUM REQUIRED.

THE POSSIBILITY OF ERROER BECAME APPARENT ABOUT 1515 6 AUGUST AND 1

,' WAS CONFIRMED ni 1600 TO BE A APPROXIMATELY -7. INCHES OR 2 INCHES i i BELOW MINIMUM LEVEL OF -5 INCHES On APPRonIMATELY 2 PERCENT LESS THAN REQUIRED VOLUME. IMMEDIATELY TOOK MEASURES TO RESTORE LEVEL:

FROM'SIORA0E TANK. LEVEL RESTORED AI 2000. I f'

bb STEPHEN 60N SUPERINTENDENT DRESDEN NUCLEAR POWER STATION i >

i COMMONVEALTH EDISON CO RT 1 MORRib IL 60450 Q h  !

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