ML20084U388

Telecopy Ro:On 720327,both Railroad Doors on Unit 2/3 Air Lock Left Open.Cause Unknown.Inner & Outer Doors Have Been Locked & Will Remain Locked Except During Authorized Use

ML20084U388
Person / Time
Site:	Dresden
Issue date:	03/28/1972
From:	Worden W COMMONWEALTH EDISON CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084U386	List: ML20084U384 ML20084U388
References
NUDOCS 8306280659
Download: ML20084U388 (1)

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-1123A I ST M AR 2 8 72 0F A 124 KA093 ,

hj K VEA226 (DE CC0 449 GH $87CC421449 ZCZC 23 NL Plu MORRIS ILL b 27 O  %

BOYCE GRIER DIR AEC COMPLI ANCE REGENT 111 1972 MAR 28 m 10 56 (j

US ATOMIC ENGRY COMM OSEVELT RD GLENELL YN ILL (RTE MAYWOOD

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ILL RTE DlR

! BT SUBJECT D.PR25 DRESDEN NUCLEAR P0nER ST All0N UN IT T HREE. THIS E

3 WILL CONFIRM CONVERSAT10N AT 1600 HOURS T Hi S D ATE w I T h MR F 10RELL A (

RE EXCEEDING SECONDARY CONTAINMENT REQUIREMENTS SPECIFIED IN SECTION 3.7.CM1 FOR A PER IOD Of N0 GREATEri ThAN 2 HOURS. THE COND IT 10N RESULT ED whEN BOTH R AILROAD 000RS ON THEO-2-3 AIR (OCKWERELEFTOPEN SOMETIME AFTER 110 0 HO UR S ON 3-2 7-72. THE CAUSE OF. THIS VIOL AT ION OF EST ABL ISHED PROCEDURES HAS NOT AS ,o YET BEEN DETERMINED. THE VIOLATION W AS DISCOVERED AT.1388 HOURS

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AND SECOND ARY CONT AINLENT INTEGRITY RESTORE D AT 1310 HOURS.

UNIT 111 WAS OPER AT ING DURING THIS PERIOD WHILE UNIT 11 nAS IN THE REFUEL MODE. TO PREVENT A SIMILAR INCIDENT IN THE FUTURE BOTH THE INNER AND OUTER DOORS HAVE BEEN AND nlLL REMAIN LOCKED l EXCEPT DURING AUTHORI ZED USE. T HI S OCCURANCE IS REPORTED UNDER

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SECTION 6.6. A.1 0F T HE T ECHN IC AL SPECI F I CAT I ON n

d W P n0RDEN SUPT ORESDEN NUCLE AR P0nER ST AT 10N RR 1 MORRIS E ILL. ~

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