ML20248L036

PNO-78-042:on 780305,during shutdown,128 Curies of Noble Gas Were Inadvertently Released from Waste Gas Sys to Auxiliary Bldg & Subsequently Discharged in Controlled Manner to Environ Via Auxiliary Bldg Ventilation Exhaust

ML20248L036
Person / Time
Site:	Crystal River
Issue date:	03/07/1978
From:	Cohen L, Liza Cunningham NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
To:
References
PNO-78-042, PNO-78-42, NUDOCS 9806100384
Download: ML20248L036 (1)

Text

f)fy ()Qfpr& G fpf f Q, PRELIMINARY NOTIFICATION h

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March 7, 1978 PRELIMINARY NOTIFICATION OF EVE F OR UNUSUAL OCCURRENCE -- PNO-78 42

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V 1his preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff as of this date.

FACILITY: Florida Power Corporation Crystal River, Unit No. 3 Docket No. 50-302 Citrus County, Florida

SUBJECT:

UNPLANNED RELEASE OF RADI0 ACTIVE MATERIAL On March 5, during shutdown, 128 curies of noble gas, mostly xenon-133, were inadvertently released from the waste gas system to the auxiliary building and subsequently discharged in a controlled manner to the environment via the auxiliary building ventilation exhaust. This release was 5% of the licensee's most restrictive instantaneous release limit.

The release was caused by improper positioning of valves in the waste gas system. No injuries or personnel contamination occurred. - -

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Region II (Atlanta) received notification of this occurrence by telephone from the licensee at 10:00 a.m. on March 6,1978. The State of Florida

(" and the Environmental Protection Agency were informed on March 6. A News b

..- Release was made by the licensee on March 7,1978. An IE inspector is onsite reviewing this matter. /

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Contact:

LKCohen, IE x28188 LJCunningham, IE x28188

'_Di stribution: Transmitted H St/ I ) b '

Chairman Hendrie Commissioner Bradford Commissioner Kennedy S. J. Chilk, SECY C. C. Kammerer, CA Commissioner Gilinsky (For Distribution)

Transmitted: MNBBL/l3T PBldgh.39 IE L. V. Gossick, EDO E. G. Case, NRR E. Vol Region enau, Y!V b S. H. Hanauer, EDO J. J. Fouchard, PA SSBldg'[i'/[ (MAIL)

R. Hartfield, MIPC C. V. Smith, NMSS T. J. McTiernan, 01A

! R. G. Ryan, OSP R. Minogue, SD l H. K. Shapar. ELD l

PRELIMINARY NOTIFICATION

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i 9906100304 790307 PDR ISE PNO-78-042 PDR I - - - . - - - _ _ _ _ _ _ _ _ __