ML20248L236

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PNO-78-058,on 780323,disk on Isolated & Unused Original off-gas Delay Line Ruptured.During Shutdown,Isolation Valves on Unused Line Will Be Removed & Line Will Be Blanked.No Airborne Radioactivity Release Resulted from Event
ML20248L236
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 03/23/1978
From: Nolan F, Sniezek J, Whitt K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:
References
PNO-78-058, PNO-78-58, NUDOCS 9806110026
Download: ML20248L236 (1)


Text

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_pq _. PRELIMINARY NOTIFICATION g,  !

March 23, 1978 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PH0-78-5 Thi-_ preliminary notification constitutes EARLY notice of an event of M ,IBLE 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 on this date.

Facility: Vermont Yankee Nuclear Power Corporation VermontYankee(DN50-271)

Vernon, Vermont

Subject:

PLANT SHUTDOWN AND FAILURE OF 0FF-GAS RUPTURE DISK Licensee reported that a rupture disk, on an isolated and unused original off-gas delay line, popped while plant was being shutdown for repair of a Recirculation Pump Bearing 011 Cooler. Shutdown for cooler repair will last approximately four days. During shutdown, the isolation i i

valves on this unused line will be removed and the line will be blanked. l No airborne radioactivity release, contamination, personnel injury, or equipment damage resulted from the event. '

m.

[f Media interest is expected because of plant location and licensee

} notification of State and Media representatives. The State of Vermont

(, c' has been informed. A press release is planned by the licensee.

/

NRC, Region I, (Philadelphia) received notification of this occurrence by z')

telephone from the Plant Superintendent at 9:45 a.m., on March 23, 1978. /~

Contact:

KWWhitt, IE x28019 FNolan, IE x28019 JHSniezek, IE x28019 2

Distribution: Transmitted H St 1', / 3 Chairinan Hendrie Commissioner Bradford Commissioner Kennedy S. J. Chilk, SECY C. C. Kammerer, CA Commissioner Gilinsky (For Distribution)

Transmitted: MNBB M / f P Bldg 2. / lo E. Volgenau, IE L. V. Gossick, EDO E. G. Case, NRR S. H. Hanauer, ED0 Region 7 2.i/9 J. J. Fouchard, PA SSBldg1;/7 (MAIL R. Hartfield, MIPC C. V. Smith, NMSS T ~J-)McTiernan, OIA R. G. Ryan, OSP H. K. Shapar, ELD R. Minogue, SD PRELIMINARY NOTIFICATION

'. o 9906110026 PDR 700323" I4 E PNO-78-059 PDR

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