ML20248H781

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PNO-78-100:on 780427 During Handling of Spent Fuel,Binding Detected Between Fuel Assembly & Storage Rack.Fuel Assembly Returned to Initial Position.Licensee Evaluating Problem. State of Connecticut Informed & Press Release Planned
ML20248H781
Person / Time
Site: Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png
Issue date: 05/01/1978
From: Blackwood E, Sniezek J
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-78-100, NUDOCS 9806080247
Download: ML20248H781 (1)


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' '$ PRELIMINARY NOTIFICATION

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May 1, 1978 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-78-100 This 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 on this date.

Facility: Connecticut Yankee Atomic Power Company

Haddam Neck Plant, Haddam, Connecticut (DN 50-213)

Subject:

DEFORMATION OF FUEL STORAGE RACKS On April 27 during handling of spent fuel, binding was detected between a fuel assembly and its storage r6ck. The fuel assembly was half way out of its storage rack when further withdrawal would have required excessive lifting force. The fuel assembly, which had been placed in the spent fuel pool in October 1977, was returned to its initial rest position. .

>2Eli The licensee is evaluating the problem. The initial indication is swelling of the sealed boron carbide plates in the full storage rack believed by

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the licensee to be due to gas generation within the plates.

Media interest is expected. The State of Connecticut has been informed.

A press release is planned by the licensee.

NRC, Region I, (Philadelphia) received notification of this occurrence by telephone from the Assistant Plant Superintendent at 4:00 p.m.

April 28,1978.

Contact:

EBBlackwood, IE x27451 JHSniezek, IE x27451 Distribution: Transmitted H St /2,', T O Chairman Hendrie Commissioner Bradford Commissioner Kennedy. S. J. Chilk, SECY C. C. Kammerer, CA Commissioner Gilinsky (For Distribution)

Transmitted: MNBB/ M f / P B1dg iL'Il E. Vol enau, IE L. V. Gossick, EDO E. G. Case, NRR Region j 2. ,' flo S. H. Hatauer EDO

, J. J. Fouchard, PA SS Bldg ll', N (MAIL) l N. M. Haller, MPA C. V. Smith, NMSS T. J. McTiernan, DIA R. G. Ryan, OSP R. Minogue, SD H. K. Shapar . ELD PRELIMINARY NOTIFICATION 1

l 9906080247 790501 PDR I&E

.PNO-78-100 PDR L