05000321/LER-1981-114, Forwards LER 81-114/01T-0.Detailed Event Analysis Encl

Forwards LER 81-114/01T-0.Detailed Event Analysis Encl

ML20032D716
Person / Time
Site:	Hatch
Issue date:	11/10/1981
From:	Manry M GEORGIA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20032D717	List: 05000321/LER-1981-114, Forwards LER 81-114/01T-0.Detailed Event Analysis Encl 05000321/LER-1981-114-01, /01T-0:on 811029,decided Condition of Abnormal Cladding Degradation Existed After Offgas Levels Increased on 810923.Cause Still Under Investigation.Affected Bundles of Reload 2 Batch Will Be Replaced
References
PM-81-935, NUDOCS 8111170418
Download: ML20032D716 (2)

LER-1981-114, Forwards LER 81-114/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
3211981114R00 - NRC Website

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USNRC PEGION l

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Edwin 1. Hmh Kudew Plant Novanber 10, 1981 PM-81-935 PLANT B.

I. HATCH Ny ph' // o; Licensee Event Report f

Docket No. 50-321 y

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United States Nuclear Regulatory Commission fN 5

Office of Inspection and Bnforcement Regaon II

?-! NOVJ 6198%I IT (G'.*"ddy&j^rc*r Q Sultc 3100 101 Marietta Strect x

Atlanta, Georgis 30303

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ATTENTION:

Mr. James P. O'Pellly

' 'd-Pursuant to section 6.9.1.8.c of Hatch Unit 1

Technics)

SpecifI ca ti ons,

pl ea se find attached' R9 portable Orcorrence-Report f.50-323/1981-134.

3 knwww J J Kattry-Plant Men e:

m/CLC/pebe Ic: J. H. Miller. Jr.

R. J. Kelly G. F. Head J. T. Ecckham C. L. Coggin R. D. Baker i

Contro1 Roon l

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OFFICIAL COPW 8111170418 811110

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r DR ADOCK 05000321 PDR r

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LER #:

50-321/J981-114 Licensee:

Georgia Power Company Facility Name:

Edwin 1. Ibich Docket 4:

50-321 l

Narrative

Report for LER 50-321/1981-114 On September 23rd whil e opera ting at 100% power, offgas levels as measured by the pretreatment monitor increased sharply.

Though no Technical Specification limits were exceeded it was decided to drop power Icvel to control the offges rates.

The de-rated operation continued until on October 9, the unit was t

shutdown to allow i dent i fi ca ti on and removal of the Icahing i

fuc1 assembli cs.

Sipping of all 560 fuel a ssembli cs identified 11 Reload 2 bundl es which contained f ail ed fuel rods.

Several of these rods were inspected and it was det ermined that there was the i

appearance of accelerated corrosion of the cladding surface.

On 10-29-81, a non-l ea k ing bundle from the same batch as the lenkers also exhibited siellar corrosion.

As the phenomena was not restricted to the leaker ass embli es it was decided that a condition of abnormal cladding degradntion existed.

Based on the inspection results of several of the Rc30ad 2 fuel assemblies, the affected bundl es have been determined to be unacceptable for use at this time and will be rep] aced.

A representative sampling of the other fuel types with si gnifi cant ex has been inspected and are acceptable for continued use.posure The affected fuel will be further st udied in an effort to determine the failure mechanism and the Commi s si on will be informed of any forthcoming conclusions.

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