ML20249B526

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PNO-76-122:on 760710,power Ascension Testing at 50% Power Level Was Interrupted to Investigate Radial Flux of About 4%.Initial Criticality Was Achieved on 760422.Licensee Plans to Issue Press Release on 760716
ML20249B526
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 07/16/1976
From: Dreher F, Roy G, Thompson D
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-76-122, NUDOCS 9806230263
Download: ML20249B526 (1)


Text

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  • PRELIMINARY NOTIFICATION fuly 16, II76 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE-PNO-76-122 ,

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: FIorida Power and Light Company St. Lucie 1 (DN 50-335 Subj ect: SHUTDOWN TO INVESTIGATE FLUX TILT Power ascension testing at the 50% power level on 7/10/76 was interrupted to ivestigate a radial flux of about 4%. Two situations have been postulated, one involves selective crud deposition or removal and hence boron hideout in the core and the other involves nonuniform burnup of burnable poisons. Initial criticality was achieved on 4/22/76 and the core has 25 effective full power days operation. Highest power level attained was 80%.

Duration of the shutdown is expected to exceed 10 days to reperform zero power testing.

FPL plans to issue a press release the afternoon of 7/16/76.

j OIE received notification of this occurrence by telephone from the Plant Superintendent on 7/10/76, with an update on July 15 & 16, 1976.

Contact:

FADreher, IE x27261 GWRoy, IE x27261 DThompson, IE x27541 Distribution:

Chairman Rowden Commissioner Mason S. J. Chilk, SECY

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Commissioner Gilinsky C. C. Kammerer, CA G. F. Murphy, JCAE 2,

{ Commissioner Kennedy L. V. Gossick, EDO E. Volgenau, OIE J. A. Harris, PA B. C. Rusche, NRR H. K. Shapar, ELD T. J. McTiernan, AIA i K. R. Chapman, NMSS R. G. Ryan, OSP i

Transmitted: PBldg  ; E St Y  ; NMBBg  ; Luge 4I; PRELIMINARY NOTIFICATION i

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