ML20076J529

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Advises That RO 50-366/1983-061 Re Intermediate Trip Set in Nonconservative Direction,Reported on 830808,not Considered RO & Withdrawn.Narrative Decription Supporting Withdrawal Encl
ML20076J529
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 08/31/1983
From: Nix H
GEORGIA POWER CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
GM-83-842, NUDOCS 8309070224
Download: ML20076J529 (2)


Text

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e Georgia Power Company

,e-Post Office Box 439

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9 M' O N * *N' Bexley, Georgia 31513

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  • GeorgiaFbwer Edwin I. Hatch Nuchb August 31, 1983 GM-83-842 PLANT E.

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HATCH Licensee Event Report Docket No. 50-366 United States Nuclear Regulatory commission Office of Inspection and Enforcement Region II Suite 3100 101 Marietta Street Atlanta, Georgia 30303 ATTENT ION :

Mr. James P. O'Reilly Reportable Occurrence number 50-366/1983-061 was reported to you on August 8,1983, via an RO telegram; however, further investigation has shown that the occurrence should not have been considered a reportable occurrence (refer to attached narrative).

Thus, we are withdrawing that report.

Also, please note that this report number will be used for a subsequent reportable occurence.

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Nix General Manager N

HCN/SBT/djs xc.

R.

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Kelly G.

F.

Head J.

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Beckham, Jr.

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Rice K. M. Gillespie S.

B. Tipps R.

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Baker Control Room opHCIAI. COPY Document Control b

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-Item 2-of. Tech.

Specs.

table 3.3.5-1 requires the following to be operable in order for the Rod Block Monitors (RBM) to be operable:

upscale, inoperative, and downscale.

The RBM's have the following functions: downscale, inoperative, low trip, intermediate trip, and high trip.

The intermediate trip acts Las the. upscale trip below 100 % of rated recirculation flow, and then the high trip acts as the upscale trip.

The RO telegram reported that the intermediate trip was set in a non-conservative direction.

Further investigation has shown that.the intermediate trip was set correctly; the low trip was the only trip setpoint which was; outside of the procedural requirements.

There is no Tech. Specs. requirement for.the low trip.

This event was determined to be non-repcrtable on August 15, 1983, in

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Plant Review Board meeting number 83-159.

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