ML19249C891

Ro:On 790908,Unit 1 Was in Run Position & Unit 2 Was in Hot shutdown,E11-C001A,B & D Pumps Failed to Meet Operability Procedure HNP-1-3167 Due to Formula Errors in Pump Discharge Pressure Calculations.Units Shut Down & Formulas Reviewed

ML19249C891
Person / Time
Site:	Hatch
Issue date:	09/10/1979
From:	Manry M GEORGIA POWER CO.
To:
References
NUDOCS 7909190257
Download: ML19249C891 (2)

Text

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USNRC REGt.h.

L 05 BAXLET, GA.

11513 O g g

• G F." ~~ ' F.Eassee a n ease PMS MR. JAMES P. O'REILLY 2,a KDet UNITRD STATES NUCLEAR REGULATORT COwHISRION LN-

'& t LONG \\

DIRECTOR OF INSPECTION AND REOION II ENFORCFMEN% $[P ll b

WE

I EY M SUITE 3100 101 MARIETTA STREET W

ATLANTA, GEORGIA 30301

SUBJECT:

HATCH UNIT I & UNIT P,

DOCERT NOS. M0 1P1 & 90-164, r"-

l k NOTIFICATION OF REPORTABLE OCCURRENCE NOS.

a DATE:

1. 10-70 NOTIFIRD:

Ross F.

Rocean

',",i DATE:

0-B-10 TIME:

2010 EDT 1

DESCRIPTION OF REPORTABLE OCCURRENCE w

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-' Initial Condslion

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trior to the occurrence the Unit i reactor was in the run

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position.at F10h metawatts l'heca'al; the Unit 2 reactor was in the hot l

shutdown condition.

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Nature or Deeurrence UI E11-C001A, 11,

ID punps t=11ed to nect the requ$recents or their opernhility procedure HNP-1-3167; it was latre I

de termi nnd tha$.

"C" pump had also railed after R 11 - R 0018 0 had been recalibrated.

Still laten, with the units shutdown it

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was discovered that HNP-1 1167 and HNP-2-3165 had erao*s i theiF punp pressure formulas.

't Ismediale Corrective Actiott 4

Operatkons init.i a ted steps f urott, fin in tenance Requests to calibrate pressu're guages) lo prove the RHR Service water systen operable, then brour,ht Uni t i re a c t.or to col d nhtat town per Tech Specs section 3.5.0.

The architect-engineers j

consulted about the pump cocenbility procedures.

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HHP k '4167 - and HNP-2-11 A1 h a d e r r o r s [i n th calculate pump discharr.e values shown on_R11-P1-R00bA-D.. pressures, which should equal the

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s of Redundant or Backup, Systems L

On Unit d ali four er the RHR Service water punon were

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The Unil N procedure wad also Peviewed and found to hue the same errors as Unit i,1 Unit 2 was already shutdown to fix steam leaks.).

s Jus ti fi enti on for Conlinued Oceration Both unils e were, shubdown; their related proceduren have been revised.

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