ML20125C607

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RO-50-321/79-98:on 791210,while Operating at 80% Power, Found That Reactor Core Isolation Cooling Was Inoperable on 791208,w/o Proving HPCI Operable Per Tech Specs.Caused by Personnel Error
ML20125C607
Person / Time
Site: Hatch Southern Nuclear icon.png
Issue date: 12/11/1979
From: Manry M
GEORGIA POWER CO.
To:
References
NUDOCS 8001100542
Download: ML20125C607 (2)


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P. D. CHENDIW

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PMS MR. JAMES P. O'REILLY f '2"d UNITED STATES NUCLEAR REGULATORY COMMJSSION 1

DIRECTOR OF INSPECTION AND ENFORCEMENTI f Il P 2

  • 3 'l REGION II s-SUITE 3100 M

101 MARIETTA STREET

/h ATLANTA, GEORGIA 30303

SUBJECT:

HATCH UNIT i. DOCKET NO. 50-321, NOTIFICATION OF REPORTABEL OCCURRENCE NO 50-321/1979-98 t

NOTIFIED: R. Rogers DATE:

12-10-79 1

TIME:

1415 DESCRIPTION OF REPORTABLE OCCURRENCE: Non-compliance of Technical Specification 3.5.E Initial Condition j

On 12-10-79 while operating at 80% power, it was discovered that RCIC was in-operable on 12-8-79 without proving HPCI operable per Tech Specs 3.5.E.2 and without meeting shutdown requirements per Tech Specs 3.5.E.3.

RCIC tripped on High Turbine Exhaust Pressure and was properly logged by shif t personnel but shif t personnel failed to intnediately prove H,PCI operable.

HPCI has been proven operable on 12-09-79 Nature of Occurrence:

Failure to consider RCIC systeminoperable af ter a trip on high turbine exhaust pressure on 12-8-79.

Therefore, the HPCI system we,s not proven operable as require by Tech. Spec. 4.5.E.2 Also, Tech. Spec. section 3.5.E.3 was not compiled with.

Irvnediate Corrective Action:

None as far as system operability is concerned.

.Cause:

Personnel oversight 90008250 S_upplemental Corrective,_ Action:

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_le-emphasized the importance of complying with limited condition of operation as stated in Tech. Spec.

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_ Status of Redundant or Backup Systems:

At time of discovery, the backup system was operable as demonstrated on 12-9-79.

Impact to _0th_er Units:

None.

Operation of RCIC on Unit I has no effect on Unit two system.

Justification for ContinJed Operation:

The RCIC and HPCI system are both operable as demonstrated 12-9-79.

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t hm.f/4L M. Manry Plant Manager 9000825i o

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