05000321/LER-1980-103-03, /03L-0:on 800822,during Operation at 99% Power, Plant Svc Water Flow Was Restricted.Caused by Tripped Drive Mechanism & Coupling Failure of Strainers 1P41-D103A & 1P41- D103B.Breaker Reset & Coupling Repaired

/03L-0:on 800822,during Operation at 99% Power, Plant Svc Water Flow Was Restricted.Caused by Tripped Drive Mechanism & Coupling Failure of Strainers 1P41-D103A & 1P41- D103B.Breaker Reset & Coupling Repaired

ML19332A423
Person / Time
Site:	Hatch
Issue date:	09/09/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19332A420	List: 05000321/LER-1980-103, Forwards LER 80-103/03L-0 05000321/LER-1980-103-03, /03L-0:on 800822,during Operation at 99% Power, Plant Svc Water Flow Was Restricted.Caused by Tripped Drive Mechanism & Coupling Failure of Strainers 1P41-D103A & 1P41- D103B.Breaker Reset & Coupling Repaired
References
LER-80-103-03L, LER-80-103-3L, NUDOCS 8009150385
Download: ML19332A423 (2)

LER-1980-103, /03L-0:on 800822,during Operation at 99% Power, Plant Svc Water Flow Was Restricted.Caused by Tripped Drive Mechanism & Coupling Failure of Strainers 1P41-D103A & 1P41- D103B.Breaker Reset & Coupling Repaired

Event date:
Report date:
3211980103R03 - NRC Website

text

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U. S. NUCLE AR RE(eEEd.hkBA/Whadin*Ji1 K FORM 366

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LICENSEE EVENT REPORT g

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ONT 68 69 LVLNT DATE 14 7b REPORT DAT E 80 60 61 DOCKET NUMBER 8

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I

While operating at a steady state of power, Hiah Prese'Jre Indications were El 1

received on the inlet of both plant service water strainers which indicated gi 0 i4 i i a flow restriction.

At this time both divisione, of plant service water 1

were dministrativeJy declared inoperable.

A limited condition for oper-l yl j

atir.i was established per Tech Spec 3.5.J.3 and reactor shutdown was 0 o l l

This is not a repetitive event. There were no effects upon public O 7 l started.

I health and safety due to this event.

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40 41 42 43 44 41 CAUSE oESCRIPTioN AND CORRECTIVE actions h I

Upon investigation, both pl, ant service water strainers were found partially lilO11 1

L estricted." This was due to a coupling failure on the backwash drive mech-i i The 1

anism on 'B' and a tripped breaker on the drive mechanism on

'A'.

ii,,i 1 [T{T] l coupling was re,) aired and the breaker was re-set.

Both strainers were back-l I

washed and both divisions of plant service water returned to service.

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. tf 9-10 R. T, Nix, Supt. of Maint.

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.. g LER-#: 50-321/1980-103.

Licensee: Georgia Power Company.

Facility. Name : Edwin I. Hatch Docket #: 50-321

Narrative

Report for LER 50-321/1980-103.

On August 22, 1980, with the reactorat 99% power, high pressure indications on the inlet of both plant service water strainers were received in the con-trol room. High temperature alarms on systems served by plant service water were-also received, which indicated that the~ flow of plant service water was being restricted. ' At this time both divisions of plant service water were adminis-tratively declared inoperable.

A limited condition for operations per Tech Spec 3.5.J.3 was established.and reactor shutdown was started.

~ Upon investigation both plant service water strainers were found to be partially restricted. The IP41-D103B strainer was inoperable due to a coupling failure on the drive motor and the power supply breaker for the IP41-D103A strainer drive mechanism was found tripped.

The coupling on the IP41-D103B strainer was repaired and the breaker was reset on

'A'.

Both strainers were backwashed and both divisions of. plant service water was then returned to service.

This incident had no gener[c effect on-Unit II service water strainers.

The strainers for-Unit 'II are of the same design but. were supplied by a different manufacturer- (R. P. Adams, Inc. ).

Both of the Unit II service water' strainers were inspected with no abnormalities noticed.

This. is not a repetitive occurrence.

There was no effects upon public heal.th

- and safety due to this event.

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