05000366/LER-1979-125-03, /03L-0:on 791114,during Routine Review of Previous Radwaste Discharges,Discovered That on 791107,while at O Mwt Power,Min Required Recirculation Time Not Met on Chemical Waste Sample Tank A.Caused by Clogged Inlet Strainer

/03L-0:on 791114,during Routine Review of Previous Radwaste Discharges,Discovered That on 791107,while at O Mwt Power,Min Required Recirculation Time Not Met on Chemical Waste Sample Tank A.Caused by Clogged Inlet Strainer

ML19260C158
Person / Time
Site:	Hatch
Issue date:	12/11/1979
From:	Rogers W GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19260C152	List: 05000366/LER-1979-125, Forwards LER 79-125/03L-0 05000366/LER-1979-125-03, /03L-0:on 791114,during Routine Review of Previous Radwaste Discharges,Discovered That on 791107,while at O Mwt Power,Min Required Recirculation Time Not Met on Chemical Waste Sample Tank A.Caused by Clogged Inlet Strainer
References
LER-79-125-03L, LER-79-125-3L, NUDOCS 7912180642
Download: ML19260C158 (3)

LER-1979-125, /03L-0:on 791114,during Routine Review of Previous Radwaste Discharges,Discovered That on 791107,while at O Mwt Power,Min Required Recirculation Time Not Met on Chemical Waste Sample Tank A.Caused by Clogged Inlet Strainer

Event date:
Report date:
3661979125R03 - NRC Website

text

NRC FORM 366 U. S. NUCLL AH HLGUL AiUH Y COMMibblON (7 771 L4CENSEE EVENT REPORT CONTROL BLOCK: l l

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l (PLE ASE PRINT OR TYPE At L REOUIRED INFOHMA110N)

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60 61 DOCKE T NUMBEH

'd WJ EVENT DATE 14 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBA0LE CONSEQUENCES h 10121 1 On 11-14-79, during a routine review of previous liquid rad'.. aste discharges, it was l

l O l 31 discovered that, on 11-7-79, while at'0 Kit power, the minimum recirculation time 1

l prior to sampling and analysis, as required by E.T.S. sectic a 2.1.2.C, was not met on 1 0 4 la ls] l Unit II Chemical Waste Sample Tank A.

5548 gallons of this tank was subsequently 10 is 1 l discharged to the Altamaha River.

A similar event occurred on this tank during power l l0 l 7 l l operation at 2399 Mit on 11-21-79 and 70 gallons was discharged to the river.

A re-l l view of the liquid radwaste radiation monitor recordin9s for these discharges (cont) 1 0

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40 di 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Ii iO I I In both events an inspection of the pump, used for both rec' rculation and discharge, I

i i i revealed that the inlet strainer had become clogged with sr.11 bits of paper which l reduced the flow capacity of the pump. The strainer was c1 cined and the pump returned; i 2 l to service.

The pump is now in full compliance with the rc uirements and no further l i

3 l reporting is required.

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% POWE R OTHER STATUS IS O F D 3COVERY DESCRIPTION 32 (G_J@ l 0 l 0 l 0 l@l NA l

B l@l Routine Inspc : tion of dischar e permits l i s ACTIVITY CONTENT RELE ASED OF RELE ASE AMOUNT OF ACTIVITY LC ATION OF RE LE ASE lZ l @ l Z l@l NA l

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8 9 10 tt 44 45 8t PERSONNEL EXPOSURES NUMB E R TYPE

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8 9 10 69 69 80 5 NAME OF PREPARER PF m-Radiochemist

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I Georgka Power Company Plant E.

I.

Hatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/79-125 Event Description and Probabic Consequences continued indicate that, although the tank was not recirculated in accordance with the E.T.S.,

adequate mixing did occur prior to sampling; i.e.,

no significant increases or, decrea se's in radiation levels were observed during the discharges.

There was no significant occurrence that took place as a result of tF*s event.

There were no probable consequences as a result of thess events.

There was no cbnormal release of radioactive material as a result of these events and no effects upon the public health and safety.

These events are non-repetitive.

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1614 334

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NARRATIVE

REPORT l:

Georgia Power Company Plant E.

I.

Hatch Baxley, Georgia "1513 Reportable Occurrence Report No. 50-366/79-125 On 11-14-79 during a routine review of previous liquid radwaste discharges, it was discoverd that, on 11-7-79, while at 0 MWt power, the minimum recirculation time prior to sampling and analysis, as required by E.T.S.

section 2.1.2.C, was not met on Unit II Chemical Waste Sample Tank A.

5548 gallons of this tank was subsequently g

discharged to the Altamaha River.

A similar event occurred on this I

tank during power operation at 2399 MWt on 11-21-79 and 70 gallons was discharged to the river.

A reviaw of the liquid radwaste l

radiation monitor recordings for these discharges indicate

that, although the tank was not recirculated in accordance with the E.T.S.,

adequate mixing did occur prior to sampling; i.e, no significant increases or decreases in radiation levels were observed during the discharges.

The tanks were recirculated for 75 and 78 minutes each.

These values are acceptable based on the normal pumping capacity of 50 gpm.

With the flow restricted, however, to 29 gpm and 20 gpm, as in these two events, the minimum recirculation times would have had to be 112 and 163 minutes, which are 37 and 85 minutes short of the Tech Spec limit.

In both events an inspection of the pump,

used for both recirculation and discharge, revealed that the inlet strainer had become clogged with small bits of paper which reduced the flow capacity of the pump.

The strainer was cleaned and the pump returned to service.

The pump is now in full compliance with the requirements and no f'arther reporting is required.

1614 335