ML20003D717

Proposed Temporary Revision to Tech Spec 3.7.4 Re Limiting Conditions for Operation of Svc Water Sys.Bases for Changes Encl

ML20003D717
Person / Time
Site:	Farley
Issue date:	03/24/1981
From:	ALABAMA POWER CO.
To:
Shared Package
ML20003D716	List: ML20003D715 ML20003D717
References
NUDOCS 8103310294
Download: ML20003D717 (4)

Text

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PLAtlT SYSTEMS

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3/4.7 5 SERVICE WATER SYSTEM

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LIMITIf;G C0!iDITIO1 FOR OPERATION '

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3.7.4 At least two independent service water loops shall. be OPERABLE.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With only one service water loop OPERABLE, restore at least two lo' ops to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STAT 10BY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

• SURVEILLANCE REQUIREMENTS 4.7.4 At least two service water loops shall be demonstrated OPERABLE:'

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At least once per 31 days by verifying that each accessible valve (manual, power operated or automatic), in the flow path, servicing safety related equipment that is not locked, sealed, or otherwise secured in position, is in its correct position.

b.

At least 'once per 18 months during shutdown, by: '

1.

Verifying that each automatic valve servicing safety

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related equipment actuates to its correct position on a safety injection test signal.

2.

Verifying that the buried piping is still leak tight by visual inspection of the ground area.

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• One time only exception for modification of the service water recirculation lines-the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action statement provision may be exceeded for a period of 10 days for the recirculation portion of the service water system. All other portions of the service water system are not covered by this one time exemption.

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FARLEY - UNIT 1 3/4 /-16

PLANT SYSTEMS

' 3/4.7.4 SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION

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3.7.4 At least two independent service water ' loops shall be OPERABLE with at least two service water pumps per loop.

1 APPLICABILITY: MODES 1, 2, 3 and 4.

I ACTION:

With only one service water loop OPERABLE, restore at least two loops to OPERASLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTD0'4N within the, following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

• c SURVEILLANCE REOUIREMENTS 4.7.4 At least two service water loops shall be deconstrated OPERABLE:

a.

At least once per 31 days by verifying that each accessible valve (manual, power operated or automatic) in the flow path, servicing safety related equipment that is not locked, sealed, or otherwise-1-

secured in position,'is in its correct position.

b.

At least' opce per 18 months during shutdown, by:

1.

Verifying that each automatic valve servicing safety related -

equipment actuates to its correct position on a safety injection test signal.

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Verifying that the buried piping is leak tight by a visual 2.

inspection of the grou7d area.

• One time only exception for modification of the service water recirculation lines - the 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action statement provision may be exceeded for a period of 10 days for the recirculation portion of the service water system. All other portions of the service water systen are not covered by this one time exemption.

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FARLEY-UNIT 2 3/4 7-12

4 FARLEY NUCLEAR PLANT UNITS 1 AND 2 BASES FOR TECHNICAL SPECIFICATION SECTION 3.7.4 ONE TIME ONLY CHANGE 1.

Only one train of the service water recirculation line to the pond

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will be made inoperable at any one time.

Recirculation to the pond is not the nonnal mode of operation.

2.

Both trains of service water to the plant ant, ithin the plant will perform their intended functions with current specifications remaining in effect.

3.

Prior to initiating the modification on the service water recirculation line, both trains of river water for Units 1 and 2 will be verified operable.

4.

In addition, Alabama Power Company will not initiate the modification if there in any forecast of unusual river water flows which could

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possibly impair river water operability.

-5.

It is extremely unlikely that a dam failure at Farley Nuclear Plant will occur because of the following:

The dam is conservatively designed and constructed to withstand a.

the design basis seismic event selected for the site. The acceleration levels assumed for the design basis earthquake are conservative since Farley Nuclear Plant is located in one of the lowest seismic regions of the United States as stated in FSAR Section 2.5.

b.

The dam is conservatively designed and constructed to withstand

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the probable maximum flood postulated to occur at the site coupled with the wave heights that could be reached for extremely high wind levels.

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i 6.- The accident scenario also required loss of o.ne train of river water. This in and of itself. is unlikely within the short time period of the modification.

7.

Operators will receive additional emphasis on the specific actions required to balance service water flow under the postulated accident conditions.

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Conclusion:==

This modification will not adversely affect the safe operation of the

- Farley Nuclear Plant Units 1 and 2 during implementation.

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