L-90-182, Requests Discretionary Enforcement of Tech Spec 3.4.5.b.2 Re Intake Cooling Water Pump 4B Replacement

Requests Discretionary Enforcement of Tech Spec 3.4.5.b.2 Re Intake Cooling Water Pump 4B Replacement

ML17348A296
Person / Time
Site:	Turkey Point
Issue date:	05/15/1990
From:	Harris K FLORIDA POWER & LIGHT CO.
To:	Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
L-90-182, NUDOCS 9006210035
Download: ML17348A296 (8)

Text

ACCELERATED DISTRIBUTION DEMONS%"i":P~)N SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:.9006210035 DOC.DATE: 90/05/15 NOTARIZED: NO DOCKET FACIL:50-251 Turkey Point Plant, Unit 4', Florida Power and Light C 05000251 AUTH.NAME AUTHOR AFFILIATION HARRIS,K.N.

F3;orida Power-& Light. Co.

RECIP.NAME RECIPIENT AFFILIATION EBNETER,S.D.

Region 2, Ofc of the Director

SUBJECT:

Requests discretionary enforcement of Tech Spec 3.4.5.b.2.

DISTRIBUTION CODE:

IE01D COPIES RECEIVED:LTR' ENCL C7 SIZE:

TITLE: General (50 Dkt)-Insp -Rept/Notice of Violation Response NOTES RECIPIENT ID CODE/NAME PD2-2 PD INTERNAL: AEOD AEOD/TPAD NRR MORISSEAU i D NRR/DLPQ/LPEB10 NRR/DREP/PEPB9D NRR/DST/DIR SE2 NUDOCS-ABSTRACT OGC/HDS2 RGN2 FIL'E 01 EXTERNAL: LPDR NSIC COPIES LTTR ENCL RECIPIENT ID CODE/NAME EDISON,G AEOD/DEIIB DEDRO NRR SHANKMAN,S NRR/DOEA DIR 11 NRR/DRIS/DIR NRR/PMAS/ILRB12 O~

NRC PDR COPIES LTTR E CL 1

'NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO'REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM Pl-37 (EXT. 20079) TO ELIMINATEYOUR NA'MEFROM DISTRIBUTION'ISTS'FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED:

LTTR 22 ENCL

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0 P.O. Box14000, Juno Beach, FL 33408-0420

~~NAY q S 1990 L-90-182 Stewart D. Ebneter Regional Administrator, Region II U.

S., Nuclear Regulatory Commission 101 Marietta St.,

N.'W

, Suite 2900

Atlanta, GA 30323 Mr. Stewart D. Ebneter:

Re:

. Turkey Point Unit 4 Docket No. 50-251 4B Intake Cooling Water Pump Replace'ment

.Discretionar Enforcement Re

est, This letter is a request for discretionary enforcement of Technical Specification 3.4.5.b.2, During the evening of May 13,

1990, a Low ICW pressure alarm was received and a reduction of flow from the Unit 4 Intake Cooling Water (XCW) pump was noted.

Immediately thereafter the "C" pump was started and the "B".pump was stopped.

Pressure and flow returned to normal.

During; the day, on May 14, 1990 various testing was performed on the "B" pump and an inspection was made of the pump intake by a diver.

Subsequent Inservice Tests of the pump still found the "B"'ump in the alert range for delta-P.

The decision was made to replace the "B" pump because of the rapid change in flow characteristics.

The Unit 4 "B" ICW pump was still considered operable but was taken out of service for the replacement starting at 0122 hours0.00141 days <br />0.0339 hours <br />2.017196e-4 weeks <br />4.6421e-5 months <br /> Eastern Daylight Time on May 15, 1990.

The amount of time required for the replacement is estimated to.be 17 hours1.967593e-4 days <br />0.00472 hours <br />2.810847e-5 weeks <br />6.4685e-6 months <br /> with 3 to 4 additional hours of post maintenance testing. It is not anticipated that extra time for the replacement will be required.

Technical Specificat'ion 3..4.5.b.2 states the following:

IIb During power operation the requirements of 3.4.5.a.,

above may be modified to allow any one of the following components to be inoperable provided the remaining systems are in continuous operation.

2.

One intake cooling water pump may be out of service for a period of 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />."

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It should be noted that a 7 day LCO for two pumps with independent power supplies is contained in the draft Revised Technical Specifications as submitted to the NRC on June 5,

1989.

The Revised Technical Specifications for one ICW pump out of service are as follows:

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3 ACTION a.

With only two ICW pumps with independent power supplies

OPERABLE, restore the inoperable pump to OPERABLE status within 7 days or be in HOT STANDBY within the next 6

hours 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 />."

The revision allows operation with two operable ICW'pumps for 7 days provided they are powered from independent power supplies.

The current Technical Specification allows operation with two ICW pumps for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Turkey Point plant has three 1004 capacity ICW pumps, two of these pumps are powered from independent power supplies

("A" ICW pump from the 4A 4160 Volt bus and "C" ICW pump from the 4B 4160 Volt bus) and the remaining pump ("B") is a standby pump normally powered from the 4B bus.

The safety analysis requires one ICW pump

.to remove design basis heat loads.

Operability of two ICW pumps from independent power supplies provides redundancy and assurance that at least one pump is operable assuming a single failure.

The existence of a third pump provides additional assurance of pump availability.

Both operating.

ICW pumps are normally lined up to the two headers supplying flow to three Component Cooling Water heat exchangers.

Each pump has a design flow of 16,000 gallons per minute which can remove a nominal accident heat load of 120 million BTU/hr with a Intake Canal Water temperature of 95 degrees F.

The Unit 4 "A" and "C" ICW pumps meet the acceptance criteria for operability based on the last Inservice Test completed on May 8, 1990..

Due to difficulties which could be encountered during the replacement effort, an extension beyond the presently required 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> is requested.

No further complications are

,expected.

However, since the pump replacement and post maintenance testing process, is complex, an extension to a total Limiting Condition for Operation (LCO) of 7 days is requested.

The:work effort to replace the pump will continue until completion for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> per day and completion of the effort is expected prior to the end of the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> LCO.

However.,

consistent with the draft Revised Technical Specifications, if the "B" ICW pump is not returned to an operable status by 0122 hours0.00141 days <br />0.0339 hours <br />2.017196e-4 weeks <br />4.6421e-5 months <br /> on May 22, 1990, Unit 4 will be placed in hot standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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Based upon the above analysis and the expedited replacement of the "B" ICW pump, the:plant will not be placed in a condition that compromises the health and safety of plant personnel or the general public.

Very truly yours,

/

K. N.

arris Vice President Turkey Point JHG/JEK/jek CC:

.Document Control Desk, USNRC Dr.

G.

E. Edison, Project Manager,

NRR, USNRC Senior Resident Inspector, USNRC, Turkey Point. Plant

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