ML20084F256

RO 251-75-3 Re Leak of Spent Fuel Pit Concrete Wall. V-shaped Stainless Steel Drain Trough Installed on Concrete Wall of Fuel Transfer Tube.Mod of Spent Fuel Storage Sys Under Consideration

ML20084F256
Person / Time
Site:	Turkey Point
Issue date:	12/05/1975
From:	Schmidt A FLORIDA POWER & LIGHT CO.
To:	Moseley N NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20084F146	List: ML20084F148 ML20084F155 ML20084F166 ML20084F189 ML20084F203 ML20084F207 ML20084F215 ML20084F222 ML20084F256
References
RO-251-75-3, NUDOCS 8304210062
Download: ML20084F256 (2)

Text

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,gz a===L=w*d FLORIDA P0e<ER & tlGHT COP.tPANY .

December 5, 1975 ,

PRN-LI-75-9 250 - e 5 i Mr.' Norman C. Moseley, Director, Region II Office of Inspection and Enforcement . - -

U. S. Nuclear Regulatory Commission F ,O '

230 Peachtree Street, N. W., Suite 818 s D

Atlanta, Georgia 20303 ' ff'  :

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Dear Mr. Moseley:

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UNUSUAL EVENT 251-75-3 1975A' :s

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TURKEY POINT UNIT 4 SPENT FUEL PIT LEAK s E ne A. DESCRIPTION OF EVENT -

' 'J On November 6, 1975, the Region II Office of Inspection l

and Enforc'ement was notified that the Unit 4 Spent Fuel Pit (SFP) concrete wall had been found to be leaking.

The leak is above the concrete shielding around the fuel transfer tube and is similar to the Unit 3 SFP leakage reported in Unusual Event 250-74-6 dated November'26, 1974.

The leak rate is approximately 2 gallons per hour.

B. APPARENT CAUSE AND ANALYSIS OF EVENT Water is leaking from the SFP through the SFP liner and then through the concrete wall.

A special drain trough has been installed to. divert leak- '

age to the Waste Holdup Tank. Prior to installation of

• the trough, the leakage was being absorbed by the ground around the SFP. The activity of the water was measured r and it is estimated that 240 mci were released to an area which is inside the plant's radiation controlled boundary. {

This amount of activity is 4.8% of the Technical Specifica-tion quarterly release limit.

C. CORRECTIVE ACTION On November 22, 1975, a "V"-shaped stainless. steel-drain trough was installed on the concrete wall of the Unit 4 fuel transfer tube. Leakage from the SFP is now, collected.

by the trough and diverted to the Waste' Holdup Cank.

B304210062 760528

# 13968 PDR ADDCK 05000250 H PDR (X)PY SENT REGIONm ' *p

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y Mr. Norman C. Moseley, Director, Region II Page Two .

, December 5, 1975

,The permanent corrective action would be to repair the liner as necessary to stop the leakage. Such action would involve draining the SFP, but this cannot be done at present because of spent fuel storage requirements.

However, potential modifications of the spent fuel storage i system are being considered, and it may be possible to eliminate SFP leakage during such modifications. If spent fuel system modifications are performed, considera-tion will then be given to include SFP liner repair.

Very truly yours, Kl&

. D. Schmidt Vice President Power Resources MAS /ms cc: Jack R. Newman, Esquire .

Director, Office of Inspection and Enforcement (30)

Director, Office of Management Information and Program Control (3)

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