ML18227A444

Letter Reporting Unusual Event 251-75-3 of Spent Fuel Pit Leak, in Unit 4 on 11/6/1975

ML18227A444
Person / Time
Site:	Turkey Point
Issue date:	12/05/1975
From:	Schmidt A Florida Power & Light Co
To:	Moseley N NRC/RGN-II
References
PRN-LI-75-9
Download: ML18227A444 (6)

Text

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Letter t.eporting Unusual.Event Report 8 75'-3, on 11-,6-.75, Concerning Bpent Fuel Pit Leak...

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FLORIDA POWER & LIGHT CO APA IY December 5,

1975 PRN-LI-75-9 Mr. Norman C. Moseley, Director, Region Office of Inspection and Enforcement U.

S. Nuclear Regulatory Commission 230 Peachtree

Street, N; N., Suite 818 Atlanta, Georgia 30303 E

Dear Mr. Moseley:

'NUSUAL EVENT 251-75-3 TURKEY POINT UNIT 4 SPENT FUEL PIT LEAK A.

DESCRIPTION OF EVENT On November 6 g 1 9 75 i the Region II Office of Inspection and Enforcement 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 Mater 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 Haste 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 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 Tank.

HFL PING EIUIL0 FLOP IOh

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Mr. Norman C. Moseley, Director, Region II Page Two'ecember 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 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, 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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