05000251/LER-1981-013, Forwards LER 81-013/01T-0.Detailed Event Analysis Encl

Forwards LER 81-013/01T-0.Detailed Event Analysis Encl

ML20038C952
Person / Time
Site:	Turkey Point
Issue date:	11/30/1981
From:	Williams J FLORIDA POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20038C953	List: 05000251/LER-1981-013, Forwards LER 81-013/01T-0.Detailed Event Analysis Encl 05000251/LER-1981-013-01, /01T-0:on 811116,during Refueling Operations, Containment Momentarily Breached by Having Both Inside & Outside Doors of Personnel Hatch Open.Caused by Disabled Dog Ear Positioner in Air Lock Side.Dog Ear Repositioned
References
NUDOCS 8112140291
Download: ML20038C952 (2)

LER-1981-013, Forwards LER 81-013/01T-0.Detailed Event Analysis Encl

Event date:
Report date:
2511981013R00 - NRC Website

text

P O. B0 X S29100 M1 AMI, F L 33152

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FLORIDA POWER & LIGHT COMPANY 4

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November 30, 1981 PRN-LI-81-523 Mr. James P. O'Reilly, Director, Region II Of fice of Inspection and Enforcement U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta Georgia 30303

Dear Mr. O'Reilly:

REPORTABLE OCCURRENCE 251-81-13 TURKEY POINT UNIT 4 DATE OF OCCURRENCE:

NOVEMBER 16 1981 TECHNICAL SPECIFICATION 3.10.1 PERSONNEL 000R INTERLOCK The attached Licensee Event Report is being submitted in accordance with Technical Specification 6.9 to provide prompt notification of the subject occurrence.

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REPORTABLE OCCURRENCE 251-81-13 Licensee Event Report Page two Additional Cause Description and Corrective Actions The violation was discovered immediately and corrected within about two (2) minutes. The interlock was reinstated within the following 30 minutes.

l Investigation revealed that the interlock mechanism was operable approx!mately one (1) hour prior to the above observation.

The item that was found to be at fault is commonly referred to as a " Dog Ear" in the air lock side of the inner door. It appeared that the " Dog Ear" had been knocked out of p0$ition thus allowing the door latch mechanism to be placed in the

" Latched" position with the door remaining open. The mechanical interlock set in the " Latch" position allowed the outside door to open thus leaving both doors open.

The " Dog Ear" was repositioned and the operation of the doors tested and verified to work properly.

l The following additional corrective action will be taken:

1 1)

All plant and contract personnel will be instructed on the importance of maintaining containment integrity as required by our Technical Specifications.

2)

A Plant Change and Modification (PC/M) is being written to provide the following:

a)

Limit switches which sense actual door position, rather than latching mechanism position, will be added.

b)

Additional circuitry will be installed to provide a redundant actuation of the " Interlock Violated" alarm.

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