05000250/LER-1979-010-03, /03X-1 on 790319:excessive Leakage Noted at Inner Personnel Airlock Door/Bulkhead.Caused by Packing Leak Along Operating Shaft at Inner Bulkhead.Local Leak Test Completed Successfully

/03X-1 on 790319:excessive Leakage Noted at Inner Personnel Airlock Door/Bulkhead.Caused by Packing Leak Along Operating Shaft at Inner Bulkhead.Local Leak Test Completed Successfully

ML17338B046
Person / Time
Site:	Turkey Point
Issue date:	08/06/1979
From:	Schoppman M FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17338B045	List: 05000250/LER-1979-010, Forwards LER 79-010/03X-1 05000250/LER-1979-010-03, /03X-1 on 790319:excessive Leakage Noted at Inner Personnel Airlock Door/Bulkhead.Caused by Packing Leak Along Operating Shaft at Inner Bulkhead.Local Leak Test Completed Successfully
References
LER-79-010-03X, LER-79-10-3X, NUDOCS 7908300681
Download: ML17338B046 (2)

LER-1979-010, /03X-1 on 790319:excessive Leakage Noted at Inner Personnel Airlock Door/Bulkhead.Caused by Packing Leak Along Operating Shaft at Inner Bulkhead.Local Leak Test Completed Successfully

Event date:
Report date:
2501979010R03 - NRC Website

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Additionally, a leakage path through the outer personnel'airlock door/bulkhead may have existed.

A local leak detection test of the personnel airlock had been jaaoJ

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The root cause was a packing Teak a 1ong an op erat ing shaf t at the inner bulkhead.

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A local leak detection test and a vacuum test of the volume between the personnel airlock door "0-rings"

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REPORTABLE OCCURRENCE 250-79-10, UPDATE 81 LICENSEE EVENT REPORT PAGE TMO Additional Cause Descri tion and Corrective Action:

The leakage during the XLRT was determined to be in the area of the personnel airlock.

The leakage paths at the pressure boundary defined for the ELRT were through (1) the containment-to-airlock equalizing valve packing gland, (2) the inner, bulkhead airlock-to-atmosphere valve indicator seal gland, and (3) the inner bulkhead containment-to-airlock seal gland.

Additionally, a leakage path existed around the "0-ring" seal oa the outer airlock door.

The leakage paths at the pressure boundary were eliminated 'by tightening the packing gland and by pumping grease into the seal glands.

The leakage path around the outer door was eliminated by reinstallation of shims behind the locking keeper of the latching mechanism.

(The shims had been removed a few days prior to the ILRT to permit easier operation of the airlock door.)

As a precautionary

measure, new seals will be installed on all through-bulk-head operators of both Unit 3 and Unit 4 at the next extended cold shutdowns.

Additionally, our.proposed license amendment (reference letter L-77-239, dated July 27, 1977) pursuant to Appendix J of 10 CFR 50 provides assurance that leaks of the above type will be quickly detected.