05000333/LER-1979-108-03, /03L-0:on 791206,reactor Core Isolation Cooling Sys Made Inoperable to Inspect Turbine Bearings.Caused by Observation That Bearings Seemed to Be Operating at Excessive Temp.Insp Revealed No Problems

/03L-0:on 791206,reactor Core Isolation Cooling Sys Made Inoperable to Inspect Turbine Bearings.Caused by Observation That Bearings Seemed to Be Operating at Excessive Temp.Insp Revealed No Problems

ML19257A795
Person / Time
Site:	FitzPatrick
Issue date:	01/03/1980
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19257A794	List: 05000333/LER-1979-108, Forwards LER 79-108/03L-0 05000333/LER-1979-108-03, /03L-0:on 791206,reactor Core Isolation Cooling Sys Made Inoperable to Inspect Turbine Bearings.Caused by Observation That Bearings Seemed to Be Operating at Excessive Temp.Insp Revealed No Problems
References
LER-79-108-03L, LER-79-108-3L, NUDOCS 8001080469
Download: ML19257A795 (2)

LER-1979-108, /03L-0:on 791206,reactor Core Isolation Cooling Sys Made Inoperable to Inspect Turbine Bearings.Caused by Observation That Bearings Seemed to Be Operating at Excessive Temp.Insp Revealed No Problems

Event date:
Report date:
3331979108R03 - NRC Website

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POWER AUTHORITY OF THE STATE OF NEW YORK JAMES A. FITZPATRICK NUCLEAR POWER PLANT DOCKET NO. 50-333 ATTACHMENT TO LER 79-108/03L-0 Page 1

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During normal operation the RCIC System was declared Inoperable to permit the inspection of the systems turbine bearings.

In accordance with the requi rements of Technical Specifications Appendix A, Paragraph 3.5.E, the HPCI System was demon-strated operable immediately and daily until the RCIC was returned to service.

Therefore, the event did not represent any significant hazard to the public health and safety.

Disassembly of the RCIC turbine for inspection of the bearings was undertaken in response to an operator observation that the bearings appeared to be operating at an excessive temperature during a surveillance test of the RCIC System.

Inspec-tion of the bearings did not reveal any damage to the bearings or evidence of over-heating and further investigation of the circumstances yielded the conclusion that welding in the same general area and a small turbine steam seal leak during startup of the RCIC turbine caused the operator to erroneously suspect the existence of bearing overheating.

Following reassembly and testing in accordance with Operations Surveillance Test F-ST-24C titled "RCIC System Flow Rate Test (ISI)", the system was declared fully operable approximately forty-eight (48) hours af ter it was initially made inoperable.

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