ML20198B656

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Special Rept:On 850805,reactor High Water Level Signal Caused RCIC Sys Injection When Reactor Scrammed on Turbine Control Valve Fast Closure.Three Feed Pump Turbines Tripped & RCIC Steam Supply Isolated.Rcic Injection Secured
ML20198B656
Person / Time
Site: Susquehanna Talen Energy icon.png
Issue date: 11/01/1985
From: Crimmins T
PENNSYLVANIA POWER & LIGHT CO.
To:
NRC OFFICE OF ADMINISTRATION (ADM)
References
PLAS-125, NUDOCS 8511070141
Download: ML20198B656 (1)


Text

1 PPat Pcnnsylvania Powcr & Light Company Twc, North Ninth Street

  • Allentown, PA 18101 e 2151770 5151 November 1, 1985 U.S. Nuclear Regulatory Comissior Doctznent Control Desk Washington, DC 20555 SUSCUDIANNA STF#1 ELECTRIC STATION SPECIAL REPORP - RCIC INJECTICtG ER 100450 FILE 841-23 PIAS-125 Docket No.

50-288 License No. NPF-22 mis special report is required by Technical Specification (T.S.) 4.7.3.d.

mis report documents the Reactor Core Isolation Cooling (RCIC) system injection associated with the scram of Unit 2 on August 5,1985. We Reactor scramned on a hrbine Control Valve Fast Closure due to a Peactor High Water level signal. his signal also tripped the three (3) feedpump turbines and isolated the RCIC steam supply. As the vessel level decreased after the scram, the trip condition cleared, BCIC was reset and manually initiated at 0823 to restore vessel level until the feedptmps could be reset and returned to service. We RCIC injection was secured at 0827. We scram was reported by Licensee Event Report (LER) 85-021-00 dated Septenber 4, 1985.

A Fatigue Utilization Factor Analysis has been performed by the Nuclear Plant Engineering (NPE) group. As of October 31, 1985, the total ntsnber of RCIC actuation cycles is forty-nine (49). A conservative analysis indicates the current usage factor for the affected noz::les is less than 0.70.

N T.M. Crinmins, Jr.

Superintendent of Plant-Susquehanna DDS/pjg cc: Dr. 'Itanas E. Murley Regional Administrator, Pegion I U.S. Nuclear Regulatory Ccumission 631 Park Avenue King of Prussia, PA 19406 Mr. R.H. Jacobs Senior Resident Inspector U.S. Nuclear Regulatory Catmission P.O. Box 52 Shickshinny, PA 18655

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