ML20002A790

LER 80-058/03L-0:on 801009,plant Was Operated at Power W/ Emergency Feedwater Supply to Loop 1 Helium Circulator Water Turbine Driver Isolated to Repair PV-21243-1 Line Leak. Caused by Erosion Inside Line at 90 Degree Elbow

ML20002A790
Person / Time
Site:	Fort Saint Vrain
Issue date:	10/31/1980
From:	Gahm J PUBLIC SERVICE CO. OF COLORADO
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20002A788	List: ML20002A787 ML20002A790
References
LER-80-058-03L, LER-80-58-3L, NUDOCS 8011210581
Download: ML20002A790 (1)

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EVENT DESCRIPTION AND PRosAeLE CONSEQUENCES h F6Til IFrom 0830 to 1830 hours0.0212 days <br />0.508 hours <br />0.00303 weeks <br />6.96315e-4 months <br /> on October 9,1980, the plant was operated at power with emer-[

("dTTI lgency feedwater supply to Loop 1 helium circulator water turbine drives isolated to I l o 14 l Irepair a line leak downstream of PV-21243-1. Degraded mode of LCO 4.2.2(a). Re- l i

o s l portable per Fort St. Vrain Technical Specification AC 7.5.2(b)2. Similar occurrences l l o is i treported in RO 80-15, 80-23, and 80-32. No af fect on public health and safety. l I

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21 2< ao 27 <0 <s a2 ss l CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 I i I o l lCause of line leakage was due to erosion inside the line at a 90* elbow due to water l A 1/2" pipe nipple was I g l splashing'against the area as it flows through the piping.

l g ] replaced and the system returned to service. A request for design evaluation has

!- t 3 lbeen submitted to Nuclear Projects Department. Results to be submitted in a future i l

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