ML20028D847

LER 82-162/03L-0:on 821207,w/plant in Mode 1,low Pressure Tubine Stop Valve 2UV-2200V on Low Pressure Turbine 3 Failed to Fully Close.Caused by Excessive Galling Between Disc Stub Shaft & Casing Bore.Stub Shaft Cleaned

ML20028D847
Person / Time
Site:	San Onofre
Issue date:	01/06/1983
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20028D846	List: ML20028D845 ML20028D847
References
LER-82-162-03L, LER-82-162-3L, NUDOCS 8301200018
Download: ML20028D847 (1)

Text

NRC FOIM 366 U. S. NUCLEAR RE*ULATZY COMMISSION LICENSEE EVENT REPORT CONTROL 8 LOCK: l 1

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(PLEASE PRINT 0R TYPE ALL REQUIRED INFORG8ATIONI ITI l8 I9c l ALICENSEE 7

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EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h 1012l lWith the plant in Mode 1, low pressure turbine stop valve 2VV-2200V located on Low I 0 3 l Pressure Turbine #3 failed to close fully and was declared inoperable. Since the l 0 4 laffected steam lead was isolated by closing the control valve on the lead, there _

l 0 s lwas no impact on the health and safety of plant personnel or the public. '(See 1 l

0 s lalso LER's82-153 and 82-154.)

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1010 t I - 80 7 89 DE OE S SCO E COMPON ENT CODE SUB ode S E 17171 IH I A l@ y@ O@ l Vl Al Ll El Xl l@ g@ g @

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42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Ii IO I l The valve was disassembled and inspection revealed excessive galling between the I li li I I disc stub shaft and the casing bore. After machining of the stub shaft, cleaning l

, 7 l and reassembly, the valve was returned to operable status on December 28, 1982. I l

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80 7 8 9 ST S  % POWER OTHER STA TUS IS O RY DISCOVERY DESCRIPTION i s LB.J@ l 01s 10 l@l N/A _l LB.d@l l ACTIVITY CO TENT AMOUNT OF ACTIVITY LOCATION OF RELEASE 1 6 l.2]

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