ML19308D550

RO-77-34:on 770406,Rod 3,Group 2 Dropped Into Core & Quadrant Power Tilt Steady & Transient Limits Exceeded. Caused by Central Rod Drive Mechanism Stator Failure.Stator to Be Renewed

ML19308D550
Person / Time
Site:	Crystal River
Issue date:	04/27/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D545	List: ML19308D544 ML19308D550
References
NUDOCS 8002280982
Download: ML19308D550 (1)

Text

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• NAME LCtNT.E NUMC(It TYPC TYPC l1.1clnl91,1 10101-l0101010101-1010__l l4 l 11111 ll l 10l3I '

7 UD 14 1b 23 c

'u 30 31 32 CAttcoriY vE s[/uE WW occxtf NUMUCR nCPortf oAvC CNT oATE QCOtrT l -l -j l 0l 5l 0l-l 0 l 3l 0 l 2 l l 0l 4l 0l 6 l7 l7 l l 0l 4 l 2 l7 l7 l7 7 0 57 50 53 60 G1 G8 69 74 73 UL EVENT DESCDIPTION Ql 7 09 In Mode 1 operation, Rod 3, Group 2 dropped into core and quadrant power efit steady *

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n3 l and transient limits were exceeded contrary to Technical Specifications 3.1.3.1 and I 7 09

• B0 o l 3.2.4, Table 3.2-2, respectively. Redundant systems N/A. Rod was withdrawn and parked I 7 u9 80

[0I$l l out limit. This is the seem d occurrence of this tvoe. >' I 7 0S BC Ql 7 09

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rnue e aos COMPoNfNT CCog A VOLATCN Q l Rl Bl lE l 7 09 to 11 l Cl Rl Dl Rl Vl El 12 17 W43 44 lD l 1l 5 l 0 l 47

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• CAUSE DESCRIPTION '8

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Ql Failure of Red 3, Group' 2 CRDM stator caused rod to drop with resultant power tilt. l 7 89 GO Ql Stator for Rod 3 will be renewed during next scheduled outage. l 7 al CO

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- FACAfTY METHoo CF STATUS  % POWER oTHER STATUS escovCnY oCCoVtnY otSCR:Pf;CN 11 1*U 9 lE l l0l8l6l

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l N/A l l Al l N/A l 10 12 13 44 45 46 SO

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AucuNT or Actrvity LocATCn on nELCASE b

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11 N/A l 44 l

45 N/A

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PERSOf 4NEL EXPOSURES NUMUER TYPE otSCRIPTON

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CU OFFSITE CONSEQUENCES

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LOSS On DAMAGE TO TACILITY <

1YPC etCCit!PTON e E uD Iz J l N/A __l 10 CU PUOLIC11Y

$l 0 N/A _ _._ l CU

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ITIONAL FACTORS 1

, At no time did the flux power tilt exceed the maxistum limit set forth by Technical _ ,, .l-

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(! 11 Specifications. ,,-

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8002 286 9PA . .1 lHf i N w c. wi P. Stcunre it I/ - e puont. l g n pr,4_..15q,_ ,

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