ML19308D576
| ML19308D576 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/22/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D577 | List: |
| References | |
| NUDOCS 8003040947 | |
| Download: ML19308D576 (2) | |
Text
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o1 lflL'I ClR lP l 3 l l0 l0 l-l0 l 0 l 0 l 0 l 0 l-l 0 l 0 l l 4 l1 l1 l1 l 1l l0l3l 7 G9 14 15 25 26 30 31 32 CATEGOAY ' 7P CCCKET NUMBEA EVENT DATE REPCAT QATE T
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@ CONT l l -l l Ll lL l l0l5l0l-l0 l3 lo l? l l0 (6 (2 l9 l 7l 7l l 0 l 7 l2 l2 l7 l7 l 7 0 57 50 59 60 61 68 69 74 75 EVENT OESCRIPTION gl During power operation, the absolute position indication for regulsting rod 3 of group 6 7 89 L
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was declared inoperable contrary to Technical Specificatien 3.1.3.3.
Redundancy was
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7 0D gg l maintained with the relative position indication.' Second occurrence of this event.
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l Group 6 rods were withdrawn to 100% level and verified. Action statement satisfied l
7 09 (LER 77-71) gl in 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> and 7 minutes.
7 89 PaME
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cCMPCNENT CCCE CT vcLArcN 0
lTlDj l El lIl N l S l Tl Rl Ul lNl l A l3 l8 l0 l lN l 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION g
g l This event was caused by the failure of the absolute position indicator tube.
The P.I.
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l ttthe tr n a remot ed n14rmaA neA rearm,nA mmor,%To 9
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FACUTY METHoo CF STATUS
% POWER OTHER STATUS CISCQVERY OfSCOVERY DESCAST'CN Q
[E l l0l7l2] l NA l
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l NA 70 9
10 12 13 44 45 46 E
ACTIVITY CCMTENT AMOUNT OF AcTMTV LoCAT:CN CF RELEASE CFRELEASEl RELEASEo d
NA l
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1 7 8 9
10 11 44 45 i
PERSONNEL EXPOSURES NUMBER TYPE CESC2PTICN 113 l0l0l0l dl NA 7 89 11 12 13 c
PERSONNEL INJUAIES NUMBER CESCR$PTICN
@ l0l0l0l l
NA 7 89 11.1 2 i
OFFSITE CONSEQUENCES
@l NA 7 89 r.
LOSS OR OAMAGE TO FAC:UTY TYPE CESCRPTON NA 7 89 10 PUBLICITY NA
' 89 ACOtTIONAL FACTCRS EE CEED SUPPLEMENTARY INFO'RMATION 7 89 8 0 0 3 0 el. 0 N7
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7 89
/
W. P. Stewart
/
PHONE:
(313) 866-4159 NAME:
cro en s. c -
-g s
h SUPPLEMENTARY INFORMATION 1.
Report No.
50-302/77-71 2.
Facility:
Crystal River Unit #3 1
3.
Report Date:
20 July 1977 4.
Occurrence Date:
29 June 1977 5.
Identification of Occurrence: Regulating rod 3 of group 6 Reed switch position indicator inoperable contrary to Technical Specification 3.1.3.3.
6.
Conditions Prior to Occurrence: Mode 1 power operation.
1' 7.
Description of Occurrence:
At 2053, during power operation, the absolute position indication for rod 3 of group 6 failed. Group 6 rods were withdrawn to the 100% level in order to verify the group position as required by the entered action statement. The absolute position indicator for rod 3 was repaired and the action statement was ended within 15 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br /> and 7 minutes.
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]
8.
Designation of Apparent Cause:
This event was caused by a failure of the absolute position indicator tube for rod j
3 of group 6.
i N.
Analysis of Occurrence:
There were no safety implications as position indication was maintained using the
. relative position indication and complying with STS 3.1.3.3 action statement.
i i
10.
Corrective Action:
j None required as repair was effected through normal maintenance.
II.
Fai3ure Data:
This was the second occurrence of this event. Refer to LER 77-33.
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