ML19253B609: Difference between revisions
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unc ronu xs t, u.s. ~uctean necuaronr caus ,ss,on a.m t.lCENSEE EVENT REPORT EXHIBIT A cournot stoc<: 1 I l! I I l@ trtant ena=r on tvrt ALL atouiato NeonMATioN) | unc ronu xs t, u.s. ~uctean necuaronr caus ,ss,on a.m t.lCENSEE EVENT REPORT EXHIBIT A cournot stoc<: 1 I l! I I l@ trtant ena=r on tvrt ALL atouiato NeonMATioN) | ||
FoTO I F vasm) L1 Q Rl Pt 3 lgla0 l0l-lOiuu0l0; ss. OjC s. ,.. . | FoTO I F vasm) L1 Q Rl Pt 3 lgla0 l0l-lOiuu0l0; ss. OjC s. ,.. . | ||
1 ;0;0;a g a4; lu1l1 g l1 g ,v;.<_-[ g o m .... - s | 1 ;0;0;a g a4; lu1l1 g l1 g ,v;.<_-[ g o m .... - s | ||
, . , wa .. | , . , wa .. | ||
M 3 8 y,g i L gl 01 51 01-1 01 310 t 2 gi ; 9tvterQ414 64 ti CoC4E r %V 3(a em 43 0 | M 3 8 y,g i L gl 01 51 01-1 01 310 t 2 gi ; 9tvterQ414 64 ti CoC4E r %V 3(a em 43 0 | ||
t l i Sg7 g9 g j 1,0 jo; 8; 7J 9 [ g | t l i Sg7 g9 g j 1,0 jo; 8; 7J 9 [ g 8 'S a t *'JM f 04 8 6 8J | ||
8 'S a t *'JM f 04 8 6 8J | |||
. vent cascnirties arao nacsastt cosstcusNcts @ | . vent cascnirties arao nacsastt cosstcusNcts @ | ||
I g ,$r 1620 in Mode 1, it was reported that control rod 07-07 partially drooped This created an event contrary to Technig | I g ,$r 1620 in Mode 1, it was reported that control rod 07-07 partially drooped This created an event contrary to Technig | ||
Line 33: | Line 29: | ||
Redundancy NA. No effect upon the plant or general g cal Specification 3.1.3.1. | Redundancy NA. No effect upon the plant or general g cal Specification 3.1.3.1. | ||
o , ,public. This is the fifth occurrence of this type reported. Reference LER's [ | o , ,public. This is the fifth occurrence of this type reported. Reference LER's [ | ||
, , ,77-34, 43, 47, 135. . f I | , , ,77-34, 43, 47, 135. . f I | ||
a i I I | a i I I | ||
Line 39: | Line 34: | ||
' ' ' co . sat. | ' ' ' co . sat. | ||
svsrs.. cause ca si CQct. COCE sLfCO 3 .C'''c% t'.? :03! sL3:001 Jac 4 | svsrs.. cause ca si CQct. COCE sLfCO 3 .C'''c% t'.? :03! sL3:001 Jac 4 | ||
[TT'il | [TT'il l RfB] @ [_XJ | ||
l RfB] @ [_XJ | |||
. ,o n | . ,o n | ||
@ al Zl @ lu 5 , | @ al Zl @ lu 5 , | ||
Line 48: | Line 41: | ||
@ l gg; Lie aoIn7 i 91 1-1 10 I81 51 1. ! 10 13I IL [ --J l0I | @ l gg; Lie aoIn7 i 91 1-1 10 I81 51 1. ! 10 13I IL [ --J l0I | ||
:. a :. a o a a a .. .. | :. a :. a o a a a .. .. | ||
"i.".'.2T;" | "i.".'.2T;" | ||
J.'!,.i'r 'W'ir -o..s @ 'sW % ir .s'* S ei5*2s'J.' . | J.'!,.i'r 'W'ir -o..s @ 'sW % ir .s'* S ei5*2s'J.' . | ||
WJO 'FrYls' Lx inBl @ L2J@ I01 01010! l.L.J@ Lsj@ l; J@ lZl919I9IG n J8;a Zl 8 << a, | WJO 'FrYls' Lx inBl @ L2J@ I01 01010! l.L.J@ Lsj@ l; J@ lZl919I9IG n J8;a Zl 8 << a, | ||
. v <a < <a <> | . v <a < <a <> | ||
cAuss otscaieries n:: matcm E 4: to .s @ | cAuss otscaieries n:: matcm E 4: to .s @ | ||
, o (The cause of this event is unknown. Reactor power was reduced to 60%. Rod 07-07 was pulled from 10% to 25% and position was verified-by zone reference at 25%.i L'_E.J l | , o (The cause of this event is unknown. Reactor power was reduced to 60%. Rod 07-07 was pulled from 10% to 25% and position was verified-by zone reference at 25%.i L'_E.J l | ||
, , g Rod 07-07 was withdrawn to its group average position. No further corrective actt- | , , g Rod 07-07 was withdrawn to its group average position. No further corrective actt-ion deemed necessary. l | ||
ion deemed necessary. l | |||
, a I l | , a I l | ||
.O | .O | ||
Line 69: | Line 57: | ||
, 89_ 13 tt esasos.. . gs a isos.a ts 44 4% SO suvet s tvet Ots;e'*t,0s 4- | , 89_ 13 tt esasos.. . gs a isos.a ts 44 4% SO suvet s tvet Ots;e'*t,0s 4- | ||
[T-l l' 10 ] 010 l@[Z_J@l" NA l | [T-l l' 10 ] 010 l@[Z_J@l" NA l | ||
. .s:ss,'J m 'i n m e,t. n .... s @ | . .s:ss,'J m 'i n m e,t. n .... s @ | ||
NA l | NA l | ||
[TT .l l010 | [TT .l l010 i O ol@lu .. | ||
i O ol@lu .. | |||
.C.*.s v 08 Os ris. L av.aa | .C.*.s v 08 Os ris. L av.aa | ||
. - to*3 | . - to*3 | ||
. 8 40s.o r' 9, I | . 8 40s.o r' 9, I | ||
lll' J 4'I 3/. C, [t NA l f T- .I U, @lu | lll' J 4'I 3/. C, [t NA l f T- .I U, @lu | ||
. W US E G''' ' | . W US E G''' ' | ||
: n | : n | ||
.,b., 8l ,7'it,';. ,,.es 2 | .,b., 8l ,7'it,';. ,,.es 2 | ||
A f | A f | ||
@ / NA l | @ / NA l | ||
.. o IIII IfII I f fI l | .. o IIII IfII I f fI l | ||
%2. s er eateht, - J. Cooper . o.4 (904) 745-6466 h . | %2. s er eateht, - J. Cooper . o.4 (904) 745-6466 h . | ||
(SEE ATTAC1ED SUPPLEMENTARY INFORMATION SEEET) f | (SEE ATTAC1ED SUPPLEMENTARY INFORMATION SEEET) f | ||
. g . ..- . .. . | . g . ..- . .. . | ||
. . 7910160 l t([;(b/ .- | . . 7910160 l t([;(b/ .- | ||
I | I | ||
SUPPLEMENTARY INFORMATION Report No.: 50-302/79-085/03L-0 Facility: Crystal River Unit #3 Report Date: 8 October 1979 Occurrence Date: 15 September 1979 Identification of Occurrence: | SUPPLEMENTARY INFORMATION Report No.: 50-302/79-085/03L-0 Facility: Crystal River Unit #3 Report Date: 8 October 1979 Occurrence Date: 15 September 1979 Identification of Occurrence: | ||
Control rod 07-07 greater than 6.5% (indicated position) away from group average position. | Control rod 07-07 greater than 6.5% (indicated position) away from group average position. |
Latest revision as of 01:38, 2 February 2020
ML19253B609 | |
Person / Time | |
---|---|
Site: | Crystal River |
Issue date: | 10/08/1979 |
From: | Cooper J FLORIDA POWER CORP. |
To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
Shared Package | |
ML19253B608 | List: |
References | |
LER-79-085-03L, LER-79-85-3L, NUDOCS 7910160488 | |
Download: ML19253B609 (2) | |
Text
.
unc ronu xs t, u.s. ~uctean necuaronr caus ,ss,on a.m t.lCENSEE EVENT REPORT EXHIBIT A cournot stoc<: 1 I l! I I l@ trtant ena=r on tvrt ALL atouiato NeonMATioN)
FoTO I F vasm) L1 Q Rl Pt 3 lgla0 l0l-lOiuu0l0; ss. OjC s. ,.. .
1 ;0;0;a g a4; lu1l1 g l1 g ,v;.<_-[ g o m .... - s
, . , wa ..
M 3 8 y,g i L gl 01 51 01-1 01 310 t 2 gi ; 9tvterQ414 64 ti CoC4E r %V 3(a em 43 0
t l i Sg7 g9 g j 1,0 jo; 8; 7J 9 [ g 8 'S a t *'JM f 04 8 6 8J
. vent cascnirties arao nacsastt cosstcusNcts @
I g ,$r 1620 in Mode 1, it was reported that control rod 07-07 partially drooped This created an event contrary to Technig
,, ,from 41*. withdrawn to 18% withdrawn.
Redundancy NA. No effect upon the plant or general g cal Specification 3.1.3.1.
o , ,public. This is the fifth occurrence of this type reported. Reference LER's [
, , ,77-34, 43, 47, 135. . f I
a i I I
L2.M.J l .O
' ' ' co . sat.
svsrs.. cause ca si CQct. COCE sLfCO 3 .Cc% t'.? :03! sL3:001 Jac 4
[TT'il l RfB] @ [_XJ
. ,o n
@ al Zl @ lu 5 ,
IZlZIZIZ18 o IZl8 (.J.]@
e, a-St C.'E %rI Ai. Occ ;4 s t a. t ogscer a s sisicas "gvggr vgag at* Car %3. CO t ~584 No
@ l gg; Lie aoIn7 i 91 1-1 10 I81 51 1. ! 10 13I IL [ --J l0I
- . a :. a o a a a .. ..
"i.".'.2T;"
J.'!,.i'r 'W'ir -o..s @ 'sW % ir .s'* S ei5*2s'J.' .
WJO 'FrYls' Lx inBl @ L2J@ I01 01010! l.L.J@ Lsj@ l; J@ lZl919I9IG n J8;a Zl 8 << a,
. v <a < <a <>
cAuss otscaieries n:: matcm E 4: to .s @
, o (The cause of this event is unknown. Reactor power was reduced to 60%. Rod 07-07 was pulled from 10% to 25% and position was verified-by zone reference at 25%.i L'_E.J l
, , g Rod 07-07 was withdrawn to its group average position. No further corrective actt-ion deemed necessary. l
, a I l
.O
, . 9
's'r*.Ts' , ns= or-t= st2res @ EsE:552I : s:o.in :nr.= r: - @
NA Operator observation i 5
]@ l0 l 712 l@l l l Al@l l agr.gerv CO *1st Loc Ar.ss os =ttaa:a h i e settasa@s
[ZJ LEj@l es ar rut a. :vsrNA:e a:riurv hl l NA l
, 89_ 13 tt esasos.. . gs a isos.a ts 44 4% SO suvet s tvet Ots;e'*t,0s 4-
[T-l l' 10 ] 010 l@[Z_J@l" NA l
. .s:ss,'J m 'i n m e,t. n .... s @
NA l
[TT .l l010 i O ol@lu ..
.C.*.s v 08 Os ris. L av.aa
. - to*3
. 8 40s.o r' 9, I
lll' J 4'I 3/. C, [t NA l f T- .I U, @lu
. W US E G '
- n
.,b., 8l ,7'it,';. ,,.es 2
A f
@ / NA l
.. o IIII IfII I f fI l
%2. s er eateht, - J. Cooper . o.4 (904) 745-6466 h .
(SEE ATTAC1ED SUPPLEMENTARY INFORMATION SEEET) f
. g . ..- . .. .
. . 7910160 l t([;(b/ .-
I
SUPPLEMENTARY INFORMATION Report No.: 50-302/79-085/03L-0 Facility: Crystal River Unit #3 Report Date: 8 October 1979 Occurrence Date: 15 September 1979 Identification of Occurrence:
Control rod 07-07 greater than 6.5% (indicated position) away from group average position.
Conditions Prior to Occurrence:
Mode 1 power operation (72%)
Description of 0 warra.ce:
At 1620 it was reported that rod 07-07 had dropped from 41%
withdrawn to 18% withdrawn. This event resulted in a step drop in reactor power of 3%. Reactor power was reduced to 60%. Rod 07-07 was transferred to the auxiliary power supply and withdrawn to 25% by absolute position indication. Rod 07-07 position was verified at 25% on zone reference lamps.
The rod was withdrawn to its average group position and power was returned to its normal supply.
Designation of Apparent Cause:
The cause of this event is unknown. Troubleshooting of the control rod power supply revealed no immediate cause of this event.
Analysis of Occurrence:
No effect upon the plant or general public.
Corrective Action:
No corrective action deemed necessary.
Failure Data:
This is the fifth occurrence of this type reported. Reference LER's 77-34, 43, 47, and 135.
/rc 1!S4 555