ML19294B759

LER 80-012/03L-0:on 800211,while Performing Routine Surveillance Test,Control Element Assembly (CEA) 35 Dropped Into Core.Cause Unknown.Technician Will Be Assigned to Monitor Operating Parameter of All CEAs During Next STP

ML19294B759
Person / Time
Site:	Calvert Cliffs
Issue date:	03/03/1980
From:	Bauer E, Davis S BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19294B754	List: ML19294B753 ML19294B759
References
LER-80-012-03L, LER-80-12-3L, NUDOCS 8003050476
Download: ML19294B759 (1)

Text

'

LICENSEE EVENT REPORT I l l l (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

CONTROL BLOCK: l l l l 6 7

0!t I8 M 9 l DLICENSEE lClC CODE l ft i l14 l@l15 0 l o l- 10 lLICENSE 0 l 0NUMB l 0ERl 0 l- l 0 l 025 l@l26 4 l1 l1 l1TYPE LICENSE l

l 1Jol@l67 CAT $8 l@

CON'T R

7 8 57R$lll@l015l010l0131117l@l01211Il1810l@l01310131810l@ 68 69 EVENT DATE 74 75 REPORT DATE 80 60 61 DOCKET NUM8ER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h O 2 i At 2134 while perfoming a routine surveillance test, control element i O 3 I assembly (CEA) 35 dropped into the core (T.S. 3.1.3.1). CEA-35 was I FO 4 l withdrawn and leveled with its group at 2152. All other CEA's remained i O I s 1 I operable during the event. The reactor was in Mode 2 at if, power during i 10lcI the event. LER's 80-6 (U-1) and 80-9 (U-2) describe similar events. 1 0 7 l l O 8 l  !

E ODE SUSC E COMPONENT CODE SUSCbdE SU E O 9 l R l B l@ lX ]@ lZ l@ Zl Zl ZI ZI Zl Zi@ [XJ@ [Z_j @

7 8 9 10 ft 12 13 18 19_ 20

_ SEQUENTIAL OCCURRENCE REPORT REVISION LER EVENT YEAR REPORT NO. CODE TYPE N O.

@ ,aeg/ROu .l8 l0 l l-l 0 11 l2 l l/l l 0l 3l lLl l-l l 01

_ 21 22 23 24 26 27 3 M 30 31 32 K N AC 0 0 PLANT MET HOURS S8 IT O FOR b 8. S PPLIE MANUFACTURER lZ l@l34XI@ l35 Zl@ l36Zl@ l 01 01 01 0l l Nl@ l42NI@ l43 Zl@ lCl4l91Ol@

33 37 40 41 44 47 CAUSE L tCRIPTION AND CORRECTIVE ACTIONS i O lit is u. ':nown why CEA-35 dropped: the rod was raised by the operators I m1 18 minutes after it dropped. It is planned during the next STP 0-29 i

, 2 I to have a technician monitor the operating parameter of all CEA's in i

. a l order to detect any intemittent problems and take corrective action. I i 4 1 __J STif seOwER Orw ER STATUS @ 5'SCONRY DiSCOvERv oESCRieTiON @

1 s l_E_J@ l 0l Ol 11@l NA l 18l@lOperatorObservation -

ACTf ViTY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTivlTY LOCATION OF RELEASE 6 NA l NA l 1

@ l' Zl@l "

l

,ERSONNEt ExpOSSES NuM8ER TYeE oESCRirTiON@

1 7 l o l O l 0 l@[_Zj@l NA l eE RSONN E't iN;UliES NuM8eR DESCRipriON@

I7 M ' 8 9 l010lOl@l 11 12 NA 80

'"^

i 9

'S$

T E ' US R ?Ti# '^ " @

(_Zj@! NA gooao5o sj g l 7 8 9 10 80

'"* NRc use ONLY 2 O issue IN l [@oISCRipTiON NA g I i lI IIIIIi11l; 7 8 9 10 68 69 80 ;

NAME OF PREPARER

3. . ovis /E. R. Bauer pgoyg; (301)269-4742/a728 ,

,