ML17252B537

LER 80-046-00 for Dresden 2 Regarding a Failure to Receive CRD Volume During a Reactor Scram

ML17252B537
Person / Time
Site:	Dresden
Issue date:	12/30/1980
From:	Commonwealth Edison Co
To:	NRC/RGN-III
References
LER 80-046-00
Download: ML17252B537 (2)

Text

ltft<. "'d-a'ftW 31Jf/. 'O'.*'!... ftot.:c. 'l:ltW 'R!GotJ( rtrR1' 'Ctil61M 1ss1d"'1 7-771' .; .* *  :

• I * .,. *

'/ ~**"'".*. *:,_/ I

• LlCENSEE~EVENT AE~ORT *A . . . .

l

/< . CO~;.fl'.~LBLOC*K' +

' ' ' ' ... . . *1 r.. l .* I*: I* ' 1.0. . . .

.. . 6*;.. .. . '

(PtE:ASE.PRINT*o*',TYP~L REQUIRED'INFORMATIONI EJ.:r rf ' 11

• -8:. 9*

D:j. Rr,:s I; 2:.i@r:o}o.1:.-:.~.:1 o:fo** Io~* 1'6 Io* . 1.:...*. ro: 10:-; l@F*4f1*:r1*1:1 Tr.101*' 'I.' I:(~)'. .

LICENS.EE'COOE'.*  :*1.4 ,15:,* ... * . ,.LICENSE.NUMBER. . . * :. ..*,. 25:*. '.26-. *: LICENSE:.TYPE .. J.O: . .57:CA'L58* ..

CON'.T' **

• _:' . . ., , .. * *.* . . . . . . . .

• ITIJ: ..

. 8-..

~~~~~- (t l@J.:oj; *s* 1*a-1*0lo*12* j:'3 Ti- ©It 12 TO* 12** 1&: '16**.. *101*r 1>2: l*3l'o:1 a*.*I 0

. 60' . ' 61 . ' DOCKET NUMBER. '. . *ss.. 69, EVENT.CATE:** 74 75.. REPORT CATE  ;

rev

' 80:

• EVE.NT'DESCRIPTION*ANO PROBABLE.CONSEQUENCES@ '.. . . .

..:. ,. o....l"""2""'j'.'IDuring *a* reactor'*s*cram, failed *to receive CRD volume  : HI,;_Hi Ievei: alarm*.* The' saf'ety* L

. I . . . . . . . . . *. . . . . . . . ..

nIJ. lsignifiCance* of this event~ was:m~nimal' since 'it did. n_ot affect* the scram' function. and

• l 1

0 j r jthe scram* d~t~charge' instrument* volume~ level switches . wete opetab*le<. Public health* and 4-. F' 0 ! s.r. 1'safety were Jlot: affected*~. :This *iS* the. first. occurrence of' this :type at Dresden~ L' o 1s1,~*---------*~i-*---------------------------------------------------------------'

oI I 1

~s.

r s 9'-------....;...--------...-------------~-------....;...----------~so* .

. SYSTEM'. CAUSE:. 1

• CAUSE*. COMP, VALVE'*

CODE:* CODE' ' ' SUBCOOE COMPONENT'COOE. SUBCOOE: *suecooE' 9

1* I 1. EI@

10. '11 w@.< l.s 12

. .1@* I I l'N I

• 13, s~rr-1 R I u 1B I@ lli.:...]@' w@

19. 20*

SEQUENTIAL OCCUR*RENCE"

• REPORT . REVISION.

• @N~£~~~.~r~NT(oEAf".... ,. ' I I R;TRZ.1°6-t ,, I /L roc°i°;* L ' ITY~\. . I L' IN;* 1

' L2~**' 22-.. 23 .. 24, 26 27 28* 29:* JO 31. 32~

ACTION FUTURE. <, EFFECT SHUTOOWN . . .. , ~- . ATIACHMENT'*.* NPRQ.4: PRIME COMP:. 'COMPONENT *

. TAKEN" ACTION  ; ONPl:ANT .:*:'._.METHOD-,.*: . . . . *., _HO.URS'.\~/**. SUBMIT.TEO~* : *FO.RM:>UB. *... SUPPLIER': , MANUFACTURER':'

.. W@W:@r, L~J@.:_:* . L!J@*~. *.I o I o I" o I o t . l!J.@ .L!!J.@.' Ll.1@.:.*' IN* 11 19 11 *I@

33.' 34 . ' 35 . J6.,, ' ' ' *.J'] ' . 40,.. 41 ' ' ' 42 43,. 44' ' ' 47 CAUSE'DESCRIPTION.ANO:CORRECTIVE:ACTIONS*@* * *

} 1 Io fr TI1e cause was. attributed to cable* length* and* routing*:;* transducer placement and mounting,1 *.

1  ! 1 1 land redundant transducer signal interference .. *The cables . were shortened- an& rerouted L

1 I2 I I transducer placement-. optimized* mounting mod-ified, and. transducer synchronize'd to the.

i*

IJJJ. ,. saine 'internal clock~ The: syste~ was. *then satisfactorily-tes.ted. The *same* improvementsl

Im I will be mad.e on Dresden' Unit: 3. I

8 9'. 80 Ffr~~'V  % POWER ' .* o;.~R*S~~TUSc' @ ~I~~~~~ DISCOVERY DESCRIPTION @)

ITIJ' l.x..J@: I 0 I 0 8 9 -10* .

• I 0 1@)1>.

12:* 1'.l N/A. 1.

44..

~@ ....

45 AS l_O.._p_er_a_t_or_:._O_b_se_rv_at_i_o_n_ _ _ _ _ _____.L 80 ACTIVITY CONTENT ' . C\ .~

~ELEASEO OF RELEASE. .

• AMOUNT OF ACTIVITY ~ LOCATION OF* RELEASE:~ .

l-1--"i~@ ~~t. N/A .

44 ts. N/A 80:

PERSONNEl:.*EXP.OSURES: . 'r.:;;:;\ .

' NUMBER ' ; ' TYPE DESCRIPTION\~;

II!l 1o Io Io l@Ll.J@ __._ _ _ _ N/_.A._ _ _ _ _ _ _ ___,.,.______________,

8 3. 11 12; 13 80 .

PERSONNEL INJURIES. . : /;;;\*.

DESCRIPTION\~/*:,*

IE. 8, 9 j'

'NUMBER ol. ol ol@) :. . . .

11 N/A.

• . _ i 2 - : * - - - . - - - - - - - - - - - - - - - - - - - - -........- - - - - - - - - - - - - - - - - a ' " ' o . *.

LOSS OF-OR DAMAGE 1TO*FAC1LITY:*f.G\* *

~ TYPE DESCRIPTlpN * . . . *. ~ **

,.:....L..:.J. LU@ ' ' I ' ' . N/ A *.

' ' 8: .'9 10 ' ' '. ,, ao*

~* ISSU;~Q\. BLl~;;~~IPTI~~@ *.: .

. NRC USE ONLY

• D

~.J..~..L Lli..Je;I . .*

• I . NI A l 1* I I: J *. I I I I Id I -I I I ~.

a. 9 10 I 68 69 ao.;;;

~- -]::r.*"}..';t.* .* "-.

• • . .* DEVIATION* REPORT * . *

' JJVR:.-No.*. . .

• * :* * . STA':. UNIT.' YEAR?. NO:.

It'-* !2 - 2. -

• 80--.: 8L .

PART. ll*Jl Tl£. OF- DEVtl ATl'ON:: * ...... OCCU.RREO . .

• .12-2-80 2215*

DATE TIME. ~

SYSTEM**AFFECTEO> .

. ' 300

, ..* PLANT CONDITIONS,*

..o*

TESTING .

r,;-i**

• .~,;.

Control Rod* Dr.ive: System*.*. . MODE' Run* PWR'(MWT) . l:OAC(M~)-_'

368 YES'" NO:*

DESCRIPTION OF EVENT.

• During**a: reactor scram*,, .. failed to-get.ala~. 902:-4~- F-21. "SDV*Hi Hi".<-

DESCRIPTION OF CAUSE.

Unknown *at this* *t iiiie* *..

. OTHER APPL I C~BLE *I NFORMAT.I ON N/A.

EQUIPMENT CiJ.Yes* DR' NO.~ WR: NO; ..,-

12-3-80.

• D*. McDowell FAILU.RE. . Q:No., " N/A Dl0353 . *RESPONSIBLE SUPERVISOR* DATE PART 2. I OPERATING ENGi NEERS COMMENTS

• Complet.ed SDV air test,. instrument. volum~ level. swit.ch test .and: ihdepend.ent UT verification.

Initiated ind'ependent*. manual UT yeri*fication of SDV once' per< shift .on' Units* 2 and 3.

. . SAFE.TY-TYPE'. OF DEVIATION EVENT OF* POTENT! AL.

• TE:CH: SP'EC' ,, NC°N._ REPORTABLE" .. ANNUAL RELATED "0: .o*.

REPORTABLE OCCURRENCE::

• PUBL:lC: I NTERE:sr: ..* . .. VIOLATION-0.,.

OCCURRENCE REPORT I NG.

YES:

~

. WR ISSUED YES GI.

14 DAY o.

1?CFR2.F

• * [!]* 3 ~. DAY: NOTI F:t*CATlON 6.6.B.2.b D' . No .. o* NO D

.. REPOR~t~~~k:CCCUR~ENcE* *ACT! ON ITEM NO*. PROMPT* ON-.. S I TE NOTIFICATION .

- R. M. Ras~ui 12-9-80' -* ..

m, 80-A6 I 03L-O" Tl TL£ DATE TIME Tl TLE

• DATE TIME,

• • . 24-HOUR NRC NOTJ.F:l CAT:J ON . PROMPT OFF-SI TE NOTI FICATl'ON i

DT?H NRC..;ENS Ehone* 12/2/80 2300 hrs. F. A~ Palmer 12-10-80 *9*:03 AM REG l*ON,

• I* I I DATE Tl.ME** Tl TLE. DATE'. TIME DTGM .. ., .

REGION,! I  ! &. DOL* CATE TIME. Tl TLE: . DATE TI ME RESPONSl.BLE COMP:ANY'.OFF:lCER *INFORMED OF CONDI Tl ONS AND THEIR REPORT TO* NRC

• IOCFR2J

... TITLE DATE TIME c I . .

REVIEW* AN.D .COMPLETED' - John W. Wuj ciga 12-8-80 OPERATING. ENGINEER DATE D.ATF.:

\

RESOlUT I ON APPROVED. ANO' 12/s.}Pc AUTHOR i ZED~ FOR. 0 I' STR i SU Ti ON

• DATE

• aa-s,n*s:. 10*11** !FoRJ. 1s-*s*z*~1.

~- I . J, ...... *,*'-'. . .**