ML17252A326

LER 77-040/03L-0 for Dresden 3 Regarding the Circuit Breaker for Service Water Makeup Valve MO-3-4102 to the Isolation Condenser Found in Off Position

ML17252A326
Person / Time
Site:	Dresden
Issue date:	10/21/2017
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR #980-77 LER 77-040/03L-0
Download: ML17252A326 (3)

Text

-~

~ :c :eommonwe. Edison

• Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 October 21, 1977 BBS LTR /1980- 77 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III 5()- ~'f'I U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report /f77-040/03L-0 is hereby submitted to you:n office in accordance with Dresden Nuclear Power Plant Technical Speci-fication 6.6.B.2.b., conditions leading to operation in a degraded mode permitted by a limiting condition for operation.

Stephenson Station Superintendent Dresden Nuclear Power Station BBS:dlz Enclosure CC: Dir.ector of Inspection & Enforcement Director of Management Information & Program Control File/NRC

"*'*~ ...... :. ~

77:30601 is

CON'f'ROL BLOCK: .____.__~__. _

e I I

_.__.____6~

LICEN.SEE EVENT REPORT If,\ . (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

[£]2]_1 rl *LI nl RI sl 3IG)I ol ol-1 o lo lo lo lo 1-.lo lo 101 411111111101 I I@

7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T ffiJJ  :~~~~~ ~©I oI s I o I o I o I 2 I 4 I 9 101 o I 9 12 I 4 I 1 11 I© I l I o I 2I 1 I 1 I 1 10 7 8 . 60 . 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@ * .

[§:IIl*-t-I>-u-r4ng *no"rrii.af operation circuit breaker for service water makeup valve (Mo-3-4102) to

[QTIJ the isolation condens~r was found in off position on two separate occasions. Event

[QEJ reportable under T, S. 6. 6. B: 2. b ~j~{'afety significance minimal since two additional

[Q:TI] sources of makeup water available if needed. Event is not a repetitive occurrence.

[Iill

[D2J

[IT[]

7 B 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SU8CODE SUBCODE

[ill]

7 8.

I Cl El@ l(*I@ w@ l cl Kl Tl Bl RI Kl@

9 10

~@ UI@

11 12 13 18 19 20 SEQUENTIAL OCCUR A ENCE REPORT REVISION

. LEA/RO CVENT YEAR REPORT NO. _ CODE TYPE NO.

@ NUMBER REPORT I 71 . 71 . Io 14 l(~J I I/I Io I 3 I ~ I I ~

21 22 23 24 26 27 28 29 c 30 31 32 ACTION FUTURE EFFECT SHUTDOWN (.'.;':;\ ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TA~.E,N ACTION ON PLANT METHOD . HOURS ~ SUBMITTED FOR,M~:;UB. . SUPPLIER MANUFACTURER 1<x1l@W@ WC§) LI I 01 01 01 01 L!J@ ,,~JI@. L!J@ I c Io 1s 10 I@

33 34 35 36 3J 40 41

• 42 I 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

lJITI I Cause of event due to personnel error. Breaker immediately reset. To preyent re-currence breaker has been latched in the on position. This will not preyent normal breaker operation. I ITEl 7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS fJ'

~

O\* . METHOD OF DISCOVERY DISCOVERY DESCRIPTION. ~

(:;::;\

[II}] LJJ@ I o I 9 I o l@._I____NA=--_ _I LA.J~~l____O~p~e~r~a~t~o~r~O~b~s~e~r~v~a~t~i~*o~n::.:-_____________,

7 8 9 10 12 13 44 . 45 . 46 80 ACTIVITY CONTENT ~

RELEASED OF RELEASE AMOUNT OF ACTIVITY '2.V LOCATION OF RELEASE@

~W@W@I NA NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES r::;;:;..

NUMBER A TYPE DESCRIPTION

[I]2] lo 10 lo 1(0~@)L...--------__,.~N=A;___ __,._________,.__,._ ___,

7 8* 9 11 12 13 80

• PERSONNEL INJURIES (;;:;\

NUMBER DESCRIPTION6 ITTI]8 9lo lo lo. 111(§)'--*-*__,.__,.__,.__,.__,.__,.__,.__,.__,.__;,;N=A-*

12 80 LOSS OF OR DAMAGE TO FACILITY f.i3\

TYPE DESCRIPTION ".::.:::)

[!JI) ~@)L--______________.___NA_,_.- - - - - - - - - - - - - - - - '

7 8 9 10 80 PUBLICITY ~ NRC USE ONL y ISSJ.!EDQ DESCRIPTION~ 0

~l1Nl6---------~----~AA~-----~~

8 9. ' 10 68 1111111111111~

69 80 ~

0

~AMEOFPREPARER ________ w_.__P_i_e_t_r_y~g~a___________ PHONE: ________........___________ ll

l ** ,

ATTACHMENi~TO LICENSEE EVENT REPORT 77-040/03L-0 COMMONWEALTH EDISON COMPANY (CWE) i DRESDEN UNIT 3 (ILDRS-3) .  !

DOCKET II 50-249 f

On September 24, l977~ at _1325 hours the control room operator noticed that neither position indication lig):it o_n *control panel 903-3. for valve M03-4102 was lit. This valve is the service water makeup valve for the isolation condenser. When it was determined that the light bulb was t

not burned out, an operator was. sent to the breaker *and discov.ered it .

. was.in the off position. I The breaker was immediately returned to the ori position. ,On.September 29, 1977, the control room operator :reported *to the ~hift *,gngineer that this same breaker.had tripped. The operator performed procedure Doi> 040-1 "S.tation Motor Operated Valves.,; Th'e breaker was reset and the valve was  !

cycled 3 times successfully. A work."request (WR #8634} was issued to ipvestigate the problem. J Upon investigation, it was discovered that the valve had not been operated,* I!

and probably had not "Tripped'.:' due to valve motor operator problems~. It '

was decided that .the.breaker was probably in the "OFF" position, rather th.an tripped as was originally reported to the Shift Engineer. I t was also l!

noted that the breaker required only_ a smail amount of force exerted upon it '

to make it go from "on" to*. "off". The breaker is *1ocated *about waist high

. in a narrow passageway. on Bus 39-1 in the reactor building, and may have been inadvertently bumped.to the off :position *. To prevent recurrence, the breaket was::Jlatthed in the "on'.' position by *cutting a notch in the brea}cer housing into which a sliding metal tab on.the breaker haridle fits. This iI will prevent the breaker from being inadvertently turned -off in the future.

The breaker will still trip as*required when latched in this manner in the event a legitimate. trip signal*is received.

This event-had minimal consequences because there are two additional sup-plies cif makeup water* to the. emergency condenser: Since the operators

.. normally scan the console each shift~ the breaker .in both instances was not off for more than one shift.

• The corregponding breaker on '.';¥,nit (J.d ~ill a,l~o be latched in this manner.

The Unit ,\'JYW breaker is located* in a similar location.

These are the first occurrences of this event at Dresden, and it has not recurred sirice the breaker has been latched.