ML17252B504

LER 77-057/01T-0 for Dresden, Unit 2 Re While in Refuel Mode During Refueling, CRD D-2 Select Switch Allowed Two Drives to Be Simultaneously Selected Defeating the Refuel Mode one-rod-permissive, Contrary to T.S. 3.10.D.1

ML17252B504
Person / Time
Site:	Dresden
Issue date:	11/15/1977
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 1073-77 LER 77-057/01T-0
Download: ML17252B504 (4)

Text

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' -* CommonweA Edison Dresden Nuclea~wer Station e

R.R. #1

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.t'Y; Morris, Illinois 60450 REBUlATOR -

Telephone 815/942-2920

. yDOCKET FILE COPY

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November 15, 197 7._.

BBS LTR #1073~77 James G. Keppler, Regional Director Directorate of Regulatory gperations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence "Interim Report" #77.:..057 /OlT-0, Docket _11050-237

• is hereby submitted to*your office in accordance with the Dresden Nuclear Power Plant TechnicalSpecification 6.6.B.l.(e), failure of one or more components which prevents* or could prevent, by itself, the fulfillment of the.func::tional requirements of a system u~ed _to cope with accidents.analyzed )j,n the SAR.

BBS:dlz Enclosure cc: Pirector of Inspection &-Enforcement Director of Management Inf*ormation & Program Control File/NRC

_-Nov l 7 1977----~---------i 77:329022:3

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (7-77)

~

e LICENSEE EVENT REPORT e tONTROL

~;

BLOCK:  !---'-~-L----L~_.____._~6\.V If,\ (PLEASE PRINT OR T.YPE ALL REQUIRED INFORMATION)

[~DJ l-i I L I D I R I s I 2 IG)_I0_1_0_1_-_1_0___1 _0........ 1 _0_1__.01_01_...._1_0~1___,OIG)l 4 1* ll ll ll 1101 I I G) 7 8 - 9 LICENSEE' CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T ________________ --------------*--------*-- *----*------ _____ ---*-----------------------*----

--Io I 1, ------~~~~~~TL-1@1 o I s I o I 01 01 21 31 110)11 I 11 01 ll 11 11@1 ll ll ll sl 11 11@

7 8 60 61

• DOCKET NUMBER 68 - 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

[Q]1J I While in the refuel mode during refueling, CRD D-2 (14-07) select switch allowed two

@TI] drives to be simultaneously selected defeating the refuel mode one-r~'d-permissive, contrary to T.S, 3,10.D.l. Plant safety was *noi: degraded besguse the control rod IIill

[QTI] corresponding to D-2 (14-07) select switch was promptly disarmed electrically and

[Q]I] mechanically, This is not a repetitive occurrence, ITE]

CUTI 7 8 9 . 80 SYSTEM CAUSE' CAUSE . COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

[ill] I RI Bl@ ~@ ~@ I r@I ~E_:;.~! r©I f~@f@ ~@ L:J@

7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

~ LER/RO LVENTYEAR REPORT NO. COD6 TYPE NO.

~ REPORT NUMBER I 71 71 21 22 I' I 23 I 0 1 51 71 24 26 I/I 27 I 0l 1 1 28 29 L.:J 30 1=J 31

~-,,

32 -

ACTION FUTURE EFFECT SHUTDOWN (:;:;\ ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT *METHOD HOURS ~ SUBMITTED FORM SUB. SUPPLIER . MANUFACTURER w@LJJ@)

33 34 LI@

35 LU 36 I

37 01 01 01 01

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41 .

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42 LJU@ le I 3 I 4 I s1@

43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

.A follow up report will be submitted no later than December *31, 1977.

7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS IJO'

~

I METHOD OF DISCOVERY DISCOVERY DESCRIPTION @

ITTI) L!!J@ OI OI Ol@)_I_ _ _ NA _ _____. L!J@I Operator Observation 8 9 10 12 11 44 45 46 80 ACTIVITY CONTENT ~

RELEASED OF RELEASE *AMOUNT OF ACTIVITY LOCATION OF RELEASE@

[QI] LlJ@) l..?J@I NA NA 7 8 9 10 11 44 .45 80 PERSONNEL EXPOSURES r:;;:;-.

NUMBER (:;::;\TYPE DESCRIPTION

[2J2Ja Is 01 o I QJ~----*- - - - - - -NA- - - - - - - - - - - - - - -

11 12 13 80 PERSONNEL INJURIES (;";;\

NUMBER DESCRIPTION6

~ ol ol ol@) ___________________________ NA __

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY '43" TYPE DESCRIPTION '\::;J

[2TIJ 7 8

~@ *10-------~-----~-~-~------~~-~--------------..JBO 9

NA PUBLICITY (;';;'\

ISSUED/,;";;\ DESCRIPTION~ NRC USE ONLY .,,

• ~~~---------------------~ 1111111111111~c;;

8 9 10 NA 68 69 80 0

NAME OF PREPARER ____D_e_s_i_*_s_a_n_t:-a_n_n_a_ _ _ _ _ _ __ PHON E:---(_8_1_5_)_94_2_<::"_2_9_20_ _ __ 0.

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Regional Di:ce.ctor A *. -Telecop-_,-_--D-a_t_e-/,-~---,~,,....--/-~

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• _lfirectorate of Regulawy Op.erations

. Region III

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-*** _-*-**-* .-.~- __ /.::.u. S. Nuclear Regulatory Commission __ .... -* .. Telegrannned. GE_l-.J.11..--=-:'.$=-/{..:___

"' -~ 799 Roosevelt Road Glen Ellyn, IL 60137 DC

• -----*--------cc-:--*-----* ______________ ___c. _ _ _ _ _ _ _ ----------*-*--------*-"--------~*--*----By------------.--:------

Director Office of ~1anageinent Information***and

• Prog*ram Control U.S~ Nuclear Regulatory Connnission Washington, DC 20555 I . .

SUBJECT:

, DPR-_!f_, Dresden Nuclear Power Station, Unit 2--

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'I This will confirm a conversation with ~.*~ of your office. at * . j f jv hrs this cl.ate cpncerning 11/-Z/77 iJ-z_ 5e?e.cr Sw/7-c-.il ?V/Y'1~/V /f!~c?

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To C~ll:

• R. B: Stephenson, Superintendent GE - 7~858-2660xl6 I Dresden N~clear Power Station DC 1-301-492-7617 (auto)  : Commonwealth Edis.on Company WU - 615-9.42-4449/43_21 t R.R. Ul .

i Morris, IL. 604*50 Station Dist: Originator (copy) I Inciden~ File (copy) : Telephone: 815-942-:-2920 / 2.9 2lx212

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