ML17173A714

Forwards LER 79-013/03L-0

ML17173A714
Person / Time
Site:	Dresden
Issue date:	03/23/1979
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A715	List: ML17173A714 ML19263D325
References
79-251, NUDOCS 7903270448
Download: ML17173A714 (2)

Text

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Commonv.Ath *Edison Dresden NLi;l~~wer Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 March 23, 1979 BBS LTR ti 79-251 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report II 79-13/03L-0, Docket. //050-237 is hereby submitted to your office in accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

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Station Superintendent Dresden Nuclear Power Station BBS:lcg Enclosure cc: Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC 7 9 0 3 2 7 0 4L/f

.* (7. 77.J,____ j .'~ ' . LICENSEE EVENT REPORT

. CONT~OLBLOCK:

I1* I *I

• I 1Q !PLEASE PRINT OR n . L L REQUIRED INFORMATION! .

6

[212] Ir IL In IR Is I 2  !(~)lo Io 1- Io lo Io Io Io 1- lo lo 10)1 411 I l I i I i 101 I 10 1 8 9 \..ICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 C' ... )

--:CON.'.:f.----;-  ;

[I[i].  :~~~~~ L:J©I 0 I 5 Io Io Io 12 13 17 !GI o 12 12 13 17 19 @I o I 3 I 2 I 3 I 1 I 9 IG) 7 8 60 61 DOCKET Ni.JMSER 68 69 EVENT DATE 74 75 REPORT DATE SO EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES {1o)

• I While UJ was shutdown and U2 at steady' power, 2/3 D/G was manually started prior to

((II] I takin8*32 transformer out of service .. 15 min. later CLG. water pump breaker thermally

. ((ill I tripped and auto .. transferred to *redundant power supply. Tr:lp reset manually and re-

[QI[] I turned to original power supply. After 20min. tripped again.* The redundant power

[]JD I supply was also.. found tripped. Trips reset and ran successfully. Since redundant 02]. ID/G's were available, *safety significance of this incident is minimal. Last trip occurred on 6/30/78 (LERU18-41/Q3L-O)

((ill 7 8 9 60 SYSTEM. CAUSE CAUSE COMP. VALVE CODE CODE SUBCOOE . COMPONENT CODE SUBCODE SU BC ODE

[Iill' I El El@ w@ UJ@ Ip I ul MI p Ix Ix I@ L!J@ UJ@

1 a 9 10 11 12 13 . 16 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

~ LE A/RO CVENT YEAR REPORT NO. CODE TYPE NO.

\!.:J REPORT N.UMBER I I I 7 9 I I I 01 i1. JI. I/I Io I J I ~ l=.l ~

21 22 2J 24 26 . 27 28 29 JO 31 J2 ACTION FUTURE EFFECT SHUTDOWN. * (.;'.:;\ ATTACHMENT NPRD-4 PRIME COMP.

• COMPONENT

• TAKEN ACTION. ON PLANT .METHOD HOURS ~ SUBMITTED FORM ::;us. SUPPLIER* MANUFACTURER W@W@

JJ 34 W

JS LU JS I 01 37 01 01 °1 L.::..1@

• 40 41

• l.lJ(§.

42

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43 I

. 44 c 1 6 18 13 I@

47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @ .

QliJ I Cause unknown. Load check and motor bridge and meggar were performed.* No fault .found.I OJJJ I Pump temperature, discharge pressure, and vibration were normal while running. Pump

[)))) I has been run 3 times since with no failure. Additional checks will be performed during!

. fIII] I the upcoming biannual insp. I r.tm8 1 9 80 FACILITY . 13Q\ METHOD OF STATUS  % POWER OTHER STATUS \.:::;:J DISCOVERY DISCOVERY DESCRIPTION @

ITTIJ 1 8 lli.J@ I g Bl ol@._I_U_J_s_h_ut_d_own_*_

9 10 12 11 44

• Ul@I Operational Event 45 46 80 ACTIVITY CONTENT . ~

RELEASED OF.RELEASE AMOUNT OF ACTIVITY~ LOCATION OF RELEASE @

~

1 8

.l.Ll@ W@ I..._N;;.;.;;A.;___ _ _ _ ___.

9 . 10 11 44 r

45 NA 80 PERSONNEL EXPOSURES r.;;:;"\

NUMBER A TYPE DESCRIPTION

. III2J 1 8 lo 9

I al ol0LLl@11 12

.NA

• 1~3~~~~~~~~~~~---~~~~,....-~~~~~~~~~~~~~~~~~~~80 PERSONNEL INJURIES Q

. NUMBER DESCRIPTION~

~lo lo lo l@)~~N~A;_.._.~*~~~~~~~~~~~~~~~~~~~~~~~~--1 1 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY t4j\

TYPE DESCRIPTION '.::.::)

ITliJa 1

Lz_j@ . NA 9 1~o~---~~~~~---~~~~~~~-~-~~~-~~~~--~~-~~~~~~~~-8~0 PUBLICITY Q ISSUEOf,;'";;\ DESCRIPTION~ 7 9032 NRC USE ONL y o lITIJa llLJ61 NA ,

7 O 4 5 .3 .I I I I I I I I I I I I I I:

1 91 ~o~~-~~--~~~~~~~~~~~~--~~~~~-~~--'68 69 80*;

• J. Chan X-421 0 MJ\l.tC nc DCCD/\CCO PHONE:-------------

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