ML17252A272: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:Commonwec9  
{{#Wiki_filter:Commonwec9  
Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois  
Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone  
60450 Telephone  
815/942-2920  
815/942-2920  
BBS Ltr. # 333 April 20, Mr. James G. Keppler,  
BBS Ltr. # 333 April 20, Mr. James G. Keppler, Regional  
Regional  
Directorate  
Directorate  
of Regulatory  
of Regulatory  
Operation  
Operation  
-Region I I I U. s: "Nuclear  
-Region I I I U. s: "Nuclear Regulatory  
Regulatory  
Commission  
Commission  
799 Roosevelt  
799 Roosevelt  
Road Glen Ellyn, 111 inois 60137 REGULATORY  
Road Glen Ellyn, 111 inois 60137 REGULATORY  
DDCKEI RLE COPY Enclosed  
DDCKEI RLE COPY Enclosed please find Reportable  
please find Reportable  
Occurrence  
Occurrence  
50-249/1977-7.  
50-249/1977-7.  
Line 38: Line 34:
to your office in accordance  
to your office in accordance  
with the bresden Nuc 1 ec;ir Power Station Techn i ca,1 Specif i cat..i ons,. Section 6. 6. B .. BBS: skm *Enclosure  
with the bresden Nuc 1 ec;ir Power Station Techn i ca,1 Specif i cat..i ons,. Section 6. 6. B .. BBS: skm *Enclosure  
cc: Director  
cc: Director of Inspection  
of Inspection  
& Enforcement  
& Enforcement  
Director  
Director of Management  
of Management  
& Program Control Fil e/NRC APR 2 5 1977   
& Program Control Fil e/NRC APR 2 5 1977   
LICENSEE  
LICENSEE EVENT REPORT CONTROL BLOCK: Lj_** 1 L . , I . I c&sE PRINT ALL,REQUIRED  
EVENT REPORT CONTROL BLOCK: Lj_** 1 L . , I . I c&sE PRINT ALL,REQUIRED  
INFORMATION)  
INFORMATION)  
LICENSEE  
LICENSEE NAME *@El I I I LI DI RI s I 31 1 0*s 14 REPORT CATEGORY TYPE. 6 LICENSE NUMBER  
NAME *@El I I I LI DI RI s I 31 1 0*s 14 REPORT CATEGORY  
TYPE. 6 LICENSE NUMBER  
15 25 REPORT SOURCE DOCKET NUMBER LICENSE . TYPE 41 1 p 11 11 I 26. . 3P EVENT DATE EVENT TYPE I o I 31 31 32 REPORT DATE @E]coN'.T  
15 25 REPORT SOURCE DOCKET NUMBER LICENSE . TYPE 41 1 p 11 11 I 26. . 3P EVENT DATE EVENT TYPE I o I 31 31 32 REPORT DATE @E]coN'.T  
I I I LJ L':J I 01 51  
I I I LJ L':J I 01 51  
12 14 19 I I o I 3 I 2 I .2 I 7 I 7 I 1014121117171 7 . 8 57. 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION  
12 14 19 I I o I 3 I 2 I .2 I 7 I 7 I 10141 2 1117171 7 . 8 57. 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION  
ffilfil.  
ffilfil. I During testing of the Unit-3 d)esel generator  
I During testing of the Unit-3 d)esel generator  
following  
following  
maintenance,  
maintenance, the engine 7 8 9 lol 3 r I started,.but*the  
the engine 7 8 9 lol3r I started,.but*the  
generator  
generator  
field failed to flash. The generator  
field failed to flash. The generator  
field flashed 7 . 8 9 lol41'1 during a secon.d start-up  
field flashed 7 . 8 9 lol41'1 during a secon.d start-up of the diesel. The diesel was started a third time, 7 . 8**9 IPl51 J . and again the field did not flash. The Unit-3 diesel generator  
of the diesel. The diesel was started a third time, 7 . 8**9 IPl51 J . and again the field did not flash. The Unit-3 diesel generator  
was then shut 7 0*s lolsl I , down and dee 1 a red i noperab 1 e. A subsequent  
was then shut 7 0*s lolsl I , down and dee 1 a red i noperab 1 e. A subsequent  
attempt to start the Unit-2/3  
attempt to start the Unit-2/3 diesel 1 *0 s .SYSTEM CAUSE PRIME  
diesel 1 *0 s .SYSTEM CAUSE PRIME  
i nued) * COMPONENT  
i nued) * COMPONENT  
CoMPONENT  
CoMPONENT  
CODE . CODE COMPONENT  
CODE . CODE COMPONENT  
CODE SUPPUER MANUFACTURER  
CODE SUPPUER MANUFACTURER  
VDLATION  
VDLATION [&sect;E] IE IE I* w I El NI GI II NI El I WI 019 17 I * l!U 7 8 9 10 11 12 . : .* .*. 17 43 44 47 48 CAUSE DESCRIPTION . < I The failure was 'caused by an intermittent  
[&sect;E] IE IE I* w I El NI GI II NI El I WI 019 17 I * l!U 7 8 9 10 11 12 . : .* .*. 17 43 44 47 48 CAUSE DESCRIPTION  
. < I The failure was 'caused by an intermittent  
capacitor  
capacitor  
short in the generator  
short in the generator  
field 7 8 9 flashing  
field 7 8 9 flashing circuitry.  
circuitry.  
The defective  
The defective  
capaci_tor'  
capaci_tor'  
was replaced,  
was replaced, and the Unit-3 diesel 1* 0* 9 IT1&sect;J I generator  
and the Unit-3 diesel 1* 0* 9 IT1&sect;J I generator  
was satisfact_orily  
was satisfact_orily  
tested and returned  
tested and returned to service. 7 8 9 FACIUTY STATUS Em L:J 7.; 8 .9 FORM OF ACTIVITY 'll. POWER I 01 913 10 CONTENT I 12 13 OTHER STATUS NA {continued)  
to service. 7 8 9 FACIUTY STATUS Em L:J 7.; 8 .9 FORM OF ACTIVITY  
'll. POWER I 01 913 10 CONTENT I 12 13 OTHER STATUS NA {continued)  
DISCOVERY  
DISCOVERY  
DESCRIPTION  
DESCRIPTION  
I 80 I 80 I 80 I 80 I 80 k 80 l eo I 80 80 rn RELEASED  
I 80 I 80 I 80 I 80 I 80 k 80 l eo I 80 80 rn RELEASED OF RELEASE AMOUNT OF ACTIVITY w LlJ : I . NA 11 LOCATION OF RELEASE .__------'---------.....JI  
OF RELEASE AMOUNT OF ACTIVITY  
w LlJ : I . NA 11 LOCATION  
OF RELEASE .__------'---------.....JI  
., 80 7 8 9 10 PERSONNEL  
., 80 7 8 9 10 PERSONNEL  
EXPOSURES  
EXPOSURES . NUMBER TYPE. * DESCRIPTION  
. NUMBER TYPE. * DESCRIPTION  
II&sect;] J 0 I 0 I 0 I .. .__ __ NA __________  
II&sect;] J 0 I 0 I 0 I .. .__ __ NA __________  
_;. ___ _;.__;. ______ __, 7 8 9 . 11* . 12 13 80 PERS'ONNEL  
_;. ___ _;.__;. ______ __, 7 8 9 . 11* . 12 13 80 PERS'ONNEL  
INJURIES  
INJURIES . NUMBER 'DESCRIPTION  
. NUMBER 'DESCRIPTION  
l1E1 I 0 I 0 I 0 I ':--__ N_A ___________  
l1E1 I 0 I 0 I 0 I ':--__ N_A ___________  
__ ""'=" 7 8 9* 11 12 80 * * OFFSITE .. CONSEQUENCES NA 7 8 9 LOSS OR DAMAGE . TO FACILITY  
__ ""'=" 7 8 9* 11 12 80 * * OFFSITE .. CONSEQUENCES NA 7 8 9 LOSS OR DAMAGE . TO FACILITY TYPE [!El DESCRIPTION  
TYPE [!El DESCRIPTION  
NA 7 8 9 10 PUBLICITY  
NA 7 8 9 10 PUBLICITY  
NA ADDITIONAL  
NA ADDITIONAL  
Line 107: Line 82:
PHONE:_.-...  
PHONE:_.-...  
_ _.._ __ _...;_ GPO 881*087   
_ _.._ __ _...;_ GPO 881*087   
-. * EVENT DESCR1PTION  
-. * EVENT DESCR1PTION (continued) -generator  
(continued)  
was-;:::unsuccessful (R. 0. report no.  
-generator  
This event was of little safety significance, since the redundant  
was-;:::unsuccessful  
Unit-2/3 di ese 1 .generator  
(R. 0. report no.  
This event was of little safety significance,  
since the redundant  
Unit-2/3  
di ese 1 .generator  
was demonstrated  
was demonstrated  
to be operab 1 e short 1 y thereafter  
to be operab 1 e short 1 y thereafter (within minutes), and off-site power remained available  
(within minutes),  
and off-site  
power remained  
available  
this interval.  
this interval.  
ihe -Unit-2 diesel generator  
ihe -Unit-2 diesel generator  
experienced  
experienced  
a similar  
a similar  
field flashing  
field flashing failure in April, 1975. (50-249/1977-7)  
failure in April, 1975. (50-249/1977-7)  
CAUSE DESCRIPTION (continued)  
CAUSE DESCRIPTION  
(continued)  
As a long-term  
As a long-term  
action, the  
action, the  
Line 139: Line 103:
capacitors.  
capacitors.  
The failed capacitot  
The failed capacitot  
is an 8-microfarad,  
is an 8-microfarad, 150-volt electrolytic  
150-volt  
electrolytic  
unit manufactured  
unit manufactured  
by Aerovox:  
by Aerovox: ; *--l : *4: -* ...... : ., ' ... , -. -... ,'J.,J ::::1
; *--l : *4: -* ...... : ., ' ... , -. -... ,'J.,J ::::1
}}
}}

Revision as of 15:39, 7 July 2018

Dresden, Units 2 and 3, Transmittal of Reportable Occurrence Report No. 50-249/1977-7
ML17252A272
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 04/20/1977
From: Stephenson B B
Commonwealth Edison Co
To: Keppler J G
NRC/RGN-III
References
50-249/1977-7
Download: ML17252A272 (3)
v • d • e


See also: IR 05000249/2019077

Text

Commonwec9

Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone

815/942-2920

BBS Ltr. # 333 April 20, Mr. James G. Keppler, Regional

Directorate

of Regulatory

Operation

-Region I I I U. s: "Nuclear Regulatory

Commission

799 Roosevelt

Road Glen Ellyn, 111 inois 60137 REGULATORY

DDCKEI RLE COPY Enclosed please find Reportable

Occurrence

50-249/1977-7.

This report is being submitted

to your office in accordance

with the bresden Nuc 1 ec;ir Power Station Techn i ca,1 Specif i cat..i ons,. Section 6. 6. B .. BBS: skm *Enclosure

cc: Director of Inspection

& Enforcement

Director of Management

& Program Control Fil e/NRC APR 2 5 1977

LICENSEE EVENT REPORT CONTROL BLOCK: Lj_** 1 L . , I . I c&sE PRINT ALL,REQUIRED

INFORMATION)

LICENSEE NAME *@El I I I LI DI RI s I 31 1 0*s 14 REPORT CATEGORY TYPE. 6 LICENSE NUMBER

15 25 REPORT SOURCE DOCKET NUMBER LICENSE . TYPE 41 1 p 11 11 I 26. . 3P EVENT DATE EVENT TYPE I o I 31 31 32 REPORT DATE @E]coN'.T

I I I LJ L':J I 01 51

12 14 19 I I o I 3 I 2 I .2 I 7 I 7 I 10141 2 1117171 7 . 8 57. 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTION

ffilfil. I During testing of the Unit-3 d)esel generator

following

maintenance, the engine 7 8 9 lol 3 r I started,.but*the

generator

field failed to flash. The generator

field flashed 7 . 8 9 lol41'1 during a secon.d start-up of the diesel. The diesel was started a third time, 7 . 8**9 IPl51 J . and again the field did not flash. The Unit-3 diesel generator

was then shut 7 0*s lolsl I , down and dee 1 a red i noperab 1 e. A subsequent

attempt to start the Unit-2/3 diesel 1 *0 s .SYSTEM CAUSE PRIME

i nued) * COMPONENT

CoMPONENT

CODE . CODE COMPONENT

CODE SUPPUER MANUFACTURER

VDLATION [§E] IE IE I* w I El NI GI II NI El I WI 019 17 I * l!U 7 8 9 10 11 12 . : .* .*. 17 43 44 47 48 CAUSE DESCRIPTION . < I The failure was 'caused by an intermittent

capacitor

short in the generator

field 7 8 9 flashing circuitry.

The defective

capaci_tor'

was replaced, and the Unit-3 diesel 1* 0* 9 IT1§J I generator

was satisfact_orily

tested and returned to service. 7 8 9 FACIUTY STATUS Em L:J 7.; 8 .9 FORM OF ACTIVITY 'll. POWER I 01 913 10 CONTENT I 12 13 OTHER STATUS NA {continued)

DISCOVERY

DESCRIPTION

I 80 I 80 I 80 I 80 I 80 k 80 l eo I 80 80 rn RELEASED OF RELEASE AMOUNT OF ACTIVITY w LlJ : I . NA 11 LOCATION OF RELEASE .__------'---------.....JI

., 80 7 8 9 10 PERSONNEL

EXPOSURES . NUMBER TYPE. * DESCRIPTION

II§] J 0 I 0 I 0 I .. .__ __ NA __________

_;. ___ _;.__;. ______ __, 7 8 9 . 11* . 12 13 80 PERS'ONNEL

INJURIES . NUMBER 'DESCRIPTION

l1E1 I 0 I 0 I 0 I ':--__ N_A ___________

__ ""'=" 7 8 9* 11 12 80 * * OFFSITE .. CONSEQUENCES NA 7 8 9 LOSS OR DAMAGE . TO FACILITY TYPE [!El DESCRIPTION

NA 7 8 9 10 PUBLICITY

NA ADDITIONAL

FACTORS *Elfil I NA . 7 8 9 80 80 80

7 B. 9 &O J. B. Martin Ext. 265

....... -----------------------

PHONE:_.-...

_ _.._ __ _...;_ GPO 881*087

-. * EVENT DESCR1PTION (continued) -generator

was-;:::unsuccessful (R. 0. report no.

This event was of little safety significance, since the redundant

Unit-2/3 di ese 1 .generator

was demonstrated

to be operab 1 e short 1 y thereafter (within minutes), and off-site power remained available

this interval.

ihe -Unit-2 diesel generator

experienced

a similar

field flashing failure in April, 1975. (50-249/1977-7)

CAUSE DESCRIPTION (continued)

As a long-term

action, the

diesel generator

maintenance

procedure

will be revised to include a check of the generator

field flashing

capacitors.

The failed capacitot

is an 8-microfarad, 150-volt electrolytic

unit manufactured

by Aerovox: ; *--l : *4: -* ...... : ., ' ... , -. -... ,'J.,J ::::1

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