ML17252B138: Difference between revisions

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| issue date = 11/08/1976
| issue date = 11/08/1976
| title = Letter Regarding Response to the Item Noted Under Enforcement Action in Inspection Report 05000249/1976020 - Dresden Unit 3
| title = Letter Regarding Response to the Item Noted Under Enforcement Action in Inspection Report 05000249/1976020 - Dresden Unit 3
| author name = Bolger R L
| author name = Bolger R
| author affiliation = Commonwealth Edison Co
| author affiliation = Commonwealth Edison Co
| addressee name = Keppler J G
| addressee name = Keppler J
| addressee affiliation = NRC/RGN-III
| addressee affiliation = NRC/RGN-III
| docket = 05000249
| docket = 05000249
Line 14: Line 14:
| page count = 2
| page count = 2
}}
}}
See also: [[followed by::IR 05000249/1976020]]


=Text=
=Text=
{{#Wiki_filter:.} '. ... ,,_ . :\ Mr. James G. Keppler, Director Directorate  
{{#Wiki_filter:\
*of Inspection  
    .}
and Enforcement  
    ...,,_ .'.:\
-Region III U.S. F!uclear Regulatory  
November 8, 1976 Mr. James G. Keppler, Director Directorate *of Inspection and Enforcement - Region III U.S. F!uclear Regulatory Conunission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Su1.:>j0ct: Dresde.n Station Unit 3 Response to IE.Inspection Report No. 50-249/76-20 NRC *Docket No. SO-i49
Conunission  
 
799 Roosevelt  
==Dear Mr. Keppler:==
Road Glen Ellyn, Illinois 60137 November 8, 1976 Su1.:>j0ct:  
 
Dresde.n Station Unit 3 Dear Mr. Keppler: Response to IE.Inspection  
Attached is Commonwealth Edison's response to the item noted under Enforcement Action in the subject inspect~on report.
Report No. 50-249/76-20  
Neither this response nor the subject inspection report contain proprietary information.
NRC *Docket No. SO-i49 Attached is Commonwealth  
Please address any questions on the *matter to this office.
Edison's response to the item noted under Enforcement  
Very truly yours, U,~:?&u f/001-;/
Action in the subject  
R. L. Bol~er Assistant Vice President Attachment NOV 10 i976
report. Neither this response nor the subject inspection  
 
report contain proprietary  
Commonwealth Edison Company           NJ.~C Dkt. 50-2L~.9 Attc:oi_chment Infraction:
information.  
Failu:ce to verify fuel grapple "Hoist Loaded" light .
Please address any questions  
. Discussion:
on the *matter to this office. Very truly yours,  
Dm:ing unloading the fuel from the Dresden Unit 3 reactor, Procedure DFP 800-10 step F.l.h was not followed completely. Step F.l.h reads as follows:
U, f/001-;/ R. L. . Assistant  
                  "Slov1ly raise the grapple, using the grapple lever and the load fl9at switch, and verify that the fuel assembly is moving up as follov1s:
Vice President  
: 1) The *slack cable indicator light should go out.
Attachment  
                    . 2) The hoist loaded indicator ligb.ts".
NOV 10 i976 \ 
l During this particular operation, the **Hoist Loaded" indicator "1:1as l
Commonwealth  
not l~_ghting during the .t"irst few feet of lifting the f~el from the reactor core. The load cell had been checked using the 400 pound grapple test weight in accordance with sfirveillance Procedure DOS 800-1 steps j-1. The internal grapple. friction loads are apparently changed slightly under Qp~rating conditions different from DOS 800-1.
Edison Company  
If inrproper hoist loaded light operation is observed under certain operating conditions different than DOS 800-1 condifions, it will be necessary to reset the load cell for the actual conditions to obtain proper operation.
Dkt.  
Corrective Action:
Attc:oi_chment  
The fuel grapple load cell was reset to actuate the hoist loacl.ed light lifting a fuel assembly in the reactor core.
Infraction:  
Corrective Action to Prevent Recurrence:
Failu:ce to verify fuel grapple "Hoist Loaded" light . . Discussion:  
Procedure DI"P 800-7 "Fuel Handling' Inside the F.eactor" step F.*1.1, DFP 800-8 ''Control Rod Blade Guide Movements Between and in the Spent .Fuel Storage Pool and the Reactor" step F.6.j, and DFP 800-10 "Fuel Eovements from the Reactor to the Storage Pool" step F.l.h i;vill be revised.         These revisions 'dill allO\*J verification that the :Cuel assembly is moving up as the grapple is raised by visual observation of the :fuel assembly or by ob-servation of the. hoist loaded light. An e~~planatory note will be added to these 9rocedure steps to point out the relationship of the hoist loaded light sensitivity to grapple position.               These procedures will be. revised prior to next refueling activities on Dresden Units 2 or 3.}}
Dm:ing unloading  
the fuel from the Dresden Unit 3 reactor, Procedure  
DFP 800-10 step F.l.h was not followed completely.  
Step F.l.h reads as follows: "Slov1ly raise the grapple, using the grapple lever and the load fl9at switch, and verify that the fuel assembly is moving up as follov1s:  
1) The *slack cable indicator  
light should go out. . 2) The hoist loaded indicator  
ligb.ts".  
During this particular  
operation, the **Hoist Loaded" indicator  
"1:1as not  
during the .t"irst few feet of lifting the  
from the reactor core. The load cell had been checked using the 400 pound grapple test weight in accordance  
with sfirveillance  
Procedure  
DOS 800-1 steps j-1. The internal grapple. friction loads are apparently  
changed slightly under  
conditions  
different  
from DOS 800-1. If inrproper  
hoist loaded light operation  
is observed under certain operating  
conditions  
different  
than DOS 800-1 condifions, it will be necessary  
to reset the load cell for the actual conditions  
to obtain proper operation.  
Corrective  
Action: .. The fuel grapple load cell was reset to actuate the hoist loacl.ed light lifting a fuel assembly in the reactor core. Corrective  
Action to Prevent Recurrence:  
Procedure  
DI"P 800-7 "Fuel Handling'  
Inside the F.eactor" step F.*1.1, DFP 800-8 ''Control  
Rod Blade Guide Movements  
Between and in the Spent .Fuel Storage Pool and the Reactor" step F.6.j, and DFP 800-10 "Fuel Eovements  
from the Reactor to the Storage Pool" step F.l.h i;vill be revised. These revisions  
'dill allO\*J verification  
that the :Cuel assembly is moving up as the grapple is raised by visual observation  
of the :fuel assembly or by servation  
of the. hoist loaded light. An  
note will be added to these 9rocedure  
steps to point out the relationship  
of the hoist loaded light sensitivity  
to grapple position.  
These procedures  
will be. revised prior to next refueling  
activities  
on Dresden Units 2 or 3. l l
}}

Latest revision as of 10:52, 4 February 2020

Letter Regarding Response to the Item Noted Under Enforcement Action in Inspection Report 05000249/1976020 - Dresden Unit 3
ML17252B138
Person / Time
Site: Dresden Constellation icon.png
Issue date: 11/08/1976
From: Bolger R
Commonwealth Edison Co
To: James Keppler
NRC/RGN-III
References
IR 1976020
Download: ML17252B138 (2)
v • d • e


Text

\

.}

...,,_ .'.:\

November 8, 1976 Mr. James G. Keppler, Director Directorate *of Inspection and Enforcement - Region III U.S. F!uclear Regulatory Conunission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Su1.:>j0ct: Dresde.n Station Unit 3 Response to IE.Inspection Report No. 50-249/76-20 NRC *Docket No. SO-i49

Dear Mr. Keppler:

Attached is Commonwealth Edison's response to the item noted under Enforcement Action in the subject inspect~on report.

Neither this response nor the subject inspection report contain proprietary information.

Please address any questions on the *matter to this office.

Very truly yours, U,~:?&u f/001-;/

R. L. Bol~er Assistant Vice President Attachment NOV 10 i976

Commonwealth Edison Company NJ.~C Dkt. 50-2L~.9 Attc:oi_chment Infraction:

Failu:ce to verify fuel grapple "Hoist Loaded" light .

. Discussion:

Dm:ing unloading the fuel from the Dresden Unit 3 reactor, Procedure DFP 800-10 step F.l.h was not followed completely. Step F.l.h reads as follows:

"Slov1ly raise the grapple, using the grapple lever and the load fl9at switch, and verify that the fuel assembly is moving up as follov1s:

1) The *slack cable indicator light should go out.

. 2) The hoist loaded indicator ligb.ts".

l During this particular operation, the **Hoist Loaded" indicator "1:1as l

not l~_ghting during the .t"irst few feet of lifting the f~el from the reactor core. The load cell had been checked using the 400 pound grapple test weight in accordance with sfirveillance Procedure DOS 800-1 steps j-1. The internal grapple. friction loads are apparently changed slightly under Qp~rating conditions different from DOS 800-1.

If inrproper hoist loaded light operation is observed under certain operating conditions different than DOS 800-1 condifions, it will be necessary to reset the load cell for the actual conditions to obtain proper operation.

Corrective Action:

The fuel grapple load cell was reset to actuate the hoist loacl.ed light lifting a fuel assembly in the reactor core.

Corrective Action to Prevent Recurrence:

Procedure DI"P 800-7 "Fuel Handling' Inside the F.eactor" step F.*1.1, DFP 800-8 Control Rod Blade Guide Movements Between and in the Spent .Fuel Storage Pool and the Reactor" step F.6.j, and DFP 800-10 "Fuel Eovements from the Reactor to the Storage Pool" step F.l.h i;vill be revised. These revisions 'dill allO\*J verification that the :Cuel assembly is moving up as the grapple is raised by visual observation of the :fuel assembly or by ob-servation of the. hoist loaded light. An e~~planatory note will be added to these 9rocedure steps to point out the relationship of the hoist loaded light sensitivity to grapple position. These procedures will be. revised prior to next refueling activities on Dresden Units 2 or 3.

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