ML17252B138

Letter Regarding Response to the Item Noted Under Enforcement Action in Inspection Report 05000249/1976020 - Dresden Unit 3

ML17252B138
Person / Time
Site:	Dresden
Issue date:	11/08/1976
From:	Bolger R L Commonwealth Edison Co
To:	Keppler J G NRC/RGN-III
References
IR 1976020
Download: ML17252B138 (2)

See also: IR 05000249/1976020

Text

.} '. ... ,,_ . :\ 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 November 8, 1976 Su1.:>j0ct:

Dresde.n Station Unit 3 Dear Mr. Keppler: Response to IE.Inspection

Report No. 50-249/76-20

NRC *Docket No. SO-i49 Attached is Commonwealth

Edison's response to the item noted under Enforcement

Action in the subject

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, f/001-;/ R. L. . Assistant

Vice President

Attachment

NOV 10 i976 \

Commonwealth

Edison Company

Dkt.

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".

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