ML17193B429
| ML17193B429 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/04/1981 |
| From: | Abel J COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML17193B409 | List: |
| References | |
| NUDOCS 8106010593 | |
| Download: ML17193B429 (2) | |
Text
Commonwealth Edison One First National Plaza. Chicago. Illinois Address Reply to: Post Office Box 767 Chicago, Illinois 60690 Mr. James G. Keppler, Director Directorate of Inspection and Enforcement - Region Ill U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn~ IL 60137 May 4, 1981
Subject:
Dresden Station Units 1, 2, and 3 Response to IE lnsp~ctfon Report Nos.
50-10/81-04, 50-237/81-08, and 50~249/81-05 NRC Docket Nos. 50-10/237/249 Reference (a):
J. Hind letter to C. Reed dated April 10, 1981.
Dear Mr. Keppler:
On March 25, 1981, Messrs. W. Axelson, J. Patterson, and M.
Phillips conducted an inspection of Dresden Station's post-acciaent primary coolant sampling procedure.
Reference (a.) discussed several concerns with the procedures which they identified.
The first two areas identified as needing improvement involved the lead caves and carts used for transporting the sample.
First, concern was expressed about the caves being able to move on the transporting carts if a sudden jerk or bump was encountered.
Secondly, it was noted that it was possible for the lead brick lid on the cave to become separated from its handles if it was jolted or turned upside down.
Both of these potential difficulties have been rectified by redesigning the cave and lid.
The new lead brick cave will be braced on the cart to prevent movement, and its lead brick lia will have handles running through the brick, making it impossible for the brick and handles to become separated.
The new lid and the bracing will be available by May 29, 1981.
The inspectors were also concerned about our sampling procedures in case the elevator was inoperable.
A suitable
- back-up" portable lead pot has been located in our calibration facility, which could be carriea up and down the stairs, and tr a i n i n g on the use* of th i s back - up pot w i 11 be. i n c 1 u de d i n the supplemental training to be. given to the technicians as a result of the changes described herein.
2 -
Finally, the inspectors found the existing vial:and stopper to be unsatisfactory for the manner in which they were being usea.
To correct this situation, a new sample vial has been chosen.
This vial is a serum vial of approximately 25 milliliters in volume, has a wide mouth, and easily accepts a rubber stopper when using remote handling tools.
When using this vial, it is unnecessary to handle it by its stopper at any point in the procedure, in contrast to the vial we previou~ly used.
As an additional precaution, this vial is placed in a small, thin, lead container which goes into the main lead cave *. When transferring the sample, the small lead container can be removed and transferred with the sample vial inside, making it unnecessary to handle the vial itself.
This approach was suggested by the inspe~tors.
Upon the return of the modified caves from the shop, retraining on the revised... procedu.re, w.ill be. complete.d.in a timely.
manner as the Rao-Chem Technician schedule permits.
We believe these changes satisfy the concerns of the inspectors.
Please address any questions concerning this matter to this off ice.
cc:
RIII Inspector - Dresden 30378 Very truly yours, 1i n/ j
/J.~(
/
. Director of Nuclear Licensing