ML20028E307
| ML20028E307 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, 05000000 |
| Issue date: | 01/13/1983 |
| From: | Rausch T COMMONWEALTH EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| REF-SSINS-6820 5791N, IEB-79-14, NUDOCS 8301210201 | |
| Download: ML20028E307 (3) | |
Text
/ N Commonwealth Edison
/ = ) ona First NitionIl Plata. Chicago. Illinois
\ T- Address Reply to: Post Office Box 767
\ Chicago, Illinois 60690 January 13, 1983 Mr. James G. Keppler, Regional Administrator Directorate of Inspection and Enforcement - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137
Subject:
Dresden Station Units 2 and 3 Quad Cities Station Units 1 and 2 Status of Installation of I.E.Bulletin 79-14 Safe Shutdown Path Supports NRC Docket Nos. 50-237, 50-249, 50-254, and 50-265 Reference (a): J. G. Keppler letter to Cordell Reed dated July 14, 1982 (Confirmation of Action Letter).
Dear Mr. Keppler:
Attached is a status report as of January 12, 1983 for the design and installation of I.E.Bulletin 79-14 safe shutdown system piping supports at Dresden Units 2 and 3 and Quad Cities Units 1 and
- 2. In order to meet the February 15, 1983 date specified in item 1 of the referenced Confirmation of Action Letter (CAL), we will have to install 140 pipe supports at Dresden and 133 supports at Quad Cities.
We have continually been assessing our ability to meet the February 15, 1983 date, and until mid December, 1982, we had confidence that the date was achievable. At that time, Dresden and Quad Cities experienced two I.E.Bulletin 79-14 work stoppages because of certain problems identified by our Quality Assurance department with the Elcen Metal Products Company Quality Assurance program. These Quality Assurance problems have recently been resolved, but the work stoppages have affected our hanger installation progress.
Nevertheless, at this time the February 15, 1983 completion date appears to be achievable at Dresden Station. Dresden Unit 2 will be in an outage from January until April, 1983. The station will work two ten hour shifts per day until the end of the outage, and will concentrate their efforts to complete the installation of supports for Unit 3 by the required date and then complete the installation of safe shutdown path hangers for Unit 2 before the end of the outage in April.
bO$?o$o0bh]7 PDR M 14 1983 gj
o' .
J. G. Keppler January 13, 1983 There is more concern with Quad Cities. Because both Quad Cities units are operating, there is a large number of hangers to be installed on both units before the February 15, 1983 date. Personnel involved in the hanger installation have been put on a ten hour work day to expedite installation.
For your information, by December 1, 1982 all the design drawings from NUTECH and EDS had been issued for construction for the safe shutdown piping systems. The average installation rate for each station has been about 65 hangers per month. Quad Cities Unit 1 has been in an outage from September through December. During the outage, the installation of all control Rod Drive Insert / Withdrawal hangers inside and outside the drywell was completed, structural steel inside and outside the drywell was modified, major modification work was performed on the Mark 1 torus attached small bore piping, and 76 new and modified hangers were installed on the SRV discharge lines. As can be seen, major efforts have been instituted to work on 79-14 hangers as well as complete other major outage work.
At present, completion by the CAL date at all four units appears achievable, but with no margin for any unforseen problems.
As we had expressed in the July 14, 1982 meeting, completing the safe shutdown paths by February 15, 1983 would require an enormous and costly effort. We believe we have made such an effort and will notify you again by February 1, 1983 of our progress.
Please address any questions you may have concerning this matter to this office.
Very truly yours, h fh u Z Thomas J. Rausch Nuclear Licensing Administrator 1m l
1 Attachment i
cc: Region III Inspector - Dresden Region III Inspector - Quad Cities i
5791N
.-. . _ . _ . _ _ . . __ . ._._,__1_ .-m - __. _ ._. _ _ _ . - . , _ .. _
W v I.E. BULLETIN 79 SAFE SHUTDOWN SYSTEM HANGERS t, Support Dwg.. Status Installation Status
'Date: 12-31-82 Date: 1-12-83 Hangers i Total Issued Completed Left To
]
Station Co. Number To Date In Place This Month Install Dresden ,
EDS 311 311 249 6 62 Nutech 86' 86 8 3 78 Total 397 397 257 9 140~
J l
Quad Cities EDS 354 354 268 19 86 Nutech 57 57 10 10 47 a
l Total 411 411 278 29 133 4 Unit Grand Total 808 808 535 38 273 I
i 1
I i
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