ML20245G761
| ML20245G761 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 06/23/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-86-04, CP-86-4, TXX-89193, NUDOCS 8906290252 | |
| Download: ML20245G761 (2) | |
Text
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i ummer MM Log # TXX-89193 C'
File # 10110 C
C 903.8
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Ref. #-10CFR50.55(e) nlELECTRIC June 23, 1989 William J. Cahill. Jr.
Executive Vice President '
O. S. Nuclear Regulatory Commission
-Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445'AND 50-446 PROXIMITY PLACEMENT - RICHMOND INSERTS TO EMBEDDED PLATES AND WELDED ATTACHMENTS TO EMBEDDED PLATES AND ALL CONCRETE ATTACHMENTS SDAR:
CP-86-04 (SUPPLEMENTAL REPORT)
REF:
- 1) SDAR CP-79-08, " Installation of Drilled-In Expansion Joints"
- 2) SDAR CP-85-18. " Embedded Angles"
- 3) SDAR CP-86-44, " Welded Attachments to Embedded Strip Plates"
- 4) SDAR CP-86-59, " Support Installations - Spacing Violations" I
Gentlemen:
On February 5, 1988, TU Electric submitted a final report logged TXX-88185 l
addressing violations of the spacing requirements for concrete embedments.
l' The purpose of.this supplemental report is to revise statements made in TXX-88185 regarding the corrective action for the above referenced SDAR's.
As stated in TXX-88185, the Unit I corrective actions for this issue were 1mplemented in two phases.
In Phase I, improved control of in-process and l
future concrete attachments was established through revision of Specification l
2323-SS-30, and the revision or generation of implementation procedures.
The list of specific procedure numbers referred to in TXX-88185 is no longer correct. The procedures required to complete Phase I are available for NRC-review at CPSES.
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l' As stated in TXX-88185, Phase II corrective actions involved:
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- 1) A 100 percent field engineering walkdown of concrete attachment j
installations in accordance with CPE-SWEC-FVM-EE/ME/IC/CS-90.
- 2) Verification and evaluation of existing concrete attachment violations per Procedure ECE-9.04-05 " Post Construction Hardware Validation Program
- Engineering Evaluations," with the analysis performed in accordance with DBD-CS-015.
I e906290252 890623 1
PDR ADOCK 05000445 II-3 S
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400 krth Olive Street LB B1 Dallas, Texas 75201
TXX-89193 June 23, 1989 Page 2 of 2 L
- 3) The inspection of any rework resulting from the analysis will be l
performed using spacing requirements of Specification 2323-55-30 Revision 3.
The following corrective actions were performed in lieu of items 1 and 2 above:
- 1) A field engineering walkdown of a sample of concrete embedments was performed using Field Verification Method CPE-SWEC-FVM-CS-075 and procedure ECC-10.31 (instead of CPE-SWEC-FVM-EE/ME/IC/CS-90).
Engineering evaluations were prepared to provide the justification for accepting all of the embedments based on a field engineering walkdown of less than 100 percent of the embedmsits.
- 2) Verification and evaluation of existing concrete attachment violations were accomplished per Procedure EC-9.04, " Control of the Post l
Construction Hardware Validation Program Manual," and ECE-9.04-05 " Post
. Construction Hardware Validation Program - Engineering Evaluations," with the analysis performed in accordance with DBD-CS-015.
Additionally, as a result of the implementation of the revised item 2 activities, spacing violations were documented on nonconformance reports and dispositioned use-as-is. Therefore the rework discussed in TXX-88185 (item 3 above) is no longer applicable.
The Unit I corrective actions required to resolve SDARs CP-86-04, CP-79-08.
CP-86-44, CP-86-59, and CP-85-18 are complete. The Unit 2 corrective actions will be completed prior to Unit 2 fuel load.
l.
Sincerely.
William J. Cahill, Jr.
I CBC/ddm j
c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) l l
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