ML20247N486
| ML20247N486 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/18/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19307A374 | List: |
| References | |
| TXX-89710, NUDOCS 8909260227 | |
| Download: ML20247N486 (1) | |
Text
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mMM Log # TXX-89710 F9 File # 903.6
[3-f33 10005(clo)
Ref. # 10CFR2.790 1UELECTRIC September 18, 1989 WWism J. Cahm, Jr.
Enecwive Via President U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
CDMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 SUPPLEMENTAL EVALUATION OF RESIDUAL HEAT REMOVAL (RHR) LINES THERMAL STRATIFICATION AND LEAK-BEFORE-BREAK (LBB) QUALIFICATION REF:
to the NRC dated May 9, 1989
to the NRC dated August 9, 1989 Gentlemen:
On May 9,1989, TU Electric submitted by reference (1) an evaluation of potential thermal stratification effects and leak-before-break qualification for the Comanche Peak Unit 1 RHR piping. TV Electric subsequently submitted a supplemental evaluation by reference (2), to address NRC concerns, which demonstrated that RHR piping integrity will be maintained during plant operation and that the leak-before-break criteria are satisfied. Reference (2) also provided an overview of the RHR monitoring program and administrative controls that ensure issues arising from the monitoring program are addressed in a timely manner.
In a telephone conference on September 6,1989, representatives of the NRC, TV Electric and Westinghouse discussed concerns pertaining to the timeliness of reporting RHR thermal cycling; the sensitivity of monitoring equipment and the type of welding performed at LBB evaluated critical crack locations.
The attachment provides the requirea information to address and resolve those concerns.
Sincerely,
/a w William J. Cahill, Jr.
HAM /smp Attachment AFoi c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) t j[2fp& (lQ4g monh otsu sunt LB B1 Daun Mas 73201 A
PNV
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