ML20094M477
| ML20094M477 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/23/1992 |
| From: | William Cahill, John Marshall TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20094M479 | List: |
| References | |
| TXX-92009, NUDOCS 9204010006 | |
| Download: ML20094M477 (2) | |
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Ref. # 10CFR2.790 TUEi EC TRIC NRc6 88 08
llliam J. Cahill, jf.
UOMh 23, 1992 Grvup VicePrni.M t U. S. Nuclear Regulatory Commission Atto: Document Eontrol Dest Wushingcon, D. E 20555
SUBJECT:
COMANEHE PEAV STEAM ELECTRIC STATION (CPSES) - UNIT 1 DOCKE1 NO. 50-445 SUPPLrMEllTAL EVALUAT10ft 0F RESIDUAL HEAT REMOVAL (RHR)
LitlES THERMAL STRATIFICAT10:1 AND LEAK-BEFORE-BREAK (LBB)
GUsLirICAT10ti REF:
- 2) I'U El ect r ic l et t er logqed TXX-89566, from William J. Cahill, Jr. to NRC Jated August 9, 1989
- 3) TV Electric letter logged TXX-89710, from William J. Cahill, Jr. tu NRC dated September 18, 1989 Gentlemen:
On May 9,1989. TU Elect ric submitt ed by Refercnce (1) en evaluation of potential thermal stratification effects and leak before-break qualification for the Comanche Peak Unit 1 RHR piping.
TU Electric subse.juently submitted a supplemental evaluation by Ref erence (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 providea an overview of the RHR monitoring program and administratice controls that ensure issues arising from the monitorir,g program are addressed in a timely manner Reference (3) provides a response to concerns pertaining to the timeliness of reporting kHR thermal cycling; sensitivity of monitoring equipment, and the type cf welding performed at LBB evaluated critical crack locations discussed durina a telephone conf erence on Septemtier 6, 1 :M 9.
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The RHR line has been monitored and data has been collected during the first operating cycle. Westinghouse has evaluated the data and concluded that further data collection is not necessary. The evaluation Dy Westinghouse is included in the enclosure.
Therefore, we request that the continuetion of data collection be suspended.
Sincerely, William J. Cahill. Jr.
By:
/
J. S. Marshall Generic - Licensing Manager CEJ/vid Enclosure c - Mr. T. A. Bergman. NRR Mr, R. D. Martin, Region IV Resident Inspectors, CPSES (2)
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