W3P89-1401, Forwards Compliance w/10CFR50.62 Reduction of Risk from ATWS Events, as Result of Continuing Discussion & 881220 Request for Addl Info Based on New Designs
| ML20246P239 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 07/17/1989 |
| From: | Burski R LOUISIANA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20246P244 | List: |
| References | |
| W3P89-1401, NUDOCS 8907200136 | |
| Download: ML20246P239 (2) | |
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LO UISI AN A / 317 BARONNJ STREET
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P. O. BOX 60340 (504)595 3100 POWER & LIGHT NEW ORLEANS, LOUISIANA 70160
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W3P89-1401 A4.05 QA July 17, 1989 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C.
20555
SUBJECT:
Waterford SES Unit No. 3 Docket No. 50-382 Compliance with 10CFR50.62 Reduction of Risk From Anticipated Transients Without Scram (ATWS) Events
REFERENCE:
- 1) W3P88-1916, dated October 7, 1988
- 2) W3P89-0153, dated February 3,1989
- 3) W3P89-0195, dated March 1, 1989 Gentlemen:'
As a. result of continuing discussions with the NRC on the ATWS requirement for a Diverse Emergency Feedwater Actuation System (DEFAS) and its pending implementation at Waterford 3, the Waterford 3 Diverse Scram System (DSS) design has been affected, rendering the design information previously sub-mitted in References 1, 2 and 3 inapplicable. Therefore, the attached re-port was prepared to provide a description of a revised functional design of a DSS, which is referred to as a Diverse Reactor Trip System (DRTS) in the report, based on implementation of a DEFAS and to provide a proposed functional design of a DEFAS for Waterford 3.
The report also provides responses to the December 20, 1988 Request for Additional Information based on the new designs.
We recognize that the July 12, 1989 meeting between the NRC and the Combustion Engineering Owners Group addressed several outstanding issues associated with DEFAS design. It may be wortnwhile to provide supplemental information to this report following publication of the NRC meeting summary O((
8907200136 890717 PD3 ADOCK 050003S2 P
PDC "AN EGU.AL OPPORTUNITY EMPLOYER" 7j J
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W3P89-1401 Page 2 Should you require any additional information, please contact Roy Prados at -
(504) 595-2806.
Yours very.truly, t
l:
R.F. Burski Manager l
Nuclear Safety & Regulatory Affairs l
RFB/RWP/dc cc: Messrs. E.L. Blake W.M.'Stevenson F.J. Hebdon
'D.L.-Wigginton R.D. Martin NRC Resident Inspector's Office (W3)-
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