ML18108A607

Responds to 10/10/1973 Letter by Furnishing Information Regarding Anticipated Transients Without Scram

ML18108A607
Person / Time
Site:	Saint Lucie
Issue date:	12/31/1973
From:	Robert E. Uhrig Florida Power & Light Co
To:	Giambusso A US Atomic Energy Commission (AEC)
References
Download: ML18108A607 (3)

Text

AEC D~ TRIBUTIOH FOR. PART 50 DOCKET MA ~RIAL (TEMPORARY FORM) CONTROL NO:

FILE:

FROM: DATE OF DOC DATE REC'D LTR 1fEMO OTHER Florida Power 6 Light Company Miami, Fla. 33101 12-31-73 1-3-74 R. E.,Uhrig

.TO: ORIG CC OTHER SENT AEC PDR A. Giambusso 3 signed SENT LOCAL PDR CLASS UNCLASS PROP INFO INPUT NO C S REC'D DOCKET NO:

XXX 50-389 DESCRIPTXOH: ENCLOSURES:

Ltr re our 10-10-73 ltr, furnishing information regarding Anticipated Transients Without Scram for St. Lucie Unit 52 DO NOT REMOVE PLANT NAtfE: St. Lucie Unit 8'2 .

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FLORIDA POWER 8( LIGHT COMPANY December '31, 1973

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Mr. Angelo Giambusso, Deputy for Reactor Projects Directorate of I icensing Office of Regulation U. S. Atomic Energy Commission Washington, D. C. 20545

Dear Mr. Giambusso:

.yp 4 Re: St. Lucie Plant Unit No. 2 '.d'n Docket No. 50-389 response to your October 10, 1973 letter concerning the subject of Anticipated Transients Without Scram (ATWS), the approach that we intend to follow for St. Lucie Plant Unit. No. 2 (Docket No. 50-389) is AEC Staff Position IB specified in Appendix A. Wash 1270, UC-78 of September 1973 titled "Technic~e@rt on Anticipated Transients Without Scram for Water-Cooled Power Reactors." Implementation to make ATWS consequences acceptable will be i+accordance with the guidelines and schedule of Section IIB of Appendix A.

In support of meeting these requirements the reactor vendor, Combustion Engineering, has advised that they plan'". to complete the development of the ATWS evaluation model, applicable to all CE reactor plants, on a timely basis with frequent meetings with the AEC staff to generate a model acceptable to the AEC. Once the ATWS analysis model is approved by the AEC, it will be applied to the Unit No. 2 plant to determine if specific "design changes are needed to make the consequences of ATWS acceptable. In addition, a review of the reactor protective system will be conducted with the aim of identifying and correcting areas that might be particularly vulnerable to common mode failures. A schedule for the accomplishing of these objectives is being developed.

Very truly yours, Robert E. Uhrig Director of Nuclear Affairs REU:nch cc: Mr. Jack R. Newman HELPING BUILD FLORIDA

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