ML19329D587

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Concurs W/Army Engineer Opinion Re Recommended Water Levels for Design Purposes
ML19329D587
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 10/01/1973
From: Trayers J
ARMY, DEPT. OF, CORPS OF ENGINEERS
To: Deyoung R
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 8003160175
Download: ML19329D587 (3)


Text

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AEC D7 IIBUTICN FOR PART 50 DOCRET PA' IAL 7407

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XXX 1 50-302 DESCRIPTION: ENCLOSURES: <

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PLANT NAME: Crystal River #3 FOR ACTION /INFORMATION 10-5-73 JB BUTLER (L) SCFJENCER(L) ZINANN(L) REGAN(E)

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CEREN-DE 1 OCT 1373 C; J Q iU /

hlr. Richard C. DeYoung 4:57c., U '

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Dear h!r. DeYoung:

Reference is made to your letter of 6 ofarch 1971 regarding Docket 50-302, the Final Safety Analysis Report (FSAR) and subsequent Amendments 1 through 28 thereto, for Florida Power Corporation's Crystal River, Unit 3.

In accordance with our arrangement, an engineer from the CERC staff has reviewed pertinent information in the (FSAR) report leading to the esta-blishment of the maximum and minimum design water levels at the plant site. It is his opinion with which I concur, that for design purposes the following water levels should be required:

a. Probable ?.faximum Still Water Level, exclusive of wave action, El. 121.4 ft. (El . 33.4 ft. , 51LW) .
b. Probable h!inimum Water Level El. 79.0 ft. (E1.- 9. 0 f t . , 5tLW) .
c. Slinimum Flood Protection Level El 127.0 ft. (El. 39.0 ft.,blLW).

Re-analyses of the Probable >!aximum hurricane parameters and the mathe-matical hurricane surge model have confirmed our earlier determination of the Probable 5faximum still water level at El 121.4 ft. (El. 33.4 ft.,FILW).

The. applicant, although proposing a Probable ?!aximum still water level of El.'117.4 ft. (El. 21.4 ft. , S!WL), has provided calculations for the wave runup and flood protection level resulting from wave action coincident with 7107

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.CEREN-DE 1 OCT 1373 Str. Richard C. DeYoung the higher water level of El. 121.4 ft. (El . 33.4 ft. ,5tLN) . These calcula-tions are contained in Section 9.0 of the appended report " Crystal River Unit 3 - Hurricane Study," Gilbert Associates, Inc., Report No. 1807, July 11, 1973. I concur with the applicant's analysis, presented in this latter supplement,'that flood protection to either El 127.0 ft. (El . 39.0 ft. ,

b!LW) provided the embankments on the south and west sides of the plant are increased to El. 127.0 ft. (El . 39. 0 ft. , SILW) , or El . 129.0 f t. - (El . 41.0 ft.,SILW) provided the embankments on the south and west sides of the plant are maintained to El. 118.5 ft. (El. 30.5 ft., SILW) is consistent with a Probable h!aximum still water level of El. 121.4 ft. (El. 33.4 ft.,SfLW).

Sincerely you s, A>!ES L. TRAYERS '

olonel, Corps of ngineers Commander and Director CF: bir. L. G. Hulman, AEC 2

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