ML20037A662

Forwards Summary of Hydrologic Engineering Concerns Resulting from Inadequate Util Response to AEC Re Hurricane Protection

ML20037A662
Person / Time
Site:	Crystal River
Issue date:	07/10/1972
From:	Harold Denton US ATOMIC ENERGY COMMISSION (AEC)
To:	Deyoung R US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 8003250677
Download: ML20037A662 (3)

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tiehard C. DeYoung, Assistant Director for PlR's, L~

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. MYDROLOGIC ENGINEERING CONCERM FOR CRYSTAL RIVER NUCLEAR FIAN PLANT NAME:

Crystal River Nuclear Generating Station, Unit 3 LICENSING STAGE: FSAR DOCKET NUM3ER: 50-302 RESPONSIBLE BRANCH: Site Analysis Branch REQUESTED COMPLETION DATE1 July 10, 1972

-APPLICANTS RESPONSE DATE NECESSARY FOR NEXT ACTION PLANNED ON PROJECT:

N/A DESCRIPTION OF RESPONSE: Probable Mwimm Hurricane Analysis REVIEW STATUSs Awaiting Info.

Enclosed is a sunnary of the hydrologie engineering. concerns prc:apted by the~ applicant's inadequate response to quo tion 2.1 on hurricane protection, a ained in the January 17, 1972 letter to Florida Power Corporation fr.;,a R. C. DeYoung, as discussed in the letter of tra. sit:a1 for. bend.:: ant 18, dated April 28, 1972.

This informatica was requested by the project leader for transmittal t.o the applicant.

Origin! signed by LL IL Devon Barold R. Denton, Assistant Director for Site Safety Directorate of Licensing

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v-HYDROLOGIC ENGINEERING CONCERN CRYSTAL RIVER NUCLEAR GENERATING PLANT UNIT 3 DOCKET No. 50-302 i

The PSAR review of the design bases for protection of safety related facilities against hurricane induced flooding concluded that the final establishment of probable maximum hurricane criteria by ESSA (now NOAA)-

would require further study of the Crystal River site.

The PSAR safety evaluation on this tubject states "the applicant has stated, and we will require, that the plant protection will conform to the applicable portions of revised ESS'A criteria." The FSAR reported.the use of criteria that we cad our consultant, the U. S. Army Coastal Engineering Research Center, do not 'believe would cause the worst. flood ' conditions 1

at the site (see question 2.1 in the R. C. DeYoung letter to Florida

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Power Corp., dated January 17, 1972).

Our preliminary estimates lead us to believe the surge could reach approximately elevation 123.4 feet (your datum), with correspondingly higher estimates of wave action which could occur coincidentally with-such an event.. Protection of plant safety related facilities against your surge estimate of 24.6' feet above mean low wat,er (MLW) is not considered acceptable in view of (a) your PSAR con $[ttment to provide protection against-a probable maximum hurricane' (PMH), (b) the flood protection substantion indicated in the draf t Standard Format and Content of Safety Analysis Reports for. Nuclear Power.

Plants, dated February, 1972,-(c)'the necessity of.providing'a consistantly high degree of protection to safety _ related facilities, (d)_ the occurrence T-of a water level of 24.2 ft. (MSL) at Pass Christian, Mississippi from k

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2 Hurricane Camille (1969), and (e) your indicated hurrican protee:1cn is not considered adequate in light of recent hurricane experience and the fon* 21ation of more stringent F'E. criteria.

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