ML102920089

9.1 Hurricanes or Tornadoes

ML102920089
Person / Time
Site:	Crystal River
Issue date:	03/17/2010
From:	- No Known Affiliation
To:	Office of Information Services
References
FOIA/PA-2010-0116
Download: ML102920089 (1)

Text

9.1 Hurricanes or Tornados

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Description:==

External forces, with the potential-to challenge the design bases of containment, can be applied to the containment structure if hurricanes or tornadoes enter the Crystal River site.

Data to be collected and Analyzed:

1. Search historical records for hurricanes and tornadoes entering the local area. (NOAA internet data base)

2. Review the design bases of the containment structure. (FSAR Chapter 5. Section 2.1)

Verified Refuting Evidence: Verified Supporting Evidence:

a. Hurricanes - The strongest hurricane to approach the Crystal River area since 1965 was a None Category 3 (110-130 mph winds) on August 13, 2004 and did not approach closer then 100 miles to the South. The largest huricane in the vicinity of Crystal River since the plant began service was Category 1 (sustained wind speeds less than 96 mph) (1995, 2000, and 2004)

(NOAA internet data base).

b. No recorded tornado of any significant size or strength approached the site area. (NOAA internet data base)

c. None of the containment design parameters for winds or external pressure loading, from any source, listed in FSAR Chapter 5 Section 2.1 (FM 9.1 Exhibit 1) have either been approached or exceeded since initial construction.

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Conclusion:==

Potential external forces applied to the containment structure did not contribute to the delamination since no recorded local hurricane or tornado with sufficient strength entered into the CR3 site since 1965.

May identify additional perspective on this issue as RCA related efforts proceeds 03/17/2010 DNR -PI!F ud 1 1 4 ,~C 1