ML20210T189

Forwards Accident Analysis Branch Revised SER Input Re Aircraft Activities in Site Vicinity & Tornado Missile Velocities

ML20210T189
Person / Time
Site:	Satsop
Issue date:	10/06/1975
From:	Harold Denton Office of Nuclear Reactor Regulation
To:	Deyoung R Office of Nuclear Reactor Regulation
References
CON-WNP-1673 NUDOCS 8605290792
Download: ML20210T189 (4)

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j WPPSS 3, 5 REVISED SER INPUT 2.2 Nearby Industrial, Transportation, & Military Facilities (Aircraft)

Elma Municipal Airport is located approximately two miles north-east of the site. The airport has a single turf runway 2,000 feet in length and is used by light private aircraft. It is estimated that, at present, there are approximately 1,825 operations per year. The applicant states that expansion of the airport is currently under study and, depending on the results of the study and availability of resources, there are plans to pave the runway and extend it to approximately 3,500 feet. With the proposed improvements the airport will be capable of handling aircraft up to 12,500 pounds gross weight. The applicant cites a Washington State planning document which projects a growth to approximately 4,000 operations per year for the Elma Airport.

The Federal Aviation Administration's national airport system plan, published in 1972, projects 7,000 operations per year at i

Elma in 10 years, all of which will be aircraft under 12,500 pounds.

l The nearest airport with com'mercial scheduled flights is Bowerman Airport located in Hoquiam about 22 miles west of the site. An j airway between Olympia and Hoquiam passes near the site area and l

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2.2 Nearby Industrial, Transportation, & Military Facilities l (Aircraft) (Con't.d) '

there are currently twc scheduled flights per day between these cities at altitudes between 5,000 and 10,000 feet. This airway is also routinely used for training flights by the U. S. Army from Fort Lewis, Washington, flying single and twin-engine military (Army) aircraft and helicopters. The average number of

. military flights on' this airway is estimated on the basis of information provided by military operations and FAA personnel to the applicant, to be approximately 12 to 15 per month. A high altitude airway passes about 12 miles from the site. On the basis of previous analyses of aircraft activity at other nuclear power plant sites, we conclude that the aviation facilities in the vicinity of the site are not significant with respect to plant safety.

3.5.1 Tornado Hissiles The applicant has committed to design the WPPSS 3 and 5 ' facility to withstand the impact of the tornado-generated missiles listed in Table 3.5.3 in the PSAR, and summarized in Table 1. We find ,

this acceptable.

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TABLE 1 TORNADO GENERATED M,1SSILES A - Wood plank 4" x 12" x 12' 200 lb 350 fps B - Stee'l pipe 3" 6, 10' long, schedule 40 78 lb 175 fps C - Steel rod 1" 6 x 3' long 8 lb 260 fps D - Steel pipe 6 6 15 ' long, schedule 40 285 lb 175 fps E - Steel pipe 12" 6, 15' long, schedule 40 743 lb 175 fps F - Utility pole 13.5" 6 x.35' long 1490 lb 175 fps G - Automobile 20 ft2 frontal area -

4000 lb 90 fps These missiles are to be considered as striking in all directions.

Missiles A, B, C, D, and E are to be considered at all elevations and missiles F and G at elevations up to 30 feet above all grade levels within 1/2 mile of the facility structures.

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