ML20197G623

Notification of 840615 Meeting W/Util in Bethesda,Md to Discuss Applicant Analysis of Tornado Missile Effects on UHS

ML20197G623
Person / Time
Site:	Limerick
Issue date:	06/08/1984
From:	Martin R Office of Nuclear Reactor Regulation
To:	Schwencer A Office of Nuclear Reactor Regulation
References
NUDOCS 8406150347
Download: ML20197G623 (11)

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UNITED STATES o NUCLEAR REGULATORY COMMISSION f  ;$ WASHINGTON, D. C. 20555

\...../ msm Docket No. 50-352/353 MEMORANDUM FOR: A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing FROM: R. E. Martin, Project Manager Licensing Branch No. 2 Division of Licensing

SUBJECT:

FORTHCOMING MEETING WITH PHILADELPHIA ELECTRIC COMPANY ON THE ANALYSIS OF TORNADO MISSILE EFFECTS ON THE ULTIMATE HEAT SINK DATE & TIME: Friday, June 15, 1984 9:00 - 5:00 LOCATION: Maryland National Bank Building Room 6110 Bethesda, Maryland PURPOSE: The applicant and the staff will discuss the applicant's analysis of tornado missiles dated March 22, 1984 focussing on the notes in the enclosure.

PARTICIPANTS *: NRC PECo J. Wilson T Robb F. C1emenson J. Ridgely E. Markee R. Martin E. Simiu, NBS

/

R. E. Martin, Project Manager Licensing Branch No. 2 Division of Licensing cc: See next page

• Meetings between NRC technical staff and applicants for licenses are open for interested members of the public, petitioners, intervenors, or other parties to attend as observers pursuant to "Open Meeting and Statement of NRC Staff Policy,"

43 Federal Register 28058, 6/28/78.

8406150347 840608 PDRADOCKOS000g A

Questions add Coments Concernina Report NUS-4507 TAmarick Generatino Station. Ultimate EELt SADK Extreme MADd Bazard Analysis

1. Hurricane Winds n e hurricane wind statistics proposed in the Report are based on the assumption that the friction coefficient accounting for terrain roughness is 0.45 (p. 3-3, first paragraph). It is noted in NE 23 (Schwerdt, et al.,1979), from which this coefficient is taken, that the value of 0.45 was based upon the factor observed at Brookhaven National Iaboratory,

" considered a rough site" (Schwerdt, et al.,1979, p. 268) .

Se roughness at Brookhaven has been estinated to be of the order of zn = 1.00 m, owing, notably, to the presence of wooded areas (see I.A.

Singer, et al., "Se Micrometeorology of the Erbulent Flow Field in the Atmospheric Boundary Surface Layer," in Proceedinas 9f j;be International Research Seminar 90 MiDd Effects 9D m ildincs add Structures, Vol. 1, Univ.

of Toronto Press,1968, pp. 557-594) . On the other hand, the terrain roughness at Limerick appears to be lower, i.e., zo = 0.4 m (see Appendix A). It would then follow that the friction coefficient, rather than being 0.45, would have a value close to the average of the values 0.45 and 0.78 (see Fig.15.4 of NE 23, attached herewith), i.e., 0.61, say.

Use of this factor would increase the hurricane wind speeds at Limerick by about 35 percent. B is would cause a shift to the right of the curves in Figs. 3-1(a) and 3-3(b) of the Report, even if gust factors with values i less than 2.2 were used for the 2-sec wind.

'Ahat is the effect of such a shift upon the frequencies of exceeding IDTR Part 100 limits?

2. Sanplina Errors ID Estimation 91 Extreme "Straioht" add Hurricane Nimds. .

Se probability distribution of extreme " straight" winds is estinated in the Report on the basis of a sanple of only ten largest yearly wind speed data. Se precision of the estinates based on a 10-<5ata sanple is, as a rule, unsatisfactory. For exanple, in the case of the Philadelphia l Airport, the method of moments yields, for the estinated 2000-yr wind based i on a 1(H5ata sanple, the 95 percent confidence interval 83.2t23.0 uph i (fastest mile) - see Extreme WiDd Speeds at 122 Stations in .the united States, NBS BSS 118, p he precision of the estinates would increase byafactorof(23/10)I/g=35,1.52 if all the 23 data available for the PhiladeIRila Airport station were used. '

Sanp' ling errors also are inherent in hurricane wind speede'stinates (see Batts, et al., "Sanpling Errors in Estination of Extreme Burricane Winds," L StL DiL, ASCE, Oct.1980, pp. 2111-2115) .

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What is the expected effect of accounting for sanpling errors in j estinting " straight" and hurricane wind speeds upon the estinted freqaen-cies of exceeding 10CFR Part 100 limits?

3. Auta DEml in calculation d Tornado Hind Speed FreqJenCies i It is indicated on p. 3-10 of the Report that the area used in  !

estinting tornado wind speed frequencies (the target area) consists of an envelope enclosing the spray pond networks and cooling towers. An explanation is requested as to: (a) why the target area does not consist of the entire missile origin area, rather than of the above rentioned '

envelope, and (b) what would be the effect of such an extension of the target area upon the estinates of the frequency of exceeding 10CFR Part 100 limits.

4. Effect sf High Winds U2Rn Sprav DDd Network Pipes For the sake of cocpleteness, brief calculations should be included indicating the magnitude of stresses induced in distribution pipes and their connections by winds assumed to be acting in a direction norral to the 200 ft side of the pond.

. 5. Desien add Failure WiDd Speeds 191 Coolino Towers It is indicated on p. 4-29 of the Report that the towers have been designed for a basic wind of 90 nph at 30 ft above grade and up to 135 nph at 500 ft above grade,

a. What is the Report's definition of the basic wind speed? Is it the fastest-cile wind speed over open terrain?

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b. What is the precise definition of " designed for," i.e., was an allowable stress, or an ultinate stress approach used in the design of the tower for a basic wind of 90 mph?

c. What are the heights of the towers? From p. 4-7 one might infer that they are 485 ft. Is this inference correct? What does the 500 ft l elevation mentioned in line 2, Sect. 4.4.3.1 represent? A sinple sketch of l the towers should be included, indicating: the elevations of the top and bottom of the towers; the curb wall; and the fill areas, l d. Is the 140 nph speed at which the towers are assumed to fail a speed averaged over 2 seconds? m Answers to these question are needed to allow the estination of the load factor for the wind load.

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6. FaJivalence Between Straicht E Hurricane Winds ad 'Ibrnado Winds IJs.ed in Eigh Analysis It is indicated on p. 3-13 of the Report that nontornadic winds were treated by adjusting the tornado F-scale occurrence rates according to Fig. 3-3(b) and that "it will be seen later that the results of this study are insensitive to these approximations."

What is the nunber of the page or of the section where this is shown?

Explain why this approxis tion is acceptable.

7. Direction g Translation d Tornadoes Bas the probability distribution of the direction of tornado transla-tion been accounted for in the calculations? If not, and if there is a predominant direction of tornado translation (e.g., most tornadoes noving in the northeast direction), what would be the effect of taking this factor

, into account on the estinated frequency of exceeding 107R Part 100 limits?

Ris qJestion is asked because it appears, intuitively, that tornadoes noving in the northeast direction could destroy the towers and hurl mis-siles on the spray ponds.

Appendix &

Table Al shows wind speeds measured at Limerick (from Table 3-1 of the Report), and wind speeds at the Philadelphia Airport.

S e friction velocity is given by the expression

.u. = uhourly(z)/2.5 in (z/zo) .

At the Philadelphia Airport (open terrain, zoa 0.05 m) uP a 41.17/2.5 in (30x0.3048/0.005)

• 3.11 uph.

If the roughness length at Limerick was zo a 0.4 m, then uL a 29/2.5 in 30x0.3048/0.4 = 3.706 and uf/uP al.19. Bis ratio is consistent with experinental results given in (Bietry, et al., "Mean Wind Profiles and Change of Terrain Roughness,"

ASCE o*0.4morso(u./u? pen a 1.15 for

' zo iL. =Struct. Din,f 0.3 m; u./u , Oct.1978) a 1.33 forfor z zo=1m;u./ugpen=1.46forzo = 2.5 m).

On the other hand, if the roughness length at Linerick was z 1.0 m (i.e., close to the roughness of the Brookhaven site), then ', o uh=29/2.5in30x0.3048/1.08 5.24

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uL*/uP

= 1.68 > 1.33.  !

It is concluded that the wind speeds measured at Limerick and at the ,

Philadelphia Airport are not capatible with the hypothesis that j zo a 1.0 m. ,

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Table A1. Wind Speeds at Linerick and at P5iladelphia Airport, in MPH Limerick Philadelphia Airport 30 ft, elev. 20 ft. elev. 30 ft, elev. 30 ft. elev.

(hourly speed) (fastest-mile (fastest-cile (hourly speed)b speed)" speed)a (1) (2) (3) (4) 1972 30 43 47 38 1973 27 47 51 42 1974 28 40 44 36 1975 30 47 51 42 1976 32 50 55 45 1977 27 49 54 44 Mean 29 nph 41.17 nph aFrom Extreme HiDd Speeds At 121 Stations in j;bg Conticuous United States, NBS BSS 118, 1979, h ed cn HiDd Effects DD Structures by E. Simiu and R.H. Scanlan (Eq. 2.3.30, p. 62) and the assunption zo = 0.05 m (open terrain).

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270 A schematic portrayal of adjustments is shown in figure 15.4. The k values shown are for overwater wind speeds > 73 kt (135 km/hr). Figur 15.2 15 shows that k, varies with wind speed < 73 kt.

15.3.1 (KM) It is  ;

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I O 5 10 15 20 crosses  !

0 5 10 15 20 l l l l  !

l l l 1 l1 mos t p r.  !

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s WIND PATH nounced s s ,

) > x x 3

15.3.3 BOUNDARY WATER TO BOUNDARY NONWATER NONWATER SURFACE TO WATER SURFACE l i

Palme IW lO the Ear  !

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LL KetW ATE RI K  : ; resulti ,L 4 LJ K

'  ? < K <K e tWA TER I '

decreas I l.0 -

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3111er l7 K,' = Kc=om[,N . ~. _ , "e W A m = 0E 7 p

filling

,g K, = Mc "00( K e ILA NDi= 0.78 -

ture (0

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\ / NO TE: Ke VALUES FOR g$ sN Ke I.R OUGH / WIND SPEEDS >73 s_ T ER R Apl = 0;g _ f KT (135 KM/HR) Palme, .

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DaroCli 2 - """ 'k'~**' - has son FROM WATER NONWATER TO WATER upper I

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I 0 } l l I I f f I I " 18' f O 5 10 0 5 10 leading  !

(N Ml) this pt I DISTANCE ALONG WIND PATH si to Malb l l

intrint ,  !

Figure 15.4. Schemtic of nearshore frictional adjustments. l

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We se events by Mall i

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l Limerick Mr. Edward G. Bauer, Jr.

Vice President & General Counsel  :

Philadelphia Electric Company  :

2301 Market Street Philadelphia, Pennsylvania 19101 cc: Troy B. Conner, Jr., Esquire Mr. Marvin I. Lewis Conner and Wetterhahn 6504 Bradford Terrace 1747 Pennsylvania Avenue, N. W. Philadelphia, Pennsylvania 19149 Washington, D. C. 20006 Frank R. Romano, Chairman Zori G. Ferkin Air & Water Pollution Patrol Assistant Counsel 61 Forest Avenue Governor's Energy Council Ambler, Pennsylvania 19002 P. O. Box 8010 1625 N. Front Street Charles W. Elliott, Esquire Harrisburg, Pennsylvania 17105 Brose & Poswistilo,1101 Bldg.

lith & Northampton Streets Honorable Lawrence Coughlin Easton, Pennsylvania 18042 House of Representatives Congress of the United States Phyllis Zitzer, President Washington, D. C. 20515 Limerick Ecology Action P. O. Box 761 Roger B. Reynolds, Jr., Esquire Pottstown, Pennsylvania 19464 324 Swede Street

Norristown, Pennsylvania 19401 Mr. Karl Abraham Public Affairs Officer Frederic M. Wentz Region I County Solicitor U.S. Nuclear Regulatory Commission County of Montgomery 631 Park Avenue .

King of Prussia, PA 19806 Courthouse Norristown, Pennsylvania 19404 Mr. Suresh Chaudhary Eugene J. Bradley Resident Inspector Philadelphia Electric Company U.S. Nuclear Regulatory Commission Associate General Counsel P. O. Box 47 2301 Market Street Sanatoga, PA 19464 Philadelphia, Pennsylvania 19101 Joseph H. White III Mr. Vincent Boyer 8 North Warner Avenue Senior Vice President Bryn Mawr, PA 19010 Nuclear Operations Philadelphia Electric Company James Wiggins, Sr. R. I .

230' Market Street U. S. NRC  ;

Philadelphia, Pennsylvania 19101 P. O. Box 47  ;

Sanatoga, Pennsylvania 19464

Limerick . -

Thomas Gerusky, Director Sugarman, Denworth & Hellegers Bureau of Radiation Protection 15 th Floor Center Plaza Dept. of Environmental Resources 101 North Broad Street 5th Floor, Fulton Bank Bldg. Philadelphia, Pennsylvania 19106

. Third & Locust Streets Harrisburg, Pennsylvania 17120 Angus Love, Esq.

Director, Pennsylvania Emergency 107 East Main Street Management Agency Norristown, Pennsylvania 19401 Basement, Transportation &

Safety Building Harrisburg, Pennsylvania 17120 Lawrence Brenner, Esq.

Robert L. Anthony Administrative Judge Friends of the Earth of the Atomic Safety & Licensing Board Delaware Valley U.S. Nuclear Regulatory Conmission 103 Vernon Lane, Box 186 Washington, DC 20555 floylan. Pennsylvania 19065 Dr. Peter A. Morris Martha W. Bush. Esq. Ada'nistrat've Judge Deputy City Solic' tor Aton#: Safety.& L'cens'ng Board Municipal Services Bldg. U.S. Nuclear Regulatory Commiss#on 15th and J FK Blvd. Washington. DC 20555 Philadelphia, PA 19107 ,,

David Wersan, Esq. Dr. Richard F. Cole Assistant Consumer Advocate Administrative Judge Office of Consumer Advocate Atomic Safety & Licensing Board 1425 Strawberry Square U.S. Nuclear Regulatory Commission Harrisburg, Pennsylvania 17120 -Washington, D. C. 20555 Stev.n P. Hershey, Esq. Mr. J . T . Robb , N2-1 Conrnunity Legal Services, Inc. Philadelphia Electric Company i Law Center North Central - Bevry Bldg. 2301 Market Street 3701 North Broad Street Philadelphia, Pennsylvania 19101 Philadelphia, Pennsylvania 19140 Mr. Spence W. Perry, Esq.

Jacqueline I . Ruttenberg. Esq. Associate General Counsel The heystone Alliance Federal Energency Managt: ment Agency 3700 Chestnut Street Roon 840 Philadelphia, Pennsylvania 19104 500 C St. , S.W.

Washington, D. C. 20472 Timothy R. 5. Campbell, Director Department of Emergency Services 14 East Biddle Street West Chester, Pennsylvania 19380

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Docket No. 50-352/353 MEMORANDUM FOR: A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing

.FROM: R. E. Martin, Project Manager Licensing Branch No. 2 Division of Licensing

SUBJECT:

FORTHCOMING MEETING WITH PHILADELPHIA ELECTRIC COMPANY ON THE ANALYSIS OF TORNADO MISSILE EFFECTS ON THE ULTIMATE HEAT SINK DATE & TIME: Friday, June 15, 1984 9k00 - 5:00 LOCATION: Maryland National Bank Building Room 6110 Bethesda, Maryland PURPOSE: The applicant and the staff will discuss the app 1tcant's analysis of tornado missiles dated March 22, 1984 focussing on the notes in the enclosure.

PARTICIPANTS *: NRC PECo D11 son E Tobb F. Clemenson J. Ridgely E. Markee -

R. Martin E. Simiu, NBS R. E. Martin, Project Manager Licensing Branch No. 2 Division of Licensing cc: See next page

• Meetings between NRC technical staff and applicants for licenses are open for interested mmbers of the public, petitioners, intervenors, or other parties to attend as observers pursuant to "Open Meeting and Statement of NRC Staff Policy."

43 Federal Register 28058, 6/28/78.

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n c ro:u aia no, o unc" 2' OFFICIAL RECORD COPY c u.s.cm on-4oom

.- .. - .. - . . . . . . . . ~ _. _ . . 4

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Date: June 8.1984 MEETING NOTICE DISTRIBUTION:

fDocument1C ontro11(50 352/)53? NRC Participants u NRC.PDR J. Wilson R

]; F. Clemenson h3 J. Ridgely PRC LB#2 . Reading n E. Hylton E* Simiu* NBS Project Manager R. Martin A. Schwencer . ._

H. R. Denton/E. G. Case D. G. Eisenhut/R. A. Purple T. M. Novak B. J. Youngblood G. W. Knighton .

E. Adensam F.'Miraglia E. Butcher D. Crutchfield

c. Grimes, SEPB G. Holohan C. Thomas G. C. Lainas S. Varga D..Vassallo J. R. Miller J. Stolz ,

R. H. Vollmer J. P. Knight R. J. Mattson L. Rubenstein W. Houston D. Muller .

T. Speis F. Schroeder F. Rowsome H. Thompson T. W. Russell ACRS (16)

OELD Attorney vooler E. L. Jordan, IE N. Grace F. Ingram, PA Receptionist (if meeting held in Bethesda)

Region I cc: Service List

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