ML19326C905

Forwards Interpretive Rept on Diel Changes in Impingement Levels Per ETS 6.3.Further Investigation Deemed Unwarranted

ML19326C905
Person / Time
Site:	Arkansas Nuclear
Issue date:	07/01/1976
From:	Cavanaugh W ARKANSAS POWER & LIGHT CO.
To:	Ziemann D Office of Nuclear Reactor Regulation
References
6627, NUDOCS 8004290535
Download: ML19326C905 (54)

Text

{{#Wiki_filter:U.S. NUCLE AR REGULATORY t - * ** SSICH DOCKET NUMBE A 95 So - 3/3 .c$on ss FILE NUMIER NRC DISTRIBUTION roR PART EO DOCKET MA1 ERIAL g g 50: i FHOM: ARKANSAS POWER & I;IGHT CO DATE OF DOCUMENT 7-/-7(, ~ LI'ITLE EOCK, ARK W CAVANAUGH III CATE RECElVED IG D L ZIEMAN 7-2-76 NUMBER OF COPIES RECEIVED INPUT FORM ONorORezED PROP hLETTEn annotNAL UNCl. ASSIFIE D M C-.s. C' M ENCLOSU RE DIEL CHANGES IN IICIhGEMENT LEVELS IN e DE1CR PTION III'R TRANS T3 FOLIDWING........ COMPLIANCE WITH EINIRONMENTAL TECH SPEC... ACKNOWLEDGED THIS DOCUMENT CONTAINS P00R QUAUTY PAGES DONOT REMOVE PLANT NAME: h Q.bg,g 3 -$p d_., I L I i 50 l P3 P,a FOR ACTION /INFORMATION ENVTRO 9 % Mk SAFETY ASSIGNED ADr ASSIGNED AD: TOuna dent-) /BRASCH CHIEF: 7iEMA f\\ A / ERANCH CHTEF* MT9. Ant t% ~ / PROJECT MANAGERr PROIECT MANAGER: V.12.Eu T %G.'t.; O")) 7'1IC. ASST.: Dg5 y ,LIC. ASST.s INTERN AL DISTRIBUTION ~NE[ FILE) SYSTEMS SAFETY PT. ANT SYSTEMS SITE san.1r & EtNIRO ANALYSIS HEINEMAN TFnFRen k"NRC PDR v'T & E (2) SCHROEDER BENAROYA Y DENTON & MUT T.ER LAINAS v'OELD ENGINEERING IPPOLITO ENVIRO TECH - /COSSICK G STAFF MACCARRY KIRKWOOD FRNST MIPC X BALLARD KNICHT CASE OPERATING REACTORS SPANCT.ER SIliWEIL HANAUER PAWLICKI STELLO EABLEjiS RTTP TFCH; PROJECT MANAGEMENT REACTOR SAFETY OPERATING TECH. CAMMTT1 ROSS X EISENHUT STEPP BOYD HULMAN NOVAK SHA0 _P. COLLINS ROSZTOCZY BAER HOUSTON SITE ANALYSIS CHECK BITTLER b( CRIMES 'i VOT.T.MER PETERSON MELTZ BUNCH AT & I /HELTEMES X J. COT.T.TNS SALTZMAN SKOVHOLT X KRFCE7 RUTBERG CONTR0gUMBER 1 EXTERNAL DISTRIBUTION I V LPDR:Ku%EGAIMe. MMX NAT LAB (37 09ML BROOKHAVEN NAT IAB n REC. VIE " ULRIKSON(ORNL) y' TIC: [ / f LA PDR [f M Sic. VJ CONSULTANTS ASLB; NOO4 390 f3$~ ACRS ((.CYS HOLDING /SENT

4-gegu\\a'al Ce.' red "(\\\\f;Q._ ~ neLeona uusto. annsup. 'Y ~ l l , 21 v r [9'7gA ARK ANS AS POWER & LIGHT COMPj OTH G LaufGI AN A GTAseTS. LITTLe ROC (. AAK ANSA: "O" 00 372-4 T \\- July 1, 1976 g' 'Q. \\ _- f a en O (U_[J u g s\\ LJ I D JUL2 1970 " 9 Director of Nuclear Reactor Regulation ui ugp* ,,,,,'OTm ATTN: Mr. Dennis L. Ziemann, Chief c; f Operating Reactor Branch #2 U. S. Nuclear Regulatory Commission g Washington, D. C. 20555 to

Subject:

Arkansas Power 6 Light Company Arkansas Nuclear One-Unit I Docket No. 50-313 License No. DPR-51 Diel Changes in Impingement Levels Gentlemen: In compliance with Environmental Technical Specification 6.3 we hereby submit our interpretive report on the subject study. Based on the report's conclusions, further investigation in this direction is unwar-ranted. Therefore, we do not plan to p rsue the matter further. V y truly you 8-r i William anaugh II Assistant Director Power Production WC:ay 66L husueenmiooLesou 1.x AAv ~u.,~vesro A owneo .L Ties sysrem

I a a t INTRODUCTION A.. environmental concern of major utilities utilizing once through cooling ; fish impingement on the intake screens. Arkansas Nuclear One - Unit One, which became operatienal during the latter part of 1974, ~ experienced a high rate of fish impingement during the subsequent fall and winter months. The impinged species were almost all Threadfin and Gizzard Shad. Of these the vast majority were Threadfin. During the fall and winter months the sample weight per 24-h'our period varied from 30 pounds to over 27,000 pounds. In view of such large quantities of fish being impinged Arkansas Power 6 Light Company intensified its search to define causal relation-ships in this observed phenomenon. Consultation with the Nuclear Regulatory Commission resulted in a decision to perform a diel study. The objective l .of this study was to ascertain if fluctuations in impingement leve s cor-i l i 4 elate with time of day and if so whether alter ng p ant operat onal status at certain times of day would affect impingement levels accordingly. 1 l

DESCO.IPTION OF ARKANSAS NUCLEAR ONE, UNIT 1-Arkansas Nuclear One, Unit 1 is located in Pope County, Arkansas, 2 mi (3.2 km) sautheast of the city of London on a peninsula formed by Dardanelle Reservoir. The site encompasses approximately 1164 acres (471.4 hectare). Unit 1 is a pressurized water reactor (PNR) with a capacity of 836 Mw. Unit 1, which is designed for once-through cooling, began c6mmercial-operation in December 1974. Cooling water is taken in through a 0.75-mi (1.2-km)-long intake canal to eight forebays. At the confluence of the intake canal and the reservoir, the approach velocity of the intake water is < 0.3 ft/sec (0.09 m/sec). Water velocity increases to 3.0 ft/sec (0.9 m/sec) at one point within the canal due to reduced canal dept h and width where bedrock was not removed. Velocities then reduce to approximately 1.5 ft/sec (0.46 m/sec) along the remainder of the canal up to the intake forebays. Each of the 8 forebays is protected from trash, fish, and other fouling materials by means of a 10-ft (3.1-m)-wide vertical traveling screen constructed of 3/8-in. (0."-cm) wire mesh. There are no fixed screens in front of the traveling screens. The rate of speed of the traveling screens is fixed; however, the pressure. on the wash system can be adjusted. The traveling screens are automatically cleaned by screen wash pumps which dis-charge into high-velocity spray nozzles, washing away debris as the screens travel past the nozzles. Collected trash is sluiced through a trough into one of two trash grinders located in front of screens 4 and 5; the ground L i m l 2 u

I material, plus water, is then discharged in front of screen 2 where it then passes through.the screen and into the Unit-1 condensers. Unit l's four circulating water pumps are designed with a total { gal./ min. : Cooling. water passes through Unit-1 condensers capacity of 762,960 and is returned to Dardanelle Reservoir via an effluent canal and 80-acr (32.4 hectare) discharge bay. O j i 3 t.

CilARACTERIZATION OF DARDANELLE RESERVOIR Dardanelle Reservoir is part of the McClellan-Kerr Arkansas River . navigation system which extends from the confluence of the Arkansas and Mississippi Rivers to Catoosa, Oklahoma, on the Verdigris River, a dis-tance of 500 miles. The reservoir surface coverage varies from 34,300 to 36,600 surface acres, and the length of the shoreline is 315 miles 2 at a pool elevation of 338 feet. It drains a 153,666-mi area. The reservoir's maximum volume since being filled was 502,000 acre-feet on June 5, 1974 at a pool elevation of 338.45 feet above mean sea level; minimum volume since being filled to the bottom of the power pool was 415,000 acre-feet on October 13, 1969 at a pool elevation of 335.8 feet. Over the thirty-four year period extending from 1923 to 1957, the Arkansas River at Dardanelle Reservoir produced an average daily dis-charge-of 34,260 feet /sec. or 24,820,000 acre-feet / year. During that 3 3 period, the maximum daily discharge was 683,000 feet /sec. on May 13-14, 3 1943 and the minimum daily discharge was 400 feet /sec. in December,.1970. Major tributaries contributing to Dardanelle Reservoir include Six Mile Creek, Ibrschead Creek, Spadra Creek, Cane Creek, Big Shoal Creek, and Big Piney Creek as well as Delaware Creek and the Illinois Bayou. Dardanelle Dam (Lock and Dam 10) is 259 miles upstream from the mouth of the Arkansas River and is the first of four dams with storage for hydro-Construction of this dam was initiated in 1957 and commercial gen-power. eration began in-1965. J 4

The minimum and maximum pool elevations behind Dardanelle Dam are 336 feet. and 338 feet, with a normal power generation storage capacity of two feet. Power generation is. based on mean daily inflow equaling mean daily outflow within the -336 to 338 feet limits. The four hydro-electric generating units at Dardanelle Dam produce a total power out-put of 124,000 kw (124 mw). Dardanelle Reservoir water temperatures, dissolved-oxygen levels, and other physiochemical parameters exhibit seasohal patterns typical of a southern (temperate) storage reservoir. Water temperatures ran3e from near-freezing in winter to approximately 90 F (32 C) in summer. 0 0 Dissolved oxygen levels follow a seasonal pattern inversely related to water temperatures. The reservoir currently possesses a relatively diverse warm-water fish community (53 species comprising 18 families) and supports a small commercial fishery as well as a growing sport fishery. STUDY DESIGN The diel study was originally planned to begin on October 1, 1975 and continue until April 1,1976,- but due to a delay in receiving the technical specification change and procedure development, a delay in implementation was requested and granted (letter from Mr. B. J. Youngblood to Mr. William Cavanaugh III, dated October 15, 1975). The revised study was scheduled for Novemb'cr' 1,1975 to May 1,1970. The study required subdividing a' regular 24-hour impingement sample into three eight-hour samples. The following data were collected for each sample: The date and time of the sample, the species, the number or 4 5 s 5 .c

(in mm) for estimated number impinged for each specie, the maximum length dl i ht each specie, the modal length (in mm) for each specie, the mo a we g (in grams) for each specie and the nunber of pumps operating duril . sample collection. (See tables 1-30). The plant The program continued as planned through March, 1976. during went off line during the latter part of March and remained down These two missing sampics should the last month of the study period. be-statistically have no effect on the outcome of the study primarilyig cause impingement had returned to the anticipated low level of late spr n and summer. RESULTS Total sample weights ranged from a low of 0.6 pounds and 23 indivi ii to occurring on November 4, 1975 in the 8:00 a.m. to 4:00 p.m. subdiv s on 28, a high of 1923.5 pounds and 84896 individuals which occurred January Num'erically, Threadfin dominated 1976 in the midnight to 8:00 a.m. sample. both sampics, accounting for 65 percent and 99.9 percent of the sample respectively. A two way analysis of variance (see appendix I) shows no statistical The results of the correlation of fish impingement with time of day. h statistical analyses performed are given in tables thirty-one throug, thirty-six, and discussed belev. It was felt that the most significant test that could be performed This test would indicate on the data was a two-way analysis of variancv. / h date any significant differences relative to the time of day and or t e of collection. 6

.r. The test was performed using both the weight and the number of fish obtai ;e-d from'each sample. There were ten observations for each of the three time-of-day readings. In each results significant dif-ferences were shown between dates. Yet, variances relative to time of de: were not statistically significant. The F-ratios for the variance between days were 19.5 for weight and 16.6 for number, significant at the 0.95 and 0.90 confidence level respecitively. The F-ratios for the variance between dici samples was 0.95 for weight and 1.03 for number which is not significant at the 0.75 confidence level. The above test was also run using only two of the three readings for c:ch day. Again, the. F-ratios were significant for the variance between days but not within days. t 7

e, CONCLUSIONS The diel study si.ows no statistically significant fluctuations in im-i P ngement levels correlatable to time of day. This conclusion is consistent'with the most probable explanation of the impingement problem at Arkansas Nuclear One. The explanation is as follows: Threadfin Shad exhibit a strong schooling tendency. They become stressed by cold water temperatures and passively drift with the water currents and become -impinged on the inr.ake screens independent of time of day. t 9 8

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• TOTAL.SAWLE WT. INCLUDES 0.0 LBS OF DEdRIS ACCUMUL AT ION.

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_0 HOUR TOTAL *. ..2.1 LRS.._ - OF S"MPLE: 9 HRS TEMPERATURE: 59 F STATUS: OFF PUMPS IN OPERATION: 4 SAMPLE' COUNTS. 143 SAMPLE WEIGHT: c L INCLUSIVE.. TIME... I NLEI.W AT ERBO A. MODAL -( SPECIES NEE. SPEdINb 4'HR ISPECIES 9 HR MAXIMUM MODAL. s 1 WEIGHT (GR) e 4 TOTAL WEIGH.TILHS) TOTAL COUNT LENGTH (MMI LENGTH (HM) E THR[ADf"{h'hAD ~~ ~~ ^ 1.85 131. 110 6'O TO 90 14 541 'O TO 5 54 545

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• TOTAL.SAuoLE WT.

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ARMANS".5 POWER & LIGHT COMPLNY 'f LNO SCREEN MONITORING gg (. 3 o 7_...... 1 t DIEL STUDY f y-f ' S AMPLEI.~TA<E' ~d 11-19-75.12P' M...TOI. '0A.M. I N ~ INCLUSIVE. TIME.. INLET WATERBOA._.._..4IR. CURTAIN NUMBER OF. CIRCULATING e NOUR. TOTAL. 8 HOUR IQTAL _e. ~ f _OF SAMpt.E s a HRS TEMPERATURE: 58 F STATUS OFF PUMPS IN OPERATION: 4 SAMPLE COUNT: 675~.... SAMPLE WEIGHT 3 8.8 LRS -( i. SPEEIES NA"E . SPECIES 4 MR SPECIES 8 NR max] MUM M00AL MODAL TOTA 1. M IGH.ILBsl TOTAL COUNT LENGTHi>M) LENGTHtMM) a 1 WEIGHTi(WI s 9 ( T THREC0 Fit 4 9440 7.75 643. 154 60 TO 90 14 451 .0 TO 5

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ARKANSAS POWE0 & 1.IGHT COMP;NY . _. _.. _. _,. _ _.. ~ CNC SCZEEN MONITORING o Table 8 o ( 01EL STUDY SAMDLE..TAKENL 12M2-75 _. INCLUSIVE _ II.u.E., .4P.M... 70.12P.M. INLET _WATERBOX. I OF SAmptE: A Hps TFuPERATURE 46 F STATUS 3 0FF AIR CURTAIN hUMBER OF CIRCULAIING PUMPS IN OPERATION: e NOUR. TOTAL SPECIES C uE SAMPLE COUNTt .8.MOUR_ TOTAL.* 4 f .SDECIEh 9.NP 3019 SAMPLE WEIGHT: 44.1 (8s TOTAL WEIGHTtL65) SPECIES 4 PR ~ HAEADFIN SHAD TOTAL count MAAluuM M00AL ( LENGTH (MMI 35.94 LEhGTH(MM) MODAL e t 2767. WEIGHT (GR) e 5 156 NZZ U 'SHADT 60 TO 90 24 465 D I ~ 4.58' 0 TO 5 24 461 155. ~ 252 ~ 60 TU 90' 12 4'69 ( dLNFGILL SUNrgqu n, o S' 0 TO 5 11 424 7 80 ( STRIPED bdS. 60 TO 90 4 571 0 TO 5 6 862 0 24 4 176 90 TO 1ED ( LA% GEM 00TH PASS 2 501 0 04 5 TO 10 1 251 1. 113 f 90 TO 120 1 1001 ._. FLATHEAD fAIFISH_ 0 02. 15 TO 20 1 1001 2. MISS!$SIPPI SILVERSIDE A9 60 TO 90. 2 100% ( 0.09 0 TO 5 2 1001 8. 116 CREEN SONFL5H 90 TO 129 5 635 ( 0 10 0 TO 5 5 631 3. 118 FRESHWATER ORuu 90 TO 120 2 675 C 0.94 0 TO 5 1 331 ~ ~ 22. 298 [IEElTECkAPbES ~ .$~D.'0 5'.. 5 TO 10 13 591 90 70 120 16 739 ( 1. T' 5 [ ' 65.IT'6 30I. ~ ( SKI'dJ CK HERRING 1 1001 [ 0 TO 5 Il l'0 O' f 0.77 14 198 90 TO 120 4 291 18i TO 20 4 299 BLUE CATElsts.. _....._ _..__.____.._..._._S.42..._.. 5. . 235._ . _150.1D. 18D_ CHANNFL CATFITH 4 80%.._ .25 TO....... 30 .3 601 0 56 23. 195 60 TO 90 14 615 ff .E005.51L VUS I 5E' _.....I.. __.3. 05__..... 0 TO 5 15 652 5. ]t 102 _ 90 TO. 129... 5 10 0 %.... O To.. 5. 5. 1001 41 MITE.8 ASS 'a- .%* *"% :. V9N E.W r.

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CRK m SAS POWE3 4 LIGHT C0ppANy '( ANO SCREEN MONITORING o m 23 .( 0 DIEL STUDY ( SA.MP'LE_7 A'(ENL 05-25-76 9 A'. **. T0!'49.N. .[. ( ., _ INCLUSIVE.TI C.... INLET WATERBOA..... -. AIR CURTAIN NUMBER OF CIRCULATING. e NOUR TCIAL 8 Houe TOTAL

• 0F SAMPL E
• A HRS TEMPERATipts 39 F STATUS! OFF Pua*PS IN OPERATION: 4 SAMPLE COUNT 18956 SAMPLE WEIGHTS 464.0 L85

-(. STECIES N4*E SPECIES 9 NR SPECIES 8 HR MAKIMUM MOCAL MODAL TOTAL WEIGHT (L89) TOTAL COUNT LENGTH (wM1 LENGTH (MMI s 1 WEIGHT M41 a 5 (' ~ THREADFIN SHA0 446 41 18916. 166' 90 TO '120 106 964 S TO 10 63 571 GI?2ARD SHAD-. . 4.97 - 25. 249 210 TO 240 6 751 95 TO 100 2 251 i SKIPJACK HFRR INr. 6.46 3. 434 420 TO '450 1 1005 1015 10 1020 1 1001 dHI E C#45' PIE 0.22 3. 147 120TC$150 1 100% 30'70 35 1 1004 ~~ ' ( MISSISSIPPI SILVERS!nE 0 04 6. 94 90 TO 120 2 1005 0 TO S 2 1001 ( BLUF" CAIFI5h 0 12 ' 3. ~547 12b TO. 150 1 1001 15 TO ~20 1 1001 - (

• TOTAL SA *LF wT. TNCLUDEt S.3 LBS OF DEtlRIS ACCUMULATION.

( ( ( 'eth,s ( '4 4-U 'dh-4 4. -e'> m. ..es.k.r-h.e. . l Y @6-DD* ..%h. i .me e li. m ge e.,g h em. ,. g _ ggugss e p.se e.g .d m e Me .em .._w g. h.6.- w g ..gMW4Wh e h e.6* m'.' 6 h8". . 646h t: _ g .p. y ,y pf, - $.%. t s,.z. r&g w u q = ..w.y .~ ~' N 5 _ b d D -_.a.. C

o ARKr.NSI,5 P0eE3 L LIGHT COMPANY '( hble 14 aho SCREEN MONITORING O e ~ ~- ( DIEL STUDY ~^ .( SAMPLE..T AMEN: 01-20-76 4P.M. $TO l'2P.M. e M0uR TOTAL. 8 HOUR TOTAL _*.... INCLUSIVE TIME.. INLET. W ATERBOL. AIR CURTAIN NUMBER OF CIRCULATING .. OF S'MPLE: 4 HRS TE*PERATURE: 39 F. STATUSB 0FF PUMPS IN OPERATIONE 4 SAMPLE COUNT 23257 SAMPLE WEIGHT 617.0 LRS f

• 0DAL

( . SPECIES DAME SPECIES 8 HR SPECIES 8 MR WAXIMOM MODAL TOTAL MEIGHTtLBS) TOTAL COUNT LENGTHtW4) LENGT H i*tdl e 1 WEIGHTIGR) e 4 THOEsoFIN eM4D GR2.R1 23100. 155 90 TC 120 9e 931 5 TO 10 49 479 .( ' GIZZARD SHAD 1.34 53. 208 90 To l20 a 621 5 TC 10 6. 461 ~~ ~ SKIPJACK ErppINr. P<. 99 90. 445 120 TO EO 9 415 10 T0 15 4 ISS ~ GREEN SUNE15H. n.06 4 76 60 TO 90 1 1001 5 TO 10 1 1009 ~ ^ ~ CHANNEL CATFISH 0.02 4 68 60 TO 90 1 1005 0 TO 5 1 1001 ( RLUEGILL SUNEISH

1. 0 7._

4 179 150 TO 180 1 1001. 115 TO 120 1 1001 ( ~ ' I TbTAL SM dLE ET. 15Ci.UDEd ~ 55~i.~85 'Of 'O'EBRI'S ACCUMUL3 TION. ~ ~ ~ ~ ~ ~' ' ( ( ~ ~~ ( .... ~. -.. v ,4

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~( o h ARKINSAS POWE2 & LIGHT COMPANY ANO SCREEN MONITORING Tsu e 26 ( e o DIEL STUOY I ~ SAMPLE T AMEIE:. 01'-27-78.8A.M.[TO .4P.w. 8 HOUR. TOTAL.'.... 2 f ~ ~ r .. INCLUSIVE.11ME_..._ _. INLET. W ATERBOA..._. AIR. CURTAIN. NUMBER OF C1RCULATING. 6 Hour T0TAL.... _ OF SAMPt.Et A hrs TEMPER ATt1RE 8 43 F STATUS: OFF PUMPS IN CPERATION: 4 SAMPLE COUNTt 40187 SAMPLE tfEIGHTS 977.0 LBS (. S5ECIES N4 E SPECIES. 8 HR SPECIES 8 FR WAX 1puM NOD AL. MODAL E total. wEIGHTtL8S) TOTAL COUNT LENGTHfMMI LENGTH (MMI e t WEIGHTIGR)

• Y

( THREADEIN SHAf5 ^ ~ 106' 954 5 TO le 61 '551 451.35 40064 158 90 TO' 120 ( s. CIZZERD. SHAD 6.R4 65. 250 60 TO .90 3 30% 0 TO 5 4 401 ( p _..210 2 405 25 TO 30 2 401 SKIPJACK HERRING 11.72 33. 402 100 TO ( HISSISSIPPI SILVERSIDE. 0.12 20. 109 90 TO 120 2 671 0 TO 5 3 1001 ( UEF'N SilNU SH' ~ ~ 0.16 7. BR 60 TO 90 1' l'005' 5 TO 10' 1 1005 (

• TOTAL SAtFLE WT. INCLUDES 6.8 Ltis OF DEURIS ACCuputATION.

(' ( d... 4 .e_ a 4 .O. a w= i. .6- -e.e. e. .gi.i. g e. e 6 -.-e 7 e -~'-

• * * ~ * *
  • "~

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f. ;. -

(* 2. U' ...+..... _... _... _ _ 1. .....+ M . + _ _. - - -'

.t ARKiNS AS C'.'ER. 4, LIGHT COMPANY 'i-ANO SCTEEN MONITORING .:( > o 2mb1*) 17 UIEL STUOY ( ^ - % AMPLE TAMEhr 01-77-7i 4.p.u. TO 120.u. _, 'INCt.uSIVE TIME-. . INLET 4.aTEpson. AIR CURTAIN,NUMHt[P OF CIRCULATING e H00R. TOTAL' 8 HOUR TOTAL

• f OF SAWelEt 9' HRS TE**pERATORE 42 F STATUS 3 0FF PUMPS IN OPERATION: 4 SAMPLE COUNT: 47217 SAMPLE WEIGHT: 1111.0 L95

.(, SPECIES Navr 9PECIES e do SPECIES' H PR MAXIMUM MOCAL' MODAL total 4.IGHT(LH9) TOTAL COUNT LENGTH (MM) LENGTH (Mw) s S WEIGHT (GR) e .( THIEa0FirJ %Han 1p77 21 . 47121. 147 90 TC 120 104 92% 5 TO 10 64 579 ~ 2( GI77aQD'sHA0 5.93 44 2P9 210 TC 240 3 501 0 TO 5 2 '339 - ( FT.E Sww a T Ep noou P.43 30. 359 90 TC 120 3 759 10 TO 15 2 509 .( h4EEN SbNFISH 0.65 15. I?9 60 TC 90 1 501 ~5 TO 10 1 " 509 ( ~ 'vtHI TE ' Cli 4pP 1E 1 99 7. 218 ~ 2Y6 TO 260' 1 '1001 ~ ~ ~120 TO 125 l 3001 ~^ .( I TOTAL' SAMPLE wT. INCLUDE'S 16.8 Ld5 0F' DE6RIS ACCUMULATION. ~ .( e e s 4_ ^^ i i -( /, ... 1. 5 C. l '~ .bh(

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(- 'LPMANSAS PPJ:ER A LIGHT COMPINY o .tNG SCREEN MONITORING o Tab h 18 ,( o a.~..-.. ~... O!EL STUDY I .5AMPLTa*EN: 11-28-76'120'.M...TO. 84.M. E ( . I NCt,US I VF. T I ME_.. _. INLET W ATERBQ4 . AIR CURTAIN NUMBER OF CIRCULATING. e H_00R TOTAL 8' HOUR TOTAL i Or SAMPLE! 9 HRS TEMPERATURE: 41 F STATUS: OFF PUMPS IN OPERATION 4 SAMPLE COUNT! 8%896 SAMPLE WEIGHT 1928.0 LPS f ..$PECIES N4W ...... SPECIES _ N HR.. SPECIES 8 HR . MAX.IMUM M00 AL.. MODAL 1 TOT AL WEIGHT.f LtsSI TCTat COUNT LENGTH (MM) LENGTH (MMI s .t WEIGHT (GRI e S I. THREA0rINSHA0 1401.s9 84858. 154 90 TO 12'O 107 929 5 To '10 68 599 . i I CHANNEL CATFISH 0 08 13. 70 60 TO ~~90 1 '1d01 0' TO ~ S 1 1001 ~ j SKIPJACN ' ERRING' O.28 13. 115 90 TC 120 1 '1005 5 TO 10 1 1007 H '( GIZTAAD SNA0 1.67...... .210 1....1005 55 TO 60 1 1009 13. 205 180 TO L ~ * ~ ~ ~ ~ T0TAL'SAMPL5 Wf.INCIUDES 24.5 LBS OF DEBRIS ACCU'MULATION. ~ ~ ( ( ( ( ( s C = m +- .e .w..+.. .m_ _..~ .w 4 - *.. .e. .:.-e m .e. ._w,. %m t. .c..=. :qj p. w..w e m,;.,,. g.y;;;n.., n.u.. ,1, p m,; _..- - ;y y.- .;.m,y.g,. p., w., e 9p rs% ,g.,./ - q c , ; e.g. ,,;, g. 3.t; g , m y ( , c. -:,~. s:q. -w .o.... , _-.q:4 ; 9..

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ARKANSAS POWE3 & LIGHT COMPANY ANO SCREEN NONITORING ( e TahD 20 -( DIEL STUDY SAMPLE TA*ENI.. 02-10-76 4P.v.. 70.12p.4 ~ ( ._. INCLUSIVE TIMIL. INLET WATER 80/.... _ AIR _ CURTAIN OF SAMPL E S A HR$ 1FMPERATURE 44 F STATUS: OFF PUMPS IN OPERATIONS 4 SAMPLE COUNT! 11686 SAMPLE WEIGHT 303.0 LBS NUMBER OF CIRCULATING. 8 MOUR TOTAL -( 8.N00R 10 tat _?... SPECIE'S NA N. SPECIES' O 'R M TOTAL MEIGHTtL M) . SPECIES 8 HR f max! MUM McCALL ~ko0AL' TOTAL count LENGTH (MM) THREADFIN SHAQ 'ph0'. 0 D LE A G T.H. (MMI 5 WEIGHT (GR) s 4 11661. 165 ( 90 TO 120 98 '92% ' S' T O ~ 10 52 491 CHk d [L CATrgsd '.3 55 6. 465 30 TO ~ -( 60 1 33% ~ 0 TO 5 2 679 MISSISSIPPI $1LvEastnE

0. d 4' 4

( 91 60 TO ' 90 1 509 0 TO S' 2 1009 'GIZ ARD 5 40

1. 3'9' 14

~ -( 222 60 To "90 2 29i U 5 TO 10 2 299 TOTA'L' S MPLF 'wf. 'TNCLUDE'S h.0 LBs OF DEBRIS ACCUMUU TION. ( i e w m e aae. e_ 2 e p C e m es y w. e J Em-M'- ee.w. es {

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-(. .....e .=_ g g .a Y m.- m,, A...* ?.. R: [^$ 3..j,\\ Wt _'..t i a(4 i. .. ~ _. qc, fh;..e 4 - a.,. 9. - ( i._ c. ,fc.' ? f-f u ".2 J.:. ~~ _,h5y. g' :". = y .,, Yr;, y.y. Qz y';g y. g s,)' =.-..- _...j._. n. ,,_.ggg, .[Ljf ' [g.,p.g7 .t.Q' 3[ K,_

ARKANSAS P0wE3 L LIGHT COMPANY (. (NO SCREEN MONITORING gg .[ DIEL STUOY ( SAMPLE TAKEN:.02-11-76 120.w. TO '8A.M. 8 HOUR IOTAL

• INCLUSIVE TIMF_._.

INLET.WATEPBOX. . AIR CURTAIN NUMBER OF. CIRCULATING e NOUR.TQIAL '( OF Sr.mpi.Es a HRS TEMPERATUDE 44 F STATUS: OFF PUMPS IN OPERATIONt'4 SAMPLE COUNT 8328 SAMPLE WEIGHT: 211.1 LBS i SPECIES NAU. SPEh1ES d HR SPECIES e HR MAXIMUM. M00AL MODAL ( TOTAL wEIGHTtL85) TOTAL COUNT LENGTHtwM) LENGTHtMM)

• WEIGHTIGR) 9 THREAprIN SHAD 193.97 8289.

159 90 Td 120 '96 89% 5 TO 10 63 589 G177ARD Sri 40 0.77 17. 228 60 TO 90 7 58% 0 TO 5 7 501 ( dUECATFISH ~ p.15 7. 204 90 TO 120 2 40% 5 70 10 2 401 -( SK DJACK HERGING 0.23 3. .212 120 TU 150 ' '15 TO 20 1 i501 I' 1 50% ( i CHANNEL CATFISH 0.01 3. .. 90 2 100% . 0 TO 5 2 loot _ \\ 68 60 TO ( i MISSISSIPPE SILVERSIDE 0.15 8. .114 90 TO' 120 6 1001 0 TO 5 3 50% ( FT.ESHw*TER DRIAM 0 04 1. 113 90 TO 120 1 1001 10 TO 15 1 1001 ( 9 TuiAL. SAMPLE.WT. INCLUDES 15.7 LBS OF DEBRIS ACCUMULATION. ( .L ,( t .(

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ARMANS",S PO!Ef? % l.!GHT COMPANY LNO SCREEN MONITORING o Tablo 22 O . (.

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DIEL STUDY ( S*MPLE TAMEN: I62-p.-7h_3A.u.. T o ' 6p. **. 8_H._0VR.TCT AL _* ~ f .. INCLUS IVF TIME..._. INLET _ WATER 90x, AIR CVRTAIN. NU.MBER OF CIRCULAT.ING .e, HOUR TOTAL .._. SAMPLE WEIGHT _.6.5 LBS OF SI."PI.E A HRS TEMPERATURE 50 F STATUS 8 0FF PUMPS IN OPERATION: 4 SAMPLE COUNT: 242 - ( SPECI E NAuE, SPECIES H HO SPECIES P HR max! MUM N00AL ' MODAL 1 ( 70.TAL wEIGHTfL99) TOTAL COUNT LENGTH (PH) LENGTHtMMI e 1 WEIGHTtGR) GIZZARD SiAD ~~ 0 59 20. 213 60 TO 90 11 55% 0 TO 5-9 459 t . 120 2 _. 5 10 10 2 1001 'STDIPE0 HASS 0 03 2. 98 90 TO 1005 ( 'CHA7&4FL CATFISH ^ 0.32 2. 2A9 60 TO '90 1 50% 0 TO 5 1 501 ( ALHF CAT 8'IS" 0 05 5. 106 90 TC 120 4 80% 0 io 5 '3 ' 601 ~ ( ~~"tHITE C'RA Ik ~ ' ' ~ '.' 0 4' ' '3. 9 85 90 TO 'O0 2' 675 ~5 TO 10' ~~ ' " 6'79 0 2 ( .'.FEESHHTER'5RUk -._[. i 0 09 4 121 90 TO.[120 2 ' 05 10 TO 15' 2 '551 5 ' ( 23 .855 . 5 TO. 10

16... _..595 THRECDFIN THAn 5.38 206.

153 90 TO.120 (

• TOTAL SAMPLE.WT..INCLUb'S.0.6 LB0F DEBRIS ACCUMULATION.

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_ _ _ _ _, - _ _ _ -. - -, - " " - - ~ " ' ' LRKcNSAS PO::ER t. LIGHT COMPANY (NO SCREEN MONITORING o Tablo 24 . - _ -. ~. 0 ,( DIEL STUDY '( .'%45plE. T MEN'r_52-ES-76. ! 2' P.M. _..I Of 8 4. M. f . INCLUSIVE. T IME___ _INLEJ W ATERSO.X_. . AIR CURTalN.huMBER OF CIRCULAT]NG _ e MOUR TOTAL . 8 HOU.R. TOTAL.? 0F SAMolEs.9 H95 TEMPERATHRE: 59 F STATUSt OFF PUMPS It4 OPERAT10N 4 SaMPt.E COUNT : 382 SAMRLE WEIGHis 8.9 LRS [SPkCIES NWE SOEC{ES d ',_HQ ( . TOT AL wElGHTJLAsl. SPECIES A HR MAXIuuM MOCat ' M00AL TOTAL COUNT LENGTH (MM) LENGTHfMMI s 4 WElGHTfGR) t I ~ 'I~HRFADFIN SHAO' ~ '5U 3 ~ 223. 155 90 TO ~120 22 815 ~ 5 TO 10 15 561 CtIANNEL CATFI9" ( O.07 9 103 60 TO ~ 90 7 782 0 TO 5 7 781 .....CHESTNtsT Lau'coEY ~ O '- 5 2. 295 270 TO ~300 2 1005 60 TO 65 'l 507 '4!SSISSIPAI. S ILVEo.5[nE ' O.' 0 'l' -(. 2. 94 60.TO. 90 1 50% 0 TO' 5 '2 1004 'dEUE CATf'iH ~ ~ ~'.55 ( l l 82. 120 '55 TO ~ '2 0 17 651 0 TO 5' 1 '6 629 1 GREEN StEFISH ~ $' O.01 ( 1. 48 30 TO _60 1 100% .0 TO 5 1 1001 ARKANSAS RIVER SHINER ( 0 09 7. 101 94 TO *120 5 715 5 TO 10 5 719 .4HITF CRAPPIE ( 0.l1 2. 130 120 TO.150 2 100s 15 TO 21 1 507 ( HLACK RulLwrAD CATFISH. _...... _. 0 12 1. 180 150 TO...180 1 1005 50 TO 55 1 1001 -~ ( .HLUFGILL.SUNF.ISH. D. 01. 1. 58 _._.30 T0 _60 1.100% O.TO .n 5 1 1001 GIZZARD SHAD 1.34 25. 745 60 TO 90 14 56S 0 TO 5 15 604 ~ .. ( ...ERESHWATER DRUM..... ...._ c.Sa_ 27. 130 ._90.TO .120 15 565 5 _T O. _10._ 14. 529 'l

• TOTAL S4MPLE WT. INCLU0CS 0.0 LBS OF DEBplS ACCUMULATION.

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ARK ANS AS POER & LIGHT COMPANY .t ANO SCREEN WONITORING o Tab b 25 ..). DIEL STUDY - - ~ - . SAMPLE,JAmFN: 0 3 7d-8A.w. TO 4P.M, ..INC1.USlyE T!"E. INLET 4TE000K AIR CURTAIN OF samples a H95 TWPERATnRE: St F STATUSt OFF NUMRt:.R OF CIRCUL.A TING.. e.HO,UR TOTAL ,'8 NOUR TOTAllt,, __, ( PUMPS IN OPERATION: 4 SAMPLE COUNT: All S AMPLE WEIGHT 8 ' 194.9 LPS ..%PECTE% W F SDfCIE9 8 MR SOECIES se HR MAXIMUM M c C At. 707.1L '* FIGHT tLes) TCTAL COUNT LENGTHip%) LENGTHtM>l a MUDAL ~ t WEIGHT (GR) a 9 ( THDEADFIN SHAD 4.71' 239 147 90 TC 120 46 885 5 TO 10' 3I '711 ......GIZ7ARO swAD' ' 16.16 147 228' 180 TC Il0 la 359 ~ 0 TO 5 7 139 FRESHWATEW ORH" n.15 10. 155 90 TO 120 5 639 10 TO 15 ~5 639 ~ 60LnEN SHINFu ~ 0 03 4 As' '60' TC ~90 3 1001 'O TO ~ 3 '3'~1009 ~ STPIDEO RASS ,..( 0 03 1. 102 '9'O TC 120 1 1005 5 TO '10 1 1001 2 SKIPJACK HEODINC- ._0.91 1. 295 _ 270.TC.300 1 1005 315 TO 32.0 1_1001 ( RIVE 37 SFf!NER ( 0 09 6. In7 90 TC 120 3 .._.609 ..5 TO. _................. _ 10 3 Ec9 3 MISSISSIPPI SILvrJSI'E ,( 0 01 1. 108 90 TC _120 1 .1007 o TO 5 .. 1007 1

• TOTAL SAMPLE
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5. To 10 5

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TWO-WAY ANALYSIS OF VARIANCE (ONE OBS. PER CELL) (WEIGHT) TABLE 31 DATE OF SAMPLE T]ME OF DAY NOVEMBER DECEMBER JANUARY 3 4 18 2 36 20 27 10 24 10 17 FEBRUARY MARCH BAM - 4PM .6 2.1 41 9 57.6 458.7 970.2 182.6 6.5 22.2 11.5 kPM - 12MN 15 8.5 44.1 81.1 610 3 1094.2 295.0 13 7 49 0 33.8 12MN - 8AM 19 8.8 43.1 45.6 499 9 1093.5 195.4 8.9 36.7 21.2 RESULTS OF ANALYSIS SSA = 5.12 (2) 803 = 4.72 (4) SSE = 4.84 (3) A = 2.56 (2) B = 5.25 (3) SST = 5 26 (4) k-1 = 2.00 n-1 = 9 00 (k-1)(n-1)=18.00 nk-1 =29 00 C = 2.69 (2) FA = 95 - F-ratio for time of day. Not significant at the.95 confidence level FB = 19 53 - F-rttio for different dates. Significant at the.95 confidence level (Percentage points of the F-distribution given in Appendix II) (H) = 10n

T'.?o-WAY ANALYSIS OF VARIANCE (oNE OBS. PER CELL)_ (NUMBER OF FISH): TABLE 32 DATE OF SAMPLE TDE OF DAY NOVEMBER DECEMBER JANUARY FEBRUARY MARCH 4 18 2 16 20 27 10 24 10 17 8AM - 4PM 26 143 2066 2310 18956. 4o187 7831 242 411 277 4PM - 12MN 94 496 -3019 3409 23257 47217 n686 536 1362 lo72 12MN - 8AM 111 675 3412 1916 20358 84896 8328 382 653 ~ 6n. RESULTS OF ANALYSIS SSA = 1.21 (6) B= 8.41 (2) n-1 = 9 00 nk-1 = 29 00 A = 6.05 (5) SSB = 8.73 (16) SST = 9.% (16) (k-1)(n-1) = 13 00 k-1 = 2.00 C = 5.87 (5) SSE = 1.06 FA = 1.03 - F-ratio for time of day. Not significant at the.90 confidence level. FB =16.62 - F-rativ for different dates. Significant at the.90 confidence level. (Percentage points of the F-Distribution given in Appendix II) (N) = lo"

DTo-WAY MIALYSIS OF VARIMICE (oIZ oBS. PER CELL) (WEIGHT) TABLE 33 DATE OF SAMPLE IIG7EIGER DECDBER JAITUARY FEBRUARY MARCH TIIE CF DAY 4 18 2 16 20 27 lo 24 lo 17 8AM - 4B! .6 2.1 41 9 57.6. 458.7 970.2 182.6 6.5 22.2 11 5 hat - 12It! 15 8.5 44.1. 81.1 610 3 1 295.o' 13.7 49 0 33.8 RESULTS OF ANALYSIS SS = 1.89 (2) B= 8.41 (2) A n-1 = 9 00 nk-1 = 19 00 B= 7 57 (3) A== 1.89 (2) SS SST =1.24(4) (k-1)(n-1) = 9 00 k-1 = 1.00 C= 5.21 (2) SS = 4.69 (3) E FA = 1 36 FB = 1.61 (Percentage points of the F-Distribution given in Appendix II) (N) = lo"

- ~ ~ -. ~ ~ TWo-WAY ANALYSIS OF VARIAUCE (OUE oBS. PER CELL) (WEIGHT) TABLE 34 DATE OF SAMPLE NOVEMBER DECEMBER JANUARY FEBRUARY MARCH TDtE OF DAY 4 18 2-16 20 27 10 24 10' 17 8AM -' 4PM .6 2.1-41 9 57.6 458.7 970.2 182.6 v.5* 22.2 11.5 l2ter - 8AM 19 8.8 43.1 45.6' 499 9 1903 5 195.4-8.9 36.7 21.2 RESULTS OF ANALYSIS SSg = 5.n (2) > B =. 4.05'(3) 7= 4.o9 (4) n-1 = 9 00 SS 3= 3.65 (4) A = 5.n (2) SS c = 4.28 (2) (k-1)(n-1) = 9 00 k-1 = 1.00 nk-1 = 19 00 SSE = 3.85 (3) FA = 1.19 FB = 9 47 (Percentage points of the F-Distribution given in Appendix II) j n (N) = lo so.

3- 'r.70-:TAY ANALYSIS OF VARIANCE (ONE OBS. PER CELL) (WEIGHT) -TABLE 35 DATE OF SAMPLE NOVDSFR DECDGER JANUARY FEBRUARY PARCH - TIME 0F DAY 4 '18' 2 16 20 27 10 24 10 17 kPM.121st-1 51 8.5 44.1 -81.1 610. 1094.2- .295.0 13.7 49.0 33.8 12tei ' 8AM 19 8.8 43.1 45.6 499 9 1903 5, 195.4. 8.9 36.7-21.2 RESULTS OF ANALYSIS SSA = 1.42.(2) B= 4.44 (3) n-1 = 9 00 nk-1 = 19 00 A'= 1.42 (2) SS ~ B= 4.00 (4) SST = 4.34 (4) (k-1) (n-1) = 9 00 k-1 = 1.00 C= 3.61 (2) SSE = 3 25 (3) FA =- 39 FB = 12 30 (Percentage points of the F-Distribution given in Appendix II) -(N) = 10n

t-t APPENDDC I TWO-WAY ANALYSIS OF VARIANCE (One Observation Per Cell) THE ANALYSIS OF VARIANCE TABLE FOR THE OBSERVATIONS: xij i = 1, 2,.. k j = 1, 2,..., n Shere k = number of. rows and n = number of columns is given below; 1 1 k and x.. = 1 gg Uith x1, ' = 7 $n x1,j, X.3 = 7 g x nk ij ij 3,1 i-1 ij DEGREES OF MEAN SOURCE OF VARIATION SUM OF SQUARES FREEDOM SQUARE F A*D (*i* -x..) k-1 A=k-1 BENEEN ROWS SS FA*A e (Time of Day) I (x -x..)2 n-1 B= FB " 3-BETWEEN COLUMNS SSB=k d n-1 C (DifferentDates). SS (x e iJ 1,,x. (k-1)(n-1) C-ERROR _ ss -x = (k-1)(n-1) TOTAL SS (*ij -x..) nk-1 t=

APPENDDC II Table 4: Percentage Points of the F-Distribution (a =.05) s', = numerator d. f.: p,= denominator d. f. 1 2 3 4 5 6 7 8 9 to 12 15 2n 24 30 40 no 120 en I 1811.4 199.5 235.7 224.6 230.2 234.0 236.H 238.9 240.5 2:1.9 243,9 245.9 e t M.o 219.1 25o.1 251.1 2512 23:t.3 258.3 I 2 IM.51 19.tMJ

19. l ei 19.25 19.30 19.33 19.35 19.37 19.38 19.40 19.41 19.43 19.45 19.45 19,46 19.47 19.4 g 39,49 3 9,5n 2

3 19.13 9.55 9.2H 9.12 9.01 8.94 8.89 8.85 8.81 s 79 8.74 g.7o g,66 8.64 M 6g g,59 g.57 g,53 g,53 3 4 7.71 6.94 6.59 fi.39 6.26 6.16 0.09 6.04 6.00 5.94; 5.91 5.H6 5.80 5.77 5.75 5.72 5.69 5.66 5.03 4 5 6.61 5.79 5.41 5.19 5.05 4.05 4.88 4.82 4.77 4.74 4.f18 4.62 4.56 4.53 4.50 4.4(i 4.43 4.40 4.' i; 5.99 5 14 4.76 4.53 4.39 4.28 4.21 4.15 4.10 4,sw; 4.t w a 3.94 3.M7, 3.M 3.g l 3.77 3,73 3,7o 3, s,, 7 5.59 4.74 4.35 4.12 3.97 3.M7 3.79 3.73 3.6N 3.68 3.57 3.51 3.43' 3.41 3.3M 3.34 3.30 3,27

3. 3 7

2 g 5.32 4.46 4.07 3.N4 3.f.9 3.5H 3.50 3.44 3.39 3.35 3.28 3.22 3.15 3.12 3.0H 3.04 3.01 2.97 2.93 x 9 5.12 4.26 3.H6 3.63 3.48 3.37 3.29 3.23 3.18 3.14 3.07 3.p l 2.98 2.90 1 86 2.H3 2.79 2.75 2.71 9 to 4.lHi 4.10 3.71 3.4 M 3.33 3.22 3.14 3.07 3.02 2.9M 2.91 2.M5 177 2.74 2.70 2.vi6 2.62 15M 2,54 In ll 4.M4 3.9M 3.59 3.36 3.20 3.09 3.01 2.95 2.90 2.85 2.79 2.72 1 65 2.61 2.57 2.53 2.49 2.$5 2.40 ll 82 4.75 3.M9 3.49 3.2fi 3.11 3.(Mt 2.91 2.M5 2.80 2.75 2.69 1 62 2.51 2.51 2.37 1:3 2.sw 2,33 2.,in 32 I s.7 3 %I 3 II

3. l M 3.03 192 2.M3 177 171 1 67 1 60 2.7.3 J.in 1 12 2.3M 2.33 13o 2,27.

2.28 la il s e.o 171

• l.31 3.11 itHi 1M5 2.76 2.70 1 65 ano g.53 2.46 2.39 135 2.31 2.27 2.22

2. l M 2.13 14 15 4.54 3.68

• l.29 3.on 2,90 2.79 2.71 2.64 2.50 2.53 14M 2.4o 2.13 2.29 2.25 2.2n 1 16 2,il in7 la su

.l. s n 3.63 3.24 3.n l 2.M5 2.74 2. 6 15 2.59 2.54 1 39 12 1 33 124 133 1 39 g.q5 mg g gew; tog g e, 37 4 15 37.9 3.On 2.1Hi 1M1 17H 2.'il 2.55 2.49 1 85 13v 2.:11 1 23 2.19 2.15

2. l u 2.s ui 2.u l 1.96 17 lx 4.4 l

3. *.5 3.16 1 93 2.77 166 2.5H 15I 2.46 1 81 138 1 27 2.19 2.15 1ll 1 06 2.02 I.97 f.92 l es in

. 34 3 52 3.13 2.1Hi 2.75 2.63 151 2 <l M 2.42 2.3M 13I 123 1 16 til tu7 Lua 1.9 % 3.93 3.nn 39 go 3.35 3.11. 3.lu 1M7 2.78 16" 2.51 145 2 39 2.35 12M 2.29 112 10M 2.n l 1.99 1.95 1.90 1,81 20 21 4.32 3.47 3.07 2.84 2.68 2.57 2.49 2.42 2.37 g.32 g.25 g,l g glo 105 2.01 1.96 1.92 1,87 1.H I et 22 4.30 3.44 3.05 2.R2 2.66 155 2.46 2.40 2.34 g,3o 1 23 g, g n to7 to3 g,93 g,9 3 g,gg 3,g g g,73 gg 23 4.28 2.43 3.03 1 80 2.64 2.53 2.44 2.37 2.32 127 g,2n g, g 3 2.o3 g,n l g,qu; g,9 g,un i gg g,7 23 4 26 3.4n 3.u 1 178 2.62 1 51 2.42 2.30 2.30 1 25 11M til 2 n3 3.9M g,9 3 1.x9 3,H 3 3,79 g,73 23 25 8 21 3 39 199 176 1 60 149 140 138 12M 128 ilu 1 09 2.u 8 l.tni 1.92 1 H7 8.M2 l.7 7 1.73 25 26 4.23 3.37 2.9M 2.74 2.59 2.47 2.39 2.32 2.27 122 15 1o7 i,99 g,93 g,tu s g,x3 i,go g,73 g,n3 2,, 27 4.21 3.35 2.!Hi 2.73 2.57 2. 4 83 2.37 2.31 2.25 2.2H 113 2.06 1.97 1.93 1.MM l.M i 1.79 I.73 1.67

7 2M 4.20 3.38 2.95 2.71 2.56 2.45 2.36 2.29 2.24 2.19 112 Los 1.tHi 1.91 1.M7 1.82 l.77 1.7 ;

i.65 2M 29 4.1 H 3.33 2.93 2.7o 2.55 2.43 2.35 2.28 2.22 2, j g Lio 2,o3 1,93 I,9o I,x3 g,x 3,73 g,7n g,n g 2o ao 4.17 3.32 1 92 2.69 2.53 2.42 2.33 2.27 2.21 g, g n 2,og g ng i 93 i,39 1,g g i,79 r,7

nM g,n.;

n, to 4.0%

3.23 2 Mt 2.61 2.45 2.34 2.25 LlH 2.32 tom, itHe 1.92 1.M 1 1.79 3.71 1 69 f 63 1,5M l.51 .i n I no 4.t M e 3.15 2.76 2.53 2.37 125 2.17 ilu 2.04 g,99 g 92 3.g 3,73 g,7 o 3,n., g,59 g,53 g,g7 g,39 cn 12n 3.92 3.07 2.6M 2.45 2.29 2.17 2.09 2.02 1.96 3,93 g,x3 g,73 g,nn 3,n g g,33 g,3n g,.3 3 g,33 g,23 32o l 3.M 4 3.f M P 2.00 2.37 2.21 2.10 2.H I l.94 I.N8 1.H3 1.75 1.67 l..~.7 f.52

1. Di 1.39

1. 3 -'

l.22 I nu j l l l l F.om **Tahlr=..I l*rrr. hi nw. l'ome = of t ia. I nu s tv.I Ilan ( F) I hat nhnt ion." ifiume triin. ( Vol. 33 (19 8:1) pp. 73 p.1 y Alausp-SIrrrington aml (*utlwrism St. Thoml mon. Itepro. j .in. 4 4 3.y perme+i..n of l'e nt. -e l: N. I'. on.on an.1 t ip. liinm.triin Trn* bra. Photocopied frcm " Introduction to Linear Models and the Design and Analysis of Experiments", William Mendenhall (1968)

~ i APPENDIX II Cont. of the F-Distribution (a =.10) Table 3: Percentage Points r,== numerotor d. f.; f*.= denominator d. f. h/ 10 12 15 20 28 30 4n 60 120 m / r 1 2 3 4 5 ft 7 8 9 r. 60.39 6".75 61.22 811.7 8 6100 6126 62.53 62.79 63.ini s.3.33 1 9.39 9 41 9.42 9.44 9.15 9.46 9.47 9.47 9.4M 9.49 2 1 39.M6 49.50 53.59 55.M3 57.28 SM.24 5H.91 59.44 59.86 5.23 5.22 5.20 5.18 5 lM 5.17 5.16 5.15

5. = 4 5,13 3

2 N.53 9.f >9 9.16 9.24 9.29 9.33 9.35 9.37 9.38 3.92 3.90 3.M7 3.M 4 3.83 3.M2 3.go 3.79 3.79 3.76 8 3 5.54 5.46 5.39 5.38 5,31 5.28 5.27 5.25 5.24 3.30 3.27 3.24 3.21 3.19 3.17 3,16 - 3.14 3.12 3 In e. 4 4.54 4.32 4.19 4.11 4.05 4.01 3.98 3.95 3.94 198 2.90 2.M7 2.44 2.M2 2.HH 2.'i H 176 2.74 2 s. 5 4.06 3.78 3A2 3.52 3.45 3.40 ?.37 3.36 3.32 17H 1 67 1 63 1 59 2.5M 2 56 2.fe l 1 51 1 19 2.17 7 6 3.7 M 3.46 3.29 3.18 3.11 3.05 3.01 2.98 2.9f; 151 1 50 146 2.42 14H 13M 136 2.34 132 2.29 M .l 59 3 26 3_n7 11H1 2.MM 2.H3 17H 2.75 2.72 2.42 2.38 2.34 2.30 2.28 2.25 2.23 2.21 2.l M 2.16 9

== 3.86

3. l l 2.92 2.M I 2.73 2A7 242 2.50 2.56 2.32 128 121 1 20 2.18 116 2.13 2.11 1 08 2.of; lo 9

3.36 3.01 2.MI 2.69 2.61 2.55 2.51 2.47 2.44 125 121 2.37 2.12 liu 108 2.us tan inne 1,97 il in 3.39 192 173 2Al 2.52 146 1 41 2.38 2.35 1 89 2.35 130 1eu; 148 int I 99 l.tu; I,93 1,que lg ll 3 23 1M6 166 2.54 2.45 1 39 2..J i 2.30 2.27 til ilu 1HS 2 HI l.91 1 94 19:1 19n 1.MM 1.M:. 13 12 a lM 2 MI 2 61 11H 139 133 12H 2.21 2.21 13" 1"3 1"I 1.tHi 1.9 % l.91 1.M9 l.M6 1.M3 1.Mu Ii I:1

l l i S 7ti 2 :.si 18:1 133 128 123 12u 2.16 1'"3 1 02 1.97 1.92 1.9u 1.17 1.M5 1.M2 1,79 1,76 g;

II

l to 17:1 ES2 2.39 1 31 121 28'8 0.15 1 12 1h3 3.99 l.9 %

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