ML20236L631

Proposed Tech Specs,Reflecting Rev of Criticality Analyses & Rack Utilization Schemes for Regions 1 & 2 of Spent Fuel Racks as Described in STP UFSAR & TSs

ML20236L631
Person / Time
Site:	South Texas
Issue date:	07/07/1998
From:	HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20236L615	List: ML20236L617 ML20236L619 ML20236L626 ML20236L631 NOC-AE-000178, Application for Amends to Licenses NPF-76 & NPF-80, Reflecting Rev of Criticality Analyses & Rack Utilization Schemes for Regions 1 & 2 of Spent Fuel Racks as Described in STP UFSAR & TSs
References
NUDOCS 9807130098
Download: ML20236L631 (38)

Text

{{#Wiki_filter:f l ATTACHMENT 6 Pmposed Technical Specification Changes t I I i Attachinent 6 NOC-AE-00178 9007130098 980707 ADOCK 05000499 PDR PDR p i

'I REFUELING OPERATIONS 3/4.9.13 SPENT FUEL POOL MINIMUM BORON CONCENTRATION LIMITING CONDITION FOR OPERATION 3.9.13 The boron concentra+f an of the spent fuel pool water shall be maintained greater than or equal t ppa. 2 APPLICABILITY: Whenever on r more fuel assemblies are stored in the spent fuel pool racks. ACTION: a. With the requirements of the above specification not satisfied, immediately suspend all operations involving movement of fuel assembiles in the spent fuel storage pool and initiate action to restore the boron concentration in the spent fuel pool to greater than or equal to b. The provisions of Specification 3.0.3 are not applicable. SURVEILLANCE REQUIREMENTS l 4.9.13 The boron concentration of the spent fuel pool shall be determined by chemical analysis at least once per 7 days. 1 I SOUTH TEX?* Ut!! i t 1 1 ? 3/4 9-17 Unit 1 - Amendment No. 43 Unit 2 - Amendment No. 32

FM @G "W@ 11:1@ MT W sb5 6 8 LBMb 5 P@ 412 5/e SWll IU U131gWdMW1 P'. WJ REFUELING OPERATIONS BASES 3/4.9.12 FUEL HANDLING BUILDING EXHAUST AIR SYSTEM (Continued) Examples of onsite emergency power sources that satisfy this requirement are: In all MODES / CONDITIONS, (a) OPERABLE ESF diesel genierator for the associated 1 required components; IN MODES / CONDITIONS below MODE 4, (b) OPERABLE ESF diesel generator capable of supplying.the required components via cross tied trains, allowing one diesel generator to supply all required components, (c) an approved non-safety related diesel generator, capable of supplying the required filter train loads in conjunction with an ESF diesel. 3/4.9.13 SPENT FUEL P0OL MINIMUM BORON CONCENTRATION The r strictions n the boro concentration f the spent fuel ool ) ensures at the ra K is na ained less n or equal to O. in the event at one or reYu'ela oblies are i roperly loaded i he spent fuel poo storage ra s (with re ect to Spect cation 5.6). Si the presene of b on is ensur d, the rac will be intained less th or equal to.95 n the even of imprope caNng of f assemblies. T s boron conce ration is more t n adequate o ensure the limit of 0.9 specified in Specifi ton 5.6.1 .a. will not e vYolated under he following cenarios: 1 (1) in Reg n 1, any mis ading of Categor 1, 2, 3, and assemblies; ) (2) in egion 2, the isloading of on ategory 1 as ly into th nter of a fu y loaded checker oard area also containing C egory 1 assemblies; I

3) the misl ding of a Catego 1 assembly 1 a Region I r k adjace

] to a C egory I assembly n a Region 2 r ek. l This boron c centration limi is the value cessary to e ure that e 0.95 K,, limit r rack critica11 y will not be olated in t event of Category assembly droppe in the gap bet een the pool all and a Aegion 2 rack mo le. / f)tfC N A I l l SOUTH TEXAS - UNITS 1 & 2 8 3/4 9-4 Unit 1 - Amendment No. 4 M 9, 71 Unit 2 - Amendment No. Bh48, 60

l Insert 1 3/4.9.13 SPENT FUEL POOL MINIMUM BORON CONCENTRATION l The spent fuel racks have been analyzed in accordance with the methodology contained in l WCAP-14416-NP-A," Westinghouse Spent Fuel Rack Criticality Analysis Methodology", Revision 1, November,1996. This methodology ensures that the spent fuel rack multiplication factor, kerr is less than or equal to 0.95, as recommended by ANSI 57.2-1983 and the guidance contained in NRC Letter to All Power Reactor Licensees from B. K. Grimes,"OT Position for Review and Acceptance of Spent Fuel Storage and Handling Applications", April 14,1978. The codes, methods, and techniques contained in the methodology are used to satisfy this kerr criterion. The spent fuel storage racks are analyzed to allow storage of 17X17XL fuel assemblies with nominal enrichments up to 4.95 w/o U-235 utilizing credit for checkerboard configurations, burnup, Integral Fuel Burnable Absorbers, decay time, RCCAs, and soluble boron, to ensure that kerris maintained s 0.95, including uncertainties, tolerances, and accident conditions. In addition, the spent fuel pool kerr is maintained < l.0 including uncertainties and tolerances on a 95/95 basis without soluble boron. The inadvertent withdrawal of an RCCA from a required location in a Region 2 checkerboard is bounded by the misloading of a 4.95 w/o fuel assembly in the same l checkerboard pattern at the location of the assembly with the inadvertently withdrawn RCCA. I The soluble boron concentration required to maintain kerr s 0.95 under normal conditions is 700 ppm. ) Specifications 5.6.1.3 and 5.6.1.4 ensure that fuel assemblies are stored in the spent fuel racks in accordance with the configurations assumed in the spent fuel rack criticality analysis. The most limiting accident with respect to the storage configurations assumed in the spent fuel rack criticality analysis is the misplacement of a cominal 4.95 w/o U-235 fuel assembly into a storage cell location in the Region 2 RCCA checkerboard #2 storage arrangement. The amount of soluble boron required to maintain kerr less than or equal to 0.95 due to this fuel mistoad accident is 2200 ppm. The 2500 ppm limit specified in the LCO bounds the 2200 ppm required for a fuel misload accident. A spent fuel pool boron dilution analysis was performed to determine that sufficient time is available to detect and mitigate dilution of the spent fuel pool prior to exceeding the kerr design basis limit of 0.95. The spent fuel pool boron dilution analysis concluded that an inadvertent or unplanned event that would result in a dilution of the spent fuel pool boron concentration from 2500 ppm to 700 ppm is not a credible event. inn >pgs shpnt_rutdoc

DESIGN FFATURES 5.3 REACTOR CORE FUEL ASSEMBLIES 5.3.l The reactor core shall contain 193 fuel assemblies. Each fuel assembly shall consist of a matrix of zircaloy or ZIRLO clad fuel rods with an initial composition of natural or slightly enriched uranium dioxide as fuel material. Limited substituti'ons of zirconium alloy, ZIRLO or stainless steel filler rods for fuel rods, in accordance with HRC-approved applications of fuel rod i configurations, may be used. Fuel assemblies shall be limited to those fuel designs that have been analyzed with applicable NRC staff-approved codes and methods, and shown by tests or analyses to comply with all fuel safety design bases. A limited number of lead test assemblies that have not completed representative testing may be placed in non limiting core regions. l l CONTROL R00 ASSEMBLIES l 5.3.2 The core shall contain 57 full-length control rod assemblies. The full-length control rod assemblies shall contain a nominal 158.9 inches of absorber material. The absorber material within each assembly shall be silver-indium-cadmium or hafnium. Mixtures of hafnium and silver-indium-cadmium are not permitted within a bank. All control rods shall be clad with stainless steel tubing. 5.4 REACTOR COOLANT SYSTEM DESIGN PRESSURE AND TEMPERATURE 5.4.1 The Reactor Coolant system is designed and shall be maintained: a. In accordance with the Code requirements specified in Section 5.2. of the FSAR, with allowance for normal degradation pursuant to the applicable Surveillance Requirements, b. For a pressure of 2485 psig, and c. For a temperature of 650*F, except for the pressurizer which is 1 680*F. l VOLUME '5.4.2 The total water and steam volume of the Reactor Coolant System is between 13,364 and 13,914 cubic feet at a nominal T of 561*F. l m 5.5 METEOROLOGICAL TOWER LOCATION l 5.5.1 The meteorological towers shall be located as shown on Figure 5.1-1. l 5.6 FUEL STORAG_E 5.6.1 CRITICALITY 5.6.1.1 The spent fuel storage racks are designed and shall be maintained wNf: Unit 1 - Amendment No. 2r10,15,43, 6h65rB9,92 SOUTH TEXAS - UNITS 1 & 2 5-6 Unit 2 - Amendment No. 2,5,32,507 54rM, 79

( e k 4 Ji) r y, ygy:r m nts (A ~A L *$'k e e DESIGN FEATURES / !p'// pQuiy41e _ to/less th6n/orkuny'+./n A5Ah(n/ lod #dafid! ~ rarted eat rl "f: rc~'ir:=M shall be met by storing fuel in C. the spent fuel storage racks according to Specifications 5.6.1.3, 5.6.1.4, and 5.6.1.5. Additionally, credit may be taken for the presen.ce of soluble boron in the spent fuel pool water, per Specification 3.9.13, to mitigate the misloading of one or more fuel assemblie;, as described in Specification 5.6.1.6. ) A. A nominal 10'.'95 inches center to center distance between fuel ) assemblies in Region 1 of the storage racks and a nominal 9.15 inches center to center distance between fuel assemblies in Region 2 of the storage racks. s 'a n i a R 5.6.1.2 Prior to insertion into the spent fuel storage racks, each fuel I assembly shall be categorized by reactivity, as discussed below, or be designated as a Category I fuel assembly. All fuel enrichment values are initial nominal uranium-235 enrichments. The reactivity categories are: CATEGORY 1: Fuel in Category I shall have an initial nominal enrichment of less than or equal toJA w/o. --t _ _ _ _ _ N J f[wituunu a ue i Ca gor 2 al mee at 1 ast ne of he foi owin crit ria ) a xim m i tial nomi 1 en ichme t of 4 w/o or, / 2) a.ini um rnup as s wn o Figu e 5.6, or, 3 min mum umbe of W stin ouse Integr Fue Bur ble Abso erl pins as hown n Fi ure .6-2, raK of 1 ss an r eq 1 to i 1.4 5. ef 1 as mbly K all be b,ased on uni asse.bly figu ation (infi ite 'n be latera and ial ext t) i the j 1 c r acto core geome ry, sumi g unbo ated ter at 6 'F. l he FBA od r uire nts owq n F1 re 5.6 2 are bas on a nom'nal 1 BA ( t li.ar loa ing o 1.57 g-B / inch For igher FB lin r B'O oadi gs, t re ired umb e r duc by e rat o oi B er of IF A ro s per assemb y may,/i ch 1 ading ,ei adin to t e nom nal 1. 7 mg-reas CAT ORY fu in tegor 3 sha 1 hav the minimu asse ly urn sho on F gure 5 -3. f i ~ ATEGO (4: l Fuel fn Cate ry4;all ve t e min ~ mum a emb y bu nup s own o Fig re ,5.6-4. j l Data points for the curves presented in Figures 5.6-1 through 5.6-are presented ~in t. ables on the respective figures. Linear interpolate n between table values may be used for intermediate points. SOUTil TEXA5 - UNITS 1 & 2 5-7 Unit 1 - Amendment No. h43,61 Unit 2 - Amendment No. 32,50 U__________-_________----__-_

Insert 2 a. krr less than 1.0 when flooded with unborated water, which includes an allowance for uncertainties as described in WCAP-14416-NP-A. b. krr less than or e-qual to 0.95 when flooded with water borated to 700 ppm, which includes an allowance for uncertainties as described in WCAP-14416-NP-A. Insert 3 CATEGORY 2: Fuel in Category 2 shall meet at least one of the following criteria: 1) an initial nominal enrichment ofless than or equal to 4.85 w/o; or, 2) a minimum burnai as shown on Figure 5.6-1. CATEGORY 3: Fuel in Category 3 shall meet at least one of the following criteria: 1) an initial nominal enrichment of less than or equal to 3.55 w/o; or, 2) a minimum burnup as shown on Figure 5.6-2; or, 3) a minimum number of Integral Fuel Burnable Absorber (IFB A) pins, as shown on Figure 5.6-3. The IFB A pin requirements shown in Figure 5.6-3 are based on a nominal IFB A linear B' loading of 1.57 mg-B' / inch (1.0X). For higher IFBA loadings up to 2.35 mg-B' / inch (1.5X), the required number ofIFBA pins p/ inch loading A full length IFBA is 168 inc er assembly may be reduced by the ratio of the increased B loading to the nominal 1.57 mg-B' part length IFB A is greater than 120 inches long. CATEGORY 4: Fuel in Category 4 shall meet at least one of the following criteria: I 1) an initial nominal enrichment of less than or equal to 2.50 w/o; or, l 2) a minimum burnup as shown on Figure 5.6-4; or, 3) a minimum number ofIFBA pins, as shown on Figure 5.6-5. l l i \\hoppe6\\spntful doc

The IFB A pin requirements shown in Figure 5.6-5 are based on a nominal IFB A linear B' loading of 1.57 mg-B' / inch (1.0X). For higher IFBA loadings up to 2.35 mg-B' / inch (1.5X), er assembly may be reduced by the ratio of the increased B'" the required number of IFB A pins p/ inch loading A full length IFB A is 168 loading to the nominal 1.57 mg-B part length IFB A is greater than 120 inches long. CATEGORY 5: Fuel in Category 5 shall meet at least one of the following criteria: 1) an initial nominal enrichment of less than or equal to 1.70 w/o; or 2) a minimum burnup as shown on Figure 5.6-6. CATEGORY 6: Fuel in Category 6 shall meet at least one of the following criteria: 1) an initial nominal enrichment of less than or equal to 1.70 w/o; on 2) a minimum burnup as shown on Figure 5.6-7. CATEGORY 7: Fuel in Category 7 shall meet at least one of the following criteria: l 1) an initial nominal enrichment ofless than or equal to 1.65 w/o; or 2) a minimum burnup as shown on Figure 5.6-8. CATEGORY 8: l Fuel in Category 8 shall meet at least one of the following criteria: I 1) an initial nominal enrichment of less than or equal to 1.40 w/o; or 2) a minimum burnup as shown on Figure 5.6-9. CATEGORY 9: Fuel in Category 9 shall meet at least one of the following criteria: 1) an initial nominal enrichment ofless than or equal to 1.40 w/o; or 2) a minimum burnup as shown on Figure 5.6-10. t i%oppes\\spnt_ful doc I

l l CATEGORY 10: Fuel in Category 10 shall meet at least one of the following criteria: 1) an initial nominal enrichment of less than or equal to 1.40 w/o; or, l 2) a minimum burnup as shown on Figure 5.6-11. CATEGORY I 1: I Fuel in Category 11 shall meet at least one of the following criteria: 1 1) an initial nominal enrichment of less than or equal to 1.20 w/o; or, l 2) a minimum burnup and decay time since shutdown as shown on Figure 5.6-12. I Insert 4 The fuel in Region I shall be stored in accordance with Figures 5.6-13,5.6-15, and 5.6-16. Insert 5 ) The fuel in Region 2 shall be stored in accordance with Figures 5.6-14,5.6-17,5.6-18, and 5.6-19. Insert 6 Fuel storage patterns used within Region I shall comply with the interface requirements shown in Figures 5.6-15 and 5.6-16. Fuel storage patterns used within Region 2 shall comply with the interface requirements shown in Figures 5.6-17 through 5.6-19. At the interface between Region I and Region 2 one row of empty water cells shall be maintained between the Regions. The empty water cell row can be positioned in either Region. Non-633dc items can be stored in the empty water cells per the provisions of Specification 5.6.1.3. i:hppes\\spnt_ful doc l

( E eb & OUs ~ "1 he wJ k 5% e non 4,,,'j, 7 % p,,,,,,,, Selasse_st ud Sc e - ackj ace.J b a cell sl*<rn LF : p ce(Is a an -fk+ ryp u lt s iv e M e e $ h -< n o n - & cs,), ;L, % e v&.lun ks bee, yerjured F # DESIGN FEATURES 5.6.1.3 Region I racks may be used to store Category 1, 2, 3, :.d 4 fuel. l y n Empty water cells may be substituted for fuel assemblies in all cases. 2, S', 7, 6, 9 ^ ~ A II 5.6.1.4 Region 2 racks may be used to store Category 1, 2,p0, e..d 4' fuel. hfeh"$h$Ykikkhklkhbhoh/,

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..>[c~p N b b "j" [5. f", r,,,",*[,N:e s c</ r 5.6.1.5 Storage Configuration Interface Requirements h $$ $ $ $1 0 W ' N ' N' h.ItYraitobn Y/ ch.e j { Internal Lnterf aces /in ReAlon J Racks !heinteface et en a clos d pac d fu 1 s rage rea nR ion an a ch cker oard st rage area also i Reg on 1 shall e s ch at e ther. C teg ry 3 r 4 uel a semb ies n the hec erbo rd p tter ar arr >d i ot firs row f t e clo pa ed tora e ar a of fu ( as s own n Fi ure 5 6-5; r, l 2. at leas one row of empt wa r cel s se ara a e ose ack d f el s orag are and chec erbo rded tora e ar a. nter al I terf ces n Reo on 2 ack The nte face betw en a ose ack fuel sto ge rea Re on an a che ker oard d st rage ea i Re on 2 hall be ch at the : 1 ere is a c e ro caryover/ofater ting empt ce s om t e hec erboar are int the H rst row f th clo e p ke area with e rem ning ells of t e row fill d wi h Ca egor 4 sett lies as sh wn l in igure 5.6- ; or 2 a leas one mpty row o cel s s ara st ch cke card patte i rea a the clos pack d st rag are eai_n 1 lose acke Sto ace A,ea A.iacent to eai n 2 los pac d Are Th re e no str tio on ei rf ce b wee eg o clo pack stor ge ndad)cen clo pac ds ag are in e 2 a eas 1 SOUTH TEXAS - UNITS 1 & 2 5-8 Unit 1 - Amendment No. 43 Unit 2 - Amendment No. 32

DESIGN FEATURES eoiod Checkedoard Stotxfoe Area Addcent to Recid 2 interf e betwee checker rded storag rea in Region and any Region rack rage are shall be ch that eith : 1. the gion I c kerboard pa rn is carried the Region 1 b ndary, bu he last row the Region 1 undary leaves th ategory 1 uel assembly ositions vacant or, at le one row of pty water cell n either Region or Region 2 rac separate th egion.1 checker carded storage ar and the ion 2 rack s rage area. Reaion Checkboard orace Area Ad.iac t to Reaion 1 T interface be een a checkerbo ed storage area i egion 2 and y Region rack storag rea shall be su that at least one ow of empty w er cells in either R ion 1 or Region racks separate the egion 2 check carded storage a -a and the Region rack storage area If c ckerboarded stora areas in both Reg ns 1 and 2 are djacent, at east on row of empty wat cells in either Re on 1 or Region racks sha*.1 parate the check oarded storage are in the respec ve r:cks. of190 ft 5.6.1.6 The minimum boron concentration speci ied by Specification 3.9.13, " Spent Fuel Pool Minimum Boron Concentration"/ assures that the rack K,ff in Specification 5.6.1.1.a will not be violated urt t% fe!!ct rcemHet: limit Regi 1, any sloadin f Catego 1, 2, 3, d 4 assemb ~ s; 2. n Regio the mi oading o one Catego 1 assembly nto the center f a full oaded c kerboard a also con ining Cat ory 1 a.,emblies; 3. the misl ding of ategory I sembly in - egion I ck adjacent to a C egory 1 sembly in egion 2 ra 5.6.1.7 The new fuel storage racks are designed and shall be maintained with: A K,,, equivalent to less than or equal to 0.95 when flooded with a. unborated water and less than or equal to 0.98 when filled with aqueous foam moderation (low density water). This requirement shall be met by limitin 5.0 w/o or less. g the er fuel assembly nominal enrichments to ~' b. A nominal 21 inches center to center distan e between fuel assemblies. bouk k becon Cs ace b b e n

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DESIGN FEATURES i 5.6.1.8 The In-containment fu storage racks are designed and shall be maintained with: A K.,,ted water. equivalent t le.ss than or equal to 0.95 when flooded with a. unbora his requirement shall be met by satisfying at least one of the o11owing criteria: 1) a maximum nitial fuel assembly nominal enrichment to 4.5 w/o or less;.- _g g y j number of) tion of initial nominal assemblyt6sA1pgtpd'sps Integra 2) a mini as a func Absorber enrichment, as snown on rigur -/',oraK, of less than or l The fuel ass K ' shall e based on a equal to 1.484. unit assembly configuration (infinit$,in the lateral and axial l extent) in the reactor core geometry, assuming unborated water l at 68'F. 1 pm 56-20 requirementsshowninFigureJ'.p/ inch.TAire based on a The IFBA inear B" loading of 1.57 mg-B For higher j IFBA linear B}' loadings, the required number of IFBA nominal 1F per assembly may be reduced by the rgtio of the increased B loading to the nominal 1.57 mg-B / inch loading; or, l p i n i b. A nominal 16 inches center to center distance between fuel assemblies. l DRAINAGE 5.6.2 The spent fuel storage pool is designed and shall be maintained to prevent inadvertent draining of the pool below elevation 62 feet-6 inches. CAPACITY The spent fuel storage pool #'s designed and shall be maintained with a 1 5.6.3 storage capacity limited to no more than 1969 fuel assemblies. i SOUTH TEXAS - UNITS 1 & 2 5-9a Unit 1 - Amendment No.61 Unit 2 - Amendment No. 50

i 1 l Mi ' mum Burnup for Catego 2 Fuel l 6,0 i i f . __f b initial Enrichment Minimum Bumup ,/ _ k (w/o) (MWDMTU) D 5,000 y / 4,o a 2 2,700 / C 5.0 5,400 3 4,000 s \\ Q. 3,000 y ( 2,000

Accepfable UNACCEPTABLE

~ .O E q) u) ... ) f f f I t initial Enrichment (w\\of 4.4 4.s 4.s s.O 4.0 4.2 / Assemblies with an initial enrichment less than 4.0 w/o are ACCEPTABLE Figure.5.6-1 Sol' - M A1 - UNITS 1 & 2 5-10 Unit 1 - Amendment No. 3 Unit 2 - Amendment Nn. 3

4 l Minimu IFBA Content for Cate ry 2 Fuel 100 _ _ _. _ _ _f_. _ _ _ _ j l inn i m o m eoni.ni j e 90 m ., su % i ~ ~ ~ ) th 4.2 a .6 I 80 d' 8' i / ~ / CD 70 s.o ao [. LL C / \\ / 5 l / \\,/ ~ .Q 50 1 b b E ~ Acct $ table /E$ 7eTJfE57ETE a 30 .E \\- \\ .C 20 / -3 10 ( =-..y-. [ '.. ~. C_. ~ E..~ ~.[. _. ~_.~__ ' ~_~ $ 4.0 4.2 4.4 4.6 4.8 5.0 Initial Enrichment (w/o) Assemblies with an initial enrichment less than 4.0 w/o are ACCEPTABLE Figure 5.5-2 l SOUTH TEXAS - UNITS 1 & 2 5-11 Unit 1 - Amendment No. 43 Unit 2 - Amendment No. 32

Minimu Burnup for Cate ry 3 Fuel 20,000 t ~ ~ ~~ Initial E nt Minimum Bumuf (w/o) (MWD /MTU) ) 2.s 0 2 15,000 8' 3 / s.5 e 4.0 000 ~ 4.5 750 v 5.0 1, Q / \\ U 10,000 E a ~ Acc6ptable mu r M el m a rd =1E m \\~~~ ~/ / 3,000 m m g f' '... O .5 3.0 3 4.0 4.5 5.0 Initial Enrichment (w/o) Assemblies with an initial enrichment less than I.8 w/o are ACCEPTABLE Figure 5.6-3 SOUTH TEXAS - UNITS 1 3 2 5-12 Unit 1 - Amendment No. Unit 2 - Amendment No. 3

1 l l Mini m Burnup for Categ y 4 Fuel 45,000.. .g __ Enrichment Minimum Bumup [~~ ~ " ~ ~ ~ ~~/ (w/o) (MWD /MWU) 40,000 1.7 o [' ~. ~ ~ ^ 2.0 7,000

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O 5 14,500 h 35,000 } j- $000 l ~ 4.0 31 O 4.5 ,800 .y.. 3 30,000 5.0 000 1 i y. v Q. 25,@0 a C '*'~ $3 * ' ! Accesfable mitcrNeIel:mrdbsm f. y - 15,000 ,o E ~: ~ 8 10.20 / / s ul

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.x : 5,0 '. ' ' ' '.5 o' 1.5 2.0 2.5 3.0 3.5 4 4 5.0 Initial Enrichment (w/o i Assemb!!es with an initial enrichment less th i 1.7 w/o are ACCEPTABLE i i Figure 5.6-4 SOUTH TEXAS - UNITS 1 & 2 5-13 Unit 1 - Amendment t 43 Unit 2 - Amendment No. 32 E-----

i Region 1 Close Packed and Checkerboard Fuel Storage close-packed storage 1 Jl 11 ll ll 11 ll 1L \\ .."J ..+& . wA. 944.< 4: Ap.- IcGag

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i nkr y 1:M% (' ?%eg. %f_.f"2,.;2yg,g ?.f f,tr;f h np:p;r,. : psq4: %4 y 3 p%4 s 4 h. es sa,:: ? c a - + ~ ~ 5 ~ ie# -- ') 3 ~ %gE er's se zF +t ] e r t;e. bef $jfff fg g e / g ' 1 992 g s 4$d1 m-ll 11 11 ll 11 ll l II Y checkerboard storage T l Category 1 Fuel Assembly h Category 3 or 4 Fuel Assemt,1y i m a? : Category 2,3, or o Fw,I / teembly Figttre. 5, /-5 SOUTH TEXAS - UNITS 1 & 2 949 Unit 1 - Amendment No. 43 Unit 2 - Amendment No. 32 l E

I, Region 2 Close Packed and Checkerboard Fuel Storage ( close-packed storage i I i i i l MyA"MMMV/ffAM EMMMFAF#AM I F" V V_it x U l l T ' checkerboard storage h Category 4 Fuel Assembly Category 1,2,or 3 Fuel Assembly Water Ceu Figure 5.6-6 SOUTH TEXAS - UNITS 1 & 2 5-15 Uni *, 1 - Amendment

o. 43

!! nit 2 - Amendment . 32

Minimum Burnup for Category 2 Fuel Region 2 250 I l i i I i l l l l _-_a _ _ ; __ __. 1_;l _,j__ i t Initial Minimum l l l l l ~ ~ ~ Enrichment Bumup ~~ ~ ~ ~ ~ { ~ ] '~~

• -]

{- (w/o) (MWD /MTU) 4.85 0 ~ T-(( ! j j j l 200 4.90 75 l l 4.95 151 _ _ w ___j 3_ -_ i_.,l l l l l 5.00 226 ^ D _a___ _a__L. I I HE _q _ q..i l lp 4_,l _ d' __ t -_I_ _ _7_ I _ 1 o i l l i g E 150 l l l o. _.. __;_ J-- l l _Ll l i i I i l-- - + =j + -l _J-__1_t _ I l E t-4 s l l I i l 2 ACCEPTABLE f---t-fj i 1 g _ _7_ _ _.-p_ _ ____p-j e i l l { E 100 i I _.4 __ . __d __. _,..___l_ i. __ ; _ __4_d__l, d___j i L _l L_ l _,-_r_1. _J. _.. i i 1 i i I l l . _. _ i i 1 .._-__-.._i '.I ___I_ __e _. _ ]. _._ _..q _.,_ g l j l i l i 1 i u. (_(_ y I i j i j r i 50 ll l a a. 4_ J__ Jr L- , UNACCEPTABLE .2_ { l \\ i I I I \\ y_q' _p q__ {- __. g - _a_e l 1 y'- }- q_4_4.._-p _ _;. _. q _ _. t..1 _ _ q -_. d.a- _L a a j_q l l.I l l l I i l i l l 0 4.80 4.85 4.90 4.95 5.00 Initial U-235 Enrichment (nominal w/o) Figure 5.6-1 SOUTH TEXAS - UNITS 1 & 2 5-10

Minimum Burnup for Category 3 Fuel Region 1 10,000 ..___ k._ _ _ _)__. Initial Minimum _.j....._. -_- _h- _...4_ . _4_. 4__ i__ Enrichment Bumup - - -W i- _4_ _ _ _p _ _ _. [. _- 9,000 (w/o) (mwd /MTU) i - r-- 3.55 0 1- --i-- - T -- t-8,000 4.00 2456 ^ ~ T-~' F~ ~T~ ~~ ' 4.50 5414 - -H --j - [-- p-5.00 8598 i i 4 Z _,_._ _ 3_. _7 __ ~ ZZZ ZKZ Z!_j iz 3 E 7,000 _j_ __j _ __j_ 3 ._p-- _q_ .__t _ _ q __ E 6,000 r -p _. s s __. -_t _._q___ _.l _ _ _ q__- _;i _ _ __j __q._ E ZiZ RZLZIZ ZfZ ElZ 7'tZ IZ Tll s 5,000 77.jz ACCEPTABLE _i _. i-- - _ _ + - -p _- f i l--- 00 4_ 25 ZlZ -tZ~ ZI

~E._ 7_

~_ _ L_i ~ E. 4,000 l l pJ-_. _. m (/) _j__ _._) ._ ] _._ _ __.d__ __ _ _ i _ m i t i 4 _ __d_ ___ _..[ L __l__.___ 15 3,000 l l l l _. _7 l [/, n 7.- y_ _ _ q... _ g .__q__...._J_._..- _._a___ _ _ _ _..p _ __ ____.___._7_._ _q._.__. _1_ . q_ _ 7,__ _ 7 __ q_,_._. _. _ _ m_ _ 2,000 E L-_ _ _;, UNACCEPTABLE 1 __ _ L. _.. L _L -_a __ _L _ _L L. _ _ _ ;- __ _ _ -...-. J __. _._ J _.__ _.J _ _ _ a__ _ _4_.. _ _ -__l ____J __ __. 4__ - _ _.4_. __L_ _ _ p._ _.L__ 1,000 l 1_. - 1 _. _7 _. 1 _ y _. _. 7._.__. _g- _ y ._ _ a -__._( _ - _7 _ _ ___._.L._ __9__ _ _ _ [._ _p .___-4__. _3 _ _ _ g_ 0 l 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-2 l l SOUTH TEXAS - UNITS 1 & 2 5-11 u_____________

Minimum IFBA for Category 3 Fuel Region 1 160 .._._. __ _ p _ _# } __4.___ } _. _ __ Initi l IFBA IFBA - - ZS - ZZ MZE- ~ ZZ 150 Enrichment Pins Pins 7;p-- --p;- 7 p-- c 140 i 1.0 BA 1.0 BA Pad W _py Length Length I _.._4__.__ 130 i 6 ^ Y -t 2: zi_ _. _ rc l 3.8 24 33

zjz---

--4 4 i 4 42 59 r-- ~- '- ~ ~ - " ~ - - 4- ~ - - l 120 7 4.2 e1 85 ~7 [Z Z [zzj:-- Z~i 3 4.4 80 111

ZZZ ZyZZ

- jg 4.6 98 137 ~ - ~ ~ ~ ~ ' ~ ~ - / --1 ~ p E 110 4.8 117 n/a l 5 135 n/a 7;. [_ h-[_ {_ _ p.__ZI[~- { y) __._.r_._ _ _4 _ < 100 g x-txx ___qrr_ub-7_. r_ _a xxx r pu cp ~~ ~~ ~- c ~*~ ~iz--~ ~ - " - ~ ~ * - o-90 R 7 [ 1__ g3 _l(Z __ __J

---

i z

__rM_! t__ zt-- Z ,5 ntz --irr zi - ----tr/ __1_ cdr Zrfx r a 80 x ACCEPTABLE x rrp c.__p - xxtra 14_ rL_ g 70 ~~~ ~ E j _._j_c 1} x r4_ 4__ _ -rtxx --;___. _ _1_ _ ~7 ~ 4 - " ~ ~ l o 60 __fr Zg- _' ::J-.!- __4.__. __a ,7 .8 1-d.t---'-jr i- _ rr _x L. x{ UNACCEPTABLE 4 _

-f x

rz E 50 '_ _f._ g_ __g F 252 PL;z/:&??_i 2 .: = 2.=f _zif? f=ut _ =[- _4= -m : --i = z_j= =;:= =1- = =tz. =rx =gz _q=

;

=;=) 30 l

]= _ -{1 f=Jg: =V

z zl

- =[= z;=

:Tr o r rj

-: =;m njn xrn x;x a __

20 ._ _ r _ _,_ 4_ _ _g . _ _[Z 'T ~ ___Z. ZZ ZZ Z Z.Z Z ~l'] T...Zj _~_Z- ~ ~J -_ _ _ _ 'iZ JZfZ _ g _... p__ _._g.__ _.p _ l 10 f 4_ _ _ _ _a_ znz)'=;r ~ ~ ~ ~ * ~ ~~ ~ =f. -~ zyz riz _:12 .;r zr- ~ - * - ~ ~-' ~ ~ ~ ~ 0 l 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-3 SOUTH TEXAS - UNITS 1 & 2 5-12 l

Minimum Burnup for Category 4 Fuel Region 1 25,000 a._[.d.,,\\ \\ l l t : 8 Iil! I Initial Minimum i _L_ t[.r"fj _i-l l i i-Enrichment Bumup _.. _} _., _, (w/0) (MWD /MTU) ] 2.5 0 p-20,000 t 3.0 4955 I I 3.5 9490

llll, lll, lill -

4.0 13790 - -" i-' " ~ ~ ~ " ~ ~ -~ T T +h I-4.5 18063 7 3 5.0 22278 q_ _. i _ _1 ~ 1 i i i i, _l j ..q_ _ _._. ; 7._ q_ L! L' o i w_ _t_t.-4_ !l E 15,000 l! l ! I / I l ~ l tt._L [_._._ _ a_ 4 _t_.._Lt__. ._I o. l q . _. 7_L_I _ _ _ I_I_ l l . __.u m 1 ACCEPTA h_d_u_w._BLE-- -~ Tt- - 1{.g d_. __fI 4 j!.__. _ .6 _1 illI I!! I l I i I E

• 10,000 I

! lIl /l llI i l1 ll g .__.4'. _4_b1_ 44 J_ 1._ __4 l _j _,q_p _.p.- _j _ _1 g_ J_ y__._ o _,! _ l, _ ,! _r. .i. _ x' 2 7 _. w _, _ lj.jj- -l; ll - . l-- l l u. 5'000 l l UNACCEPTABLE l! _.._!ll. _pl._glll._ ,, u l.. l ,. + 1 l ._!!-. __ I1'_ l iI iill l q._ ._ -. _, __.. l'_ LLp _ ;.j. p_ _L.4_p _.-.._1 9.,. _ p 7 !l i j- -l l I I il. l 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-4 SOUTH TEXAS - UNITS 1 & 2 5-13 t

l 1 I Minimum IFBA for Category 4 Fuel Region 1 170 _ _ p _4__q .__3__ 160 initial IFBA IFBA

.I' Z ::

Part z,= Full Length Length l Enrichment Pins Pins

jzz ::n; cf___

I (w/o) (FL) (PL) If~ : =7~[ ~j--- Z--[~ z_ l 150 1.0X IFBA 1.0X IFBA _4 _ g. fr~ nz" Z: _._ _. a zt M0 2.5 0 0 +- 4-2.6 13 18

--- r _t__ __j --

_j77 l

2.8 38 54 - +-- - - i~ - -+- 130 3.0 64 89 i _[ i _[~ [_Z ~l M h 3.2 89 125 --~~ L __ Tu C-_Y - - + --- + - - - - - - ^ 120 3.37 n/a 156 E 3.4 114 n/a st

n ft-- __t

l 3.72 156 n/a --t^ 2 :::j::-~ t -- 1 5 l m 110 i l 4 6 - -b --- 4 -- I-- -- l ~ - 1 - -r e 100 a__ _ 0- =-iz =4: -==4 ~ " ~ ~ " ~~~ ~ ~ ~ ~

=f ^ --~

tz = t=

zi--= t=.

90 ~" .5 =+- i .)= } =q=

=L==

=\\ =. _ _. _ [_ _ l Q. n-- ACCEPTABLE Zi 7-ZOr~ zizz ZZ1- - zzi: - 80 L__- in =i _ L_-=___=_r=..._ _:_, =__. __ F= 22== =. _=d _._ _ ___4 _{_.__._.. _ ___4 3__ -- y _f.g_ (--_ 60 -~ ~ j =4xx - ;=f=r c _ ; __ jn: - - - " - --H UNACCEPTABLE dx: x=;x

rjn_j

-c 50 3 r 40 .l z z. ~ i c _m _ _ _ _l- ~-;_z

~::=

_ _=l = 1 = _;=: :-i= l - =,b: - * ~ ^ 30 ' *~ 1= - *& unn c'.x =gn= x xr----. rp:- cx q 4_ 20 ~ ~ ~ ~ + ~ ~ ~" ___e.__ -~ 4. __. r_ i_ -==1_:_=- =.=

=1=

zzt= =rz -+ 1

:

f=1= ~* ~ " - ~ ~ ~ ~ + - ~ - " ~ ~ - 10 - t.: =tr- =q _ _. =

;

nu r 1 1= zz' = zzZZZ ZJzz =' 'J ZZ 1ZT -~-- !ZZ =!Z:- l 1 0 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 initial U-235 Enrichment (nominal w/o) Figure 5.6-5 SOUTH TEXAS - UNITS 1 & 2 5-14

Minimum Burnup for Category 5 Fuel l Region 2 { 40,000 j ~ T'Ed h, i + U 7ij - ~ r ff f H "F initial Minimum t-Tft T 1;- i~ Enrichment Bumup fj ~ i~ (w/o) (MWD /MTU) TEI TTI i~ TlTiTi 1-' i 35,000 .- _,hi,I . I._.-__ _ -..J 4_ [.- -1 _ y_dj _- . h,xh i f. 1.7 0 + - - 1.8 1746 13_ j 2.0 5032 LL L Jl _ {_. 1 LL-1-- I I I I I 30,000 2.2 7976 - ~fh dhh -f l f 2.5 11839 T~iT 7-T T-T7J 2.4 10613 B L 2.6 13012 _ T.._ T _i~~ _T,_'n-.-}nTE r g 25,000 1 3.0 17363 ii i I I I I iii! E 1 3.5 22609 I' i _-._JJJJi 1 1 I i_ L . J. I 4.0 27839 E 5.0 37542 rf l-b - -U j-,-)- J-4.5 32812 1 +' r citr T T 7+' s 20'000 a3 . jplJ--p 4 p-pt!.g4 l J - _{ J_ !_ _q_jJp .l. J_4_ ._ g,j._ fACCEPTABLE _ 4 L,_ 4 %,_ p _,_I~ NIT T i-If~ ~~ x f J T V M T W 1 ^^- m 15,000 ,,;3, i;;; i, i , ij i .yTmT W,, ; R' Y -' _W -' g'_ _ T~ ~ - ')D;, T;T..H ^ _ ;q.7p,4_ _T K,.Lpq

p..j]__ q7 qJiQq4 l

~ .g __,J_ 7 <c 7 pL 7 -g7y.y g-g 4_gg _7 y _. 7 j j.. q_j 10,000 44 41i _;_{ _164pp-4 J_p44-4..i J.Z L~ g p_ lJji 1.#.J 1 J -.1 7,i_I i q.,_ t __ p g_j -.g. i l 1 1 .T UNACCEPTABLE

j.,i

( 4 3 .p. g_q-y7 gq.dTF + t-M H~M Mihd~ 5'000 l l JJi UJJJJ JJJJJJJJ.4 J.lJ J.. n J J - A J a p1Jl l t 1. 4 i i >t 7 --l i i r r,ig i t __iiit': -l i -( g( 3.. g(. p-p 7 g 7 3 0 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-6 SOUTH TEXAS - UNITS 1 & 2 5-15 L

Minimum Burnup for Category 6 Fuel Region 1 45,000 c q _r.,_ _ g _,_ g,_ i i it _N~L"1k-.4,T. ~ initial Minimum ~.Ti ~, _~r ~ -- _LL r Enrichment Burnup JJ._L!J.[Il l l '_. l _ JJ[L JJ !J _ql _] l 40,000 (w/o) (MWD /MTU) 1.7 0 ~ -j 7-2.0 5641 T.- _T 1'_- T. +- -~_~_ ~' m:T_- Jjl,_,J_nl IJ E lI l i i il 35,000 2.2 8986 J. _t,t,, h, - -f-d - 2.5 13318 ---i '_-h_4JJ._h_- hd-1 2.4 11954 D 7].._.. _ 1 r .r _.. _p.i _,!_l._. i l 1_ I i I 1 g 7 _u 2.6 14619 - Q'4j ;--!--jj y[p -q-p}y 3 -7 B 30,000 3.0 19444 ,, l ; I.~T~T1h,T"L i 3 i 3.5 25280 _ '_N_7 ii J1 -*~ - q_iLLWJ_.4_ _7.._ J-_ E 4.0 30965 --_1_1_h E - 1dt-i - i J t4 i, _}l1'~!j+l}'._p 4.5 36382 ~ -t - @ 25,000 5.0 41547 lil _ LL _i _p a i g ...pjy.4_ja...j_ _q _qyj -j-p p_-Li_ i e q1gj7 3 M,. _T. hr.1'~TJ_ n M._.-,F+F T C_,_. - h J-' E. ~' H 'F_. T 1 m riJ Ae' lP 7 b 20,000 l'! ' i .b ACCEPTABLE --i +2 i- -H-- -i-i - Y i 2-j -i-E 71 g pg, _j_p.pp jgg,1, '- y=g4.gj_q7- -4 _ _y. - _ -- q p 7.7_ 7g4 ( .( 3_m_3 g < 15,000 ,,,, 3y,,4 i-,i_(,,,,_(. , ; y, 1, 3(_, ,4it, , i, _( 7_.( y___7, _ _7 j . w _- y _ 7 -._. _ _g ._..._1_4 ,. - _.. 7,l.... 3

1. j

_.i.-,,.. I.. l. l _ _i _.4.y _.l _ !I 4_e,! _.4'._ i.. 4_.._.]' __4_..i _i __ f.. _a a,l.._. I l l i 1 _r i 1 g[_.t l l l l l I 7 g q _ 7 9l t i, t i I t g _q'_7. g' i i tg_ j {_ q_).g_ j. t _ 7 _ _ 10,000

1. a J J.,, _...., i i

1,i m.LL o, J, a. 1i ,!,i . m ],T Jl,II UNACCEPTABLE i -.i,i _ i i i l i i i 7 1 q g _p q.4, gg.pg g gggy ) ,,_a,~ piiil .a 7,,i n. l I i l l j ' I i, I ' i ! I ' I I i ') l 5 000 i..,i _ l i i t ! ! ( i t i 1 I [ i I l l ! i J.l l i l _.i ' q?. _.;._t 7q_;..p _+_! 4 q__7. 7-q _ tj l.7-s .q q 7 7q - _;. j 4 {. 7 4 ..J _p - _q. 4. p ]_ -- 7_u j d' y q _i 1 i t1..y q

q. % _j_...,b d

, _ge, y ~7M,h,_b,i P ~ 2 "-+ IT-i-L 7 d 0 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-7 SOUTH TEXAS - UNITS 1 & 2 5-16 a

Minimum Burnup for Category 7 Fuel Region 2 60,000 77 4. r, Fr_+ .r, i. 7q. H..,_e g,, , M, - n y 7" T ---t y#._ y - g*Tf f-Fr v "b ~r r"+ Initial M,n,imum i T 55,000 Enrichment Burnup ._ _p 4 7. e' +' r 1- ' +' t d_4_q.L,LJJ_p ma hp -.l_ j. L, J a L (w/o) (MWD /MTU) a_ p L -41gJ. lk r .J4 __1_L.y]..q. y .v .. 4 _ 50'000 L 1.65 0 _ _p4. p. t 1.J _.p L . 7jf_'I a.'x _ _a t '1 4 F--H4-t-- u- --F + 7 m _u.H_ _L t1_F__.7_H_?y 1.8 4366 1 M-o+ ~H -*H r r - +H 2.0 9594 - - + - J r 4 1 l-T 'lr +- -+- 45,000 T 2.2 14013 I t i ~ 7T,TT M,+ Y T Y.7 o T 2.4 17546 ~. g y E .T.. 2.5 19045 ~ TTr~r Yq+ - r~ f~ r'T m;,v4-F M -+ n' + t'- 3 40,000 2.6 20392 4-x m._._ x Ji.q aq4 g 3.0 25096 t gp_q_]tt4_ _r.p 4,7 - _;qarp_7g,-- _p, _7._ _p E 3.5 31083 4_. - 35,000 4.0 37157 -... i.1}.7 _ y _ 4 2 2_+, a 3 4 4.5 42826 l+-tty Y+-- E I 5.0 48158 T TN ft E TT p~22 ~f 1 T r 1 s 30,000 -FF HFF +#FL _pq4pp7,._i_.e*p. .4_4A a_F

• .4. 21_g._ "!

"Hi H_q-H.7_7p_%' 7 ii-H"L_ m a._p+_p+4 4.J_ q_ p7 4pppg qr g4 3 47L7,4 l ++--- r n a- -+- 4 1 ml. ACCEPTABLE +-1 , 25,000 4-4ll.' r+l l ' u' _al ' - - + E. -9 p_-4 r"_ _ Si- +-4 1,_ 4_ pq+g -1 w pagg _r _7y__ggo g4 7 7y-7 m 74 p3_p7pf_ 43q.7, 7 g . 7.py q,_q_r7 77-7_77 _7 T p77 __7 < 20'000

• HFFH._ _*p_ _{. _-

,F _+ 3.__.F F. g F y:_ilH_.t._h_ H "_4_... _l_ .j,Hi,t,_ i ., 7_h__gL_. 4p 7g ..__.q._._._. y_ _ pl_ J__t 4 _ JJJgq_L 2.pj..pq _7pp _{ 4 f _ p _ y. 3 . _[. .. j L _p g 15.000 .. peg a q q _ q + t_a_q _y _qq_ qq_ _. ppg.Aqqa4 Aq._a+p_.7[ a pq _._t _ 1. _ _. q ._p7 4Q 7+y...J__p_u 44u-4+ g.4 f. l_ h. JJ 4 UNACCEPTABLE p-r, 10,000 m muqa,e qwm _u JJ q m.t a.a a _ugaa+ J Lt. _r; g },_.).

1. . axlx.;_q.1u..?

t Q 14 J u.4J 144 ' 4! J L _..1; + q7 - 1 Lu- _4g n.. q 4 H g __fgAL 4...j4 q ppp{y_q - q +7 f g 4 qay.. 5,000

g.,

3...y.3_,q_,H.j* +4 7.q 7 p. T,_ Hi+ M_ -F 4+ M. Hi_g"_+y Hit _7H+i.. .g7 47 x 7 .+ i, g,c-- p,h H -c - rh47m3 +m +_r y m 0 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-8 SOUTH TEXAS - UNITS 1 & 2 5-17 L___________-_____--

Minimum Burnup for Category 8 Fuel Region 2 55.000 l n' >c I pg' yJ _-Y pa q_ >>_m ,d__yy __. Jl J_4_ a_ +, r p H bh._.. .F Initial Minimum 7 50,000 [ Enrichment Bumup iTT ~T T Ti-7 TIT i dd (w/o) (MWD /MTU) i p -4+ +q_.tp H.q _J- _4 _. 7 l _.__ _ _. _ L +. ,g f 1.4 0 - tif}+brj + - - -] +7 7 r 45.000 1.6 4524 y-44,!4aa44a p aJ,A_ _F._M J4J,q._- 74.P_.77_j-_7]_-d*J Y' T 1 p. - 4 47 1.8 8678 ~ m 2.0 12391 J 74phy 7 77 - "3 40,000 T 2.2 15624 41-...TM~hi,Y --',J-m - -+ l-- ,,i4 p., _7 3 y 2.4 18456 7 r-- + --j 8 2.5 19755

11p4Lh_

iZ:EZ1_.f 3: 35,000 ~' ~ 3.0 25634 _1_ _ _l_JJ. i.7b JJ J.d._,, a_ 2.6 20996 l l, , 1J _, ._w E 444 ' # r"J-- * -

• l-+-

1-35 31396 _-J a _j a... r H '- c. + - H-- "'J J-3 3 30,000 4.0 37084 E Y 4.5 42471 ~ M + YY._.Ib '3p 37g~IYhj l~tYf~ .. ( 7 77 7 CD T 5.0 47589 -~ +--- 7 4 _tt.7 7 _tT+tp; ri-I .J J_.p__4pp >. 25.000 7'.': } ' ACCEPTABLE~++qu - i1 4 ' i M_iJ aJ 4 4 > n M -li l o u n a2 1 I2-h"Lb l-trt-n-t er tr +J+h E, i Ja +- t -F h 4 rM { thi i e t m 20.000 m JJgqaaa44_ a4u q4 4 ppp;_ppppp _pppppq_4 J-+- 1 4_4 _.4 g;qg'q+ .cc ..pl -i f, H_,- r -._ 7 7g UNACCEPTABLE - _-b-+t-L. 7.t -7, g. 77 77 3u 15'000 _ w 7.i+ p,_7_H-H#__ .F_H F._H,y-FHtl -J 1-M,, +_- 9_j_p44,__ _,F_F. ._.., 7p.4_ _p.7 _,_ j,__g _7 3 _Lgy..p ..j_y_. L 4 .pp . p J..._ q_ .y_, q. ; y1 _7,..L g 7 10.000 .qaa p q qq-u..u;4._ g.a+,_wq p a4 #pgp1+.. 4gqq4,7j_j _ pp2 a.u y_. p qu y_q_g. p yq_p.g.+_pp g%.7...g,_rr q g i y F g.. 44 rp q,g_ 7 7 _ 7 7 7 r._ 7 7,,,p 77 5,000 4 _g gggp g_ gtg _g_ _ 7. _7..q_ __p m,__ ,7 m 7 7 _7._y _r7_7 _.. p u4 7 ._ 74_77_.y q....g{J g.p 4 ._.L Q4_g; 7_.4 7-f.y p ; p_4-_..j _.._p.. g.a p_ 0 i 1.0 2.0 3.0 4.0 5.0 1 Initial U-235 Enrichment (nominal w/o) Figure 5.6-9 SOUTH TEXAS - UNITS 1 & 2 5-18 w________________

Minimum Burnup for Category 9 Fuel Region 2 60,000 ,,n m., . 1, y. a # p..g

4 _; +,. ;J 4-;,4y a-

..I 1 J J a- -.F-Initial Minimum H F

1. h_ t _-H--H -

.iH.-. rl t :l-l'. y' 55,000 Enrichment Bumup ll 1' (w/o) (MWD /MTU) MNEl C _iid, ifiji _-_ a J_ag_LL a_ u;t ta.14_ q/ .a a r t 4 L - Q.. g _.p L. 4 50 000 1.4 0 _.J al. ' nU' _..u t - i 4 4a u ... g u n 4 1.6 5346 p. q.# _j_a _..J_>..t 4 1.8 10179 l-t-H _p_i ~_1_-Y" h -+- l,,,4_. yt4 r 45,000 2.0 14398 y m _; . l _7 .._y, y 3 2.2 17943 .,. r ,,.n it 4 y~ T,i.+_p J tit -t c-trFt1 - g .P 2.4 20931 m' ~r..,i J._4_p ' ~ y.1T.iT,i t _~~ E i p a_ ' 40,000 2.5 22266

l l,l

, l 7-,' 'y O 4 -+a*A.7 au..41qa_ HC r _J,"_._4 4 q _ y g

4. -

2.6 23521 4 ,F_ u 1 gaq' _ta _i_ 2 a g a4 lJ. E 4 3.0 28146

jmL, L

- 35,000 3.5 34039 _ 4"l'7' 3. _ppl _,ll< ,l' -4l T-a ,p r+- mtl_L' W.7Lw*. 3 4.0 39969 - t_=p i+ g . y_t.r.t. t y 7 u 4.5 45571 Hr fbr-br r-ti s 30'000 m 4 5.0 50898 fj+.q j+p.j+.g44 J-pl-tpp . b i ; i..i. 4 7.,i__ _.i 9__p_; 1....p {' r rt-td v i

i. n 1_+ t t t i

i i _.p.p L _ q.;-_L

g. _f.

7_ g,. _ +. '. mL..',p JJa_u .-ql,llll{4 a-7' t

1. E 25,000 ACCEPTABLE +; ', F T!,,lr,l mlHT.1, l

l 1 r t n, --+ r,r-g_1,7 7. g.. tr P ._,q.v4 -m.q_ Fr r m _ ,r._ y_ q d._.77_,b _7 7 J-.7_ g g. j 7_ 7 .g_p. _.q q... p g_e _p774 _7 g p. p ._p_, ._7_, 7 ... y. _7 < 20,000 1,~__, W, _ _, _F r,_ 4+_ T... _ r, __ UNACCEPTABLE i rt~c~ P -g m t .. J ed a_. 4... __3... L14.L.14 p+ +q,_, _JQ_...........4 4 H a + g q q q t I_4 J J.._[FH + y 15.000 A np 4_Lp.p, qu+ m p_ d m g. 3. q u aa a ga.to4_, _. q i j _ _ +q _. c 4.] Ew-H..+,_t.,_ 2a L 4 J.5.j_ h -_i., L.,t-F.1 H_ a", H. # m. _...- +- t.y alt. __4J- ...- ;. _L -g. p H M. 1 a q u +q..'1 10,000 u.' u tu u ..pgaas g.. p 2aL +m w o2

44. i n L_ qi.... +4...ql a aa a

.f,.a _. u.a n a1 .1 [_.J _4 J a. g..J a. q _j411.; p _ 4 p.g 4 44 7 7 4 424p. 44 - a.4 4j.-44_rj _ . u. p L qq.q.J4 5,000 a u _u h_q m_._L q n t p a_. u_up a m,u a_ u n a_g_ tgyq.,p._ q p y.1. p _ J _4 4.,,4 9.. 4,_a _,{_ q j _q.p p q, _. . _, _ r.. _.. _ g _ q q _. _ ].q._ q.. pjJ4La4,p. _..L _[..j -4. q.. j _ _]. _ -.. _ {4..q ij.J-q _L. r . p7 j.J j _}. l 0 l 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) Figure 5.6-10 SOUTH TEXAS - UNITS 1 & 2 5-19 i

I 1 Minimum Burnup for Category 10 Fuel Region 1 1 65,000 y,, _,._(. 7.4. ,,q .,4 9_7p a_ 7 y., .q t-t t 1.n 4- ,q-7._vrF-t i Initial Minimum t 1-v .vppg 77 7 7777 60,000 Enrichment Bumup _a_j_bq_g_Y_7 -4. y ,i _a_. a_ J_~_'q_q_ 7 (w/o) (MWD /MTU) 4-T _ _ 7 g _a_ _ ny. , u ' ' r. 7 55,000 1.4 0 - -.H _.-sp4q' a4 a q 1_a _]+-. '_.t_ 4, -_ _ p --,,7j J+-- +yy tr r 1.6 5273 rt 50'000 18 10019 ~ +""'* * ^~ "77 7. 2.0 14145 - ".4 + 4' H 4 q" + t! -i + H "4 _r_F H_ds _- +- - ",~rf,r_4--I-l-_ t + "4 J ++s 3 2.2 17652 n l F 45,000 2.5 22143 _ - H trrF ;-r -- e r - -' l E 2.4 20705 + ja+04 E ' _ 4_ _. g l4_ _.# _ ( ,._ 4 4ap-4 4 -_._ 9 8 4 b + _7__ H 4 -r4 4 g 2.6 23561 +_._.__.- +FH+ -t-E 40,000 3.0 29329 - -H-H+1 -+ 4 --H + M r_b'_ F -F ~ a ,T 3.5 36715 _w{n1 u,_-~p ~~~b_+t rr _._ u 4.0 44096 - n ~P"7 H11t -+t+bb -+r m 35'000 E - + +"H+l+y t.. pH__,_-i.*at" 4.5 51352 a + w --i - - 5.0 58325 >, 30,000 , ct7tijr mvf+P I m r terc e mr t re-a_y4 pa+g_ aaaq+b+F =%.puqqq+ q__gu+g g_g 1 _9+_.44_ .m.._ 7 3474 _ -_.-_ g i, ACCEPTABLE R,. - _ _7_ Pt l E g y. 4 w1nt-t _r147 y_ _77p' yp'+ en e 25'000 l tFW3...+H... y+ H_7.,y 4,+ b. H,H.,"4_H-+F_ + 9+

• i+Hii-F

" _4 "3 7 % p y 7 7 m m 3, 4_gj 1.. _ca _ _.7_ <( gp _ _4 gy .. 4,. y _ -~1- _{ -_. _1_

' +. g

. _ ' _..

UNACCEPTABLE - 20,000 .Laq;pp + _,+ e 4 -._ p. a _ 49 a...pi_d-trrr+4-rl-tr r n--+i-H1- ~+,,t.,rF,,q_ , J pp g eq.y-h_4,_ _r.,n..._p+ yyr_r -g J _ 7_3t,+rp,-- u. rm .ny p n 77 7 15,000 . u a 2a oa_qua m #g yaq+ ,+q J.}g a + pa a a_m_[. _+7 . q_.1 _,y_ _pq_ g y g aq.y_7 _j__ p __y r+ + e rrn-&tr r t cH Tr & 10,000 [.wp3.. g r,..", -t" -F P P + i t t-rt--r Wrrit -d -t7-r -H +; T' mr- , g, r. q,, g,,,_ 7 _ _ _g _ y. ,.. r m 7+a. y y7 +ttYr,r t -M --H++74g n_- - - + n -~ -WW _._ g,. q y y ~r_..w#m 7 yyr-4 y,,,7_. ,,,,2 _, 7m.-,4 g7 3.y7 p_,y y n.7 777 5,000 7g+ 4. r,+_y_ .g q+pg+pg +pg a +p.+ +H._ L H 4 H t .., _. - m-a _~ts.2,_ rp 7_+ _7 H7 r _ _jg7_7_ .. ! _.g. - },4g _ 4 7 7m+y _.7.py. g 1_gg _p j_p y.qJ q_H p p L

yyuy77,

.y~ y.9 0 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) Figure ".6-11 SOUTH TEXAS - UNITS 1 & 2 5-20 L

Minimum Burnup fcr Cat 3 gory 11 Fusi Region 2 60,000

tax:1 :;aq ;

tui

n;ti:

q : art _ n4 a,m 4_ _ _r :a=. _4_r, t g a1 t._. _p 1- + _m .p, _7.. 4y.;a7r.o-122 4._ _t..L _,_. g _4 _. _g +i ti-" Oyear az'$_., _n, _ aq. t: 1 ;: ,1 t y_g-y_ _ ! _. car 4,: m:+m:

nntt

-..,4 +.1 _ _1 2 year ...g g _ _%q t an ;i starn% nt t 4 ;- $:1__t>_ S ycar I a,n !,J - 14,.q_- ;1 r-r-4r -+ 4m _4 _4 _4 _, _ _++,_ L4 % 10 year .- o _ -4.- . + + -. 50,000 m,_-. 3.;.....,%. . m.,_4, n_._

t:p.

_+_ n r. s D _-n._ ,a + n +_ C p y;; _yy;r}t-f: Tjgst - : + -;%n_+ ,.y. _4.._ ,. q g _.,_. 15 year

m. _ g.

F- .11.; f T_ -_hj a3: F 20 year 1 ty: y -4 ._a a .7 _3 3-_ Q

tq::

ACCEPTABLE _- x10 jx~t: --tt-}d: 1r/jf' . _ 7-t* - + + -, L -w E 40'000 5 21 - -.4_+_ 2: xtz1 nan:" ff* f_4,_7---}:

2

p_Lt

" 4 - f -t +t _1_1

{.l ~~j: d j:*h _t:*-

TT "1+t r i Z4:j' t-C al 7

y_:1

_L. ..t _ m. L q _7_144 2+ _ q__ ,33: tar E 12:got: q:217 : 5Mrd:: i:E ax. j M. m artxt st-4 -4 t r m ;2,1 233:: 4 4 y _4

a 12 1

s 30'000

• ar :+1:n,_ti 71,_ ot~-tmp m

1x14.

~* 'g)Ciu cy{rtut-* , x st f =tst::j )g:1Z "[tgrg q tt. 4 m t.1_;,: : C+ Ox t ... +. _4_ + 4_ 7 l triz; +p _. : n 1t rt-22 3 v +4q 1:

Llar rg 1-d-o rtuar

.x E zhtt1 h rt rr n :1: z tm ". g* ;g ryr-ryw +px

• 20'000 1

g m;;je :nnr* f<,4_r-a_11:adst._ UNACCEPTABLE 1:1:1- ) in*n = q m ;:? _#._ L: 11 1 1;rtz ; 21:+ .. _p y_13-- _. a _w. _.p,_ tnt nt$ 1 m;.d t t m: r _ 4_ 4 g,a131.

q:$31

..t1_. e t: 23n1: m ch::: 1-g-txt { 1, ann-! cht:11 2 1 st: -txt: 4 10'000 ntz;r tztztr x;ax; m : 11 1 11 W{ngtarn. g-1;n.t3 t _tg-+t; dt4:f:31.aaqx 13.t--+gtaj cxt_1 y __t. x t_=! t x l

t ot

r_-*t_ ots4_a _1 tr-1 4_,_.

__e 9._ _4 _w4 4_. ._4. 4,_..p J _. +4 _m . _4,_a_- 4 4 q l tt,z $ tzt +: -4 _,_. --t --f -- * - M4_+ _,._ ---+ --+- 4 --i ---f-_-.w+- ---+ _. 4 -I_- - 7_ ._+_.4 4_ -t--*

• -r +--

r d r_4ar sta nt t trict dnzta: :1mnt- :tLpp 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Initial U-235 Enrichment (nominal w/o) l I initial Minimum Bumup (MWD /MTU) Enrichment l (w/o) 0 year 2 year 5 year 10 year 15 year 20 year 1.2 0 0 0 0 0 0 1.4 6533 6188 5807 5384 5113 4937 1.6 11912 11298 10613 9843 9347 9018 ) 1.8 16021 15221 14313 13282 12606 12149 2.0 19209 18285 17221 15992 15177 14611 2.2 22150 21130 19939 18543 17609 16952 2.4 24988 23888 22590 21050 20012 19276 2.6 27732 26563 25173 23507 22377 21574 2.8 30389 29156 27686 25912 24700 23838 3.0 32967 31669 30126 28260 26973 26057 3.2 35474 34107 32495 30550 29192 28226 3.4 37919 36481 34803 32787 31363 30348 3.6 40314 38807 37064 34981 33493 32432 3.8 42669 41098 39291 37138 35591 34485 4.0 44995 43368 41499 39267 37664 36514 4.2 47300 45629 43697 41374 39718 38525 4.4 49582 47878 45885 43459 41753 40518 1 4.6 51838 50112 48056 45519 43765 42489 4.8 54065 52325 50208 47550 45753 44437 1 5.0 56259 54513 52336 49551 47713 46358 i Figure 5.6-12 SOUTH TEXAS - UNITS 1 & 2 5-21 l l l 1

l R gion 1 All Cell Category Category 4,6,10 4,6,10 .jCategory Category H 6,10 4,6,10 J J Region 1 Checkerboard #1 ) V/////I, / Category

Category ::

y 6,10 /

3,4,6,10::

y j 7////4

Category :: / Category

/ j

3,4,6,10::

6,10 / V/////) l Region 1 Checkerboard #2 l '///// / / Category / Category / 6,10 4,6,10 ?/////$ ategory Category 1,3,4,6,10 10 l l l Note: These configurations can be rotated (90",180*,270') provided that configuration interface requirements are satisfied. l Allowable Fuel Categories for Region 1 Configurations Figure 5.6-13 4 SOUTH TEXAS - UNITS 1 & 2 5-22 L_________________

l R:gion 2 All Call I Category Category 11 11 l Category Category ) 11 11 l Region 2: 3-of-4 Storage Region 2: 2-of-4 Storage r ategory l5,, 9, 1 : Empty 2, 5, 7 Empty 8,9,11 l Category Category Empty 2, 5 ' 5,7,8,9,11 :

5,7,8,9,11 :

8,9,11 l l l Region 2 RCCA Checkerboard #1 Region 2 RCCA Checkerboard #2 f///// /////// / Category Category Category Categoy j g / with RCCA with RCCA ' ////// / f // Y Cate0 7 /Categoryj / Category /, 7' 9 . Category 8 8 / / / / with RCCA 7, 9 '////A V///A Note 1: Category 8 and 9 fuel can be substituted for any and all Category 11 fuel at the periphery of region 2. The periphery includes: celllocations next to the spent fuel pool wall, or cell locations separated from Region 1 by one row of empty cells. Note 2: See Technical Specification 5.6.1.4 for provisions for storing non-fissile items in empty cells. Note 3: These configurations can be rotated (90*,180*,270") provided that configuration interface requirements are satisfied. Allowable Fuel Categories for Region 2 Configurations Figure 5.6-14 SOUTH TEXAS - UNITS 1 & 2 5-23

Region 1 Boundary Between All Cell Storage and Checkerboard #2 Category 10 Interface \\...........ly2 Zl,.. j Category 6 or 10 Category 1, 3, 4, 6, or 10 I b i Region 1 Boundary Between All Cell Storage and Checkerboard #1 Interface \\ Category 6 or 10 Category 4,6, or 10

f!!

p 7! llfll Category 3,4,6, or 10 7

=

="::: ll [ 7 Note: 1 1. A row of empty cells can be used at the interface to seperate the configurations. 2. It is acceptable to replace an assembly with an empty cell. 3. See Specification 5.6.1.3 for provisions for storing non-fisslie material in empty cells. Figure 5.6-15 1 l SOUTH TEXAS - UNITS 1 & 2 5-24

Region 1 Boundary Between Checkerboard #1 and Checkerboard #2 l E E E Category 10 Category 6 or 10 m Category 3, 4, 6, or 10 Category 1, 3, 4, 6, or 10 1 Region 1 Boundary Between Checkerboard #2 i ) and Checkerboard #1 l l Category 10 Interface i Category 6 or 10 Category 4,6, or 10 Category 3, 4, 6, or 10 Category 1, 3, 4, 6, or 10 Note: 1. A row of empty cells can be used at the interface to seperate the configurations. 2. It is acceptable to replace an assembly with an empty cell. 3. See Specification 5.6.1.3 for provisions for storing non-fissile material in empty cells. 1 Figure 5.6-16 SOUTH TEXAS - UNITS 1 & 2 5-25 n

Region 2 Boundary Between All Cell Storage and 3-out-of-4 Storage ll Interface !yyngi Empty Empty Category 5, 7, 8, 9, or 11 Hi !!I 1 Empty Empty i Region 2 Boundary Between All Cell Storage and 2-out-of-4 Storage l Interface \\ Category 11 Empty Empty Category 5, 7, 8, 9, or 11 Empty Category 2, 5, 7, 8, 9, or 11 Empty Empty l l Note: 1. A row Gi empty cells can be used at the interface to seperate the configurations. l 2. It is acceptable to replace an assembly with an empty cell. 3. See Specification 5.6.1.4 for provisions for storing non-fissile material in empty cells. 1 Figure 5.6-17 SOUTH TEXAS - UNITS 1 & 2 5-26 i

Region 2 Boundary Between All Cell Storage and RCCA Checkerboard #1 Interface Category i I Empty Empty Category 9 [ Category 9 with an RCCA I Empty Region 2 Boundary Between All Cell Storage and RCCA Checkerboard #2 Interface \\....... Empty Empty Category 7 or 9 Q 8 Category 7 or 9 with an RCCA Q Empty Note: 1. A row of empty cells can be uset at the Interface to seperate t l the configurations. l 2. It is acceptable to replace an assembly with an empty cell. 3. See Specification 5.6.1.4 for provisions for storing non-fissile material in empty cells. Figure 5.6-18 l l SOUTH TEXAS - UNITS 1 & 2 5-27 w___________-_____

Region 2 Boundary Between 2-out-of-4 and 3-out-of-4 Storage =

g l

Empty Empty

jg Empty

!!j E!! !!! = !!g j!! !!! Ei !!I I!!..i!$ EI Interface "IH"" E !jf Empty - Category 5, 7, 8, 9, or 11 \\......... Empty Empty qiiiiiWi =" Fmpty Empty 1 In Category 2, 5, 7, 8, 9, or 11 Empty Empty 9_ j 3 :: Empty Empty s t h Region 2 Boundary Between RCCA Checkerboard Storage Patterns RCCAl .RCCAl lRCCAj RCCAl RCCAl CCAl Category 9 Interface 222Z IC5)

RCCAl O

.RCCAl 'RCCA! Category 9 with an RCCA \\........ E RCCAl Category 7 or 9 I[ Q 'RCCAl .RCCAl Category 7 or 9 with an RCCA (Rh 'RCCAl ! RCCAl RC W) Note: 1. A row of empty cells can be used at the interface to seperate l the configurations. l 2. It is acceptable to replace an assembly with an empty cell. 3. See Specification 5.6.1.4 for provisions for storing non-fissile material in empty cells. Figure 5.6-19 SOUTH TEXAS - UNITS 1 & 2 5-28 ]

Minimum IFBA Content for in-Containment Rack Fuel Storage 40 l I l l 1 q __ _ql __ _4 7 7 4 initial Minimum Enrichment Content of (w/o) IFBA Pins ^~ l E 30 l r l 4.5 0 I E 4.6 8 l l 4 CD ^- 4.7 15 -4 "I- + 4.8 22 4.9 29 o ~~~ 5.0 36 ~ ~ ~ ~ .8 20 [ ~ I l T~ i E l oz ACCEPTABLE ___4 i _,_ _ _ j _ _ _ E l i 3 .7 h10 UNACCEPTABLE i j j l L I l l I I i I --_ _3 l _q l i i 0 ) 4.5 4.6 4.7 4.8 4.9 5.0 Initial Enrichment (wlo) Assemblies with an initial enrichment less than l 4.5 w/o are ACCEPTABLE Figure 5.6-20 SOUTH TEXAS - UNITS 1 & 2 5-29

---

.---.-------.-----.-.-----I

Minimum IFBA Content for in-Containment Rack Fuel Storage 40 (_--. _ __{__ ___L___ Initial Minimum Enrichment Content of g l (w/o) IFBA Pins E 30 4.5 0 E 4.6 8 qm 4.7 15 E 4.8 22 4.9 29 o 5.0 36 E 20 l E ,_ d 4 Z ACCEPTABLE e _1. L 3 _{ .I .E 1 +- -t h10 i l UNACCEPTABLE p q _-. l I , _ _ __7 0 4.5 4.6 4.7 4.8 4.9 5.0 Initial Enrichment (wlo) Assemblies with an initial enrichment less than i 4.5 w/o are ACCEPTABLE Figure 5.6-20 SOUTH TEXAS - UNITS 1 & 2 5-29 i - _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _}}