ML20207L220

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Amends 104 & 91 to Licenses NPF-76 & NPF-80,respectively, Revising Spent Fuel Pool Criticality Analysis & Rack Utilization Schemes by Allowing Credit for Spent Fuel Pool Soluble Boron
ML20207L220
Person / Time
Site: South Texas  
Issue date: 03/03/1999
From: Alexion T
NRC (Affiliation Not Assigned)
To:
Shared Package
ML20207L223 List:
References
NUDOCS 9903180041
Download: ML20207L220 (37)
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'4 UNITED STATES j'

NUCLEAR REGULATORY COMMISSION r-2 WASHINGTON. D.C. 30005 0001 f'

STP NUCLEAR OPERATING COMPANY DOCKET NO,50-498 SOUTH TEXAS PROJECT. UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.104 License No. NPF-76 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by STP Nuclear Operating Company

  • acting on behalf of itself and for Houston Lighting & Power Company (HL&P), the City Public Service Board of San Antonio (CPS), Central Power and Light Company (CPL), and City of Austin, Texas (COA) (the licensees), dated July 7,1998, as supplemented by letters dated October 15 and October 26,1998, and February 16,1999, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and j

regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, as amended, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance: (i) that the activities authorized by this l

amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.

The issuance of this license amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regiations and all applicable requirements have been satisfied.

'STP Nuclear Operating Company is authorized to act for Houston Lighting & Power Company (HL&P), the City Public Service Board of San Antonio, Central Power and

. Light Company and City of Austin, Texas and has exclusive responsibility and control

. over the physical construction, operation and maintenance of the facility.

1 9903180041 990303 PDR ADOCK 05000498 P.

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2-l 2.

Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and Paragraph 2.C.(2) of Facility Operating License No. NPF-76 is hereby amended to read as follows:

2.

Technical Soecifications The Technical Specifications contained in Appendix A, as revised through Amendment No.104, and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

The license amendment is effective as of its date of issuance and shall be implemented within 90 days of issuance.

FOR THE NUCLEAR REGULATORY COMMISSION 0

ara)N'.

Thomas W. Alexion, Project Manager Project Directorate IV-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of issuance: March 3, 1999 i

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1 UNITED STATES s

NUCLEAR REGULATORY COMMIS810N WAsHINaToN, D.C. 30006 0001

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STP NUCLEAR OPERATING COMPANY DOCKET NO,50-499 SOUTH TEXAS PROJECT. UNIT 2 AMENDMENT TO FACILITY CPERATING LICENSE Amendment No.91 License No. NPF-80 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by STP Nuclear Operating Company

  • acting on behalf of itself and for Houston Lighting & Power Company (HL&P), the City Public Service Board of San Antonio (CPS), Central Power and Light Company i

(CPL), and City of Austin, Texas (COA) (the licensees), dated July 7,1998, as j

supplemented by letters dated October 15 and October 26,1998, and February 16,1999, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, as amended, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance: (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the i

public, and (ii) that such activities will be conducted in compliance with the i

Commission's regulations; D.

The issuance of this license amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.

i

  • STP Nuclear Operating Company isi..orized to act for Houston Lighting & Power Company (HL&P), the City Public Service Board of San Antonio, Central Power and Light Company and i

City of Austin, Texas and hss exclusive responsibility and control over the physical construction, operation and maintenance of the facility.

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' l 2.

Accordingly, the license is amended by changes to the Technical Specifications as j

indicated in the attachment to this license amendment and Paragraph 2.C.(2) of Facility i

Operating License No. NPF-80 is hereby amended to read as follows:

2. -

Technical Speedications l

The Technical Specifications contained in Appendix A, as revised through l

Amendment No. 91, and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

The license amendment is effective as of its date of issuance and shall be implemented l

within 90 days of issuance.

t FOR THE NUCLEAR REGULATORY COMMISSION C

'tgQ r

Thomas W. Alexion, Project Manager Project Directorate IV-1 Division of Licensing Project Management Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of issuance: March 3, 1999 i

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ATTACHMENT TO LICENSE AMENDMENT NOS 104 AND 91' FACILITY OPERATING LICENSE NOS. NPF-76 AND NPF-80 DOCKET NOS. 50-498 AND 50-499 Replace the following pages of the Appendix A Technical Specifications with the attached pages. The revised pages are identified by Amendment number and contain marginallines indicating the areas of change. The corresponding overleaf pages are also provided to maintain document completenese.

REMOVE INSERT xvii xvil xvila i

3/4 9-17 3/4 9-17 B 3/4 9-4 B 3/4 9-4 5-6 5-6 5-7 5-7 5-8 5-8 5-9 5-9 5-9a 5-9a 5-10 5-10 5 11 5-11 5-12 5-12 5-13 5-13 5-14 5-14 5-15 5-15 5-16 5-17 5-18 5-19 5-20 5-21 5-22 5-23 5-24 5-25 5-26 5-27 5-28 5-16 5-29 5-17 5-30

1' b

DESIGN FEATURES SECTION PAgg 5.1 SITE 5.1.1 EXCLUSION AREA.......................................

5-1 l

l 5.1.2 LOW POPULATION ZONE.................................

5-1 5.1.3 MAP DEFINING UNRESTRICTED AREAS AND SITE BOUNDARY FOR RADIOACTIVE GASEOUS AND LIQUID EFFLUENTS 5-1 5.2 CONTAINMENT 5.2.1 CONFIG URATION.......................................

~5-1 5.2.2 DESIGN PRESSURE AND TEMPERATURE...................

51 FIGURE 5.1-1 EXCLUSION AREA....................................

5-2 FIGURE 5.1-2 LOW POPULATION ZONE 5-3 FIGURE 5.1-3 UNRESTRICTED AREA AND SITE BOUNDARY FOR RADIOACTIVE GASEOUS EFFLUENTS......................

5-4 FIGURE 5.1-4 UNRESTRICTED AREA AND SITE BOUNDARY FOR RADIOACTIVE LIQUID EFFLUENTS.........................

5-5 5.3 REACTOR CORE 5.3.1 FU EL ASSEMBLIES......................................

5-6 a

5.3.2 CONTROL ROD ASSEMBLIES..............................

5-6 5.4 (NOT USFal 5.5 METEOROLOGICAL TOWER LOCATION.........................

5-6 5.6 FUEL STORAGE 5.6.1 C RITI CALITY............................................

5-6 5.6.2 D RAI NAG E.............................................

5-9 5.6.3 C APACITY.............................................

59 FIGURE 5.6-1 MINIMUM BURNUP FOR CATEGORY 2 FUEL REGION 2....

5-10 FIGURE 5.6-2 MINIMUM BURNUP FOR CATEGORY 3 FUEL REGION 1....

5-11 FIGURE 5.6-3 MINIMUM IFBA FOR CATEGORY 3 FUEL REGION 1........

5-12 FIGURE 5.6 4 MINIMUM BURNUP FOR CATEGORY 4 FUEL REGION 1....

5-13 FIGURE 5.6-5 MINIMUM IFBA FOR CATEGORY 4 FUEL REGION 1........

5-14 FIGURE 5.6-6 MINIMUM BURNUP FOR CATEGORY 5 FUEL REGION 2....

5-15 FIGURE 5.6-7 MINIMUM BURNUP FOR CATEGORY 6 FUEL REGION 1....

5-16 FIGURE 5.6-8 MINIMUM BURNUP FOR CATEGORY 7 FUEL REGION 2....

5-17 FIGURE 5.6-9 MINIMUM BURNUP FOR CATEGORY 8 FUEL REGION 2....

5-18 FIGURE 5.6-10 MINIMUM BU"' ~* FOR CATEGORY 9 FUEL REGION 2....

5-19 i

SOUTH TEXAS - UNITS 1 & 2 xvii Unit 1 - Amendment No. 4,40,40,01,00,104 Unit 2 - Amendment No. Se;e5;Se;es,91

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i DESIGN FEATURES FIGURE 5.6-11 MINIMUM BURNUP FOR CATEGORY 10 FUEL REGION 1...

5-20 I

FIGURE 5.6-12 MINIMUM BURNUP FOR CATEGORY 11 FUEL REGION 2...

5-21 FIGURE 5.6-13 ALLOWABLE FUEL CATEGORIES FOR REGION 1 l

CON FIGU RATIONS..................................

5-22 FIGURE 5.6-14 ALLOWABLE FUEL CATEGORIES FOR REGION 2 CON FIGU RATIONS..................................

5-23 3

J FIGURE 5.8-15 REGION 1 BOUNDARY BETWEEN ALL CELL STORAGE AND CHECKERBOARD #2 and REGION 1 BOUNDARY BETWEEN ALL CELL STORAGE AND CHECKERBOARD #1 5-24 FIGURE 5.6-16 REGION 1 BOUNDARY BETWEEN CHECKERBOARD #1 AND CHECKERBOARD #2 and REGION 1 BOUNDARY BETWEEN CHECKERBOARD #2 l

AND CHECKERBOARD #1 5-25 FIGURE 5.6-17 REGION 2 BOUNDARY BETWEEN ALL CELL STORAGE AND 3-OUT-OF-4 STORAGE and REGION 2 BOUNDARY BETWEEN ALL CELL STORAGE AND 2-OUT-OF-4 STORAGE...........................

5-26 FIGURE 5.6-18 REGION 2 BOUNDARY BETWEEN ALL CELL STORAGE AND RCCA CHECKERBOARD #1 and REGION 2 BOUNDARY BETWEEN ALL CELL STORAGE AND RCCA CHECKERBOARD #2.......................

5-27 FIGURE 5.6-19 REGION 2 BOUNDARY BETWEEN 2-OUT-OF-4 AND 3-OUT-OF-4 STORAGE and REGION 2 BOUNDARY BETWEEN RCCA AND CHECKERBOARD STORAGE PATTERNS................

5-28 i

FIGURE 5.6-20 MINIMUM IFBA CONTENT FOR IN-CONTAINMENT RACK FUEL STORAGE...............................

5-29 5.7 COMPONENT CYCLIC OR TRANSlENT LIMIT 5-30 SOUTH TEXAS - UNITS 1 & 2 xvila Unit 1 - Amendment No.104 Unit 2 - Amendment NoS1

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Jyg ADMIN!$7RATIVE CONTROLS HG1B LAE 4

6.1 RESPON5!SILITY................................................

5-1 6.2 ORGAN!!ATION 5.2.1 0FFSITE AND ONSITE ORGANIZATIONS........................... '

6-1 6.2.2 UNIT STAFF..................................................

5-1 TABLE 6.2-1 MINIMUM $HIFT CREW COMP 051 TION-TWO UNITS WITH TWO SEPARATE CONTROL R0DMS................................

5-4 I

5.2.3 INDEPENDENTSAFETYENGINEERINGGROUP(!$EG)

Function...................................................

6-6 Composition................................................

5-6 i

Responsib(11 ties...........................................

5-6 Records.....................'...............................

4-6

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6.2.4 $NIFT TECHNICAL ADV!$0R.....................................

5-6 i

1 4

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6.3 (Not Used) l 6.4 TRAINING......................................................

6-7 4

i 6.5 REVIEW AND AUDIT..............................................

67 4

6.5.1 PLANTOFERATIONSREVIEWCOMHITTEE(PORC)

Function....................'..............................

67 J

l C o mp o s i ti o n................................................ -

6*7 l

Alternates.................................................

6-7 l

Meeting Frequency..........................................

6-7 6*7 l

QuerWS.....................................................

Responsibi11 ties............*...............................

48

'R e c o rd s....................................................

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$0UTH TEKAS - UNITS 1 & 2 xviii Unit 1 - Amendment No. 3.4 d

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i REFUELING OPERATIONS l

3/4.9.13 SPENT FUEL POOL MINIMUM BORON CONCENTRATION LIMITING CONDITION FOR OPERATION 3.9.13 The boron concentration of the spent fuel pool water shall be maintained greater than or equal to 2500 ppm.

I APPLICABILITY: Whenever one or 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 assemblies 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 2500 ppm.

I

b. -

The provisions of Specification 3.0.3 are not applicable.

MyEILLANCE REQUIREMENTS 4.9.13 The boron concentration of the spent fuel pool shall be determined by chemical analysis at least once per 7 days.

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SOUTH TEXAS - UNITS 1 & 2 3/4 9-17 Unit 1 - Amendment No. 49,104 l

Unit 2 - Amendment No. 82,91 l

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i REFUELING OPERATIONS BASES l

3/4.9.12 FUEL HANDLING BUILDING EXHAUST AIR SYSTEM - BASES Examples of onsite emergency power sources that satisfy this requirement are: In all MODES / CONDITIONS, (a) OPERABLE ESF diesel generator for the associated 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 requried filter train loads in conjunction with an ESF diesel.

l 3/4.9.13 SPENT FUEL POOL MINIMUM BORON CONCENTRATION The spent fuel racks have been analyzed in accordance with the methodology contained in WCAP-14416-NP-A,' Westinghouse Spent Fuel Rack Criticality Analysis Methodology",

Revision 1, November,1996. This methodology ensures that the spent fuel rack multiplication i

factor,4 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 4 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, bumup, Integral Fuel Bumable Absorbers, decay time, RCCAs, and soluble boron, to ensure that 4 is maintained s 0.95, including uncertainties, tolerances, and accident conditions. In addition, the spent fuel pool 4 is maintained < 1.0 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 i

fuel assembly in the same checkerboard pattern at the location of the assembly with the inadvertently withdrawn RCCA.

The soluble boron concentration required to maintain 4 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 nominal 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 bless than or equal to 0.95 due to this fuel mistoad accident is 2200 ppm. The 2500 ppm limit specified in the LOO bounds the 2200 ppm required for a fuel mieload accident.

A spent fuel pool bcron 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 4 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.

SOUTH TEXAS - UNITS 1 & 2 B 3/4 9-4 Unit 1 - Amendment No. 40,00,71,104 Unit 2 - Amendment No. 0e;69;60,91

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DESIGN FEATURES l

5.3 REACTOR CORE i

FUEL ASSEMBLIES 5.3.1 The reactor core shall contain 193 fuel assemblies. Each fuel assembly shall consist of a matrix of zircaloy or ZlRLO clad fuel rods with an initial composition of natural or slightly enriched uranium dioxide as fuel material. Limited substitutions of zirconium alloy, ZlRLO or.

stainless steel filler rods for fuel rods, in accordance with NRC-approved applications of fuel rod configurations, may be used. Fuel assemblies shall be limited to those fuel designs that have i

been analyzed with applicable NRC staff-approved codes and methods, and shown by tests or i

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.

CONTROL ROD ASSEMBLIES 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 i

silver-indium-cadmium are not permitted within a bank. All control rods shall be clad with stainless steel tubing.

l 5.4 - (NOT USED) j i

5.5 METEOROLOGICAL TOWER LOCATION '

5.5.1 The meteorological towers shall be located as shown on Figure 5.1-1.

7 5.6 FUEL STORAGE 5.6.1 CRITICALITY 5.6.1.1 The spent fuel storage racks are designed and shall be maintained with:

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SOUTH TEXAS - UNITS 1 & 2 5-6 Unit 1 - Amendment No. 2,10,10,40, 6+;65;e9;99;98,104 Unit 2 - Amendment No. em 54;96;99;65,91

o DESIGN FEATURES a.

Lless than 1.0 when flooded with unborated water, which includes an allowance for uncertainties as described in WCAP-14416-NP-A.

b.

hiess than or equal to 0.95 when flooded with water borated to 700 ppm, which includes an allowance for uncertainties as described in WCAP-14416-NP-A.

c.

These requirements (a and b above) shall be met by storing fuel in 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 presence of soluble boron in the spent fuel pool water, per Specification 3.9.13, to mitigate the misloading of one or more fuel assemblies, as described in Specification 5.6.1.6.

d.

A nominal 10.95 inches center to center distance between fuel assemblies in l

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.

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5.6.1.2 Prior to insertion into the spent fuel storage racks, each fuel assembly shall be categorized by reactivity, as discussed below, or be designated as a Category 1 fuel assembly.

All fuel enrichment values are initial nominal uranium-235 enrichments. The reactivity categories are:

CATEGORY 1:

Fuel in Category 1 shall have an initial nominal enrichment of less than or equal to 4.95 w/o.

l CATEGORY 2:

Fuel in Category 2 shall meet at least one of the following criteria:

1) an initial nominal enrichment of less than or equal to 4.85 w/o; or, 2) a minimum burnup 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 (IFBA) pins, as shown on Figure 5.6-3.

The IFBA pin requirements shown in Figure 5.6-3 are based on nominal IFBA linear B loading of 1.57 mg-B'0/ inch (1.0X). For higher IFBA loadings up to 2.35 mg-B/ inch (1.5X), the required number of IFBA pins per assembly may be reduced by the ratio of the increased B

l loading to the nominal 1.57 mg-B/ inch loading. A full length IFBA is 168 inches long, and a j

part length IFBA is greater than 120 inches long.

I SOUTH TEXAS - UNITS 1 & 2 5-7 Unit 1-Amendment No. e;49;6t,104 Unit 2 - Amendment No.Se;56S1

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DESIGN FEATURES CATEGORY 4:

Fuel in Category 4 shall meet at least one of the following criteria:

1) an initial nominal enrichment of less than or equal to 2.50 w/o; or, 2) an mhlmum burnup as shown in Figure 5.6-4; or, 3) a mini'num number of IFBA pins, as shown on Figure 5.6-5, The IFBA pin requ rements shown in Figure 5.6-5 are based on nominal IFBA linear B loading of 1.57 mg-B/inen (1.0X). For higher IFBA loadings up to 2.35 mg-B/ inch (1.5X), the required number of IFBA pins per assembly may be reduced by the ratio of the increased B'*

loading to the turninal 1.57 mg-B/ inch loading. A full length IFBA is 168 inches long, and a part length IFRA is greater than 120 inches long.

CATEGORY 5:

Fuel in Category 5 shall meet a 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 bumup as shown on Figure 5.6-6.

@TEGORY 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; or 2) a minimum burnup as shown on Figure 5.6-7.

CATEGORY 7:

Fuel in Category 7 shall meet a least one of the following criteria:

1) an initial nominal enrichment of less than or equal to 1.65 w/o; or 2) a minimum bumup as shown on Figure 5.6-8.

4 CATEGORY 8:

Fuel in Category 8 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 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 of less than or equst to 1.40 w/o; or 2) a minimum burnup as shown on Figure 5.6-10.

SOUTH TEXAS - UNITS 1 & 2 5-8 Unit 1 - Amendment No. 49,104 Unit 2 - Amendment No. ee,91

_ _. _ _ _. _ _ _. _ _ _. _. _. _ _ _ _ _. _ _ ~ _ _ _ _ _ _

DESIGN FEATURES CATEGORY 10-4 Fuel in Category 10 shall meet a least one of the following criteria:

1) an initial nominal enrichment of less than or equal to 1.40 w/o; or 2) a minimum bumup as shown on Figure 5.611.

CATEGORY 11:

Fuel in Category 11 shall meet at least one of the following criteria:

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1) an initial nominal enrichment of less than or equal to 1.20 w/o; or 2) a minimum bumup and decay time since shutdown as shown on Figure 5.6-12.

l Data points for the curves presented in Figures 5.6-1 through 5.6-12 are presented in tables on

' the respective figures. Linear interpolation between table values may be used for intermediate points.

5.6.1.3 Region 1 racks may be used to store Category 1,3,4, 6, and 10 fuel. The fuel in Region 1 shall be stored in accordance with Figures 5.6-13,5.6-15, and 5.6-16.

Empty water cells may be substituted for fuel assemblies in all cases.

Empty water cells may be used to store non-fissile items provided that: the cells are not face adjacent to a cell storing a fuel assembly, or an evaluation has been performed that supports storage of the non-fissile item.

5.6.1.4 Region 2 racks may be used to store Category 2,5,7,8,9, and 11 fuel. The fuelin Region 2 shall be stored in accordance with Figures 5.6-14,5.6-17,5.6-18, and 5.6-19.

Empty water cells may be substituted for fuel assemblies in all cases. Non fissile items may be stored in empty water cells per the provisions of Specification 5.6.1.3.

5.6.1.5 Storage Configuration Interface Requirements. Fuel storage patterns used within Region 1 shall comply with the interface requirements shown in Figures 5.6-15 and 5.6-16.

Fuel storage patterns used within Region 2 shali comply with the interface requirements shown in Figures 5.6-17 through 5.6-19. At the interface between Region 1 and Region 2 cna iow of empty water cells shall be maintained between the Regions. The empty water cell row can be positioned in either Region. Non-fissile items can be stored in the empty water cells per the provisions of Specification 5.6.1.3.

5.6.1.6 The minimum boron concentration of 2500 ppm specified by Specification 3.9.13,

" Spent Fuel Pool Minimum Boron Concentration' bounds the boron concentration of 2200 ppm required for the most limiting fuel misloading and also assures that the rack K., limit in Specification 5.6.1.1.a will not be violated.

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SOUTH TEXAS - UNITS 1 & 2 5-9 Unit 1 - Amendment No. 49;6+,104 Unit 2 - Amendment No. 09;56,91

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4 DESIGN FEATURES 5.6.1.7 The new fuel storage racks are designed and shall be maintained with:

a.

A K,n equivalent to less than or equal to 0.95 when flooded with unborated water and less than or equal to 0.98 when filled with aqueous foam moderation (Iow density water). This requirement shall be met by limiting the fuel assembly nominal l

enrichments to 5.0 w/o orless, b.

A nominal 21 inches center to center distance between fuel assemblies.

5.6.1.8 The in-containment fuel storage racks are designed and shall be maintained with:

a.

A K., equivalent to less than or equal to 0.95 when flooded with unborated water.

This requirement shall be met by satisfying at least one of the following criteria:

1) a maximum initial fuel assembly nominal enrichment to 4.5 w/o or less; or, l

2) a minimum number of Integral Fuel Burnable Absorbers (IFBA), as a function of initial nominal assembly enrichment, as shown on Figure 5.6-20, or a K, of less than or equal to 1.484. The fuel assembly K, shall be based on a unit assembly configuration (infinite in the lateral and axial extent) in the reactor core geometry, assuming unborated water at 68'F.

The IFBA pin requirements shown in Figure 5.6-20 are based on a nominal j

IFBA linear B loading of 1.67 mg-B/ inch. For higher IFBA linear B

loadings, the required number of IFBA pins per assembly may be reduced by the ratio of the increased B loading to the nominal 1.57 mg B' / inch loading.

b.

A nominal 16 inches center to center distance between fuel assemblies.

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 5.6.3 The spent fuel storage pool is designed and shall be maintained with a storage capacity limited to no more than 1969 fuel assemblies.

SOUTH TEXAS - UNITS 1 & 2 5-9a Unit 1 - Amendment No. 6+,104 Unit 2 - Amendment No. 50S1

Minimum Burnup for Category 2 Fuel Region 2 250 3

t Initial Minimum Enrichmont Bumup (w/d (MWD /MTU)

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50

/

UNACCEPTABLE

~

l l

/

l l

0 4.80 4.85 4.90 4.95 5.00 initial U-235 Enrichment (nominal wIo)

Figure 5.6-1 (nQ 1 ~

"k

  • . kN SOUTH TEXAS - UNITS 1 & 2 5-10 2-n n

O Minimum Burnup for Category 3 Fuel Region 1 10,000 Initial Minimum Enrichment Bumup 9,000 Z (wlo)

(Mwo/MTU) 3.55 0

f 4.00 2456

/

8,000 4.50 5414 f

Z 5.00 8598

/

-:s

/

g 7,000 f

/

_ 6,000

/

g2.

/

3

/

E s

5,000

/

m ACCEPTABLE f

b

/

.c

/

E 4,000

/'

E

/

f

'iii 3,000

/

5

/

/

2,000 j

UNACCEPTABLE

/

/

1,000 f

/

/

/

0 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)

I Figure 5.6-2 SOUTH TEXAS - UNITS 1 & 2 E 11 Unit 1 - Amendment No 43*104 Unit 2 - Amendment No 32,9T

Minimum IFBA for Category 3 Fuel Region 1 160 150 Initial IFBA IFBA Enrichment Pins Pins (w/o) 1.0(X IFbA (PL) 7 FL) art 1.0X IFBA Length 140 Full Len9th 3.55 0

0 Z

130 38 5

7 3.8 24 33 l

/

4 42 59 120 4.2 s1 85 D

4.4 80 111 i

4.6 98 137

/

E 110 4.8 117 nts e

5 135 n/a l

l y;

i

< 100 u

l E. 90

/

e c

l E

80 ACCEPTABLE

/

l l

70 l

60

/

l l

.I E

50

,/

l UNACCEPTABLE 2

40

/

l l

30 l

l' l l 20 ll ll 10 ll' 0

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 Unit 1 - Amendment No. 43,104.

Unit 2 - Amendment No. 83,91

- - - - - - ^

Minimum Burnup for Category 4 Fuel Region 1 25,000

-~

initial Minimum l

Enrichment Bumup (w/o)

(MWDMTU)__-

f i

2 2.5 0

/

3.0 4955

/

20,000 l

3.5 9490

/

-~

4.0 13790

/'

3 4.5 18063

-~

5.0 22278

/

f f

/

_ 15,000 a.

/

j

/

/

=

ED ACCEPTABLE x3 2

/

~

E 10,000

/

a

)/

4

'lii

/

5

/

/

5,000

/

UNACCEPTABLE

/

/

/

0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Initial U-235 Enrichment (nominal wlo)

Figure 5.6-4 SOUTH TEXAS -UNITS 1 & 2 5-13 Unit 1 - Amendment No. 43,104 Unit 2 - Amendment No. 83,91

Minimum IFBA for Category 4 Fuel Region 1 170 i

i Part Full 160

,,, Initial IFBA IFBA t.ngtn L.neth :

  1. I 150 E

1.oEdBA

?BA

[

1.0 140 2

2.s o

o

/

2.6 13 18 2.8 38 54 i

130 3.o e4 8e

/

/

h 3.2 8e 125

/

2 120 E

8 37 n/a 1ss f

f h

3.4 114 n/a

/

" 110 3.72 156 n/a

' 100

/

/

E

/

l

.E. 90 A

ACCEPTAliLE

,/

80 m

,/

l g

70

/

o

/

l 60

/

,/

3

/

e' UNACCEPTABLE E

50

/

/ /

40

/

30

/ /

/

20

//

10

[

0 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 i

Initial U-235 Enrichment (nominal w/o)

Figure 5.6-5 SOUTH TEXAS - UNITS 1 & 2 5 14 Unit 1 - Amendment No. 43,104 Unit 2 - Amendment No. 32.91

Minimum Burnup for Category 5 Fuel Region 2 40,000 Initial Minimum Enrichment Bumup f

~~

(*' )

(M***)

/'

35,000

)

1.7 0

/

1.8 1746

/

2.0 5032

/'

2.2 7976

/

~ 30,000 3

2.4 10613 j

2.5 11839 j

j o

2.6 13012 I

/

E 25,000 3.0 17363 f

E 3.5 22609

/

E 4.0 27839 j/

2 4.5 32812

/r E

5.0 37542 i

g 20,000

/

.n.

/

j ACCEPTABLE

/

$ 15,000 y

f

'lii

)[

a

"- 10,000

/

/

/

UNACCEPTABLE

/

5,000

[

/

/

f 0

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 Unit 1 - Amendment No. 43.104 Unit 2 - Amendment No. 32,91

...e..

  • = = = - = =

Minimum Burnup for Category 6 Fuel Region 1 i

45,000 y

Initial Minimum Enrichment Bumup

/

40,000 (w/o)

(MWD /MTU)

/

/

1.7 0

/

2.0 5641

/

35,000 2.2 8986

[

2.4 11954

/

3 2.5 13318

/

I 30,000 4.0 30965

/

2.6 14619

/

3.0 19444

/

3.5 25280

/

~

4.5 36382

/

@ 25,000 5.0 41547

/

E

/

3

/

m s

b 20,000

/'

j ACCEPTABLE

/

e

/\\

e

/

E 15,000

/

1

/

z

/

LL

/

10,000

/'

/

UNACCEPTABLE

/

/

5,000

/

1 i

),

0 1.0 2.0 3.0 4.0 5.0 Initial U-235 Enrichment (nominal w/o) l Figure 5.6-7 SOUTH TEXAB -UNITS 1 & 2 5 16 Unit 1.- Amendment No. 64,104: i.

Unit 2 - Amendment No. 60,91

Minimum Burnup for Category 7 Fuel Region 2 60,000 Irdtlal Minimum 55,000 Enrichment Bumup (w/o)

(MWD /MTU) 50,000 1.65 o

1.8 4366 2.0 9594

/

45,000 2.2 14013 2.4 17546

/

2.5 19045 e

40,000 2.s 20392

/

3.0 25096

/

3.5 31083

35,000 4.0 37157

/

3 4.5 42826

/

E 5.0 48158 s 30,000

/

m i

b l

j 25,000 ACCEPTABLE /,/

.m

< 20,000

/

e Ti s

i

  • 15,000

/

l

^

^

10,000

/

l 1

5,000

/

l 0

1.0 2.0 3.0 4.0 5.0 initial U-235 Enrichment (nominal w/o)

Figure 5,6-8 t

SOUTH TEXAS - UNITS 1 & 2 5-17 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91

== :.

Minimum Burnup for Category 8 Fuel Region 2 55,000 Initial Minimum Enrichment Bumup 50,000 (w/o)

(MWD /MTU) 2 1.4 0

45,000 1.6 4524

/

1.8 8678

/

2.0 12391 40,000 2.2 15624

/

2.4 18456

[

2.5 19755

/

i 35,000 2.6 20996

/

3.0 25634

/

i

{

3.5 31396

/

I 3 30,000 4.0 37084

/

(

l E

4.5 42471 e

l 5.0 47589

/

.;t,25,000 ll llll ll y

j ACCEPTABLE

/

j e

g 20,000

/

g

/

UNACCEPTABLE 2 15,000

/'

/

r 1

i i

10,000

/

1

/

f 5,000

/

I J

11 l

0 1.0 2.0 3.0 4.0 5.0 l

initial U-235 Enrichment (nominal w/o)

Figure 5.6-9 SOUTH TEXA8 - UNITS 1 & 2 5 18 Unit 1 - Amendment No.104' Unit 2 - Amendment No. 91

i Minimum Burnup for Category 9 Fuel i

Region 2 60,000 Initial Minimum 55,000 Enrichment Bumup (w/o)

(MWD /MTU) 50,000 1.4 0

/

1.6 5346 e

e 1.8 10179 e

45,000 2.0 14398 e

ZZ 2.2 17943 j

2.4 20931

/

40,000 2.5 22266 ZZ 2.6 23521

/

3.0 28146

/

- 35,000 3.5 34039

/

a.

7 m

4.0 39969 i

4 E

4.5 45571 s 30,000 5.0 50898

/<

m i

b l

l 25,000 ACCEPTABLE

,i e

s' E 20'000

/

e UNACCEPTABLE i

n 1

' 15,000

/

f I

10,000

/

f J

I 5,000

/

r i

I O

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 Unit 1 - AmenJaent No.104 Unit 2 - Amendment No. 91

Minimum Burnup for Category 10 Fuel Region 1 65,000 Initial Minimum 60,000 Enrichment Bumup (w/o)

(MWD /MTU)

/

55,000 1,4 o

/

1.6 5273

/

50,000 1.s 10019 j

2.0 14145 2.2 17652 45,000 2.4 20705 e

1 40,000 2.5 22143 f

2.6 23561 3.0 29329

/

,/

m.

3.5 36715 8E 35,000 4.0 44096

,f 4.5 51352 j

5.0 58325

/

b 30,000

,,,j,..

/

j E

ACCEPTABLE e'

e 25,000 ee4

- 20,000

/

UNACCEPTABLE I

,/

u.

15,000 r,'

10,000

/

i 5,000

/

ll 0

1.0 2.0 3.0 4.0 5.0 initial U-235 Enrichment (nominal w/o)

Figure 5.6 M SOUTH TEXAS - UNITS 1 & 2 5 20 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91

Minimum Burnup far Cat': gory 11 Fu:1 Region 2 60,000 Ovaar s

,y 2 year

' 'u 5 year 50,000

/f_ ;.

10 year 15 year L"

20 yeer

""6 3

ACCEPTABLE

,,',- ;,55 40,000

- -=

1

= ~

l 30,000

'7 G

-~

x

1 E"2"'

"' ~'

n,l 20'000

,f'E"~

UNACCEPTABLE 4'

~ ' '

l y

1

-,=r

-/:

' 10,000 y

1 i

\\

0 s

4 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) i Initial Minimum Bumup (MWDMTU)

Enrichment (w/o) 0 year 2 year 5 year 10 year 15 year 20 year l

12 0

0 0

0 0

0 1.4 6533 6188 5807 5384 5113 4937 1.6 11912 11298 10613 9643 9347 9018 1.8 16021 15221 14313 13282 12606 12149 2.0 19209 18285 17221 15992 15177 14611 2.2 22150 21130 19939 18543 -

17600 18952 4

2.4 24M8 23888 22500 21050 20012 19276 I

2.6 27F32 26583 25173 23507 22377 21574 2.8 3030 29186 27686 25912 24700 23838

+

3.0 32967 31000 30126 28200 20073 20057 3.2 35474

-34107 32495 30550 29192 28226 3.4 37919 36481 34803 32787 31363 30348 j

3.6 40314 38807 37064 34981 33493 32432 2

3.8 42000 41098 39291 37138 35591 34485 j

4.0 44995 43388 41499 39267 37064 38514 4.2 47300 45629 43697 41374 M1l; 38525 4.4 49582 47878 45885 43459 41753 40518 4.6 51838 50112 48056 45519 43785 42489

}

4.8 54085 52325 50238 47550 45753 44437 j.

5.0 5625e 54513 52338 49551 47713 46358 j

Figure 5.8-12 3

)

SOUTH TEXAS - UNITS 1 & 2 5-21 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91 4

. + A, M '* :- -- T ' ~~

~^

R:ginn 1 All C:ll

.i.

.+

Category category 4,6,10 4,6,10

'da C

.:- ~,. :

Category Category 4,6,10 4,6,10 ;

3:

n. g y., r Region 1 Checkerboard #1 9#' #A pCategoryj : Category ::
3,4,6,10 p, 6,10

/ : :

ll

{

/ Categoryj

Ca'tegoryj 6,10

/

)

3,4,6,10 i

Region 1 Checkerboard #2 i

'/////)

/

/ Category /

Category 8,10 4,6,10 1

))

E'; :.Ar!.? 3 I1,3,4,6,10 Category Category 10 Note:

These configurations can be rotated (90*,180*,270*)

provided that configuration interface requirements are satisfied.

Allowable Fuel Categories for Region 1 Configurations Figure 5.6-13,

SOUTH TEXAS - UNITS 1 & 2 5 22 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91 l

R:gi:n 2 All C:ll Category Category 11 11 Category Category 11 11 Region 2: 3-of-4 Storage Region 2: 2-of-4 Storage

, =,

r,

. Category

!s,7,$$,$1 !

Empty 2, 5,7 Empty 8, e,11 m......n

!s,7,$5,31 i !s[7, e,l1 Empty

,a Region 2 RCCA Checkerboard #1 Region 2 RCCA Checkerboard #2

/,f,f,f,/,// ///////

s.

,-n..

Category /

l Category l Category Category

/

9

,g 7, 9 g

with RCCAl with RCCA I///////

~. \\ ~~ ~ 4 ll////b f////k g,,

/Categoryj Categoryj 7,,

Category y 8

8 with RCCA I' 8

/

/

/

x34.p ,y 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: cell locations 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 i

Figure 5.614 SOUTH TEXAS - UNITS 1 & 2 5-23 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91

_ _.... _ _ _. ~ _

Region 1 Boundary Between All Cell Storage and Checkerboard #2 C

i Category 10 Interface

\\

Category 6 or to Category 4, 6, or 10

-[

Category 1,3,4,6, or 10

-;2 Region 1 Boundary Between All Cell Storage and Checkerboard #1 l

Interface

\\

Category 6 or 10 Category 4,6, or 10 h -lh Category 3,4,6, or 10

.:s 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 ceII.

3.

See Specification 5.6.1.3 for provisions for storing non fissile materialin empty cells.

Figure 5.615 SOUTH TEXAS - UNITS 1 & 2 5 24 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91

- - _ _.. _.=,,...,.= = - - ---

4 Region 1 Boundary Between Checkerboard #1

~

and Checkerboard #2

!!N5NI

!NN!!!

!N!!!!!!

n=
-
=:::::

"""~

MEEE iE!EE iimm EEm smm!

Category 10

-m==

==w m==m interface s5=a sam 3 iimm:

\\

lHHHi!

!HH.i!

!!E!.!.!.!!..

Category 6 or 10

- - -.e

::.

= :.

lhk kbbhb lHHHi!

Category 4,6, or 10 i.........'"""".......

~

sim sis:

ms i.iiE.Ei

!!.!!!.!!.!!i.

!!.!.!!.!.!.;.;. Category 3, 4,6, or 10

.g kbhbbbb r* '

jjHjHj Category 1, 3, 4, 6, or 10 Region 1 Boundary Between Checkerboard #2 and Checkerboard #1 g

Category 10 Interface

(

Category 6 or 10

{

'7 Category 4, 6, or 10 E

smi

===

e mi EE EE Category 3,4,6, or 10

==s

==:nn

!$....!..5..

Category 1, 3, 4, 6, or 10

~

Note:

i.

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 materialin empty cells.

Figure 5.6-16 SOUTH TEXAS -UNITS 1 & 2 5 25 Unit 1 - Amendment No.104 Unit 2 - Amendment No. 91 i

.. = -.

1 l

6 Reglen 2 Boundary Between All Cell

_ Storage and 3-out-of-4 Storage i

Interface

-=

"'==

nmni Empty Empty Category 5, 7, 8, 9, or 11

'"!!E!!' 56

!!!!E!!!!

l l55 l :::

1, Empty !!!!!!!!!

Empty

!!nn;;:

i Region 2 Boundary Between All Cell

~

Storage and 2-out-of-4 Storage

==

~

Interface

"""=

\\

Category 11

!!!!!!!l Empty Empty Category 5, 7, 8, 9, or 11 Empty

'j.

Category 2, 5, 7, 8, 9, or 11 6

muma ammum Empty Empty

' 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 5.6.1.4 for provisions for storing non-fissile material in empty cells.

Figure 5.6-17 SOUTH TEXAS UNITS 1 & 2 5 26 Unit 1 - Amendment blo.104 Unit 2 - Amendment Ifo. 91

u....

-. =.

= _;

Region 2 Boundary Between All Cell Storage and RCCA Checkerboard #1

)

.1

=======: :- :-

Interface

\\

Category 11 Empty EmM Category 9 fJ

//

n Category 9 with an RCCA g

Em-i i

f Region 2 Boundary Between All Cell Storage and RCCA Checkerboard #2

=:

i Interface j

\\

Category 11 j

Empty Empty Category 7 or 9

{

Q acc^

Category 7 or 9 with an RCCA mems mumm j

g Empty

(

)

Note:

1.

A row of empty cells can be used at the Interface to sexrate the configuradons.

2.

It is acceptable to replace an assembly with an empty cell.

3.

See Specificadon 5.6.1.4 for provisions for storing non-Asslie material In empty cells.

Figure 5.6.

SOUTH TEXAS -UNITS 1 & 2 5 27 Unit 1 - Amendment No.104 Unit T - Amendment No. 91

i Region 2 Boundary Between 2-out-of-4 and 3-out-of-4 Storage iii!!!!!

Empty Empty siiiiii: Empty

~

l'lllll Interface

!!ggi;

"'"I'-

m niiiisi

\\-

jjjjjjj Empty Empty Empty ijjjjjjj Category 5, 7, 8, 9, or 11

==""

manza mm::

i Empty b

Empty A

Category 2, 5, 7, 8, 9, or.11 w

---e n -.

F li-Empty Empty Empty Empty Region 2 Boundary Between RCCA Checkerboard Storage Patterns M

M M

I M

M g

Category 9 Interface g

g g

'accA Category 9 with an RCCA

/

m b

Category 7 Or 9

'RcCA

===

[ B M

M Category 7 or 9 with an RCCA 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 5.6.1.4 for provisions for storing non-fissile materialin empty cells.

Figure 5.6-19 SOUTH TEXAS - UNITS 1 & 2 5 28 Unit 1 - Amendment No. 104 Unit 2 - Amendment No. 91

.-~-

1 Minimum IFBA Content for in-Containment Rack Fuel Storage 40 i

Initial Minimum

/

Enrichment Content of

/

(WIo)

IFBA Pins

,30 f

e g

1 E

4.5 0

/

q 4.6 8

/

~m 4.7 15 r

E 4.8 22

/

o 4.9 29

/

6 5.0 36

.E 20

/

E

/.

ACCEPTABLE

/

E j

E

/

10 UNACCEPTABLE 7

/

/

0 4.5 4.6 4.7 4.8 4.9 5.0 I

initial Enrichment (w/o)

Assemblies with an initial enrichment less than 4.5 w/o are ACCEPTABLE 4

Figure 5.6-20 south TEXAS - UNITS 1 & 2 5 29 Unit 1 - Amendment No. 64,IOC Unit 2 - Amendment No. 50,91

.-=:"**

~ ~ ~ ~

DESIGN FEATURES 5.7 COMPONENT CYCLIC OR TRANSIENT LIMIT l

I 5.7.1 The components of the reactor coolant system are designed and shall be maintained within limits addressed in the Component Cyclic and Transient Limit Program as required by specification 6.8.3f.

l 1

r I

i i

l i

SOUTH TEXAS - UNITS 1 & 2 5-30 Unit 1 - Amendment No. W);46;6+,104 Unit 2 - Amendment No.09;95;50,91

,-

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