ML20043F632

Rev 0 to Unit 1 Cycle 3 Core Operating Limits Rept.

ML20043F632
Person / Time
Site:	South Texas
Issue date:	05/01/1990
From:	HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20043F627	List: ML20043F626 ML20043F632
References
NUDOCS 9006150182
Download: ML20043F632 (5)

Text

\.

AlI AbiiliENT 1 '

ST HL-AE-3v t I

.' PAGE .1 0F 6 o,

t i

i SOUTH TU.AS PROJECT ELECTRIC CENERATING STATION I

k UNIT 1 CYCLE 3  !

CORE OPERATING LIMITS REPORT REVISION 0 1 MAY 1, 1990 1

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i 9006150182 900611 PDR ADOCK 05000498 l P PDC l

• ATTACHMENT l ST HL AE Pif I

• PAGE- 2t 0F JI SOUTH TEXAS UNIT 1 CYCLE 3 1.0 Core Operating Limits i

This Core Operating Limits Report for STPECS Unit 1 Cycle 3 has ,

been prepared in accordance with the requirements of Technical ,

Specification 6.9.1.6. The core operating limits have been developed using the b'RC approved methodologies specified in Reference 1 and 2. ,

P The following cycle specific core operating limits required by 7

Technical Specifications are included in this report:

l i

1) Control Rod Insertion Limits (F18ure 1) as required by Technical Specification 3.1.3.6. Tully withdrawn for all control and shutdown banks shall be 259 steps.

2) AFD Limits as required by Technical Specification 3.2.1 are determined by CAOC Operations with' s Delta I ' allowable [

operating band throughout Cycle 3 life of +3,126.

3) Radial Peaking Factor Limits as required by Technical Specification 4.2.2.2 are provided for cycle 3 operation in Figure 2.

Core Operating Limits Report (Rev. 0) 05/01/1990 Page 1 of 4

lT o,e .

a: n .

i ATTACHMENT 2 5' ST HL AE 34stl PAGE 2 0F 3

'l SOUTH TEXAS UNIT 1 CYCLE 3-2.0 References

1. ~ Westinghouse Reload Safety Evaluation Methodology".

WCAP.9272.P A, July 1985.

2.

• Power Distribution and Load Following Procedures",

WCAP 8385, September, 1974. ,

~3. NUREG 1346. Technical Specifications. South Texas Project, Unit Nos. 1 and 2.

Core Operating Limits Report (Rev. 0) 05/01/1990 Page 2 of 4

' ' 7M !.ithysENT j

• * . ST HL-AE 3W /

4 ,

. SOUTH TEKAS UNIT 1 CYCLE 2 PAGE 4 0F T t

FIGURE 1 .

CONTROL ROD INSERTION LI:llTS' VERSUS P0;lER LEVEL

?3,259 e/ 79,259 -

260 ,

,f /

,  ; ,. /

. 240 ',

,X, ,,,,

,., ,i i

4 4 ,

e i

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, f.i, ,/

,j j BANK B l ',-  !

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/i 220 ,, . .. ' ,

,,, ,f, ,, , , it i in

, i, , / i g... ' ' '

200 0,202 -

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i/i. ii ',

, fj 29,0 ,i i ii 0 30 40 50 60 70 80 90 100 0 10 20 RELAlivEPOWER(5)

Core Operating Limits Report (Rev 0) 05/01/93 Page 3 of 4

ATTACHMENT 1

.' ST HL-AEMF /

,- PAGE J OF 5 l'- SOUTH TEXAS UNIT 1 CYCLE 3 FICURE 2 RADIAL TEAKING FACTOR LIMITS The-Fg Ms.no for RATED THERMAL POWER within specific core planes aholl hn:-

P

1. F less. than or equal to 1.94 for all core

,y planes containing bank 'D" control rods, and TP

2. F less than or equal to 1.64 for all unrodded

,y core planes.

These F, (z) limits were used to confirm that the heat flux hot channel factor.F (z) will be limited to the Technical Specification-9 values of:

Fq (z) 5 [2.50/P) [K(z)) for P > 0.5 and, Fq (z) $ [5.00) [K(z)) for P $ 0.5 assuming the most limiting axial power distributions expected to result from the insertion and removal of control banks C and D during operation, including the accompanying variations in the axial xenon and power distributions, as described in Reference 2. Therefore, these Fx limits provide assurance that the initial conditions assumed-in the IDCA analysis are met, along with the ECCS acceptance-criteria of 10CFR50.46.

The function K(z) is given in Figure 3.2 2 of the Technical

. Specifications.

Core Operating Limits Report-(Rev. 0) 05/01/1990 PaSe 4 of 4