ML20100F316

Rev 0 to River Bend Station,Cycle 7,COLR,Feb 1996

ML20100F316
Person / Time
Site:	River Bend
Issue date:	02/29/1996
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20100F314	List: ML20100F316 ML20100F319 RBG-42462, Forwards Rev 0 to River Bend Station,Cycle 7,COLR, Feb 1996 & Rev 0 to 24A5188, Supplemental Reload Licensing Rept for River Bend Station Reload 6,Cycle 7
References
NUDOCS 9602210145
Download: ML20100F316 (18)

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. _..

l Page 1 of19 RBS CYCLE 7 COLR Revision 0 RIVER BEND STATION, CYCLE 7 CORE OPERATING LIMITS REPORT (COLR) l February 1996 1

/2M288 PREPARED BY:

Date:

Respo'nsible Engineer i

REVIEWED BY:

4 4/$N M 2/> >-

Date: /2////96 Review Engineer

/3I&!b APPROVED BY:

/ 8d Date:

Manager - Safety & Engineering Analysis APPROVED DY:

Date:

Director, Engineering River Bend Nuclear Station jD b

/

l APPROVED BY:

Date:

/

I Facilities Review Commihee 1

River Bend Nuclear Station 9602210145 960209 ADOCK0500g8 DR

Page 2 of19 RBS CYCLE 7 COLR Revision 0 INTRODUCTION AND

SUMMARY

This report provides the values of the AVERAGE PLANAR LINEAR HEAT GENERATION RATE (APLHGR) limits, the core flow dependent MINIMUM CRITICAL POWER RATIO (MCPR) limits, MCPR, the thermal f

power dependent MCPR limits MCPR, the LINEAR HEAT GENERATION i

p RATE (LHGR) limits, APRM Gain and setpoint information, and the REACTOR PROTECTION SYSTEM (RPS) response time for APRM thermal time constant for River Bend Station, Cycle 7 as required by Technical Specifications. Technical Specifications require these values be determined using NRC-approved methodology and are established i

such that all applicable limits of the plant safety analysis are met.

Control Rods The River Bend core utilizes both GE original equipment and ABB CR-82M bo.ttom entry cruciform control rods. These Control Rod designs are discussed in more detail in reference 8.

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Page 3 of 19 RBS CYCLE 7 COLR Revision 0 TECHNICAL SPECIFICATION 3.2.1 POWER DISTRIBUTION LIMITS AVERAGE PLANAR LINEAR HEAT GENERATION RATE (APLHGR)

The limiting APLHGR value for the most limiting lattice (excluding natural uranium) of each fuel type as a function of AVERAGE PLANAR EXPOSURE is given in Figures 1,2,3,4,5,6 and 7. These values were determined with the SAFE /REFLOOD LOCA methodology described in GESTAR-il (Reference 1). Core location by fuel type is provided in Figure 11 and is the reference core loading pattern in reference 3. These figures are used if alternate calculations are required. The limits of these figures shall be reduced to a value of 0.84 times the two recirculation loop operation limit when in single loop operation (Reference 4).

4 4

Page 4 of 19 RBS CYCLE 7 COLR Revision 0 TECHNICAL SPECIFICATION 3.2.2 POWER DISTRIBUTION LIMITS MINIMUM CRITICAL POWER RATIO (MCPR)

The MCPR limits for use in Technical Specification 3.2.2 for flow dependent MCPR (MCPR ) (reference 5, 9), power dependent MCPR f

(MCPR )(reference 5) are shown in Figures 8,9 and 10. These values p

were determined with the GEMINI methodology and GEXL-PLUS critical power ratio correlation described in GESTAR-Il (Reference 1) and are consistent with a Safety Limit MCPR of 1.07.

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Paga 5 of 19 RBS CYCLE 7 COLR Revision 0 TECHNICAL SPECIFICATION 3.2.3 POWER DISTRIBUTION LIMITS LINEAR HEAT GENERATION RATE (LHGR)

The LHGR limits for use in Technical Specification 3.2.3 are 14.4 kw/ft for GE8x8EB and GE11 (Reference 6). The GE8x8EB fuel consists of fuel types: GE88-P8 SOB 333-10GZ-120M-4WR-150-T, GE8B-P8SQB334-10GZ-120M-4WR-150-T, GE8B-P8SQB334-10GZ2-120M-4WR-150-T and GE88-P8SQB334-11GZ-120M-4WR-150-T. The GE11 (9x9) fuel consists of GE11-P9SUB354-14GZ-120T-146-T, GE11-P9SUB354-13GZ-120T-146-T and GE11-P9SUB353-10GZ-120T-146-T. Core location by fuel type is provided in Figure 11.

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RBS CYCLE 7 COLR Revision 0 TECHNICAL SPECIFICATION TABLE 3.3.1.1-1 The simulated thermal power time constant for use in Technical Specification Table 3.3.1.1-1, SR 3.3.1.1.14, is (Reference 7):

6 i O.6 seconds.

The maximum simulated thermal power time constant for use in Technical Specification surveillance Table 3.3.1.1-1, SR 3.3.1.1.14 is:

6.6 seconds

Page 7 of 19 RBS CYCLE 7 COLR Revision 0 TECHNICAL SPECIFICATION 3.2.4 POWER DISTRIBUTION LIMITS Averaae Power Ranae Monitor (APRM) Gain and Setooints The APRM Gain and Setpoint information below was transferred from Technical Specifications as part of implementation of Improved Technical Specifications in October of 1995. For APRM flow biased simulated thermal power-high scram trip setpoints and/or the flow biased neutron flux-upscale control rod block trip setpoint adjustment for the condition T <

1.0, the following relationships apply:

Two Recirculation Loop Operation Trio Setooint Allowable Value S s (0.66W + 48%)T S s (0.66W + 51%)T Sns s (0.66W + 42%)T Saa s (0.66W + 45%)T Single Recirculation Loop Operation Trio Setooint Allowable Value S s (0.66W + 42.7%)T S s (0.66W + 45.7%)T Sns s (0.66W + 36.7%)T Saa s (0.66W + 39.7%)T l

where:

S and Sas are in percent of rated thermal power, W = Loop recirculation flow as a percentage of the loop recirculation flow which produces a rated core flow of 84.5 million Ibs/hr, T is defined in Technical Specification Basis section B 3.2.4

Page 8 of19 RBS CYCLE 7 COLR Revision 0 REFERENCES 1)

NEDE-24011-P-A, " General Electric Standard Application for Reactor Fuel,"(latest approved version).

1 2)

Letter, C.O. Thomas to J.S. Charnley, " Acceptance for Referencing of Licensing Topical Report," NEDE-24011-P-A-6, Amendment 10, General Electric Standard Application for Reload Fuel, May 28,1985.

3) 24A5188, Rev. O " Supplemental Reload Licensing Report for River Bend Station Reload 6/ Cycle 7" November 1995.

4)

" Single-Loop Operation Analysis for River Bend Station, Unit 1," NEDO-31441, May 1987, 5)

Letter, Hoa Hoang to Gary Scronce, " Additional Specifications for River Bend Station MCPR(P) and MCPR(F) Limits for Cycle 7 Application" 1 ENOM-2395. December 7,1995.

6)

FC# 818R46," RIVER BEND RELOAD 6 DESIGN EXPOSURE CYCLE

SUMMARY

" June 1995.

7)

Letter, R.E. Kingston to G. W. Scronce, " Time Constant Values for Simulated Thermal Power Monitor" GFP-1032 November 30,1995.

8)

RBS USAR Section 4.1 9)

Letter, Hoa Hoang to Gary Scronce, " River Bend Station MCPR(F) Limits for Cycle 7 Application" 1ENOM-2195. December 6,1995.

l l

Page 9 of 19 RBS CYCLE 7 COLR Revision 0 FIGURE 1 MAXIMUM AVERAGE PLANAR LINEAR HEAT GENERATION RATE (MAPLHGR) VERSUS AVERAGE PLANAR EXPOSURE GE88 P8SQB333-10GZ-120-M 4WR-150-T 14 I

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FIGURE 9 OPERATING LIMIT MCPR (MCPR,)

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FIGURE 10 OPERATING LIMIT MCPR (MCPR,)

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