ML20006D352

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Core Operating Limits Rept,Dresden Station,Unit 3,Cycle 12,Rev 0
ML20006D352
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 12/31/1989
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML17202G775 List:
References
NUDOCS 9002130062
Download: ML20006D352 (21)
v • d • e


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Core Operating Limits Report Dresden Station Unit 3 Cycle 12 Revision 0 4

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.4 b g Issuance of Changes Sumary Affected Affected Section Paaes Sumary of Chana'es Date All All Oriainal Issue 12/89 a,

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Dresden Unit 3 i

December 1989

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fi e Table of Contents Page Re f e r e n c e s.................................................... i i i L i s t o f, F i g u re s............................................... i v List of Tables................................................

v-L 1.0 Control Rod Withdrawal Block Instrumentation- (3/4.2.C)..

1-1 1.1 Technical Specification Reference...

1.2 Description........................................

1-1 1-1 2.0 Average Planar Linear Heat Generation Rate (3/4.5.I)....

2-1 2.1 Technical Specification Reference.........

Description.............-...........................

2-1 i

2.2 MAPLHGR Multipliers............................

2-1 2.3 2-1 3.0 Local Steady State LHGR- (3/4.5.J)..............'........

3-1 3.1 Technical Specification Reference.......

Description.........................................

3-1

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3.2 3-l' 4,0 Local - Transient LHGR (3/4. 5.K)..........................

4-1 Technical Speci fication Reference..........

4.1 Description........................................

4-1 4.2 4-1 5.0 Minimum. Critical Power Ratio Operating Limit (3/4.5.L)..

5-1 5.1 Technical Speci fication Reference................

De s c r i p t i o n........................................

5 - 1 5.2 5-1 l-t 1

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-Dresden Unit 3 11 December 1989 1

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ll* f C References 1

1.

Commonwealth Edison Company Docket No. 50-237, Dresden Nuclear Power

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Station, Unit 3, facility Operating License DPR-25.

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Letter from D. M.'Crutchfield to All Power Reactor Licensees and Applicants, Generic Letter 88-16;. Concerning the Removal of Cycle-Specific Parameter Limits from Technical Specifications.

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4 List of Figures Fiaure Title /Descriotion Pace 2.2-1 MAPLHGR Limit versus Bundle Average Exposure -

2-2 ANF 8x8 Fuel 2.2-2 MAplHGR Limit versus Bundle Average Exposure -

2-3

'ANF 9x9 Fuel 3.2-1 Steady State Linear Heat Generation Rate 3-2 (SLHGR) Limit vs. Planar Exposure 4 ~. 2-1 Transient Linear Heat Generation Rate (TLHGR) 4-2 Limit vs. Planar Exposure for ANF'8x8 Fuel 4.2-2 Transient Linear Heat Generation Rate (TLHGR) 4-3 Limit vs. Planar Exposure for ANF 9x9 Fuel 5.2-1 MCPR Limit vs Measured Scram Time to 90%

5-2

'i insertion - Rated Flow Conditions 5.2-2 MCPR Operating Limit for Manual Flow Control 5-3 5.2-3 MCPR Operating Limit for Automatic Flow Control 5-4 I

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s List of Tables "D

Table-Title /Descriotion--

Pace

.c 1,2-1 Control Rod Withdrawal Block Instrumentation 1 Setpoints=

2,3-1 MAPLHGR Multipliers 2-4 h

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1.0 CONTROL-ROD WITHDRAWAL BLOCK INSTRUMENTATION 1.- l Technical Soecification Reference Technical Specification 3.2.C - Control Rod Block Actuation l.2 -Descriotion The Rod Block Monitor Upscale Instrumentation Setpcints' are determined from the relationships shown in -Table 1.2-1.

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Table 1.2-1

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' Control Rod Withdrawal Block Instrumentation Setpoints -

Trio Function-Trio level Settina Rod Block Monitor Upscale (Flow Bias)'

Dual loop Operation Less than or equal to (0.65 Wd plus 45)

(See Note)

Single Loop Operation Less than or equal to (0.65 Wd plus 41)

(See Note)

Note: -Wd - percent of drive flow required to produce a rated core flow of 98 Mlb/hr.

c Dresden Unit 3 1-2 December 1989 l-l'

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2.0 AVERAGE PLANAR LINEAR HEAT GENERATION RATE 2,1 'lechnical Soecification References Section 2.2: Technical Specification 3.5.1 -Average Planar LHGR Section 2.3: See Table 2.3-1 2.2-Descriotion.

The Maximum Average Planar Linear Heat Generation Rates (MAPLHGR) versus Bundle Average Exposure for ANF 8x8 fuel is determined from.

Figure 2.2-1.

The Maximum Average Planar Linear Heat Generation Rates (MAPLHGR) versus Bundle Average Exposure for ANF 9x9 fuel is determined from Figure 2.2-2.

2.3 MAPLHGR Multioliers

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The appropriate multiplicative factors to apply to the base MAPLHGR limits specified in Section 2.2 are shown in Table'2.3-1.

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Dresden Unit 3 2-1 December 1989

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r" Figure 2.2-1 MAPLHGR Limit vs. Bundle Average Exposure ANF 8x8 Fuel 1

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Bundle' Average MAPLHGR Exoosure (GWd/MTU)

Limit. Kw/ft 0

13.00 10 13.00 L

15 13.00 18 12.85 l

20 12.60 25 11.95 I

30 11.20 35 10.45 1

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Figure 2.2-2 MAPLHGR Limit vs. Bundle Average Exposure ANF 9x9 Fuel 12

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The.above graph is based on the following MAPLHGR summary for ANF 9x9 fuel design.

l-Bundle Average.

MAPLHGR Exoosure (GWD/MTU)

Limit. Kw/ft l

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11.75 10 11.40 15 10.55 20 9.70 25 8.85 30 8.00 35 7.15 40 6.30 Dresden Unit 3 2-3 December 1989

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.,a Table 2.3 '

MAPLHGR Multipliers Multiolicative Factors Soecification Title of TS Scenario' 8x8 9x9 3.5.D.2 Automatic Pressure One Relief 0.89 0.76 Relief Subsystems Valve Out of f

-Service.

t 3.5.1 and Average-Planar LHGR Single Loop 0.91 0.91 3.6.H.3.f Recirc Pump Flow-Operation Limitations 3.5.1 and Average Planar LHGR Single Loop 0.89 0.76 3.6.H.3.f Recire Pump Flow Operation and Limitations One Relief Valve Out of-Service.

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l Dresden Unit 3 2-4 December 1989

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j 3.0 LOCAL STEADY STATE LHGR 3.1 Technical Snecification Reference Technical Specification.3.5;J - Local. Steady State LHGR l

3.2' Descriotion The Local Steady State LHGR (SLHGR) limit versus Average Planar-Exposure for all resident fuel is determined from Figure 3.2-1..

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ANF 8x8 Fuel ANF 9x9 Fuel-Exoosure LHGR Exoosure LHGR-0.0 16.0 0.0 14.5 25.4 14.1 5.0 14.5 42.0-9.3 25.2 10.8 48.0 7.2 Dresden Unit 3 3-2 December 1989

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' 4.1 Technical Soecification Reference q

a Technical-Specification 3.i.K - Local Transient LHGR 4.2l Descriotion.

The Local Transient-LHGR (TLHGR). limit versus= Average Planar Exposure for ANF 8x8 fuel is determined from Figure 4.2-l' J

The TLHGR limit versus Average Planar Exposure for ANF 9x9 fuel is determined-from Figure 4.2-2.

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Transient Linear Heat Generation Rate (TLHGR) Limit vs. Planar Exposure for ANF 8x8 Fuel t

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  • i Figure 4.2-2 Transient Linear Heat Generation Rate (TLHGR) Limit j

vs. Planar Exposure for ANF 9x9 Fuel i

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5.0 MINIMUM CRITICAL POWER RATIO OPERATING LIMIT f

5.1 Technical Soncification References Technical Specification 3.5.L - Minimum Critical Power Ratio (MCPR) 5.2 Descriotion a.

The MCPR Operating Limit at rated flow versus measured scram time i

is shown in Figure 5.2-1.

The MCPR Operating Limit is 1.34 or i

greater whenever the measured 90% insertion time is 2.65 seconds or less.

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During Manual Flow Control, the MCPR Operating Limit at reduced flow rates can be determined from:

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Figure 5.2-2 using the appropriate flow rate, or it. The rated flow MCPR Operating Limit determined via Figure 5.2-1, whichever is greater, i

During Automatic Flow Control, the MCPR Operating Limit at c.

I reduced flow rates can be determined from Figure 5.2-3 using the appropriate flow rate and rated flow MCPR Operating Limit, which is obtained.from Figure 5.2-1.

Linear interpolation between the curvas on Figure 5.2-3 is permissible.

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r Figure 5.2-1 MCPR Limit vs. Measured Scram Time to 90% Insertion Rated Flow Conditions j

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1.30C 2.70 2.2 2.90 3.2 3.10 3.8 3.5 3.40 3.50 Womwed Scre Tas to 90t Inertion (senends) -

The above graph demonstrates the following dependence of the MCPR Operating Limit versus measured scram time to 90% insertion for all resident fuel types:

MCPR LCO = 1.34 + (Tave - 2.65; *0.083 where Tave is the average insertion time to the 90% insertion point for all control rods in the core.

Dresden Unit 3 5-2 December 1989

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i Figure 5.2-2 MCPR Operating Limit for Manual Flow Control 13 i

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q, m enspunsaam The above curve is based on the following MCPR operating limit summary l

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Total Core Flott (X Rated)

MCPR Onoratina limit 100 1.10 90 1.15 80 1.21 70 1.28 60 1.36 50 1.46 40 1.57

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Figure 5.2-3 MCPR Operating Limit for Automatic Flow Control

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The above curve is based on the following MCPR operating limit sumary for Automatic Flow Control and all fuel types:

Total Core Flow MCPR Operating Limit *

(% Rated) 1.34 1.39 1.43 100 1.34 1.39 1,43 90 1.38 1.43 1.47 80 1.41 1,46 1.50 70 1.45 1,51 1.55 60 1.51 1.57 1.61 50 1.53 1.64 1.68 40 1.72 1.78 1.84

  • Column Headers are MCPR operating limits at rated flow.

Dresden Unit 3 5-4 December 1989 i

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