Text

RE-21 Colr,Cycle 3, Rev 01-03-03
	ML20059D269
Person / Time
Site:	Seabrook
Issue date:	12/24/1993
From:	; NORTH ATLANTIC ENERGY SERVICE CORP. (NAESCO)
To:	;
Shared Package
ML20059D216	List: ML20059D213; ML20059D269;
References
	NYN-93173, NUDOCS 9401070095
	Download: ML20059D269 (9)
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C North Atlantic :

December 29,1993 - .j i

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ENCLOSURE TO NYN-93173 ;

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3 RE-21 CORE OPERATING LIMITS REPORT P

CYCLE 3 COLR L

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F RE DEPT SUPER VISOR [4Y! hM'* I2llb3 SIGNATURE ' W.

DATE OPERATIONS MANAGER 9]I ,y bic, yyjpy3 h j SIGNATURE DATb ;

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REVISION 01-03-03 i

RE-21

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1.O? CSRE LOPERATING fMTTS REPORT -

Rev. 0103 03 :

Page 1 of 7 This Core Operating Limits Report for Seabrook Station. Unit 1. Cycle 3 has been prepared in accordance with the requirements of Technical Specification 6.8.1.6. '

The Technical Specifications affected by this report are: ,

1) 3.1.1.1 Shutdown Margtn Limit for MODES 1. 2. 3. 4

2) 3.1.1.2 Shutdown MargLn Limit for MODE 5

3) 3.1.1.3 Moderator Temperature CoefHelent

4) 3.1.3.5 Shutdown Rod Insertion Limit

5) 3.1.3.6 Control Rod Insertion Limits .

6) 3.2.1 Axial Flux Difference

7) 3.2.2 Heat Flux Hot Channel Factor ,

8) 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor 2.0 OPERATING LIMITS The cycle-specific parameter limits for the specifications listed in section 1.0 are .

presented in the following subsections. These limits have been developed using the NRC-approved methodologies specified tr. 'rechnical Specification 6.8.1.6.

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2.1 Shutdown Margin Ilmit For MODES 1,2,3, and 4: (Specification 3.1.1.1) .

A) The Shutdown Margin shall be greater than or equal to 1.3 % AK/K in MODES 1, .

2, and 3. .

B) The Shutdown Margin shall be greater than or equal to'1.8 % AK/K in MODE 4.

2.2 Shutdown Margin Ilmit For MODE 5: (Specification 3.1.1.2) .

The Shutdown Margin shall be greater than or equal to 1.8 % AK/K.

m.<-m -- ,w . - .

RE-21 2.3 Mod: rat:r Temperature Coeff1':isct: (Specificati:n 3.1.1.3)

Rcv. 01-03-03 Page 2 of 7 2.3.1 The Moderator Temperature CoefIlcient (! SIC) shall be le'ss positive than 0 AK/K/*F for Beginning of Cycle Life (BOL). All Rods Out (ARO) Hot Zero Thermal Power conditions.

2.3.2 MTC shall be less negative than -4.2 x 10-* AK/K/'F for End of Cycle Life (EOL). ARO. Rated Thennal Power conditions.

2.3.3 The 300 ppm ARO. Rated Thermal Power M'IC shall be less negative than

-3.3 x 10-4 AK/K/'F (300 ppm Surveillance Limit) 2.4 Shutdown Rod Insertion Limit: (Specification 3.1.3.5) 2.4.1 The shutdown rods shall be fully withdrawn. The fully withdrawn position is defined as the intenal within 225 steps withdrawn to the mechanical fully withdrawn position inclusive.

2.5 Control Rod Insertion Ilmits: (Specification 3.1.3.6) 2.5.1 The control rod banks shall be limited in physical hisertion as specifled in Figure 1, 2.6 Axial Fluz Difference: (Specification 3.2.1) 2.6.1 The Axial Flux Difference (AFD) Target Band is + 3 %. - 12 %.

2.6.2 The indicated AFD may deviate outside the required band specified in 2.6.1 (above) at greater than or equal to 50 % but less than 90 % of RATED.

THERMAL POWER provided the indicated AFD is within the Acceptable-Operation Limits as specified in Figure 2.

2.7 Heat Fluz Hot Channel Factor: (Specification 3.2.2) -

2.7.1 F"o = 2.32

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2.7.2 K(Z) is specified in Figure 3. ":RE-21 -

Rov."01-03-03

'Page 3 of 7 s 2.7.3 PFu = 0.2 -

2.7.4 The Fw limits for Rated Thermal Power within specific core planes shall ber -

2.7.4.1 ,

Fu (RIP) less than or equal to 1.850 for all planes containing banks D + C control rods; 2.7.4.2 Fu (RTP) less than or equal to 1.800 for all planes containing bank D control rods;

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2.7.4.3 Fu (RTP) less than or equal to 1.640 for all unrodded planes for cycle burnup from 0 up to 1,000 MWD /MTU; :

2.7.4.4 Fu (RTP) less than or equal to 1.670 for all unrodded planes'for cycle-burnup from 1.000 up to 2,000 MWD /MTU: 6 2.7.4.5 Fu (RTP) less than or equal to 1.680 for all unrodded planes for cycle' ;

burnup from 2.000 up through 8.000 MWD /MIU; '

2.7.4.6 Fu (RTP) less' than or equal to 1.630 for all unrodded planes. for cycle _ j burnup from 8,000 up through 12,000 MWD /MTU; - I 2.7.4.7 Fu (RTP) fess than or equal to 1.620 for all unrodded planes for cycle burnup from 12.000 MWD /MTU onward; and 2.7.4.8 See Figure 4 for a plot of F g(Z) x P(REL) versus axial core height.

2,8 Nuclear Enthalpy Rise Hot Channel Facter. (Specification 3.2.3) -

t 2.8.1 F ",,' = 1.490 for the movable incore detector system F"' = 1.488 for the fixed incore detector system ,

2.8.2 PF3 = 0.2 1

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~ . RE-21 Rev 0103 03 -

Page;4 of 7 >

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CYCLE 3 COLR* FIGURE 1 ROD BANK INSERTION LIMITS VS. THERMAL POWER :

(Steps Withdrawn) (Fractional Power) . l 6

225 FULLY WITHDRAWN = 225 to 232 faciustre. 't

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(0.286,225)l '(0.830,125),/

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0. 0 0.2 0.4 0. 6 0.8 1:0 Fractional Rated Thermal Po'wer- .i i

Bank A must be FULLY WITHDRAWN prior to power operation. i

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.p g_3, Rev. 01-03-03 Page 5 of' 7 L

CYCLE 3 COLR FIGURE 2 120 100 Unacceptable operation Unacceptable operation

i i,ii g (-11,90) 7 g- (11,90) 1 80 E / \

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S Acceptable operation

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(g 40

(-31,50) (31,50)-

20 l l l l 40 20 -10 0 10 20 30 40 50 Flux Difference (AI)%

AXIAL FLUX DIFFERENCE LIMITS AS A FUNCTION OF-RATED THERMAL POWER

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- Rev. 01 03 03 Page 6 of 7

1. -

L- CYCLE 3 COLR FIGURE 3 1.2

- (0.0,1.0) . (6.0,1.0) 1.0 . (10.8,0.94) _

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0.0 0 2 4 6 8 10 -12 Core Height (ft)

K(Z) - NORMALIZED Fg(Z)

AS A FUNCTION OF CORE-HEIGHT

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- ..- RE-21 CYCLE 3 COLR FIGURE 4 ##"' ##~8##

Page 7 of 7

t. 2.4 . . . .

- (0.0,2.32) (6.0,2.32) ---

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0 2 4 6 8 10 -12 Bottom Top -

Axial Core Height (ft) 7 MAXIMUM Fo - Ps VERSUS CORE HEIGHT

ML20059D269

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