L-20-063, Submittal of Core Operating Limits Report, Cycle 21, Revision 3
| ML20062A180 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 02/26/2020 |
| From: | Bezilla M FirstEnergy Nuclear Operating Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| L-20-063 | |
| Download: ML20062A180 (30) | |
Text
FENOC Mark B.. Bezilla Vice President - Nuclear February 26, 2020 L-20-063 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
SUBJECT:
Davis-Besse Nuclear Power Station, Unit No.1 Docket No. 50-346, License No. NPF-3 Core Operating Limits Report, Cycle 21, Revision 3 5501 North State Route 2 Oak Harbor, Ohio 43449 419-321-7676 Fax: 419-321-7582 Enclosed is Revision 3 to the Davis-Besse Nuclear Power Station, Unit No. 1 (DBNPS)
Cycle 21 Core Operating Limits Report (COLR). A Cycle 21 license length extension evaluation concluded that Cycle 21 can be operated up to a licensed cycle length of 692 effective full power days (EFPD). The numerical value in section 1 of the COLR for the revised license length of 692 EFPD was updated from 690 EFPDs.
Submittal of this revision is in accordance with DBNPS Technical Specification 5.6.3, "CORE OPERATING LIMITS REPORT (COLR)."
There are no regulatory commitments contained in this letter. If there are any questions or if additional information is required, please contact Mr. Phil H. Lashley, Acting Manager, Nuclear Licensing and Regulatory Affairs, at (330) 315-6808.
s~
la'rk B. Bezill
Enclosure:
Cycle 21, Core Operating Limits Report, Revision 3 cc:
NRC Region Ill Administrator NRC Resident Inspector NRR Project Manager Utility Radiological Safety Board
Enclosure L-20-063 Cycle 21, Core Operating Limits Report, Revision 3 (28 pages follow)
Davis-Besse Cyc!e 21 COLR Page 1 of28 Revision 3 FIRSTENERGY NUCLEAR OPERATING C_OMPANY DAVIS-BESSE UNIT 1 CYCLE 21 CORE OPERATING LIMITS REPORt Prepared by J)..,,..1a. ~
2115/20
. D. B. Kelley-Reviewed by~ ~17(-
- Gl&1S.S Approved by ~~/Jg~
_,
- rown
Davis-Besse Cycle 21 COLR Page 2 of 28 Revision 3 1.0 Core Operating Limits This CORE OPERATING LIMITS REPORT for DB-1 Cycle 21 has been prepared in accordance with the requirements of Technical Specification 5.6.3. The Core Operating Limits have been developed using the methodology provided in Reference 2.0 (1). The licensed length of Cycle 21 is 692 EFPDs.
The following cycle-specific core Operating Limits, Protective Limit and Flux -il Flux -Flow Reactor Protection System Allowable Values are included in this report:
- 1.
SL 2.1.1.1
- 2.
- 3.
- 4.
- 5.
- 6.
- 7.
- 8.
- 9.
- 10. LCO 3.2.4
- 11. LCO 3.2.5
- 12. LCO 3.3.1 Reactor Core Safety Limits SHUTDOWN MARGIN (SDM)
Moderator Temperature Coefficient (MTC)
Position Indicator Channels PHYSICS TESTS Exceptions - MODE 1 PHYSICS TESTS Exceptions - MODE 2 Reguiating Rod Insertion Limits AXIAL POWER SHAPING ROD (APSR) Insertion Limits AXIAL POWER IMBALANCE Operating Limits QUADRANT POWER TILT (QPT)
Power Peaking Factors Reactor Protection Systems (RPS) Instrumentation Function 8: (Flux - ~Flux - Flow) Allowable Values
- 14. TRM 8.1.3 Rod Program 2.0 References
- 1) BAW-10179P-A, Rev. 9, "Safety Criteria and Methodology for Acceptable Cycle Reload Analyses", November 2017.
Table of Contents Reactor Core Safety Limits Figure 1 AXIAL POWER IMBALANCE Protective Limits Davis-Besse Cycle 21 COLR Page 3 of 28 Revision 3 Pae Davis-Besse 1, Cycle 21 5
SHUTDOWN MARGIN (SOM)
Table 1 Shutdown Margin Requirements for Davis-Besse, Cycle 21 6
Moderator Temperature Coefficient (MTC)
Table 2 Moderator Temperature Coefficient Limit for Davis-Besse, Cycle 21
- 7 Position Indicator Channels Table 3 Absolute Position Indicator (API) / Relative Position Indicator (RPI)
Agreement Limit for Davis-Besse, Cycle 21 8
Regulating Rod Insertion Limits Figure 2a Regulating Group Position Operating Limits 0 to 300 +/- 10 EFPD, Four RC Pumps Davis-Besse 1, Cycle 21 9
Figure 2b Regulating Group Position Operating Limits After 300 +/- 10 EFPD, Four RC Pumps Davis-Besse 1, Cycle 21 10 Figure 2c Regulating Group Position Operating Limits 0 to 300 +/- 1 O EFPD, Three RC Pumps Davis-Besse 1, Cycle 21 11 Figure 2d Regulating Group Position Operating Limits After 300 +/- 10 EFPD, Three RC Pumps Davis-Besse 1, Cycle 21 12 AXIAL POWER SHAPING ROD {APSR) Insertion Limits Figure 3 APSR Position Operating Limits for Davis-Besse, Cycle 21 13 AXIAL POWER IMBALANCE Operating Limits Figure 4a AXIAL POWER IMBALANCE Operating Limits 0 to 200 +/- 10 EFPD, Four RC Pumps Davis-Besse 1, Cycle 21
- 14.
Figure 4b AXIAL POWER IMBALANCE Operating Limits 200 +/- 10 EFPD to 450 +/- 10 EFPD, Four RC Pumps Davis-Besse 1, Cycle 21 15 Figure 4c AXIAL POWER IMBALANCE Operating Limits 450 +/- 10 EFPD to EOC, Four RC Pumps Davis-Besse 1, Cycle 21 16 Figure 4d AXIAL POWER IMBALANCE Operating Limits 0 to 200 +/- 10 EFPD, Three RC Pumps Davis-Besse 1, Cycle 21 17
Table of Contents Figure 4e AXIAL POWER IMBALANCE Operating Limits 200 +/- 10 EFPD to 450 +/- 10 EFPD, Three RC Pumps Davis-Besse 1, Cycle 21 Figure 4f AXIAL POWER IMBALANCE Operating Limits 450 +/- 1 O EFPD to EOC, Three RC Pumps Davis-Besse 1, Cycle 21 QUADRANT POWER TILT (QPT)
Davis-Besse Cycle 21 COLR Page 4 of 28 Revision 3 Pae 18 19 Table 4 QUADRANT POWER TILT Limits for Davis-Besse, Cycle 21 20 Power Peaking Factors Tabl43 5 Power Peaking Factors - Fa for Davis-Besse, Cycle 21 21 Table 6 Power Peaking Factors - FNAH for Davis-Besse, Cycle 21 23 Figure 5 Maximum Allowable Radial Peak for FNAH for Davis-Besse, Cycle 21 23 Table 7 Maximum Allowable Radial Peak for FNAHfor Davis-Besse, Cycle 21 24 Reactor Protection System (RPS) Instrumentation Figure 6a Flux-aFlux-Flow (or Power/Imbalance/Flow) Allowable Values Davis-Besse 1, Cycle 21 Before EC 19-0137 25 Figure 6b Flux-aFlux-Flow (or Power/Imbalance/Flow) Allowable Values Davis-Besse 1, Cycle 21 After EC 19-0137 26 Boron Concentration Table 8 Refueling Boron Concentration Limit for Davis-Besse, Cycle 21 27 Rod Program Figure 7 Control Rod Core Locations and Group Assignments for Davis-Besse, Cycle 21 28
Davis-Besse Cycle 21 COLR Page 5 of 28 Revision 3 Figure 1 AXIAL POWER IMBALANCE Protecti\\e Limits Da\\ns-Besse 1, Cycle 21 This Figure is referred to by Technical Specification 2.1. 1.1
(-44.93, 110.2)
(-49.04, 99.5)
(-49.04, 79.3)
UNACCEPTABLE OPERATION
(-44.93, 90.0) f
~
_J
~
ffi i!:
§
~ -
0
'E Cl) 0...
~
Cl) ;:
120 (32.32, 110.2) 1101........................
4 PUMP LIMIT 100 0
3 PUMP LIMIT 80 70 60 50 40 ACCEPTABLE OPERATION FOR SPECIFIED 30 RC PUMP 20 COMBINATION 10 (41.89, 87.4)
(41.89, 67.2)
UNACCEPTABLE OPERATION
-80
-70
-60
-50
-40
-30
-20
-10 0
10 20 30 40 50 60 70 80 AXIAL POWER IMBALANCE, %
Required Measured Pumps Reactor Coolant Flow to Ensure Ooeratina Flow, aom Comoliance, aom 4
380,000 389,500 3
283,860 290,957 4Pum Power Negatiw Positiw Lewi Imbalance Imbalance 110.2
-44.93 32.32 99.5
-49.04 87.4
-49.04 41.89 3 Pumo Power Negatiw Positiw Lewi Imbalance Imbalance 90.0
-44.93 32.32 79.3
-49.04 67.2
-49.04 41.89 0.0
-49.04 41.89 0.0
-49.04 41.89
Davis-Besse Cycle 21 COLR Page 6 of 28 Revision 3 Table 1 Shutdown Margin Requirements for Davis-Besse, Cycle 21 Verify SHUTDOWN MARGIN per the table below.
REQUIRED SHUTDOWN TECHNICAL SPECIFICATIONS APPLICABILITY MARGIN REFERENCE MODE 1 *
~ 1 %~k/k ***
3.1.4, 3.1.5
i MODE 2 *
~ 1 %~k/k 3.1.4, 3.1.5, 3.3.9
i
~M_.;_O_D_E_3 ________ --+-----~-1_0_Yo_~_k/_k ____
1--____
3._1_.1_,_, _3_.3._9 ___
---i MODE 4
~ 1 %~k/k 3.1.1, 3.3.9 ------<
MODE 5
~ 1 %~k/k 3.1.1, 3.3.9 ------<
MODE 1 PHYSICS TESTS E
- t.
~ 1 %~k/k 3.1.8 xceo1ons MODE 2 PHYSICS TESTS Exceptions
~ 1 %~k/k 3.1.9
- The required Shutdown Margin capability of 1 %~k/k in MODE 1 and MODE 2 is preserved by the Regulating Rod Insertion Limits specified in Figures 2a through 2d as required by Technical Specification 3.2.1.
- Entry into Mode 1 Physics Tests Exceptions is not supported by existing analyses. For example, Regulating Rod Shutdown Margin Insertion Limits assumptions may not be met and as such requires actual shutdown margin to be ~ 1 %~k/k via alternate verification or calculation.
Davis-Besse Cycle 21 COLR Page 7 of 28 Revision 3 Table 2 Moderator Temperature Coefficient Limit for Davis-Besse, Cycle 21 These limits are referred to by Technical Specifications 3.1.3
- 1.
Lower Limit:
MTC at HFP ~ -3.775x10-4 ak/k/°F (-37.75 pcml°F)
- 2.
The following Upper Limits may not be exceeded without prior NRC approval:
MTC <0.9 x 104 ak/k/°F when Thermal Power <95% RTP MTC <0.0 x 104 ak/k/°F when Thermal Power ~95% RTP
- 3.
The following Upper Limits may not be exceeded for operation in Modes 1 and 2:
r*
I I
I I
9.0E-05 * ---, --* ---* -----------r-*-******-**----------;-------**-------------*; *----------* ---------* :----* --- *- * -----------
8.0E-05
--. -. --. --. f*----------.---. --- ---!-.-. -- ------------ -----r---* --------.. ---- * -* i--. -- ----. ------*-.. -.
7.0Es05 f
6.oE~os * ------------------ ----:'* --- * -------------, :----------- ------- -- :------------------- --: ---- -*------- *-----: --
i 5.0E 005 * *-----------*** -- *-r--*-*- **--*** * --::***------*-***--**-* -*;*--- ------ -*** *-----i--- ---------------* --
4.0E-05 i
i i
i 3.0E-05 * ----------------.-------:-----------------------~---------**-*** *,-----:-----------------------:-----------------------
'I I
- ::*::. :::::::::::::: ::::::1:::: ::: ::: ::: :::;::: :::::::::::: ::: J.. :::::: : :::::::::[:::. ::::::::::: :
L O.OE+OO +--------+-----+-------+-------'------
0 20 AO 60 80 100 Perp~nt Full Power
Davis-Besse Cycle 21 COLR Page 8 of 28 Revision 3 Table 3 Absolute Position Indicator (API) / Relative Position Indicator (RPI)
- Agreement Limit for Davis-Besse, Cycle 21 This limit is referred to by Technical Specifications 3.1. 7 The absolute position indicator channels and the relative position indicator channels agree within 3.00%.
110 100 90 1? 80 w s 0 70
- a.
....I
<(
2 60 0::: w F 0 50 I!:!
~ 40 0 -
C:
Q)
~ 30 Q) e:.
~
0 20
- a.
10 0
Figure 2a Davis-Besse Cycle 21 COLR Page 9 of 28 Revision 3 Regulating Group Position Operating Limits 0 to 300 +/-10 EFPD, Four RC Pumps Da\\ns-Besse 1, Cycle 21 This Figure is referred to by Technical Specifications 3.2.1 I/
Unacceptable I
I/
Operation I/
I/
Operation I/
Restricted
- Shutdown Margin Limit I/
I/
I/
Acceptable Operation II 0
25 50 75 100 125 150 175 200 225 250 275 300 Rod Index, %Withdrawn
~
7r.
190 Group5
~
3s 7[
190 Group6 9
215 1qo Group7 Note 1: A Rod Group overlap of 25 +/- 5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.
Note 2: lnstrurrent error is accounted for in these Operating Lirrits.
Note 3: Maximum plotted power level is 100.37%RTP.
SDM Limit RI Limit Power RI Power RI 100.37 185.70 100.37 300.00 58.00 118.50 100.37 277.40 33.00 48.50 90.00 266.50 6.30 0.00 78.00 251.50 58.00 246.50 33.00 48.50 6.30 0.00
110 100 90 fi' 80 w s 0 70 a..
....I
<(
~ 60 0::: w
~
0 50
~
~ 40 0
"E Q)
!::! 30 Q)
~
~
0 20 a..
10 0
0 25
~
Groups Davis-Besse Cycle 21 COLR Page 10 of 28 Revision 3 Figure 2b Regulating Group Position Operating Limits After 300 +/-10 EFPD, Four RC Pumps Da\\lis-Besse 1, Cycle 21 This Figure is referred to by Technical Specifications 3.2.1 Unacceptable I/
Operation Operation Restricted f
I/
J Shutdown V
Margin Limit
/
I I
Acceptable Operation 50 75 100 125 150 175 200 225 250 Rod Index, %Withdrawn 1e 190 q
3s 7[
190 Group6
~
3s Group7 I
275 300 1qo Note 1: A Rod Group overlap of 25 +/- 5% between sequential withdrawn groups 5 and 6, and 6 and 7, shall be maintained.
Note 2: Instrument error is accounted for in these Operating Lirrits.
Note 3: Maxirrum plotted pow er level is 100.37 %RTP.
SDM Limit RI Limit Power RI Power RI 100.37 260.80 100.37 300.00 58.00 191.50 100.37 277.40 33.00 165.50 90.00 266.50 25.50 165.50 78.00 251.50 3.00 0.00 58.00 246.50 33.00 165.50 25.50 165.50 3.00 0.00
110 100 90
~ 80 w s 0 70
- 0.
....I
<(
~ 60 0:::
w i!:
0 50
~
~ 40 0....
C Q)
~ 30 Q) e:.
~ 20 0
- 0.
10 0
Davis-Besse Cycle 21 COLR Page 11 of 28 Revision 3 Figure 2c Regulating Group Position Operating Limits 0 to 300 +/-10 EFPD, Three RC Pumps Da\\As-Besse 1, Cycle 21 This Figure is referred to by Technical Specifications 3.2.1 Unacceptable Operation
~
I I
I If I
- Shutdown Operation Margin Restricted Limit
/
/
I/
/
Acceptable f
Operation 0
25 50 75 100 125 150 175 200 225 250 275 300 Rod Index, %Withdrawn
~
7r.
190 Groups
~
3s 7r 1qo Group6 q
215 1qo Group?
Note 1: A Rod Group overlap of 25 +/- 5% betweensequentialwithdrawn groups 5 and 6, and 6 and 7, shall be rraintained.
Note 2: Instrument error is accounted for in these Operating Lirrits.
Note 3: MaxilTllm plotted pow er level is 75:37 %RTP.
SOM Limit RI Limit Power RI Power RI 75.37 147.30 75.37 300.00 43.10 102.50 75.37 278.10 24.20 32.50 67.00 266.50 4.00 0.00 58.00 251.50 43.00 246.50 24.20 32.50 4.00 0.00
110 100 90
~ 80 w s 0 70
- a.
....I
<(
~ 60 0::
w
~
0 50
~
~ 40 0 -
C:
Q)
~ 30 Q) e:.
~
0 20
- a.
10 0
0 25
£ Group5 Davis-Besse Cycle 21 COLR Page 12 of 28 Revision 3 Figure 2d Regulating Group Position Operating Limits After 300 +/-.10 EFPD, Three RC Pumps Davis-Besse 1, Cycle 21 This Figure is referred to by Technical Specifications 3.2.1 Unacceptable Operation I
Operation Restricted I
Shutdown I
Margin Limit I,
Acceptable Operation 50 75 100 125 150 175 200 225 250 Rod Index, % Withdrawn 7e 1qo
~
2e 7[
190 Group6
~
3s I/
275 300 10,0 Group 7 Note 1: A Rod Group overlap of 25 +/- 5% between sequentialwithdrawngroups 5 and 6, and 6 and 7, shall be maintained.
Note 2: Instrument error is accounted for in these Operating Lirrits.
Note 3: Maximum plotted pow er level is 75.37 %RTP.
SDM Limit RI Limit Power RI Power RI 75.37 218.50 75.37 300.00 43.10 185.50 75.37 278.10 24.20 104.50 67.00 266.50 17.70 104.50 58.00 251.50 1.90 0.00 43.00 246.50 24.20 104.50 17.70 104.50 1.90 0.00
Davis-Besse Cycle 21 COLR Page 13 of 28 Revision 3 Figure 3 APSR Position Operating Limits for Davis-Besse, Cycle 21 This Figure is referred to by Technical Specifications 3.2.2 Before APSR Pull: 0 EFPD to 630 +/- 10 EFPD, Three or Four RC pumps operation*
Lower Limit: 0 %WO Upper Limit: 100 %WO After APSR Pull: 630 +/- 10 EFPD to End-of-Cycle Three or Four RC pumps operation*
Insertion Prohibited (maintain ~ 99%WD) **
Power restricted to 75.37% for 3-pump operation, however, steam generator analyses limits power to 73.46 %RTP.
- Reinsertion is allowed only during the end of cycle shutdown when the reactor power is equal to, or less than, 30%RTP.
Figure 4a AXIAL POWER IMBALANCE Operating Limits 0 to 200 +/- 10 EFPD, Four RC Pumps Da\\1s-Besse 1, Cycle 21 Davis-Besse Cycle 21 COLR Page 14 of 28 Revision 3 This Figure is referred to by Technical Specification 3.2.3 110 I I 11 I I 100
'II I I Restricted I I Region I I
~
J 90 I
I I
~
I I I I r
80 11 I I j
70 I I I I I I
- o 12' I I w
I I s:
I I 0
>-50 0..
...I I I
<(
I I
- a; I I
~ >-40....
Pennissible w
j!:
I I Operating I I Cl 1 1 Region
~
-30 I I I I 0
I I
- >-20 C
Cl)
I I
~
Cl)
I I e:.
I I
... >-10
~
I I
0..
I I I 0
-60
-50
-40
-30
-20
-1 0 0
10 20 AXIAL POWER IMBALANCE %
Note 1: Instrument error is accounted for in these Operating Limits.
Restricted Region l
30 40 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full lncore system is non-functional.
Note 3: Maximum plotted power level is 100.37 %RTP.
Full lncore Excore Negath.e Positil.e Negatil.e Positil.e Power Imbalance Imbalance Power Imbalance Imbalance 100.37
-23.17 15.98 100.37
-15.42 8.69 92.00
-30.11 23.90 92.00
-22.16 16.34 80.00
-37.00 30.06 60.00
-28.94 23.96 60.00
-37.00 31.00 60.00
-35.46 31.00 0.00
-37.00 31.00 0.00
-35.46 31.00 50 60 LEGEND
~NOORE EXCORE 0
Davis-Besse Cycle 21 COLR Page 15 of 28 Revision 3 Figure 4b AXIAL POWER IMBALANCE Operating Limits 200 +/- 10 EFPDto 450 +/- 10 EFPD, Four RC Pumps Da1.1s-Besse 1, Cycle 21 This Figure is referred to by Technical Specification 3.2.3 110 11 I I 11 100 11 Restricted I I Restricted Region 11
~
90 I I I I l
I I 80
)
.I I I I
I I j
J I I 70 J
I I I I I I co i:2" I I w
I I
~
I I 0 -so
- a.
I I
<(
I I
~
I I 0:::, Pennissible w
~
I I Operating I I 0
I I Region
~..... 30
~
I I I I I I 0 - >-20 C:
Cl)
I I e
Cl)
I I e::.
I I
... -10
~
I I
- a.
I I
0
-60
-50
-40
-30
-20
-10 0
10 20 AXIAL POWER IMBALANCE %
Note 1: Instrument error is accounted for in these Operating Limits.
Region l,
30 40 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full In core system is non-functional.
Note 3: Maxim um plotted power level is 100.37 %RTP.
Full lncore Excore Negath.e Posith.e Negath.e Posith.e Power Imbalance Imbalance Power Imbalance Imbalance 100.37
-16.42 15.27 100.37
-9. 10 8.01 92.00
-22.21 21.08 92.00
-14.75 13.69 80.00
-29.99 29.27 80.00
-22.36 21.69 60.00
-37.00 31.00 60.00
-29.81 30.26 0.00
-37.00 31.00 0.00
-29.81 30.26 50 60 LEGEND FiJITTl'CORE EXOORE 0
Figure 4c AXIAL POWER IMBALANCE Operating Limits 450 +/- 10 EFPDto EOC, Four RC Pumps Da"1s-Besse 1, Cycle 21 Davis-Besse Cycle 21 COLR Page 16 of 28 Revision 3 This Figure is referred to by Technical Specification 3.2.3 110 11 11 I I 100 I I Restricted J
I I Region 11
~
~
90 J
I I I I I I j
1 80 I I I I j
I I 70 I
I I I I I I I
~o 1?
I I w
I I
~
I I 0 -so 0..
I I
,c{
I I
- l:
0::: -40,..
Pennissible w
~
I I Operating I I Region 0
I I
~ -30
~ I I I I
'o I I
-..... 20 C
G)
I I
~
G)
I I 0..
I I
-... -10
~
I I
0..
I I I 0
-60
-50
-40
-30
-20
-10 0
10 20 AXIAL POWER IMBALANCE %
Note 1: Instrument error is accounted for in these Operating Limits.
Restricted Region I
l l
30 40 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full lncore system is non-functional.
Note 3: Maximum plotted powerlewl is 100.37 %RTP.
Full lncore Excore Negatiw Positiw Negatiw Positiw Power Imbalance Imbalance Power Imbalance Imbalance 100.37
-15.18 12.57 100.37
-7.93 5.49 92.00
-20.88 18.17 92.00
-13.50 10.96 80.00
-28.20 25.71 80.00
-20.68 18.35 60.00
-35.88 31.00 60.00
-28.35 25.80 0.00
-35.88 31.00 0.00
-28.35 25.80 50 60 LEGEND
~INCORE EXCORE 0
Figure 4d AXIAL POWER IMBALANCE Operating Limits 0 to 200 +/- 10 EFPD, Three RC Pumps Da\\1s-Besse 1, Cycle 21 Davis-Besse Cycle 21 COLR Page 17 of 28 Revision 3 This Figure is referred to by Technical Specification 3.2.3 110 1 1 I I 1 1 100 1 1 I I 1 1 90 I I 1 1 I I 80 I I
~
11
,_ Restricted
~
~
70
~
- !II Region 11 I\\.
11 11
- o j
Ii' 11 w
11
~
I 0 -50 a..
....J I
<(
I
- i!:
I 0:: -40 _,_
Pennissible w
~
I Operating I
Cl I
Region
~ -30
~
I I
0 I
- -20 C:
Q) 1 1
~
Q) 11 a..
I I
......... -10 I
I 0
I a..
I I
0
-60
-50
-40
-30
-20
-10 0
10 20 AXIAL POWER IMBALANCE %
Note 1: Instrument error is accounted for in these Operating Limits.
Restricted Region 30 40 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full lncore system is non-functional.
Note 3: Maximum plotted power level is 75.37 %RTP.
Full lncore Excore Negath.e Poslth.e Negatil.e Positil.e Power Imbalance Imbalance Power Imbalance Imbalance 75.37
-23.45 16.27 75.37
-16.29 9.56 69.00
-30.38 22.45 69.00
-22.93 17.11 60.00
-37.00 26.65 60.00
-29.55 24.57 45.00
-37.00 31.00 45.00
-35.80 31.00 0.00
-37.00 31.00 0.00
-35.80 31.00 50 EXCORE 0
60
Davis-Besse Cycle 21 COLR Page 18 of 28 Revision 3 Figure 4e AXIAL POWER IMBALANCE Operating Limits 200 +/- 10 EFPDto 450 +/- 10 EFPD, Three RC Pumps Da\\As-Besse 1, Cycle 21 This Figure is referred to by Technical Specification 3.2.3 110 I
I I
100 I
I I
90 11 I I 11 80 I I I I "I
Restricted
~
70 l"I Restricted
- ~
~
Region 11 Region 11 I~
I I r
- o j
fr 11 I
w I I s:
I I
0 a.. -50 I
...J I
I~
<(
I
~
I 0:: Permissible w
j; I
Operating I
0 I
Region
~ -30
~
I I
I 0 - -20 C
G)
I
~
G)
I
~
I
... -10
~
I I
a..
I I
0
-60
-50
-40
-30
-20
-10 0
10 20 AXIAL POWER IMBALANCE %
Note 1: Instrument error is accounted for in these Operating Limits.
I 11 30 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full lncore system is non-functional.
Note 3: Maximum plotted power level is 75.37 %RTP.
Full lncore Excore Negatil.e Positil.e Negatiw Positiw Power Imbalance Imbalance Power Imbalance Imbalance 75.37
-16. 71 15.55 75.37
-9.97 8.89 69.00
-22.48 21.34 69.00
-15.53 14.46 60.00
-30.22 26.65 60.00
-22.97 22.30 45.00
-37.00 31.00 45.00
-30.13 30.57 0.00
-37.00 31.00 0.00
-30.13 30.57 40 50 60 LEGEND FU.L 11\\CORE EXCORE 0
Figure 4f AXIAL POWER IMBALANCE Operating Limits 450 +/- 10 EFPD to EOC, Three RC Pumps Da'As-Besse 1, Cycle 21 Davis-Besse Cycle 21 COLR Page 19 of 28 Revision 3 This Figure is referred to by Technical Specification 3.2.3 110 I
I I
100 I
I I
90 I
I I
80 I
I~
I I
~
Restricted 70 Region
~
I I I I I I
- o I
f?
I I I
w I I 1
j
~
I I 0 >-50 a..
....I I I ct:
I I
- E I I 0::: f-40 --
Permissible w
j!:
I I Operating I I 0
I I Region
~..... 30
~
I I I I 0
I I
- >-20 C
Cl)
I I
~
I I Cl) e:.
I I
... -10
~
I 0
I a..
I I
0
-60
-50
-40
-30
-20
-10 0
10 20 AXIAL POWER IMBALANCE %
Note 1 : Instrument error is accounted for in these Operating Limits.
Restricted Region I
I 1
(
30 40 Note 2: The Excore Imbalance Operating Lim its are available for use when the Full lncore system is non-functional.
Note 3: Maximum plotted power level is 75.37 %RTP.
Full lncore Excore Negathe Positiw Negatiw Positiw Power Imbalance Imbalance Power Imbalance Imbalance 75.37
-15.47 12.86 75.37
-8.80 6.36 69.00
-21.14 18.44 69.00
-14.27 11.74 60.00
-28.42 25.94 60.00
-21.29 18.97 45.00
-36.05 31.00 45.00
-28.66 26.12 0.00
-36.05 31.00 0.00
-28.66 26.12 50 60 LEG8'0 FULL INCORE EXCORE 0
~~- -----------------------
~
Davis-Besse Cycle 21 COLR Page 20 of 28 Revision 3 Table 4 QUADRANT POWER TILT Limits for Davis-Besse, Cycle 21 This Table is referred to by Technical Specifications 3.2.4 From O EFPD to EOC Steady-state Limit Steady-state Limit QUADRANT for THERMAL for THERMAL POWER TILT as POWER::.60%
POWER >60%
Transient Limit Maximum Limit measured by:
(%)
(%)
(%)
(%)
Symmetric lncore 7.90 6.23 10.03 20.00 Detector System Minimum lncore Detector System 3.84 2.65 4.40 20.00 with no dropped rod*
Minimum lncore Detector System 3.35 2.32 4.40 20.00 with a dropped rod*
- These operating limits are based on the condition that no individual long emitter detector affecting the Minimum lncore Detector System tilt calculation exceeds 73% sensitivity depletion, which is the case for Cycle 21.
Davis-Besse Cycle 21 COLR Page 21 of 28 Revision 3 Table 5 Power Peaking Factors - Fa for Davis-Besse, Cycle 21 This Table is referred to by Technical Specifications 3.2.5 Heat Flux Hot Channel Factor Fa Fo shall be limited by the following relationships:
Fo :,; LHRanow (Bu) / [LHRavg
- P] (for P :,; 1.0)
LHRanow (Bu) = See the following tables LHRavg
= 6.4265 kW/ft at 2817 MWt for all fuel P
= ratio of THERMAL POWER/ RATED THERMAL POWER (current fraction of power)
Bu
= fuel burnup (MWd/mtU)
Note: The measured Fo shall be increased by 1.4% to account for manufacturing tolerances and further increased by 7.5% to account for measurement uncertainty before comparing to the limits. The core monitoring system computer-generated FQ values are augmented by the required uncertainties.
U02 Fuel (Mark-B-HTP) -All Batches except Batch 23A LHRALLow kW/ft<a>
0 34,000 62,000 Core Elevation (ft)
MWd/mtU MWd/mtU MWd/mtU 0
17.35 14.95 10.85 2.506 17.35 14.95 10.85 4.264 17.25 14.85 10.85 6.021 16.8 14.8 11.1 7.779 17.0 14.7 11.1 9.536 16.2 14.3 11.1 12.000 15.4 13.5 10.4
<a> Linear interpolation for allowable LHR between specified burnup points is valid for these tables.
Table 5 (continued)
Davis-Besse Cycle 21 COLR Page 22 of 28 Revision 3 U02 Fuel (Mark-B-HTP) - Batch 23A LHRALLow kW/ftCa>
0 34,000 Core Elevation (ft)
MWd/mtU MWd/mtU 0
16.95 14.95 2.506 16.95 14.95 4.264 16.85 14.85 6.021 16.4 14.8 7.779 16.6 14.7 9.536 15.8 14.3 12.000 15.0 13.5 4 wt% Gad Fuel (Mark-B-HTP) -All Batches LHRALLow kW/ftCa>
0 34,000 62,000 Core Elevation (ft)
MWd/mtU MWd/mtU MWd/mtU 0
15.55 13.45 9.55 2.506 15.55 13.45 9.55 4.264 15.45 13.25 9.55 6.021 15.1 13.2 9.8 7.779 15.3 13.2 9.8 9.536 14.6 12.8 9.8 12':000 13.8 12.1 9.2 8 wt% Gad Fuel (Mark-B-HTP) -All Batches LHRALLow kW/ftCa>
0 34,000 62,000 Core Elevation (ft)
MWd/mtU MWd/mtU MWd/mtU 0
14.65 12.65 8.75 2.506 14.65 12.65 8.75 4.264 14.55 12.65 8.75 6.021 14.2 12.5 9.0 7.779 14.4 12.5 9.0 9.536 13.7 12.2 9.0 12.000 13.0 11.5 8.4 Ca> Linear interpolation for allowable LHR between specified burn up points is valid for these tables.
Davis-Besse Cycle 21 COLR Page 23 of 28 Revision 3 Table 6 Power Peaking Factors - FNllH for Davis-Besse, Cycle 21 This Table is referred to by Technical Specifications 3.2.5 Enthalpy Rise Hot Channel Factors - FNAH FNL1H S MARP [1 + (1/RH) (1 - P/Pm)]
(see note below)
MARP
= Maximum Allowable Radial Peak, see MARP Figures and data Tables P
= THERMAL POWER/ RATED THERMAL POWER and P s 1.0 Pm
= 1.00 for 4-RCP operation Pm
= 0.75 for 3-RCP operation 1/RH
= 0.3 RH
= 3.33 Note: The measured FNL1H shall be increased by 5.0% to account for measurement uncertainty prior to comparing to the limits. The core monitoring system-generated FNt1H values are augmented by the required uncertainties.
Figure 5 Maximum Allowable Radial Peak for FNllH for Davis-Besse, Cycle 21
- 2.2 2.1 x/L=l.O x/L=0.88
--+-x/L=0.6
....,.x/L=0.4
...-x/L=0.14
-+-x/L=0.0
-+-x/L=0.9 x/L=0.8
-e-x/L=0.5
~
x/L=0.2 x/L=0.1 1.3 -J------':===+===~====ii:==.---l-- ---+----+-----lf--------1 1.10 1.20 1.30 1.40
- Linear interpolation is acceptable.
1.50 Axial Peak 1.60 1.70 1.80 1.90
Davis-Besse Cycle 21 COLR Page 24 of 28 Revision 3 Table 7 Maximum Allowable Radial Peak for FNaH for Davis-Besse, Cycle 21 Axial Axial Axial Height Axial Height Peak x/L (inches)
MARP Limit Peak x/L (inches)
MARP Limit 0.0 0.00 1.88299 0.0 0.00 2.09189 0.1 14.30 1.88398 0.1 14.30 2.03919 0.14 20.02 1.88428 0.14 20.02 2.01827 0.2 28.60 1.88461 0.2 28.60 1.98801 0.4 57.20 1.88490 0.4 57.20 1.86840 1.1 0.5 71.50 1.88439 1.6 0.5 71.50 1.81257 0.6 85.80 1.88451 0.6 85.80 1.73794 0.8 114.40 1.88421 0.8 114.40 1.59754 0.88 125.84 1.85239 0.88 125.84 1.54331 0.9 128.70 1.83969 0.9 128.70 1.55084 1.0 143.00 1.73842 1.0 143.00 1.46874 0.0 0.00 1.96511 0.0 0.00 1.99604 0.1 14.30 1.96705 0.1 14.30 1.95702 0.14 20.02 1.96804 0.14 20.02 1.93661 0.2 28.60 1.96825 0.2 28.60 1.90615 0.4 57.20 1.96936 0.4 57.20 1.79933 1.2 0.5 71.50 1.96984 1.7 0.5 71.50 1.74468 0.6 85.80 1.96919 0.6 85.80 1.67736 0.8 114.40 1.84278 0.8 114.40 1.54415 0.88 125.84 1.78287 0.88 125.84 1.49299 0.9 128.70 1.78220 0.9 128.70 1.50138 1.0 143.00 1.67994 1.0 143.00 1.42245 0.0 0.00 2.05580 0.0 0.00 1.90606 0.1 14.30 2.05912 0.1 14.30 1.87049 0.14 20.02 2.06036 0.14 20.02 1.85710 0.2 28.60 2.06155 0.2 28.60 1.82954 0.4 57.20 2.06343 0.4 57.20 1.73365 1.3 0.5 71.50 2.01583 1.8 0.5 71.50 1.67902 0.6 85.80 1.93900 0.6 85.80 1.62023 0.8 114.40 1.77864 0.8 114.40 1.49550 0.88 125.84 1.71670 0.88 125.84 1.44607 0.9 128.70 1.72105 0.9 128.70 1.45590 1.0 143.00 1.61890 1.0 143.00 1.37861 0.0 0.00 2.15314 0.0 0.00 1.82131 0.1 14.30 2.15758 0.1 14.30 1.78903 0.14 20.02 2.15910 0.14 20.02 1.78024 0.2 28.60 2.14648 0.2 28.60 1.75713 0.4 57.20 2.01712 0.4 57.20 1.67040 1.4 0.5 71.50 1.95015 1.9 0.5 71.50 1.61847 0.6 85.80 1.87083 0.6 85.80 1.56653 0.8 114.40 1.71630 0.8 114.40 1.44958 0.88 125.84 1.65545 0.88 125.84 1.40281 0.9 128.70 1.65903 0.9 128.70 1.41322 1.0 143.00 1.57207 1.0 143.00 1.33783 0.0 0.00 2.17667 0.1 14.30 2.12413 0.14 20.02 2.10403 0.2 28.60 2.07451 0.4 57.20 1.94104 1.5 0.5 71.50 1.88067 0.6 85.80 1.80330 0.8 114.40 1.65555 0.88 125.84 1.59706 0.9 128.70 1.60415 1.0 143.00 1.51859
Davis-Besse Cycle 21 COLR Page 25 of 28 Revision 3 Figure 6a Flux-L\\Flux-Flow
( or Power/Im balance/Flow)
Allowable Values Davis-Besse 1, Cycle21 Before EC 19-0137 This Figure is referred to by Technical Specification 3.3.1 I I I I
-i I
I II II II II I
I I I I I I I I I
4 PU MP LIMIT -"-'-1-1-1-1-1-1-1-1~1-1-1-1-1-1-"-H t-+-+-+-++-+-+-+-t-+-+ (-1 7. 0, 1 08. 0 ll-l,i,~
-"-'-1-1-i:1-1:"""--1-1-+-+-...a..+-+-~
4- ( 1 7. 0, 1 08.01"4-"-'-1-1"""--1-1-+-+--I--<
I I
l-l-l-+-l-+-1-.(-30. 6, 94.4 l~ +--1-+-+-i-+-i--+4~414-1-+-ll-+-~-l-+--l-+-++1' ~-+4~-+-<l-+-l-++-+++++-H I
I, B~
(
1-'
I 3 PUMP 130.6, 77.11 EXAMPLE +,+-1--"-'-+-<1+-1-1-1-+-+-+-++-+-+-+-t-+-1 I~
I I-'
I I
I L
t--+-+-+--+-+-++-+-+--+---ttt--+-+-+-+-+ I ~-
l-"'-+-+-+-+--+-+-"-'-+-t-+-t~
l-+-1-+-I-+-+-+-+-+- -I.+4:--H.....+-,1-+-1-+-1-+-+-+-+-+--+-+-ll,....... --H.....+-,1-+-1-+-+-+-+-+-++-1
~-5~lJH.....+-,1-+-1-+-1-+-+-+-+-+--+-+-+-1H--1-+-
~ UNACCEPTABLE:!:~!:!:!:!:!::!::!::!::!::!: ffi UNACCEPTABLE OPERATION j!:
OPERATION t--t-+-+-t--t--+-iH-+++-tr-++11-+-1r-++++-1-++ ©
-+4Ull-+-!+++-H+++-Hl-+-+++l-+++++--H-+++-HH-1 i-+-1-+-1-+-,H-iH-iH-i-+-t'*-f-+-+-+-+++++~
I 1-1-+-+-++-"-'-+-t-+-ti-+-1-H+-+-+-+-+-+-+-+-++-
I t-+-+-+-++-+-t-+-t-+-tl-+-1--H+-+-+-+-+-+-+-+-++ ~ -µ...
l-+-1-Hi-+-1,-++-++-+++-Hll-++-HH-1-++-+ t ~
t-+-++++-+-+-+-t-+-il-+-1--H+-+-+-+-+-+-+-+-++ i-~
ACCEPTABLE OPERATION FOR SPECIAE> RC --L+-+-.L.L..&.....i.-"-'-1-1-1-1"""-1-1 PUMP 1-1-+-+-++-"-'-+-t-+-tl-+-1-HI-+-+-+-+-+-+-+-++ ~- 2111-11-+-+-+-+-+-+-+-++++-+-+-+-l~l-+-l-"'-+-l-++++-+-+--H t-+-++++-+-+-+-t-+-il-+-1--H+-+-+-+-+-+-+-+-++&
I I
I
-60
-50
-40
-30
-20
-10 0
10 20 30 40 50 60 AXIAL FOVVffi M:IALANCE, %
The 3 pump example curve shows allowable values for an approximately25% flow reduction for three pump operation (283,860 gpm ). The actual setpointwill be calcu lated by the Reactor Protection System and will be directly proportional to the actual reactorcoolantsystem flow with three pumps.
These limits are based on Cycle 9 and are conservative relative to the actual Cycle 21 limits.
Figure 6b Flux-~Flux-Flow
( or Power/Im balance/Flow)
Allowable Values Davis-Besse 1, Cycle21 After EC 19-0137 Davis-Besse Cycle 21 COLR Page 26 of 28 Revision 3 This Figure is referred to by Technical Specification 3.3.1 12:
I I I I I I I I I I I I I I I I I I I I I I I I I I I I 11 I I I 110 4 PUMP LIMIT
(-17. 0, 108.0 I
(1 4.0, 108.0 I
I I I
I I 10 I I I I
(-30.6, 94.4)
I I
9'.:
I 1
I I
~
8 I~
I 3PUMP (27.6, 77.11 I~
I
~
I EXAMPLE
~
r
~
V I
I !
I 1
_J
- UNACCe>TABLE
- L 5" t
UNACCe>TABLE OPERATION OPERATION
~
0 --.....-
- ii - 30 ACCEPTABLE e-,....._
OPERATION (f-8:
FOR SPECIRB> RC
~-
PUMP lii 3:
2" I
I I
1" V
-60
-50
-40
-30
-20
-10 0
10 20 30 40 50 60 AXIAL POVVffi M3ALA!\\CE, %
The 3 pump example curve shows allowable values for an approximately25% flow reduction for three pump operation (283,860 gpm ). The actual setpointwill be calculated by the Reactor Protection System and will be directly proportional to the actual reactorcoolants ystem flow with three pumps.
These limits are based on EC 19-0137 and are conservative relative to the actual Cycle 21 limits.
Davis-Besse Cycle 21 COLR Page 27 of 28 Revision 3 Table 8 Refueling Boron Concentration Limit for Davis-Besse, Cycle 21 This limit is referred to by Technical Specifications 3.9.1 The minimum required boron concentration for Mode 6 shall be sufficient to ensure a Ke1r of 0.95 or less, plus an additional 1 % ~k/k conservatism allowance for uncertainties.
(W)
Davis-Besse Cycle 21 COLR Page 28 of 28 Revision 3 Figure 7 Control Rod Core Locations and Group Assignments for Davis-Besse, Cycle 21 This Figure is referred to by Technical Requirements Manual 8.1.3 N
1 2
3 4
5 6
7 2
4 8
5 6
7 5
4 8
2 7
@roup Number Group 1
2 3
4 No of Rods 4
8 4
9 2
5 5
2 I
4 8
6 3
6 8
4 Function Safety Safety Safety Safety Total (X) 7 8
9 10 11 12 13 14 15 I
5 1
1 5
I I
6 5
7 3
1 4
1 3
7 5
6 (Z)
Group 5
6 7
8 I
4 2
8 5
6 3
6 5
8 2
4 No of Rods 12 8
8 8
61 7
8 7
8 7
2 5
5 2
Function Control Control Control APSRs 4
6 4
A B
C D
E F
G H (Y)
K L
M N
0 p
R