ML19116A268

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Core Operating Limits Report, Revision 26
ML19116A268
Person / Time
Site: Palo Verde Arizona Public Service icon.png
Issue date: 04/26/2019
From: Dilorenzo M
Arizona Public Service Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
102-07906-MDD/MSC
Download: ML19116A268 (31)
v • d • e


Text

Technical Specification 5.6.5.d A member of the STARS Alliance LLC Callaway Diablo Canyon Palo Verde Wolf Creek Palo Verde Nuclear Generating Station 5871 S. Wintersburg Road Tonopah, AZ 85354 102-07906-MDD/MSC April 26, 2019 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station Unit 1 Docket No. STN 50-528 Unit 1 Core Operating Limits Report, Revision 26

Dear Sirs:

Pursuant to Palo Verde Nuclear Generating Station Technical Specifications, Section 5.6.5.d, enclosed is the Unit 1 Core Operating Limits Report, Revision 26, which was made effective April 19, 2019. Figure 3.2.4-2 was updated in this revision. A revision bar has been applied to the change.

No commitments are being made to the NRC by this letter. Should you need further information regarding this submittal, please contact Matthew S. Cox, Licensing Section Leader, at (623) 393-5753.

Sincerely, Michael D. DiLorenzo Nuclear Regulatory Affairs Department Leader MDD/TMJ/mg

Enclosure:

Unit 1 Core Operating Limits Report, Revision 26 cc:

S. A. Morris NRC Region IV Regional Administrator S. P. Lingam NRC NRR Project Manager for PVNGS C. A. Peabody NRC Senior Resident Inspector for PVNGS Dilorenzo, Michael D(Z99838)

Digitally signed by Dilorenzo, Michael D(Z99838)

DN: cn=Dilorenzo, Michael D(Z99838)

Reason: I am approving this document Date: 2019.04.26 13:46:09 -07'00'

Enclosure PVNGS Unit 1 Core Operating Limits Report Revision 26

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Trimble, Patrick C(Z95337)

Digitally signed by Trimble, Patrick C(Z95337)

DN: cn=Trimble, Patrick C(Z95337)

Reason: I am the author of this document Date: 2019.04.16 13:08:45 -07'00'

Cowdin, Christophe r (Z12133)

Digitally signed by Cowdin, Christopher (Z12133)

DN: cn=Cowdin, Christopher (Z12133)

Reason: I have reviewed this document Date: 2019.04.16 13:30:29

-07'00'

Karlson, Charles F(V55086)

Digitally signed by Karlson, Charles F(V55086)

DN: cn=Karlson, Charles F(V55086)

Reason: I am approving this document Date: 2019.04.16 13:47:18

-07'00'

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1 2

3 4

5 6

7 0

100 200 300 400 500 600 SHUTDOWN MARGIN (% K/K)

COLD LEG TEMPERATURE (F)

FIGURE 3.1.1-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS OPEN REGION OF ACCEPTABLE OPERATION REGION OF UNACCEPTABLE OPERATION (350, 1.0)

(500, 5.0)

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100 200 300 400 500 600 SHUTDOWN MARGIN (% K/K)

COLD LEG TEMPERATURE (F)

FIGURE 3.1.2-1 SHUTDOWN MARGIN VERSUS COLD LEG TEMPERATURE REACTOR TRIP BREAKERS CLOSED REGION OF ACCEPTABLE OPERATION REGION OF UNACCEPTABLE OPERATION (350, 4.0)

(500, 6.5)

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-1.5

-1.0

-0.5 0.0 0.5 0

10 20 30 40 50 60 70 80 90 100 MODERATOR TEMPERATURE COEFFICIENT (x 104/°F)

CORE POWER LEVEL

(% OF RATED THERMAL POWER)

FIGURE 3.1.4-1 MTC ACCEPTABLE OPERATION, MODES 1 AND 2 MTC AREA OF ACCEPTABLE OPERATION (0%,0.5)

(100%,0)

(50%, 0.0)

(100%,-0.2)

(0%,-4.4)

(100%,-4.4)

Maintain Operation within Boundary TECH SPEC 3.1.4 Maximum Upper Limit

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10 20 30 40 50 60 MINIMUM REQUIRED POWER REDUCTION

(% OF RATED THERMAL POWER)

TIME AFTER DEVIATION, MINUTES FIGURE 3.1.5-1 CORE POWER REDUCTION AFTER CEA DEVIATION*

20 100% to

>80% RTP 16 12 8

4 0

15 80% to

>70% RTP 12 9

6 3

10 70% to

>45% RTP 8

6 4

2 5

45% RTP 4

3 2

1

  • WHEN CORE POWER IS REDUCED TO 35% OF RATED THERMAL POWER PER THIS LIMIT CURVE, FURTHER REDUCTION IS NOT REQUIRED.
  • NO POWER REDUCTION IS REQUIRED FOR A SINGLE CEA MISALIGNMENT IF THE FOLLOWING CONDITIONS ARE CONTINUOUSLY MET FROM THE TIME OF DEVIATION:

- > 95 % RATED THERMAL POWER

- COLSS IN SERVICE AND CEACS IN SERVICE

- AZIMUTHAL POWER TILT IS LESS THAN 3.0 %

- ALL CEAS REMAIN ABOVE 142.5" WITHDRAWN BY PULSE COUNTER AND ABOVE 140.1" WITHDRAWN BY RSPT INDICATION

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0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 150* 120 90 60 150*

30 120 0

90 150*

60 120 30 90 0

60 150*

30 120 0

90 150*

60 120 30 90 0

60 30 0

FRACTION OF RATED THERMAL POWER FIGURE 3.1.7-1 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS IN SERVICE)

NOTE:

See Footnote in Section 3.1.7 for applicability following a Reactor Power Cutback.

To meet the Transient Insertion Limit (TIL) all conditions below must be met:

CEA Groups 1 and 2 must be fully withdrawn* (see definition below) in MODE 1 and MODE 2.

AND CEA Group 3 must be fully withdrawn* for power levels 20%.

CEA Group 3 must be withdrawn 60" for power 0% and < 20%.

AND CEA Group 4 must be fully withdrawn* for power levels 70.87%.

CEA Group 4 must be withdrawn the group 4 TIL (TIL4) as indicated on the graph or by the equation:

TIL4 = (172.5" x Fractional Power) + 25.5" (for power 20% and < 70.87%).

AND CEA Group 5 must be withdrawn the group 5 TIL (TIL5) as indicated on the graph or by the equation:

TIL5 = (172.5" x Fractional Power) - 64.5" (for power 37.39% and 100%).

TRANSIENT INSERTION LIMIT GROUP 5 60 INCHES SHORT TERM STEADY STATE INSERTION LIMIT GROUP 5 108 INCHES LONG TERM STEADY STATE INSERTION LIMIT GROUP 3 60 INCHES GROUP 5 GROUP 4 GROUP 3 GROUP 2 GROUP 1

CEA POSITION (INCHES WITHDRAWN)

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30 120 0

90 150*

60 120 30 90 0

60 150*

30 120 0

90 150*

60 120 30 90 0

60 30 0

FRACTION OF RATED THERMAL POWER FIGURE 3.1.7-2 CEA INSERTION LIMITS VERSUS THERMAL POWER (COLSS OUT OF SERVICE)

NOTE:

See Footnote in Section 3.1.7 for applicability following a Reactor Power Cutback.

To meet the Transient Insertion Limit (TIL) all conditions below must be met:

CEA Groups 1 and 2 must be fully withdrawn* (see definition below) in MODE 1 and MODE 2.

AND CEA Group 3 must be fully withdrawn* for power levels 20%.

CEA Group 3 must be withdrawn 60" for power 0% and < 20%.

AND CEA Group 4 must be fully withdrawn* for power levels 54.97%.

CEA Group 4 must be withdrawn the group 4 TIL (TIL4) as indicated on the graph or by the equation:

TIL4 = (250.9" x Fractional Power) + 9.82" (for power 20% and < 54.97%).

AND CEA Group 5 must be withdrawn the group 5 TIL (TIL5) as indicated on the graph or by the equations:

TIL5 = (250.9" x Fractional Power) - 80.18" (for power 31.96% and 75.00%).

TIL5 = 108" (for power lever 75.00%).

TRANSIENT INSERTION LIMIT GROUP 5 60 INCHES SHORT TERM STEADY STATE INSERTION LIMIT GROUP 5 108 INCHES LONG TERM STEADY STATE INSERTION LIMIT GROUP 3 60 INCHES GROUP 5 GROUP 4 GROUP 3 GROUP 2 GROUP 1

CEA POSITION (INCHES WITHDRAWN)

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FRACTION OF RATED THERMAL POWER FIGURE 3.1.8-1 PART STRENGTH CEA INSERTION LIMITS VERSUS THERMAL POWER OPERATION ACCEPTABLE OPERATION UNACCEPTABLE OPERATION RESTRICTED LONG TERM STEADY STATE INSERTION LIMITS (112.5 INCHES)

TRANSIENT INSERTION LIMIT (75.0 INCHES)

(50% RATED THERMAL POWER)

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CORE POWER LEVEL

(% OF RATED THERMAL POWER)

FIGURE 3.2.3-1 AZIMUTHAL POWER TILT VERSUS THERMAL POWER (COLSS IN SERVICE)

REGION OF ACCEPTABLE OPERATION REGION OF UNACCEPTABLE OPERATION

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5 10 15 20 25 50 60 70 80 90 100 COLSS DNBR POWER OPERATION LIMIT REDUCTION

(% OF RATED THERMAL POWER)

CORE POWER LEVEL

(% OF RATED THERMAL POWER)

FIGURE 3.2.4-1 COLSS DNBR OPERATING LIMIT ALLOWANCE FOR BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL (95, 20)

(80, 5)

(70, 0)

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-0.20

-0.15

-0.10

-0.05 0.00 0.05 0.10 0.15 0.20 CPC MINIMUM DNBR CORE AVERAGE ASI FIGURE 3.2.4-2 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, CEAC(s) OPERABLE)

(-0.1, 1.99)

(-0.1, 2.28)

(0.06, 2.38)

(0.08, 2.07)

(0.1, 2.38)

(0.1, 2.07)

ACCEPTABLE OPERATION ANY POWER LEVEL AT LEAST 1 CEAC OPERABLE IN EACH OPERABLE CPC CHANNEL ACCEPTABLE OPERATION POWER AT OR ABOVE 90%

AT LEAST 1 CEAC OPERABLE IN EACH OPERABLE CPC CHANNEL UNACCEPTABLE OPERATION

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-0.10

-0.05 0.00 0.05 0.10 0.15 0.20 CPC MINIMUM DNBR CORE AVERAGE ASI FIGURE 3.2.4-3 DNBR MARGIN OPERATING LIMIT BASED ON THE CORE PROTECTION CALCULATORS (COLSS OUT OF SERVICE, BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL)

(-0.1, 3.27)

(0.0, 3.41)

(0.1, 3.41)

ACCEPTABLE OPERATION ANY POWER LEVEL BOTH CEACs INOPERABLE IN ANY OPERABLE CPC CHANNEL UNACCEPTABLE OPERATION

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