ML17109A365

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Pressure and Temperature Limits Report
ML17109A365
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 04/13/2017
From: Kreider R
Exelon Generation Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
NMP1L 3144 PTLR-1, Rev. 03.00
Download: ML17109A365 (34)
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Text

~ Exelon Generation Technical Specification 6.6.7 NMP1L 3144 April 13, 2017 U.S. Nuclear Regulatory Commission

. Attn: Document Control Desk Washington, DC 20555-001 Nine Mile Point Nuclear Station, Unit 1 Renewed Facility Operating License No. DPR-63 NRC Docket No. 50-220

Subject:

Nine Mile Point, Unit 1, Pressure and Temperature Limits Report Enclosed is a copy of the Pressure and Temperature Limits Report, PTLR-1, Revision 3 for Nine Mile Point Unit 1 (NMP1). This report is being submitted pursuant to NMP1 Technical Specification 6.6.7.b.

Should you have any questions regarding the informatfon in this submittal, please contact Dennis M. Moore, Manager Site Regulatory Assurance at (315) 349-5219.

Sincerely, 2~q.

Plant Manager, Nine Mile Point Nuclear Station Exelon Generation Company, LLC REK/RSP

Enclosures:

(1) Pressure and Temperature Limits Report for Nine Mile Point Unit 1 PTLR-1, Revision 3 cc: NRC Regional Administrator, Region I

.NRC Project Manager NRC Senior Resident Inspector

Enclosure 1 Pressure and Temperature Limits Report For Nine Mile Point Unit 1, PTLR-1, Revision 3

NMP1 Pressure and Temperature Limits Report NINE MILE POINT NUCLEAR STATION NINE MILE POINT UNIT 1 I

Pressure and Temperature Limits Report (PTLR)

PTLR'."1, Revision 03.00 Prepared by:

Mech./Struc. Design En nearing Date:~~

~ Q_TnJ~ / h-z. (J:X Reviewed by: Date: ~/ts/i7 Mech.~truc. Design Engineering

  • Approved by:

Approved by:

Senior Manager Date: ~/!7 Design Engineering

_

  • This Controlled Document provides reactor pressure vessel pressure and temperature limits for use in conjunction with the Nine Mile Point Unit 1 Technical Specifications. Document pages may only be changed through the re-issue of a revision to the entire document.

NMP1 Pressure and Temperature Limits Report Table of Contents Section 1.0 Purpose 1

2.0 Applicability 1

3.0 Methodology 2

4.0 Operating Limits 3

5.0 Discussion 4

6.0 References 7

Figure 1 NMP1 Pressure Test (Curve A)

Figure 2 10 NMP1 Normal Operation (Heatup and Cooldown) - Core Not Critical (Curve 8) 11 Figure 3

  • NMP1 Normal Operation (Heatup and Cooldown - Cofe Critical (Curve C)

Figure 4 12 NMP1 Feedwater Nozzle Finite Element Model 13

  • Table 1 NMP1 Pressure Test (Curve A) - Beltline Region, EOC 25 Table 2 14 NMP1 Normal Operation - Core Not Critical (Curve 8), Beltline Region, EOC 25 16 Table 3 NMP1 Normal Operation - Core Critical (Curve C), EOC 25 Table 4 18 NMP1 ART Calculations for 46 EFPY Table 5 20 Heat Transfer Coefficients for NMP1 Feedwater Nozzle Table 6 21 Feedwater Nozzle Material Properties 22 Appendix A NMP1 Reactor Vessel Materials Surveillance Program 23 i.

PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report 1.0 PURPOSE The purpose of the Nine Mile Point Nuclear Station Unit 1 (NMP1) Pressure and Temperature Limits Report (PTLR) is to present operating limits relating to:

1. Reactor Coolant System (RCS) Pressure versus Temperature limits during Heatup, Cooldown and Hydrostatic/Class 1 Leak Testing.
2. RCS Heatup and Cooldown rates.
3. Reactor Pressure Vessel (RPV) head flange bolt-up temperature limits.

This.report has been prepared in accordance with the requirements of Technical Specification (TS) Section 6.6.7, "Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR)," and the template provided in Licensing Topical Report SIR-05-044, Revision O (Reference 6.1 ).

2.0 APPLICABILITY This report is applicable to the NMP1 RPV until the end of operating cycle 25. The following TS sections are affected by the information contained in this report:

  • Limiting Condition for Operation Section 3.2.1, *"Reactor Vessel Heatup and Cooldown Rates."
  • Limiting Condition for Operation Section 3.2.2, "Minimum Reactor Vessel Temperature for Pressurization."

Page 1of23 PTLR-*1 Revision 03.00

NMP1 Pressure and Temperature Limits Report 3.0 METHODOLOGY The limits in this report were derived as follows:

(1) The methodology used to calculate the pressure and temperature limits is in accordance with Reference 6.1, which has been approved for BWR use by the NRC. The pressure and temperature limit calculations are documented in Reference 6.2.

(2) The neutron fluence is calculated in accordance with NRC Regulatory Guide (RG) 1.190 (Reference 6.3) based on the wetted surface fluence that is documented in Reference 6.23. The methodology used to calculate the RPV neutron fluence has been approved by the NRC in Reference 6.5.

(3) The adjusted reference temperature (ART) values for the limiting beltline materials are calculated in accordance with NRC Regulatory Guide 1.99, Revision 2 (Reference 6.6),

as documented*in Reference 6.7 as amended by Reference 6.24.

(4) This revision of the pressure and temper~ture limits is to incorporate the following changes:

  • Rev. O - Initial issue of PTLR.
  • Rev. 01.00:

o Removed 28 EFPY curves/tables which are no longer valid o Limited the use of the 36 EFPY curves/tables until the end of operating cycle (EOC) 22 o Removed 46 EFPY curves/tables which are not used during the curr~nt fluence period

  • o Added a footnote 4 and clarification to fourth bullet in Section 4.0 to make the described operating limit consistent with the applicable PTLR Figure.

o Previous Technical Specification Pressure-Temperature Limit. Figures only had one curve per Figure. The PTLR Figures include several curves. A note was added to the bottom of each PTLR figure indicating plant operation shall remain to the right of all of the curves shown in each Figure.

o Changed the legend for the temperature axis on each curve from "metal" temperature to "coolant" temperature to be consistent with the sample Figures 2-2 and 2-3 in Reference 6.1.

o Added a footnote 1 to the last two columns of the Curve A and B Tables to make more evident that the data in the last two columns was used to plot the respective curves with instrument uncertainty and static head corrections added. "

o Removed the 28 EFPY and 46 EFPY ART Calculation Tables corresponding.

to the removal of the 28 EFPY and 46 EFPY PT curves/tables.

Page 2of23 . PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report

  • Rev. 02.00:

o Included newly calculated ART values from Reference 6.24 to account for increased fluence values due to updated _cycle calculations and GNF2 fuel introduction.

o Included newly developed PT Curves A, B, and C which were produced .iri Reference 6.25 using the new ART values.

  • Rev. 03.00:

o Replaced the Table 4 calculated 36 EFPY ART values with 46 EFPY ART" values previously calculated in Reference 6.24.

o Replaced End-of-Cycle 22 PT Curves A, B, and C with End-of-Cycle 25 PT Curves A, B and C, which were previously produced in Reference 6.25.

Changes to the curves, limits, or parameters within this PTLR, based upon new irradiation fluence data of the RPV, or other plant design assumptions in the Updated Final Safety Analysis Report (UFSAR), can be made pursuant to 10 CFR 50.59, provided the above methodologies are utilized. The revised PTLR shall be submitted to the NRC upon issuance, in accordance with TS Section 6.6.7.

4.0 OPERATING LIMITS The pressure-temperature (P-T) limit curves included in this report represent steam dome pressure versus minimum vessel coolant temperature (as measured from recirculation loop suction) and incorporate the appropriate non-beltline limits and irradiation embrittlement effects in the beltline region.

The operating limits for pressure and temperature are required for three categories of operation:

(a) hydrostatic pressure tests and leak tests, referred to as Curve A; (b) core not critical operation (heatup and cooldown), referred to as Curve B; and (c) core critical operation (heatup and cooldown), referred.to as Curve C.

Complete P-T limit curves were developed for 28, 36 and 46 EFPY for NMP1, as documented in Reference 6.2. Only the NMP1 P-T limit curves for the current fluence period as documented in References 6.25 and 6.26 are included in this rep.ort. The applicable NMP1 P-T limit curves for this fluence period are included in Figures 1 through 3, and a tabulation of the curves* is included in Tables 1 through 3.

Page 3 of 23 PTLR<-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Other conditions applicable to the NMP1 RPV are:

  • Heatup and Cooldown rate limit during Hydrostatic and Class 1 Leak Testing (Figure 1:

Curve A): S 25"F/hour1 *

  • Normal Operating Heatup and Cooldown rate limit (Figure 2: Curve 8 - non-nuclear
  • heating, and Figure 3: Curve C - nuclear heating): S 100"F/hour2 *
  • RPV head installation temperature (i.e., bolt-up) and core not critical limit (Figure 1:

Curve A - Hydrostatic and Class 1 Leak Testing; Figure 2: Curve B - non-nuclear hea-ting): ~ 70"F 3 *

  • RPV flange and adjacent shell temperature core critical limit (Figure 3: Curve C -

nuclear heating):~ 100°F4

  • 5.0 DISCUSSION The adjusted reference temperature (ART) of the limiting beltline material is used to adjust

.beltline P-T curves to account for irradiation effects. Regulatory Guide 1.99, Revision 2 (Reference 6.6) provides the methods for determining the ART. The RG 1.99 methods for determining the limiting material and adjusting the P-T curves using ART are discussed in this section.

The vessel beltline copper (Cu) and nickel (Ni) values were obtained from the evaluation of the NMP1 vessel plate and weld materials (Reference 6.7). The Cu and Ni values were used with Tables 1 and 2 of RG 1.99 to determine a chemistry factor (CF) per Paragraph 1.1 of RG 1.99 for welds and plates, respectively.

1 Interpreted as: The temperature change in any 1-hour period is less than or equal to 25°F.

2 Interpreted as: The temperature change in any 1-hour period is less than or equal to 100°F.

3 A higher minimum bolt-up temperature of 70°F was applied to these curves, as compared to the 60°F value determined in Reference 6.2, in order to be consistent with the minimum bolt-up temperature value used in previous studies.

4 With water level within the normal range for power operation, the minimum criticality temperature of 1 OO"F is determined from the RTNDT of the closure flange region + 60"F.

Page 4 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report The peak RPV inside diameter (ID) fluence value of 1.74 x 1018 n/cm2 at 46 EFPY used in the P-T curve evaluation was obtained from Reference 6.23 for the limiting ART. Neutron fluence values were calculated using methods that conform to the guidelines of RG 1.190 (Reference 6.3). This fluence value applies to the limiting beltline lower shell plate (Heat No. P2112 for NMP1). The fluence value for the lower shell plate is based upon an attenuation factor of 0.652 for a postulated 1/4T flaw. As a result the 1/4T fluence for 46 EFPY for the limiting lower shell plate is 1.14 x 1018 n/cm2 . The peak RPV ID fluence validity period for the 46 EFPY curves remains until the end of operating cycle 25 (< 46 EFPY) as documented in Reference 6.26.

The P-T limit curves for the core not critical and core critical operating conditions at a given EFPY apply for both the 1/4T and 3/4T locations. When combining pressure and thermal stresses, it is usually necessary to evaluate stresses at the 1/4T location (inside surface flaw) and the 3/4T location (outside surface flaw). This is because the thermal gradient tensile stress of interest is in the inner wall during cooldown and is in the outer wall during heatup. However, as a conservative simplification, the thermal gradient stresses at the 1/4T location are ass.urned to be tensile for both heatup and cooldown. This results in the approach of applying the maximum tensile stresses at the 1/4T location. This approach is conservative because irradiation effects cause the allowable toughness at the 1/4T location to be less than that at the 3/4T location for a given metal temperature. This approach causes no operational difficulties, since the boiling water reactor is at steam saturation conditions during normal operation, which is well above the P-T curve limits.

For the core not critical curve (Curve 8) and the core critical curve (Curve C), the P-T curves are applicable for a coolant heatup and cooldown temperature rate of S 100°F/hr. However, the core not critical and the core critical curves were also developed to bou-nd transients defined on the RPV thermal cycle diagram and the nozzle thermal cycle diagrams. For the hydrostatic pressure and leak test curve (Curve A), a coolant heatup and cooldown temperature rate of S 25°F/hr must be maintained. The P-T limits and corresponding limits of either Curve A or B may be applied, if necessary, while achieving or recovering from test conditions. Thus, although Curve A applies during pressure testing, the limits of Curve B may be conservatively used during pressure testing if the pressure test heatup/cooldown rate limits cannot be maintained.

Page 5of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report The initial nil".'ductility transition reference temperature (RT Nor), the chemistry (weight-percent copper and nickel), and ART at the 1/4T location for all RPV beltline materials significantly affected by fluence (i.e., fluence > 1017 n/cm 2 for E > 1MeV) are shown in Table 4 for 46 EFPY, 1*

based on Reference 6.24. The initial RTNor values were determined and reported to the NRC in the NMP1 responses to NRC Generic Letter (GL) 92-01, Revision 1 (Reference 6.8) and GL 92-01, Revision 1, Supplement 1 (Reference 6.9). The NRC acknowledged these GL responses in letters dated March 30, 1994, August 26, 1996, and June 25, 1999 (References 6.10, 6.11, and 6.12, respectively). The initial RT Nor values shown in Table 4 have previously been used in establishing the current TS P-T limit curves (license amendment approved by the NRC in Reference 6.5) and in evaluations contained in the License Renewal Application (approved by the NRC in Reference 6.13).

Per Reference 6. 7 and in accordance with Appendix A of Reference 6.1, the NMP1 representative weld and plate surveillance materials data from the Boiling Water Reactor Vessel and Internals Project (BWRVIP) Integrated Surveillance Program (ISP) were reviewed. The representative heats of plate materials (P2112 and P2130) in the ISP are the same as the lower shell plate material in the vessel beltline region of NMP1. For plate heat P2112, since the scatter in the fitted results exceeds 1-sigma (1TF), the full 2-sigma margin term has been utilized in calculating the ART value for this plate in the vessel. For plate heat P2130, since the surveillance data was found to be credible, the margin term (cr11 = 1TF) is divided by two for the plate material when calculating the ART. Therefore, the CFs from the NRC's Reactor Vessel Integrity Database (Reference 6.14) and Reference 6.6 were used in the determination of ART for all NMP1 materials except for plate heat P2130.

The only computer code used in the determination of the NMP1 P-T curves was the ANSYS/Mechanical Release 6.1 (with Service Packs 2 and 3) finite element computer program (Reference 6.15) for the feedwater nozzle (non-beltline) stresses. This analysis was performed to determine through-wall thermal and pressure stress distributions for the NMP1 feedwater nozzles due to a step-change thermal transient (Reference 6.16). The ANSYS program was controlled under the vendor's 10 CFR 50 Appendix B Quality Assurance Program for nuclear quality-related work; Benchmarking consistent with NRC Generic Letter 83-11, Supplement 1 (Reference 6.17), was performed as a part of the computer program verification by comparing the solutions produced by the computer code to hand calculations for several problems. The following inputs were used in the finite element analysis:

Page 6of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report

  • With respect to operating conditions, stress distributions were developed for a thermal shock of 450°F, which represents the maximum thermal shock for the feedwater nozzle during normal operating conditions. The stress results for a 450°F shock are appropriate for use in developing the non-beltline P-T curves based on the limiting feedwater nozzle, as a shock of 450° F is representative of the Turbine Roll transient that occurs in the

. feedwater nozzle as part of the 1oo* F/hr startup transient. Therefore, these stresses represent the bounding stresses in the feedwater nozzle associated with 1OO"F/hr heatup/cooldown limits associated with the P-T curves for the upper vessel feedwater nozzle region.

  • Heat transfer coefficients were calculated from the governing design basis stress report for the NMP1 feedwater nozzle and from a model of the. heat transfer coefficient as a function of flow rate, as shown in Table 5 (Reference 6.16). The heat transfer coefficients were evalu.ated at flow rates that bound the actual operating conditio.ns in the feedwater nozzles at NMP1.
  • A two-dimensional, axisymmetric finite element model of the feedwater nozzle was constructed (Figure 4) using the same modeling techniques that were employed to evaluate the feedwater nozzle in the governing design basis report. In order to. properly model the.feedwater nozzle, the analysis was performed as a penetration in a sphere and not in a cylinder. To make up for this difference in geometry, a conversion factor of 3.2 times the cylinder radius was used to model the sphere (Reference 6.16). Material properties were evaluated at 325"F (Table 6) to conservatively bound the 100"F condition where the maximum stress occurred.

6.0 REFERENCES

1. Structural Integrity Associates Report No. SIR-05-044-A, Revision 0, "Pressure-Temperature Limits Report Methodology for Boiling Water Reactors," April 2007.
2. Structural Integrity Associates Calculation No. 0800297.301, Revision 1, "Revised Pressure-Temperature Curves," January 2009.
3. NRC Regulatory Guide 1.190, "Calculational and Dosimetry Methods for Determining Pressure Vessel* Neutron Fluencf3, March 2001.
4. "Neutron Transport Analysis for Nine Mile Point Unit 1," Report Number MPM-405778, MPM Technologies, May 2006.

Page 7of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report

5. NRC Letter to NMPNS dated October 27, 2003, "Nine Mile Point Nuclear Station, Unit No. 1, Issuance of Amendment Re: Pressure-Temperature Limit Curves (TAC No.

M86687)."

6. NRC Regulatory Guide 1.99, Revision 2, "Radiation Embrittlement of Reactor Vessel Materials," May 1988.
7. Structural lnteg.rity Associates Calculation No. 0800297.300, Revision 1, ;,Evaluation of Adjusted Reference Temperature Shifts," August 2008.
8. NRC Generic Letter 92-01, Revision 1, "Reactor Vessel Structural Integrity," March 6, 1992.
9. NRC Generic Letter 92-01, Revision 1, Supplement 1, "Reactor Vessel Structural Integrity," May 19, 1995.
10. NRC Letter to Niagara Mohawk Power Corporation (NMPC) dated March 30, 1994, "Generic Letter (GL) 92-01, Revision 1, 'Reactor Vessel Structural Integrity,' Nine Mile Point Nuclear Station Unit No. 1 (NMP-1) (TAC No. M83486)."
11. NRC Letter to NMPC dated August 26, 1996, "Closeout for Niagara Mohawk Power Corporation (NMPC) Response to Generic Letter 92-01, Revision 1, Supplement 1 for the Nine Mile Point Nuclear Station, Unit Nos. 1 & 2 (TAC Nos. M92700 and M927001)."
12. NRC Letter to NMPC dated June 25, 1999, "Response to Request for Additional Information Regarding Generic Letter 92-01, Revision 1, Supplement 1, 'Reactor Vessel Structural Integrity,' Nine Mile Point Nuclear Station, Unit Nos. 1 & 2 (TAC Nos. MA 1200 and MA1201)."
13. NUREG-1900, "Safety Evaluation Report Related to the License Renewal of Nine Mile.

Point Nuclear Station, Units 1 and 2," September 2006.

14. U. S. Nuclear Regulatory Commission, "Reactor Vessel Integrity Database Version 2.0.1," September 7, 2000.
15. ANSYS/Mechanical Release 6.1 (w/Service Packs 2 and 3), ANSYS, Inc., April 2002.
16. Structural Integrity Associates Calculation No. NMP-09Q-302, Revision 0, "Feedwater Nozzle Green's Functions for Nine Mile Point Unit 1."
17. NRC Generic Letter 83-11, Supplement 1, "Licensee Qualification for Performing Safety Analyses," June 24, 1999.
18. NRC Letter to NMPNS dated November 8, 2004, "Nine Mile Point Nuclear Station Unit Nos. 1 and 2 - Issuance of Amendments Re: Implementation of the Reactor Pressure Vessel Integrated Surveillance Program (TAC Nos. MC1758 and MC1759)."
19. G.E. Drawing No. 237E434, "Loadings Reactor Vessel."
  • Page 8of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report

20. "Neutron Transport Analysis for Nine Mile Point Unit 1," Report Number MPM-1209877, MPM Tecnologies, December 2009.
21. Engineering Change Notice, ECN No. N1-09-022 0800297.300-01.00 Rev. 000.
22. Calculation Change Notice, CCN No. N1-09-022 0800297.301-01.00 Rev. 000
23. "Neutron Transport Analysis for Nine Mile Point Unit 1," Report Number MPM-611914, MPM Tecnologies, December 2011.
24. Engineering Change Notice, ECN No. ECP-10-000337-CN-006 0800297.300-01.00 Rev. 000.
25. Calculation Change Notice, CCN No. ECP-10-000337-CN-007 0800297.301-01.00 Rev. 000
26. Calculation Change Notice No. ECP-16-000510-CN-001 0800297.301-01.00 Rev. 0000.

Page 9of23 PTLR-1 Revision 03.00

.NMP1 Pressure and Temperature Limits Report Figure 1: NMPl Pressure Test (Curve A)

Curve is Valid Until End of Operation Cycle 25 1900 1800 . .

1700 ..

1600 1500 .

1400 .. . .

1300 bO "iii

.e

_, 1200  ; ..

w V)

V)

~ 1100 IX 0

t 1000 .

c:r:

w IX

~

I-900

~

w IX 800 V)

V) w 700 .,

I

- - Bottom Head --

>-f-IX a.

600 --

>-f-

>-f-r->-

Upper Vessel >-f-C-f-500 _,_

>-f-Bolt-up >-I-'-

400 Temp:

70°

- Beltline Region 300 200 100 0

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 MINIMUM REACTOR VESSEL COOLANT TEMPERATURE (°F)

(MAINTAIN PLANT OPERATION TO THE RIGHT OF ALL CURVES)

Page 10 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report FIGURE 2: NMPl Normal Operation (Heatup and Cooldown)

Core Not Critical {Curve B)

Curve is Valid Until End of Operating Cycle 25 HSUU .-

  • 1700 1600 ..

1500 1400 1300 bii

'iii

..!:!:: 1200 w

11'1

~ 1100

  • I a:

0 t:; 1000 .-

er:

w  :

a:

z 900

  • I-

~

  • 800 w

a:

11'1

  • 11'1 w

700 a:

c..

  • I 600 I - *Bottom Head --

500 Bolt-up ---

Temp:

70° I I

I

...... Upper Vessel ---

400

. . ,_ I I

.- ~

- Beltline Region 300 . ......

200 100 0

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 MINIMUM REACTOR VESSEL COOLANT TEMPERATURE (°F)

(MAINTAIN PLANT OPERATION TO THE RIGHT OF ALL CURVES)

Page 11of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Figure 3: NMPl Normal Operation (Heatup and Cooldown)-

Core Critical (Curve C)

Curve is ValidUntil End of Cycle 25 1900 1800 1700 1600 lSOO 1400

i 1300 I VI VI a.

ii:! 1200

  • w

> 1100 0:

g 0

1000 .

0:: I 2 900

E 800 w

c:

700

i VI VI w ,

0::

0. 600
  • 500 D Minhm1m 400 Criticality:

100"F 300 200 100 0

0 20 40 60 so 100 120 140 160 180 200 220 240 260 280 300 320 340 MINIMUM REACTOR VESSEL COOLANT TEMPERATURE (°F)

MAINTAIN PLANT OPERATION TO RIGHT OF CURVE Page 12 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Figure 4: NMP1 Feedwater Nozzle Finite Element Model l J\N""

h i":' x Feedwater Nozzle Finite Element Model Page 13 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperatu re Limits Report Table 1: NMPl Pressure Test (C urve A) - Beltline Region, EOC 25 Plant = NMP-1 Component = Beltllne {penetrations portion)

Vesse l thickness, t = 7.125 inches Vesse l Radius, R = 106.5 Inches ART = 171.2 "F ====> 46 EFPY Ku= 0 {no thermal effects)

Safety Factor = 1.5 Mm = 2.472 Temperature Adjustment = 4.0 'F {instrument uncertainty)

Pressure Adjustment = 27.7 Pressu re Adjustment = 10.0 psig (instrument uncertai nty)

(1) (1)

Ga uge Fluid Temperature ACJUStea Pressure for Tempe rat ure Kim Gauge for P-T Curve P-T urve

(' F) K,, (ksi*llin) (ksi*llin) Pressure (psig) (' F) (psig) 56 35 .27 23 .51 0 70 0 56 35 .27 23.51 636 70 599 58 35 .35 23.57 638 70 600 60 35 .44 23.63 640 70 602 62 35.53 23 .69 641 70 603 64 35 .63 23.75 643 70 605 66 35 .73 23.82 645 70 607 68 35.83 23.89 647 72 609 70 35.94 23 .96 649 74 611 72 36.05 24.03 651 76 613 74 36.17 24.11 653 78 615 76 36.29 24.19 655 80 617 78 36.41 24.28 65 7 82 619 80 36.55 24.36 659 84 622 82 36.68 24.46 662 86 624 84 36.82 24.55 664 88 627 86 36.97 24.65 667 90 629 88 37.13 24.75 670 92 632 90 37.29 24.86 673 94 635 92 37.45 24.97 676 96 638 94 37.63 25.08 679 98 641 96 37.81 25.21 682 100 645 98 38.00 25.33 686 102 648 100 38.19 25.46 689 104 651 102 38.40 25.60 693 106 655 104 38.61 25.74 697 108 659 106 38.83 25.89 701 110 663 108 39.06 26.04 705 112 667 110 39.30 26.20 709 114 671 112 39.55 26.36 714 116 676 114 39.80 26.54 718 118 681 116 40.07 26.72 723 120 685 118 40.35 26.90 728 122 690 120 40.65 27.10 733 124 696 122 40.95 27.30 739 126 701 124 41.27 27.51 745 128 707 126 41.60 27.73 751 130 713 128 41.94 27.96 757 132 719 130 42.30 28.20 763 134 725 132 42 .67 28.44 770 136 732 134 43.05 28.70 777 138 739 136 43 .46 28.97 784 140 746 138 43 .87 29.25 792 142 754 140 44 .31 29.54 800 144 762 142 44.76 29.84 808 146 770 144 45.23 30.16 816 148 779 146 45 .73 30.48 825 150 787 148 46.24 30.82 834 152 797 Page 14 of 23 PTLR-1 Revision 03. 00

NMP1 Pressure and Temperatu re Limits Report Table 1 (Continued) (1)

(1) Adjusted Gauge Flu id Temperature Pres sure for Temperature Kim Gauge for P-T Curve P-T urve

(' F) Kie (ksi*Vin) (ksi*\/in) Pressure (psig) (' F) (psig) 150 46.77 31.18 844 154 806 152 47.32 31.55 854 156 816 154 47 .90 31 .93 864 158 827 156 48.50 32.33 875 160 837 158 49 .12 32.75 886 162 849 160 49.77 33 .18 898 164 860 162 50.45 33.63 910 166 873 164 51 .15 34.10 923 168 885 166 51.89 34.59 936 170 899 168 52.65 35 .10 950 172 91 2 170 53 .44 35 .63 964 174 927 172 54 .27 36.18 979 176 942 174 55 .13 36.75 995 178 957 176 56.02 37.35 1011 180 973 178 56.95 37.97 1028 182 990 180 57.92 38.62 1045 184 1007 182 58.93 39.29 1063 186 1026 184 59.98 39.99 1082 188 1045 186 61.08 40 .72 1102 190 1064 188 62.21 41.48 1123 192 1085 190 63 .40 42 .27 1144 194 1106 192 64.63 43.09 1166 196 1129 194 65 .91 43.94 1189 198 1152 196 67.25 44 .83 1213 200 1176 198 68 .64 45 .76 1239 202 1201 200 70.08 46 .72 1265 204 1227 202 71.59 47 .73 1292 206 1254 204 73.16 48.77 1320 208 1282 206 74.79 49 .86 1349 210 1312 208 76.48 50.99 1380 212 1342 210 78.25 52 .17 1412 214 1374 212 80.09 53 .39 1445 216 1407 214 82.00 54 .67 1480 218 1442 216 83 .99 56.00 1516 220 1478 218 86.07 57.38 1553 222 1515 220 88.22 58.82 1592 224 1554 222 90.47 60. 31 1632 226 1595 224 92.81 61.87 1675 228 1637 226 95 .24 63 .49 1719 230 1681 228 97.77 65.18 1764 232 1727 230 100.41 66 .94 1812 234 1774 232 103.15 68.77 1861 236 1824 234 106.00 70.67 1913 238 1875 (1) DATA IN THESE COLUMNS WERE USED TO PLOT P-T CURVES AND INCLUDE INSTRUMENT UNCERTAINTIES/STATIC HEAD CORRECTION.

Page 15 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 2: NMPl Normal Operation - Core Not Critical (Curve B) Beltline Region, EOC 25 Plant = NMP-1 Beltllne Comoonent = (oe netrations oortio nl Vessel thickness, t = 7.125 in ches Vessel Radius, R = 106.5 in ches ART = 171.2 "F =====> 46 EFPY K11= 12.91 Safety Factor = 2 Mm= 2.472 Temperature Adjustm ent = 12.2 'F (instrument uncertainty)

Pressure Adjustment = 27.7 psig (hydrostatic pressure head for a full vessel at 70'F)

Pressure Adjustment = 52.2 psig (instrument uncertainty)

Heat Up and Cool Down Rate = 100 'F/Hr (1)

(1) Adjusted Gauge Fluid Temperature Pressure for Temperature Kim Gauge for P-T Curve P-TCurve

(' F) K. (ksi*"in) {ksi*"in) Pressure (psig) {'F) (psig) 48 34 .96 11.03 0 70 0 48 34.96 11.03 298 70 219 so 35 .04 11.06 299 70 219 52 35 .11 11 .10 300 70 221 54 35 .19 11.14 301 70 222 56 35.27 11.18 303 70 223 58 35.35 11.22 304 70 224 60 35.44 11.26 305 72 225 62 35 .53 11.31 306 74 226 64 35 .63 11.36 307 76 228 66 35.73 11.41 309 78 229 68 35.83 11.46 310 80 230 70 35.94 11.51 312 82 232 72 36.05 11.57 313 84 233 74 36.17 11.63 315 86 235 76 36.29 11.69 316 88 236 78 36.41 11.75 318 90 238 80 36.55 11.82 320 92 240 82 36.68 11 .88 322 94 242 84 36.82 11.96 324 96 244 86 36.97 12.03 326 98 246 88 37.13 12.11 328 100 248 90 37.29 12.19 330 102 250 92 37.45 12.27 332 104 252 94 37.63 12.36 334 106 255 96 37.81 12.45 337 108 257 98 38.00 12.54 339 110 260 100 38.19 12.64 342 112 262 102 38.40 12.74 345 114 265 104 38.61 12.85 348 116 268 106 38.83 12.96 351 118 271 108 39.06 13.07 354 120 274 110 39.30 13 .19 357 122 277 112 39.55 13.32 360 124 281 114 39.80 13.45 364 126 284 116 40.07 13.58 368 128 288 118 40.35 13.72 371 130 291 120 40.65 13.87 375 132 295 122 40.95 14.02 379 134 300 124 41.27 14.18 384 136 304 126 41.60 14.34 388 138 308 128 41.94 14.51 393 140 313 130 42 .30 14.69 398 142 318 132 42 .67 14.88 403 144 323 134 43.05 15.07 408 146 328 136 43.46 15.27 413 148 333 138 43 .87 15.48 419 150 339 Page 16 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperatu re Limits Report Table 2 (Continued) (1)

(1) Adjusted Gauge Fluid Temperature Pressure for Te mperature Kim Gauge fo r P-T Curve P-T Curve

(' Fl Kk (ksi*vinl (ksi*vinl Pressure (psigl (' Fl (psigl 140 44 .31 15.70 425 152 345 142 44 .76 15.92 431 154 351 144 45.23 16.16 437 156 358 146 45 .73 16.41 444 158 364 148 46 .24 16.66 451 160 371 150 46.77 16.93 458 162 378 152 47 .32 17.20 466 164 386 154 47.90 17.49 473 166 394 156 48.50 17.79 482 168 402 158 49.12 18.10 490 170 410 160 49.77 18.43 499 172 419 162 50.45 18.77 508 174 428 164 51 .15 19.12 518 176 438 166 51.89 19.49 527 178 448 168 52.65 19.87 538 180 458 170 53.44 20.26 548 182 469 172 54.27 20.68 560 184 480 174 55.13 21.11 571 186 491 176 56.02 21 .55 583 188 504 178 56.95 22 .02 596 190 516 180 57.92 22 .51 609 192 529 182 58.93 23.01 623 *194 543 184 59.98 23.53 637 196 557 186 61.08 24.08 652 198 572 188 62 .21 24.65 667 200 587 190 63.40 25 .24 683 202 603 192 64 .63 25 .86 700 204 620 194 65 .91 26.50 717 206 637 196 67 .25 27 .17 735 208 655 198 68 .64 27 .86 754 210 674 200 70.08 28.59 774 212 694 202 71.59 29 .34 794 214 714 204 73.16 30.12 815 216 735 206 74.79 30.94 837 218 757 208 76.48 31.78 860 220 780 210 78.25 32.67 884 222 804 212 80.09 33 .59 909 224 829 214 82.00 34.54 935 226 855 216 83.99 35.54 962 228 882 218 86.07 36.58 990 230 910 220 88.22 37.66 1019 232 939 222 90.47 38.78 1050 234 970 224 92 .81 39.95 1081 236 1001 226 95 .24 41.16 1114 238 1034 228 97.77 42 .43 1148 240 1069 230 100.41 43.75 1184 242 1104 232 103 .15 45.12 1221 244 1141 234 106.00 46.55 1260 246 1180 236 108.98 48.03 1300 248 1220 238 112.07 49.58 1342 250 1262 240 115 .29 51.19 1385 252 1306 242 118.64 52.86 1431 254 1351 244 122.12 54.60 1478 256 1398 246 125.75 56.42 1527 258 1447 248 129.53 58.31 1578 260 1498 250 133.46 60.27 1631 262 1551 252 137.55 62.32 1687 264 1607 (1) DATA IN THESE COLUMNS WERE USED TO PLOT P-T CURVES AND INCLUDE INSTRUMENT UNCERTAINTIES/STATIC HEAD CORRECTION.

Page 17 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 3: NMPl Normal Operations - Core Critical (Curve C), EOC 25 Plant= NMP-1 Curve A Leak Test Temperature = 189.1 "F Curve A leak Test Pressure= 1,055 psig Unit Pressure 1,875 psig (hydrostatic pressure)

Flange RTNor= .___4

.._0_ _ "F Adjusted P-T Curve Adjusted P-T Temperature Curve

("F) Pressure (psig) .

100 0 100 113 102 117 104 122 106 127 108 131 110 136 112 141 114 147 116 153 118 159 120 165 122 172 124 179 126 186 128 194 130 202 132 210 134 219 136 228 138 238 140 248 142 250 144 252 146 255 148 257 150 260 152 262 154 265 156 268 158 271 160 274 162 277 164 281 166 284 168 288 170 291 172 295 174 300 176 304 178 308 180 313 182 318 184 323 186 328 188 333 190 339 192 345 194 351 196 358 198 364 200 375 200 371 202 378 Page 18 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 3 (Continued)

Adjusted P-T Curve Adj usted P-T Temperature Curve

(' F) Pressure (psig) 206 394 208 402 210 410 212 419 214 428 216 438 218 448 220 458 222 469 224 480 226 491 228 504 230 516 232 529 234 543 236 557 238 572 240 587 242 603 244 620 246 63 7 248 655 250 674 252 694 254 714 256 735 258 757 260 780 262 804 264 829 266 855 268 882 270 910 272 939 274 970 276 1001 278 1034 280 1069 282 1104 284 1141 286 1180 288 1220 290 1262 292 1306 294 1351 296 1398 298 1447 300 1498 302 1551 304 1607 306 1664 308 1724 310 1787 312 1852 Page 19 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 4: NMP1 ART Calculations for 46 EFPY

.... ,. I *' ~ """ ~-- ~ - ,.,_ *- - -- >,

Adjustn1tnts for 1/4T , "'

~ CodeNo. HeatNo. FluxlotNo. lpltlal RT~('f) ChemlSW' Q,emlstry ** 41tTa Marglr. Terms -ARTlllll'

... . Oi(wt%) JtiWt%) fattorm* rF) ~ aa('~ (4F)

Upper Shell Plate G-307-3 P2074 . 28 0.2 0.48 134.6 64.3 0 17 132.9 Ill Upper Shell Plate G-307-4 P2076 . 40 0.27 0.53 173.85 83.0 0 17 165.5

...QIIV Upper Shell Plate G-307-10 P2091 ,_ - 20 0.22 0.51 148.85 71.1 0 17 132.4 Q:

Lower Shell Plate -~:_8~1 ' . ~2112 . *--_-II;?"

    • ~-"

36 _,. 0~2~~ 0.503- 228.35 .JJ,6 0 - 17 171.2 Lower Shell Plate G*8*3/4 P2130A . -3 0.176 0.586 146.8 58.9 0 8.5 79.0

.. .. *~ ...

~-

"' . Adjustments for l/4T Descrfptlon C1'lfe No. HeatNo. FtuxlotNo. * 'lnttfal RTim, rFJ Chemistry ChemfstiY 6Rtimr Martin Terms A'aTi.or .

..,_ - I* Cu(~} N[wt%l. Factor(*F) ('~ . ad'f) f1A(*f) .t'F} __

"O Ill Upper Shel Axial Welds 2-564A/C 860548 4ESF -50 0.214 0.046 97.59 50.9 0 25.4 51.7 i Lower Shell Axial Welds 2-5640/F 860548 4E5F *SO 0.214 0.046 97.59 43.2 0 21.6 36.5

~ Circumferential Weld Seam 3-564 1248 4M2F -50 0.214 0.076 99.9 44.3 0 22.1 38.5

- - . ~ -

- - Fluence Data "

' Location Wall thickness Fluence at ID- Attenuftlon ~ Fluence at 1/4 T,f Ffuence Factor, FF .

Fun 1/4T (n/cm112) 1/4=e-0.z~x - (n/anA2) t(o.is.o.101og 6 -

Upper Shell Plate G-307-3 7.125 1.781 2.55E+18 0.652 1.66E+18 0.526 Ill Upper Shell Plate G-307-4 7.125 1.781 2.5SE+18 0.652 1.66E+18 0.526

~ Upper Shell Plate G-307-10 1.781 2.SSE+l8 1.66E+18 0.526 IV 7.125 0.652 a: Lower Shell Plate G-8-1 7.125 1.781 1.74E+18 0.652 l.14E+18 0.443 Lower Shell Plate G-8-3/4 7.125 1.781 1.74E+18 . 0.652 1.14E+l8 0.443 Ill Upper Shell Axial Welds 2-564A/C 7.125 1.781 2.49E+18 0.652 1.63E+18 0.521

'C i Lower Shell Axial Welds 2-5640/F 7.125 1.781 1.74E+l8 0.652 l.14E+18 0.443

~

Circumferential Weld Seam 3-564 7.125 1.781 1.74E+l8 0.652 l.14E+l8 0.443 Page 20 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 5: Heat Transfer Coefficients for NMP1 Feedwater Nozzle 0% Flow Case 100% Flow Case Heat Transfer Heat Transfer Tempera~ure Coefficient Temperature Coefficient 2

Region (°F) (Btu/hr-ft - °F) Region (°F) (Btu/hr-ft2-°F) 1 550.0 205.1 1 100.0 2108.8 2 550.0 205.1 2 325.0 673.9 3 550.0 205.1 3 325.0 191.8 4 550.0 205.1 4 550.0 1000.0 Page 21 of 23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report Table 6: Feedwater Nozzle Material Properties Material Propertie~

Aii Steels: Poisson's Ratio 0. 3 Density 0.283

.Reactor Vessel Plate {SA 302. Gr.B) (5, Matertat Group D]

T C( *E Thermal Cond1.1CtMty, K Thermsr Diffusivity Specific Heat, Cp F fnlin""F psi BTU/hr"ft'i!F ft 2lhr BTUJJb1<F 300 7.74E-06 2.80E+07 24.7 0.42 0.12 350 7.88E..06 24 .. 7 0.409 0.123 400 8.01E-06 2.74E+07 24.6 0..398 0.126 325 7.81E-06 2.79E+o7 24.7 0.4145 0.1215 Nozzle Forging {SA 336 with Code Case 1236-1) {5, Material Group A]

T a E Thermal ConductMty, K nJermal Diffusivity S;pecific Heat, Cp F inlin'"F psi BTUlhr""ffkF ft 2/hr BTU/lb.,.F 300 7 .30E-06 2.85E+07 23.9 0.406 0.120 350 7.49E-06 23,7 0.396 0.122 400 7.00E--06 2.79E+07 23.6 0.385 0.125 325 7.396E-06 ,. 2.84E+07 23.8 0.401 0.121 Safe End (CS-I SA-105 Gr. II) "[5, Material Group BJ T a E Thermal Conductivity, K Thermal Diffusivity Specific Heat, Gp F inlin"F psi BTU!hr-.ft""F ft 2/hr BTU/lb*"F 300 7.18E-OO 2.81E+07 28.4 0.481 0.1207 350 7.47E-06 28.0 0.464 0.1234 400 2.75E+07 325 7.325E-06 ,. 2.80E+07 28.2 0.4726 0.1221 Page 22of23 PTLR-1 Revision 03.00

NMP1 Pressure and Temperature Limits Report APPENDIX A NMP1 REACTOR VESSEL MATERIALS SURVEILLANCE PROGRAM i

NMP1 has replaced the original materials surveillance program with the BWRVIP Integrated Surveillance Program (ISP). This program meets the requirements of 10 CFR 50, Appendix H, for integrated surveillance programs, and has been approved by the NRC (see NMP1 License Amendment No. 184, Reference 6.18). The representative plate material from the ISP is not the same heat number as the target plate in the NMP1 vessel. Also, the representative weld material is not the same heat number as the target weld in the NMP1 vessel. However, there is one matching plate heat number (heat number P2130-2) in the Supplemental Surveillance Program (SSP). Irradiated data is available from SSP capsules A, 8, D, G, E, and I (Reference 6.7). Under the ISP, there is one weld heat that is scheduled to be test.ed in 2017.

Representative surveillance capsule materials for the NMP1 weld are contained in the Hatch Unit 2 surveillance capsule program. Under the Supplemental Surveillance Program (SSP),

there are no additional representative capsule materials to be tested.

Page 23of23 PTLR-1 Revision 03.00

50.59 REVIEW COVERSHEET FORM LS-AA-104-1001 Revision 4 Page 1 of2 Station/Unit(s): Nine Mile Point Unit 1 Activity/Document Number: =E=C=P--1"""'6"----=-0=00""'5"-"'l,_,O'---------------- Revision Number: ~O~O_ _ _ __

Title:

Revise NMPl Design Documents Impacted by Reload 24 FCP/ECP NOTE: For 50.59 Evaluations, information on this form will provide the basis for preparing the biennial summary report submitted to the NRC in accordance with the requirements of 10 CFR 50.59(d)(2).

Description of Activity:

(Provide a brief, concise description of what the proposed activity involves.)

The UFSAR Section X.H.1.0 Spent Fuel Storage Pool Filtering and Cooling System Design Bases states: "For a normal (full core offload or core shuffle) refueling, the offload time to the spent fuel pool and the RBCLC temperatures shall be verified to be consistent with a bulk pool temperature not to exceed 140°F with one cooling train operating." This activity performs the required UFSAR verification for NlR24.

  • The UFSAR Section V.C.4.0 and Appendix C require P-T limit curves to be periodically revised to account for changes in fracture toughness of the RPV components due to anticipated neutron embrittlement effects for higher accumulated fluences. The proposed activity involves the revision of the P-T limits report to include revised P-T curves beyond the end-of-cycle 22.

Reason for Activity:

(Discuss why the proposed activity is being perfor~ed.)

The UFSAR Section X.H.2.0 System Design notes the limiting design basis offload rates assuming maximum RBCLC temperatures of95°F and a full core offload. The system design also states that "A more expedited offload may be performed if the plant conditions exist to maintain the pool water temperature at or below 140°F with one SFC train operating." This activity evaluates the specific plant conditions required to control the offload time and the RBCLC temperatures to ensure one loop of SFC train maintains the bulk pool temperature below 140°F..

ECP-16-000510 is the reload ECP for NIR24/Cycle 23. This reload core design will include an increase in enrichment for the upper and lower sections of the fuel bundles. This reload ECP also includes new TRACG LOCA analysis. These changes affect the core loading design. Hence, this reload ECP can affect the peak vessel fluence previously used to derive the 46 EFPY P-T curves. Calculation change notice (CCN) ECP-16-000510-CN-001 0800297.301-01.00 provides the technical basis to ensure previously developed 46 EFPY curves derived under previous ECPs remain conservative given the changes to neutron fluence.

The *46 EFPY P-T curves are being issued in Revision 3 to PTLR-1.

Effect of Activity:

(Discuss how the activity impacts plant operations, design bases, or safety analyses described in the UFSAR.)

The activity ensures the UFSAR requirement to verify and control the offload times and that RBCLC temperatures are sufficient to maintain the SFC bulk pool temperature below the 140°F design basis maximum assuming one SFC cooling loop operating.

This activity ensures previously developed PT curves referenced in plant procedures remain conservative for operation beyond cycle 22 up to the end-of-cycle 25.

Summary of Conclusion for the Activity's 50.59 Review:

(Provide justification for the conclusion, including sufficient detail to recognize and understand the essential arguments leading to the conclusion. Provide more than a simple statement that a 50.59 Screening, 50.59 Evaluation, or a License Amendment Request, as applicable, is not required.)

A 50.59 Screening was performed resulting in all five questions answered "no". The NlR24 offload restrictions and RBCLC restrictions are consistent with the UFSAR design basis requirements and do not required a 50.59 Evaluation, change to the Technical Specifications, or Facility Operating License. The PTLR revision is also consistent with UFSAR design basis requirements.

Attachments:

Attach all 50.59 Review forms completed, as appropriate.

50.59 REVIEW COVERSHEET FORM LS-AA-104-1001 Revision 4 Page 2 of2 Station/Unit(s): Nine Mile Point Unit 1 Activity/Document Number: =E=C=P~-1""'6'--=00=0=5'-"l"'""'O_ _ _ _ _ _ _ _ _ _ _ _ __ Revision Number: ""-00"----'----

Title:

Revise NMPI Design Documents Impacted by Reload 24 FCP/ECP Forms Attached: (Check all that apply.)

D Applicability Review

~ 50.59 Screening 50.59 Screening No. 5059-2017-120 Rev.

D 50.59 Evaluation 50.59 Evaluation No. Rev.

See LS-AA-104, Section 5, Documentation, for record retention requirements for this and all other 50.59 forms associated with the Activity.

50.59 SCREENING FORM LS-AA-104-1003 Revision 4 Page 1 of5 50.59 Screening No. 5059-2017-120 Rev. No. 00.00 Activity/Document Number: ECP-16-000510 Revision Number: 00.00

Title:

Revise NMPl Design Documents Impacted by Reload 24 FCP/ECP I. 50.59 Screening Questions (Check correct response and provide separate written response providing the basis for the answer to each question)(See Section 5 of the Resource Manual (RM) for additional guidance):

1. Does the proposed Activity involve a change to an SSC that adversely affects an UFSAR DYES ~NO described design function? (See Section 5.2.2.1 of the RM)

Fuel Bundle Offload Times:

The UFSAR Section X.H.1.0 Spent Fuel Storage Pool Filtering and Cooling System Design Basis states:

  • For a normal (ji1ll core ojjload or core shujjle) refi1eling, the ojjload time to the spentfi1el pool and the RBCLC temperatures shall be verified to be consistent with a bulk pool temperature not to exceed 140°Fwith one cooling train operating.

The UFSAR Section X.H.2.0 System Design notes the limiting design basis offload rates assuming maximum RBCLC temperature of95°F and a full core offload. The system design also states that "A more expedited ojjload may be performed if the pla"f!t conditions exist to maintain the pool water temperature at or below J 40°Fwith one SFC train operating."

The change notice ECP,16-000510-CN-002 to the design basis engineering calculation S14-54HX018 evaluates the N1R24 specific conditions to demonstrate that the core offload time and RBCLC temperatures are verified to ensure the bulk pool temperature does not exceed the UFSAR design basis maximum of 140°F.

The conclusion is that the activity is consistent with the UFSAR provisions to allow for crediting actual refueling offload conditions to verify that the design basis is maintained during the offload and is not a change to an SSC that adversely affects the UFSAR.

Revised Pressure Temperature Limits Report (PTLR-1):

UFSAR Section V.C.4.1 through V.C.4.6 describes the design basis and the design function of the pressure temperature curves and the fact that the P-T curves are maintained in the PTLR. The design function of the P-T curve limits as described in UFSAR is to specify maximum allowable pressure as a function ofreactor coolant temperature during heat-up, cooldown and core operation to ensure the reactor pressure boundary is operated with fracture toughness limits specified by ASME XI and 10CFR50 Appendix G.

UFSAR Section C.2.1.2 states that the P-T limit curves will be periodically revised to account for changes in fracture toughness of the RPV components due to anticipated neutron embrittlement effects for higher accumulated fluences. This section also states that the calculation of P-T limit curves using the projected fluence at the end of the period of extended operation would result in unnecessarily restrictive operating curves. However, projection of the adjusted reference temperature (ART), which is used in development of the curves, to the end of the period of extended operation provides assurance that development of P-T limit curves will be feasible up to the maximum predicted effective full power year (EFPY).

ECP-16-000510 is the reload ECP for N1R24/Cycle 23. This reload core design will include an increase in enrichment for the upper and lower sections of the fuel bundles. This reload ECP also includes new TRACG LOCA analysis. These changes affect the core loading design. Hence, this reload ECP can affect the peak vessel fluence previously used to derive the 46 EFPY P-T curves.

Calculation change notice (CCN) ECP-16-000510-CN-001 0800297.301-01.00 provides the technical basis to ensure previously developed 46 EFPY curves derived under previous ECPs

50.59 SCREENING FORM LS-AA-104-1003 Revision 4 Page 2 of5 50.59 Screening No. 5059-2017-120 Rev. No. 00.00 Activity/Document Number: ECP-16-000510 Revision Number: 00.00

Title:

Revise NMPl Design Documents Impacted by Reload 24 FCP/ECP remain conservative given the changes to neutron fluence. The 46 EFPY P-T curves are being issued in Revision 3 to PTLR-1.

The CCN determined that the projected fluence used to develop the 46 EFPY curves in PTLR-1 Revision 3 is bounded until the end-of-cycle 25 despite the potential impacts on fluence created

.by the reload ECP core design. Therefore, the function of the P-T curves as described in the UFSAR is not adversely impacted by the new curves incorporated into PTLR-1Revision3.

2. Does the proposed Activity involve a change to a procedure that adversely affects how UFSAR DYES ~NO described SSC design functions are performed or controlled? (See Section 5.2.2.2 of the RM)

Fuel Bundle Offload Times:

The UFSAR Sections X.H.1.0 and 2.0 provision to control the offload time and RBCLC temperature are implemented through operating procedures that provide the specific offload and RBCLC restrictions based on the cycle specific N1R24 conditions. The restrictions on the offload time and RBCLC temperature are defined in the calculation and through the ECP-15-000510-CN-002 procedure changes are implemented to Nl-OP-4 and Nl-OP-34.

The conclusion is that the changes to the procedures are consistent with the UFSAR design basis as noted in question I and therefore the change does not adversely affect how the UFSAR described SSC design functions are performed or controlled.

Revised Pressure Temperature Limits Report CPTLR-1):

The PTLR curves are directly referenced and/or pressure/temperature values from the curves are directly incorporated into plant operating, maintenance and surveillance procedures Nl-OP-34, NI-OP-43A, Nl-OP-43C, Nl-ST-R30 and Nl-MMP-GEN-901.

The above listed procedures are not adversely affected by the 46 EFPY curves added to the PTLR provided the curves are limited for use until the end-of-cycle 25 as evaluated in ECP-16-00051 O-CN-001 0800297.301-01.00 for the potential changes to fluence resulting from the reload ECP.

Nl-OP-34, Nl-OP-43A and Nl-OP-43C provide direction to operate, cooldown and heat-up the reactor within the limits of the PTLR curves. The new PT curves do not adversely restrict operation of the station as there is significant operating margin to the right of the curves. The latest revision ofNl-ST-R30 (Revision 13) used pressure/temperature values based on a previously derived and approved PT Pressure Test Curve A for 46 EFPY in ECP-10-000337-CN-007 0800297.301. ECP-16-000510-CN-001 0800297.301-01.00 has determined that the pressure/temperature values in the existing revision ofN1-ST-R30 remain valid until the end-of-operating cycle 25. Nl-MMP-GEN-901 incorporates allowable bolt-up temperatures described in the USFAR. The revised PTLR does not change the allowable bolt-up temperature.

3. Does the proposed Activity involve an adverse change to an element of a UFSAR described DYES ~NO evaluation methodology, or use of an alternative evaluation methodology, that is used in establishing the design bases or used in the safety analyses? (See Section 5.2.2.3 of the RM)

Fuel Bundle Offload Times:

The UFSAR does not provide a specific methodology for performing the verification of maximum spent fuel temperature for defining the offload times to the spent fuel pool.

The NMPI GNF2 Cycle Independent Analyses document provides the cycle-independent decay

50.59 SCREENING FORM LS-AA-104-1003 Revision 4 Page 3 of5 50.59 Screening No. 5059-2017-120 Rev. No. 00.00 Activity/Document Number: ECP-16-000510 Revision Number: 00.00

Title:

Revise NMPl Design Documents Impacted by Reload 24 FCP/ECP heat safety analysis for GNF2 fuel at Nine Mile Point Unit I. Per table 3.3, Decay Heat Inputs for NMP-1 GNF2 _Equilibrium cycle, ANSI/ANS-51.1-1979 (including GE SIL No. 636) was used as the standard to calculate the decay heat values. The decay heat values for N1R24 were evaluated under ANSI/ANS-5.1-1994, which also included GE SIL No. 636. Analysis of both cases was performed under Attachment A in ECP-16-000510 and shows consistency between the GNF2 safety analysis and the.cycle-specific decay heat values within 2cr and does not constitute an adverse change.

The specific evaluation of the core shuffle conditions where the spent fuel pool is considered the combined spent fuel pool and vessel cavity with the spent fuel pool gates open is included in the Sl4-54HX018 GOTHIC model. The conditions where the reactor shutdown cooling system is secured and the single spent fuel pool cooling loop is evaluated to maintain the combined cavity and pool below 140°F is evaluated consistent with the base calculation. To ensure a conservative interpretation of the UFSAR design requirement the pool average conditions include the average core exit bulk cavity temperature remains below the 140 degree limit. This condition defines the restrictions on RBCLC temperature and core offload time restrictions. The offload time restrictions and RBCLC restrictions are defined in the calculation and implemented conservatively into the operating procedures.

Revised Pressure Temperature Limits Report (PTLR-1):

UFSAR Section V.C.4.1 describes the PT limit curves as being developed using the methodology specified in Licensing Topical Report SIR-05-044-A and ASME Code Case N-640, as well as 10CFR50 Appendix G, and the 1989 Edition of ASME Section XI, Appendix G.

The PTLR-1Revision3 PT limit curves were developed under a previous ECP using the same methodology described in UFSAR Section V.C.4.1.

UFSAR Sec.tion V.C.4.3 describes the PT limit curve for the in-service system pressure tests being based on a calculated adjustment to the RTNDT* based on Revision 2 ofRG 1.99 to account for the effect of fast neutrons. Similarly section V.C.4.5 describes the use ofRG 1.99 methodology to adjust the nil-ductility reference temperature.

The PTLR-1 Revision 3 PT limit curves for the in-service system pressure tests and core critical and not critical heat-up and 'cooldown used the methodology ofRG 1.99 Revision 2 to adjust the RTNDT.

UFSAR Section V.C.4.6 describes that reactor vessel neutron fluence has been evaluated using a method in accordance with the recommendations ofRG 1.190, "Calculational and Dosimetry Methods for Determining Pressure Vessel Neutron Fluence," dated March 2001. Future evaluations ofreactor vessel fluence will be completed using a methop in accordance with the recommendations ofRG 1.190.

CCN ECP-16-000510-CN-001 0800297.301-01.00 used a previous fluence calculation spreadsheet to extrapolate and project fluence at the end-of-cycle 25. The previous fluence calculation spreadsheet was developed using the methodology described in UFSAR Section V.C.4.6.

Based on the above review the proposed change to the PT limits report does not involve a change in PT limit cu.rve calculation methodology described in the UFSAR.

4. Does the proposed Activity involve a test or experiment not described in the UFSAR, where an DYES [8JNO SSC is utilized or controlled in a manner that is outside the reference bounds of the design for that

50.59 SCREENING FORM LS-AA-104-1003 Revision 4 Page 4 of5 50.59 Screening No. 5059-2017-120 Rev. No. 00.00 Activity/Document Number: ECP-16-000510 Revision Number: 00.00

Title:

Revise NMPl Design Documents Impacted by Reload 24 FCP/ECP SSC or is inconsistent with analyses or descriptions in the UFSAR? (See Section 5.2.2.4 of the RM)

Fuel Bundle Offload Times:

The restrictions established on RBCLC and offload parameters are based on the engineering calculation for the NlR24 offload and are cycle specific. These restrictions control the same parameters on the offload and RBCLC in previous cycles to ensure the spent fuel pool remains below 140 degrees with one SFC loop in service.

Therefore the restrictions established and implemented in the OP changes are consistent with the UFSAR Section X.H provisions and this activity does not involve a test or experiment not described in the UFSAR where an SCC is utilized or controlled in a manner that is outside the reference bounds.

Revised Pressure Temperature Limits Report (PTLR-1):

The revised PTLR incorporates new pressure temperature curves that have accounted for the potential effects of neutron fluence changes using methods previously described in the USF AR.

Therefore, use of the revised PT curves is does not involve a test or experiment.

5. Does the proposed Activity require a change to the Technical Specifications or Facility Operating DYES [gjNO License? (See Section 5.2.2.5 of the RM)

No changes are required to either the Technical Specifications or the Facility Operating License.

Tech Spec S.ection 1.18 states that the PTLR limit curves shall be determined for each fluence period in accordance with Specification 6.6.7.

Tech Specs 3 .2.113 .2.2 requires reactor vessel heat-up, cool down rates, low temperature operation, criticality and in-service leakage testing be maintained within the limits of the PTLR.

Tech Spec 6.6.7 describes the analytical methods used to determine pressure and temperature limits.

The proposed changes to the PTLR as evaluated in CCN ECP-16-000510-CN-001 0800297.301-01.00 do not require a change to the Technical Specification or Facility Operating License as the changes were made consistent with the Tech Spec requirements.

II. List the documents (e.g., UFSAR, Technical Specifications, other licensing basis, technical, commitments, etc.) reviewed, including sections numbers where relevant information was found (if not identified in the response to each question).

UFSAR (Ul-UFSAR)

Section V.C.4.0 - Material Radiation Exposure Section X - A. REACTOR SHUTDOWN COOLING SYSTEM Section X - H. SPENT FUEL STORAGE POOL FILTERING AND COOLING SYSTEM UFSAR Appendix C - License Renewal NMPl Technical Specifications 3.2.7 Reactor Coolant Systein Isolation Valves 4.2.7 Reactor Coolant System Isolation Valves 3.2.1 Reactor Vessel Heat-up and Cooldown 3.2.2 Minimum Reactor Vessel Temperature for Pressurization 6.6.7 RCS Pressure and Temperature Limits Report (PTLR)

LS-AA-104-1003 Revision 4 Page 5 of5 50.59 Screening No. 5059-2017-120 Rev. No. 00.00 Activity/Document Number: ECP-16-0005 I 0 Revision Number: 00.00

Title:

Revise NMP 1 Design Documents Impacted by Reload 24 FCP/ECP Ill. Select the appropriate conditions:

[8l If all questions are answered NO, then a 50.59 Evaluation is not required.

D If question 1, 2, 3, or 4 is answered YES for any portion of an Activity and question 5 is answered NO, then a 50.59 Evaluation shall be performed for the affected portion of the Activity.

D H question 5 is answered YES for any portion of an Activity and questions 1 through 4 are answered NO for the remaining portions of the Activity, then a License Amendment is required prior to implementation of the portion of the Activity that requires the amendment; however, a 50.59 Evaluation is not required for the remaining portions of the Activity.

D If question 5 is answered YES for any portion of an Activity and question I, 2, 3, or 4 is answered YES for any of the remaining portions of the Activity, then a License Amendment is required prior to implementation of the portion of the Activity that requires the amendment and a 50.59 Evaluation is required for the emaining affected portions of the Activity.

IV. Screening Signoffs: ~tv.-

50.59 Screener: Rebecca Gazda (Offload Times)/R. Corieri (PTLR) Sign* ,_ _,_,__ _~-- Date: ;}Jit/ 12°r7 (Print name) 50.59 Reviewer: ""G'-'-._, _In'""c,, _h,____ _ _ _ _ _ _ _ _ __ Date:'L_/'/(2°17 (Print name)

See LS-AA-104, Seetion 5, Documentation, for record retention requirements for this and all other 50.59 forms associated with the Activity.

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