LR-N10-0239, 0000-0119-1728, Revision 0, Hope Creek Cycle 17 Stability Results for GE14i Support, Attachment 1

0000-0119-1728, Revision 0, Hope Creek Cycle 17 Stability Results for GE14i Support, Attachment 1

ML101820087
Person / Time
Site:	Hope Creek
Issue date:	06/30/2010
From:	Yaguang Yang GE-Hitachi Nuclear Energy Americas
To:	Office of Nuclear Reactor Regulation
References
LR-N10-0239 0000-0119-1728, Rev 0, DRF 0000-0108-5386, Rev 0
Download: ML101820087 (10)

Text

LR-N 10-0239 Attachment 1 GEH Report 0000-0119-1728-RO Hope Creek Cycle 17 Stability Results for GE14i Support

U ,HITACHI GE Hitachi Nuclear Energy P.O. Box 780 3901 Castle Hayne Rd Wilmington, NC 28401 0000-0119-1728-RO DRF 0000-0108-5386 Revision 0 Class I June 2010 Hope Creek Cycle 17.

Stability Results for GE14i Support Principal Contributor Yingzhen Yang Principal Verifier Necdet Kurul Approving Manager Juswald Vedovi

HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE14i IMPORTANT NOTICE REGARDING THE CONTENTS OF THIS REPORT Please Read Carefully A. Disclaimer The only undertakings of GE Hitachi Nuclear Energy (GEH) respecting information in this document are contained in the contract between the company receiving this document and GEH. Nothing contained in this document shall be construed as changing the applicable contract. The use of this information by anyone other than a customer authorized by GEH to have this document, or for any purpose other than that for which it is intended, is not authorized. With respect to any unauthorized use, GEH makes no representation or warranty, and assumes no liability as to the completeness, accuracy or usefulness of the information contained in this document, or that its use may not infringe privately owned rights.

HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE I4i TABLE OF CONTENTS Section Paqe

15. Stability A nalysis Results ........................................................................................ I Appendix A Calculated BSP Region End Points ...................................................................... 6 ii

HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE 14i

15. Stability Analysis Results 15.1 Stability Option III Solution Hope Creek has implemented BWROG Long Term Stability Solution Option III using the Oscillation Power Range Monitor (OPRM) as described in Reference 1 in Section 15.4. The plant specific Hot Channel Oscillation Magnitude (HCOM) (Reference 2 in Section 15.4) and other cycle specific stability parameters are used in the Cycle 17 Option III stability evaluation. Backup Stability Protection (BSP) regions are used by the plant in the event that the Option III OPRM system is declared inoperable.

The following Option III OPRM stability setpoint determination described in Section 15.2 and the implementation of the associated BSP Regions described in Section 15.3 provide the stability licensing bases for Hope Creek Cycle 17.

15.2 Detect and Suppress. Evaluation A reload Option III evaluation has been performed in accordance with the licensing methodology described in Reference 3 in Section 15.4. The stability based OLMCPR is determined for two conditions as a function of OPRM amplitude setpoint. The two conditions evaluated are: (1) a postulated oscillation at 45% rated core flow quasi steady-state operation (SS), and (2) a postulated oscillation following a two recirculation pump trip (2PT) from the limiting rated power operation state point.

The OPRM-setpoint-dependent OLMCPR(SS) and OLMCPR(2PT) values are calculated for Cycle 17 in accordance with the BWROG regional mode DIVOM guidelines described in Reference 4 in Section 15.4. The Cycle 17 Option III evaluation provides adequate protection against violation of the SLMCPR for the two postulated reactor instability events as long as the plant OLMCPR is equal to or greater than OLMCPR(SS) and OLMCPR(2PT) for the selected OPRM setpoint in Table 15-2.

The relationship between the OPRM Successive Confirmation Count Setpoint and the OPRM Amplitude Setpoint is provided in Reference 3 in Section 15.4 and Table 15-1. For intermediate OPRM Amplitude Setpoints, the corresponding OPRM Successive Confirmation Count Setpoints have been obtained by using linear interpolation.

The OPRM setpoints for TLO are conservative relative to SLO and are, therefore, bounding.

The 0.01 OLMCPR adder for void fraction uncertainty required by IMLTR Limitation 19 in Reference 6 of Section 15.4 has been addressed in Table 15-2 to prevent a setpoint credit as described by MFN 08-693. Therefore, Table 15-2 is compatible with the OLMCPRs provided in the Section 11 OLMCPR summary tables.

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HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE I4i Table 15-1 Relationship between OPRM Successive Confirmation Count Setpoint and OPRM Amplitude Setpoint Successive OPRM Confirmation Amplitude Count Setpoint Setpoint 6 Ž1.04 8 Ž1.05 9 Ž1.06 10 Ž1.07 11 Ž1.08 12 Ž1.09 13 ~1.10 14 Ž1.11 15 Ž1.13 16 >1.14 17 Ž1.16 18 >1.18 19 >1.21 20 Ž1.24 2

HOPE CREEK GENERATING STATION 0000-0119-1728-RO Stability Information Supporting GE14i Table 15-2 OPRM Setpoint Versus OLMCPR' OPRM Amplitude OLMCPR(SS) OLMCPR(2PT)

Setpoint 1.05 1.281 1.235 1.06 1.307 1.261 1.07 1.337 1.290 1.08 1.369 1.321 1.09 1.394 1.345 1.10 1.410 1.360 1.11 1.427 1.376 1.12 1.444 1.393 1.13 1.461 1.410 1.14 1.479 1.427 OLMCPR Off-rated Rated Power Acceptance OLMCPR OLMCPR (see Criteria @45% flow Section 11) 15.3 Backup Stability Protection The BSP region boundaries were calculated for Hope Creek Cycle 17 for normal feedwater temperature operation. The endpoints of the regions are defined in Table 15-3. The region boundaries, shown in Figure 2, are defined using the Generic Shape Function (GSF). See Reference 5 in Section 15.4.

I The OLMCPR values presented in the OPRM Setpoint Versus OLMCPR table have been adjusted to include a 0.01 adder in accordance with extended operating domain licensing commitments.

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HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE14i Table 15-3 BSP Region Intercepts for Normal Feedwater Temperature Power Flow Core Highest Region Boundary Intercept (%) (%) DR DR Al 58.2 40.0 < 0.799 < 0.437 BI 44.7 35.0 < 0.798 < 0.447 A2 66.4 50.0 < 0.799 < 0.404 B2 32.2 36.3 < 0.790 < 0.391 Appendix A contains the calculated BSP region end points and decay ratios for Nominal Feedwater Temperature.

The OPRM Trip-Enabled Region for Nominal Feedwater Temperature is confirmedto be less than or equal to 60% rated core flow and greater than or equal to 26.1% rated power.

15.4 References

1. B WR Owners' Group Long-term Stability Solutions Licensing Methodology, NEDO-331960-A, November 1995 (including Supplement 1).

2. Reactor Long-Term Stability Solution Option III: Licensing Basis Hot Channel Oscillation Magnitudefor Hope Creek, GENE-A13-00381-04, RI, September 2004.

3. Reactor Stability Detect and Suppress Solutions Licensing Basis Methodology for Reload Applications, Licensing Topical Report, NEDO-32465-A, August 1996.

4. Plant-Specific Regional Mode DIVOM Procedure Guideline, GE-NE-0000-0028-9714-R1, June 2005.

5. Backup Stability Protection (BSP)for Inoperable Option III Solution, OG-02-0119-260, July 2002.

6. Final Safety Evaluation by the Office of Nuclear Reactor Regulation, Licensing Topical Report NEDC-33173P,Applicability of GE Methods to Expanded OperatingDomains, July 2009.

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HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GEI4i 110.00 e Natural Circulation Line ain ,

t 6-Extended Operating Dorr 100.00 T x BSP Scram Region F Boun dary

- -- +-- BSP Controlled Entry yReg ion Boundary 90.00 80.00 S-- -

L q

T - - - -

70.00 60.00 IB 0

Ii .. . .. __ .___ B;_

a-50.00 . - -.--- - ---

E I-0) 40.00 30.00 20.00 10.00 0.00 0 10 40 50 60 70 80 90 100 110 120 Core Flow (%)

Figure 2 BSP Region Boundaries for Normal Feedwater Temperature Operation 5

HOPE CREEK GENERATING STATION 0000-01 19-1728-RO Stability Information Supporting GE I4i Appendix A Calculated BSP Region End Points The BSP region end points reported in Section 15 represent the proposed BSP region. The proposed BSP region is conservative and bounds the calculated BSP region end points.

To support the initial introduction of GEI4i Isotope Test Assemblies (ITAs), this appendix provides the calculated BSP region end points and decay ratios. These calculated power/flow points and decay ratios represent typical calculations for Hope Creek. The plant- and cycle-specific calculations provide reasonable assurance that the thermal hydraulic stability as prescribed by Option III with respect to the size of the BSP regions is maintained with ITAs in the Hope Creek core.

Table A-1 BSP Region Calculated Intercepts for Normal Feedwater Temperature Region Boundary Power Flow Core Cighaes Intercept (%) (%) DR DR Al 58.1 39.9 0.799 0.437 BI 47.7 34.6 0.798 0.447 A2 66.1 49.7 0.799 0.404 B2 39.2 35.7 0.790 0.391 6