ML063050122

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Request for Additional Information Regarding Amendment Application for Arts/Meod Modifications
ML063050122
Person / Time
Site: FitzPatrick Constellation icon.png
Issue date: 11/07/2006
From: Boska J
NRC/NRR/ADRO/DORL/LPLI-1
To: Kansler M
Entergy Nuclear Operations
Boska J, NRR, 301-415-2901
References
TAC MC9681
Download: ML063050122 (10)


Text

November 7, 2006Mr. Michael R. KanslerPresident Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601

SUBJECT:

JAMES A. FITZPATRICK NUCLEAR POWER PLANT - REQUEST FORADDITIONAL INFORMATION REGARDING AMENDMENT APPLICATION FOR ARTS/MEOD MODIFICATIONS (TAC NO. MC9681)

Dear Mr. Kansler:

On January 26, 2006, Entergy Nuclear Operations, Inc. (Entergy), submitted an application fora proposed amendment for the James A. FitzPatrick Nuclear Power Plant which would modify Technical Specification (TS) requirements to support the implementation of Average Power Range Monitor, Rod Block Monitor, TSs/Maximum Extended Operating Domain (ARTS/MEOD) analyses.The Nuclear Regulatory Commission staff is reviewing the submittal and has determined thatadditional information is needed to complete its review. The specific questions are found in the enclosed request for additional information (RAI). During a telephone call on October 25, 2006, the Entergy staff indicated that a response to the RAI would be provided within 45 days. Please contact me at (301) 415-2901 if you have any questions on this issue.Sincerely,/RA/John P. Boska, Senior Project ManagerPlant Licensing Branch I-1 Division of Operating Reactor Licensing Office of Nuclear Reactor RegulationDocket No. 50-333

Enclosure:

RAIcc w/encl: See next page

ML063050122OFFICELPL1-1/PMLPL1-1/LASBWB/BCLPL1-1/BCNAMEJBoskaSLittleGCranstonRLauferDATE11/01/0611/06/0611/06/0611/07/06 FitzPatrick Nuclear Power Plant cc:

Mr. Gary J. TaylorChief Executive Officer Entergy Operations, Inc.

1340 Echelon Parkway Jackson, MS 39213Mr. John T. HerronSr. VP and Chief Operating Officer Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Mr. Peter T. DietrichSite Vice President Entergy Nuclear Operations, Inc.

James A. FitzPatrick Nuclear Power PlantP.O. Box 110 Lycoming, NY 13093Mr. Kevin J. MulliganGeneral Manager, Plant Operations Entergy Nuclear Operations, Inc.

James A. FitzPatrick Nuclear Power PlantP.O. Box 110 Lycoming, NY 13093Mr. Oscar LimpiasVice President Engineering Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Mr. Christopher SchwarzVice President, Operations Support Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Mr. John F. McCannDirector, Licensing Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Ms. Charlene D. FaisonManager, Licensing Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Mr. Michael J. ColombDirector of Oversight Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Mr. David WallaceDirector, Nuclear Safety Assurance Entergy Nuclear Operations, Inc.

James A. FitzPatrick Nuclear Power Plant P.O. Box 110 Lycoming, NY 13093Mr. James CostedioManager, Regulatory Compliance Entergy Nuclear Operations, Inc.

James A. FitzPatrick Nuclear Power Plant P.O. Box 110 Lycoming, NY 13093Assistant General CounselEntergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601Regional Administrator, Region IU.S. Nuclear Regulatory Commission

475 Allendale Road King of Prussia, PA 19406Resident Inspector's OfficeJames A. FitzPatrick Nuclear Power Plant U. S. Nuclear Regulatory Commission P.O. Box 136 Lycoming, NY 13093 FitzPatrick Nuclear Power Plant cc:

Mr. Charles Donaldson, EsquireAssistant Attorney General New York Department of Law 120 Broadway New York, NY 10271Mr. Peter R. Smith, PresidentNew York State Energy, Research, and Development Authority 17 Columbia Circle Albany, NY 12203-6399Mr. Paul EddyNew York State Dept. of Public Service 3 Empire State Plaza Albany, NY 12223-1350Oswego County Administrator Mr. Steven Lyman 46 East Bridge Street Oswego, NY 13126SupervisorTown of Scriba Route 8, Box 382 Oswego, NY 13126Mr. James H. SniezekBWR SRC Consultant 5486 Nithsdale Drive Salisbury, MD 21801-2490Mr. Michael D. LysterBWR SRC Consultant 5931 Barclay Lane Naples, FL 34110-7306Mr. Garrett D. Edwards814 Waverly Road Kennett Square, PA 19348 EnclosureREQUEST FOR ADDITIONAL INFORMATIONREGARDING AMENDMENT APPLICATION FOR ARTS/MEOD MODIFICATIONS ENTERGY NUCLEAR OPERATIONS, INC.JAMES A. FITZPATRICK NUCLEAR POWER PLANTDOCKET NO. 50-333On January 26, 2006, Entergy Nuclear Operations, Inc. (Entergy), submitted an application fora proposed amendment for the James A. FitzPatrick Nuclear Power Plant which would modify Technical Specification (TS) requirements to support the implementation of Average Power Range Monitor (APRM), Rod Block Monitor (RBM), TSs/Maximum Extended Operating Domain (ARTS/MEOD) analyses. The Nuclear Regulatory Commission (NRC) staff is reviewing the submittal and has the following questions:Section 1.0 Introduction1-1Allowable value (AV) and analytical limit (AL) are used in a few places in attachment 5 tothe application. For example, on page 1-5, the first paragraph states "In the low flow stability region, the scram AVs are based on the scram ALs given in terms of core flow using the JAF

[James A. FitzPatrick] core flow to drive flow relationship...". Provide a clear definition of AV and AL as used in the above statement. What is the difference between AV and AL and how they are related?1-2 The two tables given on page 1-5 provide the scram and rod block AVs for single-loopoperation. Provide the basis for the flow-biased scram and rod block setpoints. How were the specific slopes derived or established?1-3Pages 1-4 and 1-5 show the two-loop operation (TLO) and single-loop operation (SLO) AVs for ranges of drive flow. Explain if the plant can operate at SLO condition at different pump speeds? If not, explain the reasons for the range of flow-biased SLO rod block and scram lines. Are these flow-biased scram lines (which differ from the TLO scram lines) intended to initiate a scram if a transient occurs while the plant is operating at SLO condition? If yes, state what analyses are supporting operation at lower pump speeds for SLO (single pump at maximum capacity).1-4 During SLO what is the corresponding percent power and percent flow for maximumextended load line limit analysis (MELLLA) operation?Section 3 Fuel Thermal Limits3-1The last paragraph on Page 1-5 discussed RBM setpoint relaxation and that the RBM isnot credited in the rod withdrawal error (RWE) for the reload analysis. Did Entergy perform RWE analyses to determine that a thermal limits penalty will not be necessary? 3-2In Table 3-5, page 3-14, notes b, c, and d in the table were misplaced. Please correctthis.3-3On Page 3-1, the first paragraph has the statement "The minimum core flow at 100% ofrated thermal power (RTP) used in the analysis presented in this section is 81% of RCF [rated core flow ]." Why not use the exact point at 79.8% of RCF corresponding to Figure 1-1 in the analysis?3-4At the top of Page 3.2, it states "The other two events (IRLS [idle recirculation loop start-up] and FRFI [fast recirculation flow increase]) are by design most limiting at off-rated conditions. Even when originated from their most limiting off-rated condition, the IRLS and FRFI are less limiting than the fast pressurization events (TTNBP [turbine trip with no bypass],

LRNBP [load rejection with no bypass], or FWCF [feedwater controller failure]) at rated power conditions. Thus, the IRLS and FRFI events were not considered in the determination of the off-rated limits." (a)Provide additional information (for example, plant response) to support the abovestatements. Explain why those two events were not analyzed in MELLLA operation domain.(b)In addition, the table on Page 3-3 (lower left corner) states "The LFWH [loss offeedwater heating], FLE [fuel loading error], IRLS, and FRFI events are not limiting at off-rated conditions." This statement is not consistent with the above statement. Please provide clarification.3-5In Table 3-2, the table and footnote showed peak transient response values whichoccurred at end of cycle (EOC). Confirm if this analysis was performed at other exposures such as beginning of cycle (BOC) and middle of cycle (MOC). 3-6Section 3.2 has a table for analytical assumptions. Please document that the JAF TSminimum number of SRVs and Turbines Out of Service is consistent with the analyses assumptions.3-7Section 3.3.6 stated that "Only adjustment of the P < PBypass portion of the MCPR(P)[minimum critical power ratio, power dependent] curve is required because, at P PBypass, theK(P) applies the rated power OLMCPR [operating limit MCPR] adjustment to the MCPR(P)." Please reference the appropriate NRC-approved amendment to the General Electric StandardApplication for Reactor Fuel or other topical report that explains this off-rated calculation methodology.This section also provided an equation for the adjustment as follows when operating in SLO:

SLO OLMCPR = OLMCPR dual-loop + SLMCPR [safety limit MCPR] SLO - SLMCPR dual-loop.Provide additional information on this approach (e.g., how was the above equation obtained?)and references. Section 4 Reactor Recirculation (RR) System4-1Section 4.0 on the RR System has the following statements:"The effects of aging and degradation mechanisms (e.g., jet pump crudding) were not includedin the evaluation.""The results of the evaluation indicate that the capability of the [recirculation] system to supportoperation at 105% of RCF may be marginal during some of the fuel cycle. If so, full 105% core flow may not be available until the end of the fuel cycle when the core differential pressure decreases, which causes the jet pump flow to increase for a given [recirculation] pump flow.

Rotating equipment limitations are economic in nature and do not affect plant safety."a) Is the recirculation system operating at its nameplate rating in capacity? Explain how plantmeasured flow data compared to the previous reload analysis in terms of the measured core flow versus assumed AV. b) What is the potential impact of not accounting for "jet pump crudding," in the safetyanalyses? Explain why the analyses results are valid if the impact of aging and degradation of the system (such as jet pump crudding) are not accounted for. c) Discuss what impact jet pump crudding may have on SLO flow calculations.

Section 7 Instability7-1Figure 7-1 shows the scram AV and rod block AV lines, which do not appear to bestraight linear scram lines as expected from the equations. Specifically, the scram and rod block lines within the stability exclusion appear to be curved lines. Explain why.

7-2Designate the SLO operating state point in the power/flow map and identify the corresponding scram and rod block lines. Show the flow biased SLO scram and rod block setpoints on Figure 7-1.7-3Describe how you obtain core mass flow rates, Wc, for SLO. Specifically, consideringthe reverse flow in the inoperable loop, explain how the accuracy of the Wc values is determined. 7-4On page 7-2, it states "For JAF Cycle 16, the core average power-to-flow ratio isestimated to be 56.8 MWt/Mlbm/hr [megawatts thermal per million pounds mass per hour] and the generic DIVOM [delta critical power ratio over initial MCPR versus the oscillation magnitude]

slope is valid for Cycle 16 operation." Explain what core flow state point was used in determining the 56.8 Mwt/Mlbm/hr value? Was this value calculated based on the rated thermal power at 75% core flow? If not, state why the minimum core flow state point is not an appropriate value. 7-5In the middle of page 7-2, a new APRM flow-biased flux scram line for ARTS/MEODoperation was determined with the additional conservatism in the evaluation. The additional conservatism was listed in numerical order 1, 2, and 3. Please explain why these assumptions were considered as conservative and how those numbers used in the assumptions wereobtained.Section 8 Loss-of-Coolant Accident (LOCA)8-1Please provide additional discussion on what kind of axial power profiles were assumedin the LOCA analysis.8-2 At the end of the fourth paragraph on page 8-1, it states "These results show thatoperation in the MELLLA region affects the nominal PCT [peak cladding temperature] by +3F and the Appendix K PCT by +93F." Please explain why the effects on the Appendix K PCT aremuch more severe than the nominal PCT.8-3 What were your upper bound PCT results?

8-4 On Page 8-4, there are the following notes for Table 8-2: "(a) The effect on the ECCS[emergency core cooling systems]-LOCA analysis PCT of operation in the MEOD domain for GE14 is conservatively applicable to GE12 and (b) The effect on the ECCS-LOCA analysis PCT for operation at core flows greater than 100% (ICF [increased core flow]) is negligible. Thus the PCTs for the limiting large break cases at rated conditions are applicable to the ICF condition."

Please provide justification for these notes. 8-5Please provide all state points including SLO and ICF for the calculation in Table 8-2.8-6 On page 8-2, there is a statement "The current JAF Licensing Basis PCT for GE12 fuelis 1370F with a 170F adder for 10 CFR 50.46 reported errors applicable to the JAFECCS-LOCA analysis". Was the adder limited to 10 CFR 50.46 GE12 fuel or are additional adders applicable to theGE14 fuel? In addition, a "170F" PCT adder is a significant number. Justify why JAF did notperform LOCA reanalysis for the GE12 fuel.8-7 Did JAF perform full spectrum ECCS-LOCA analysis? If not, please justify.

Section 11 Anticipated Transient Without Scram (ATWS)GE topical Table 11-2 shows the Peak Vessel Bottom Pressure for ATWS analysis at 1493psig, which provides very little margin to the ATWS overpressure protection criterion of 1500 psig. The following questions pertain to the key assumptions, conservatism and valve tolerances assumed in the ATWS analysis.11-1Table 11-1 shows that the analysis assumed two of the safety-relief valves (SRVs) withthe lowest pressure setpoints were assumed to be out of service (OOS). This is conservative.

However, explain why two SRVs OOS was assumed in the analysis? Are there specific known reasons (e.g., tolerances outside TS values) that may lead to declaring SRVs OOS frequently? 11-2To demonstrate the SRV performance at FitzPatrick, provide the "as found" SRVtolerances data. If the SRV tolerances are outside the TS value, justify why the tolerances assumed in the safety analyses should not be increased. 11-3The application stated: "The MEOD analysis assumed that the SRVs opened at theupper Analytical Limit of the SRV Electric Lift Subsystem [(SRVELS)], and that the two lowest set SRVs were OOS-" The following questions address crediting the SRVELS in the safety analyses.11-3.1Table 11-1 specifies the initial conditions assumed in the ATWS analyses and showsthat the SRVELS was credited. However, the Updated Final Safety Analysis Report (UFSAR) 4.4.5 (4th paragraph, last sentence) states that "SRVELS is not credited in any accident analysis." Since the SRV electric lift system is not a TS specified safety-grade system, justify why it is acceptable to take credit for it. Most importantly, state why credit for the SRVELS is necessary at FitzPatrick?11-3.2Table 11-1 shows SRVELS opening analytical limits at the UFSAR setpoint values of+1.5%. Justify the basis for not using TS +3% tolerance value. 11-4Document the reasons why main steam isolation valve (MSIV) and pressure regulatorfailed open (PRFO) are the most limiting ATWS transients.11-5Table 11-2 shows a peak vessel bottom pressure for ATWS analysis of 1493 psig at31.4 seconds. Since the ATWS peak pressure margin is low, state what conservatisms were assumed in the plant-specific inputs and ATWS analysis methods that will provide some confidence that the small margin is acceptable.11-6 Confirm standby liquid control system (SLCS) success by providing the following eventsequence information, preferably in tabular format:a) Time of SLCS initiationb) Reactor pressure vessel (RPV) bottom head pressure at time of SLCS initiation c) RPV bottom head pressure at time of SLCS injection (SLCS initiation plus 30 sec SLCS liquid transport time - from Table 11-1) d) SLC pump discharge relief valve setpoint e) Delta psig SLCS pump margin available at time of SLCS initiation f) Time hot shutdown is achieved.Instrumentation Questions1.Attachment 5 of the January 26, 2006, submittal is the General Electric TechnicalReport NEDC-33087P, Revision 1, dated September 2005. This report, on pages 1-4 and 1-5, lists the AV for the Flow-Biased APRM neutron flux high trip setting as:Two Loop Operation:0.38

  • Wd + 61.0% for0% < Wd 24.7%1.15
  • Wd + 42.0% for24.7% < Wd 47.0%0.63
  • Wd + 73.7% for47.0% < Wd 68.7%With a maximum of 117.0% power for Wd > 68.7% Single Loop Operation:0.38
  • Wd + 57.9% for0% < Wd 32.7%1.15
  • Wd + 32.8% for32.7% < Wd 50.1%0.58
  • Wd + 61.3% for50.1% < Wd 95.9%With a maximum of 117.0% power for Wd > 95.9%By letter dated December 22, 2005, Entergy submitted Revisions 19 and 20 (cycle 17 update)to the Core Operating Limits Report which also listed the same equation. However, these equations are listed as trip settings. Based on this, the NRC staff is unable to determine whether these values have been calculated as AVs or trip settings. As a result, it is not clear as to the setpoint methodology used or how the instrument uncertainties have been addressed.

Therefore, in order for the staff to determine the adequacy of the setpoint determination, please provide the setpoint methodology and calculation performed to determine the trip setpoint and limiting safety system setting. Also provide the information on how the operability of these instruments are determined during the surveillance tests required by the TSs.2.On the bottom of page 5 of Attachment 1 to the December 22, 2005, application, itstates that the physical changes to the plant to accommodate the expanded operating region include Flow Control Trip Reference cards. GE Report NEDC- 33087 references GE licensing topical report NEDC -32339P-A, Supplement 2, Revision 1. The staff's acceptance of NEDC - 32339P - A is based on certain design and installation criteria. Please provide the information to show that FitzPatrick meets those criteria. If these criteria are not met then justify the acceptability of these cards to establish the expanded operating region.