Proposed Steam Generator Examination Program - 2002 Refueling Outage (2R15)ML022390064 |
Person / Time |
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Site: |
Indian Point |
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Issue date: |
08/21/2002 |
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From: |
Dacimo F Entergy Nuclear Northeast, Entergy Nuclear Operations |
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To: |
Document Control Desk, Office of Nuclear Reactor Regulation |
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References |
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CAW-02-1544, NL-02-112, RG-01-121, TAC MB0770, TS 4.13.C.1 NEI 97-06, TR-109569-V1R5, Rev 5, WCAP-15902-NP, Rev 0, WCAP-15902-P Rev 0 |
Download: ML022390064 (14) |
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Category:Letter type:NL
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[Table view] Category:Manual
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Noggle of USNRC to J. Kottan of USNRC and T. Rice of Department of Environmental Conservation, Regarding Gwmp Plan and Procedure ML0704002432006-11-0707 November 2006 E-Mail from J. Adler of Entergy to J. Noggle of USNRC, Regarding Gwmp Plan and Procedure ML0617801832006-06-15015 June 2006 Technical Specification Update for Unit 3 NL-06-056, Offsite Dose Calculation Manual (ODCM)2006-05-15015 May 2006 Offsite Dose Calculation Manual (ODCM) ML0620003692006-04-19019 April 2006 Update to IP3 Technical Specifications Bases ML0631905242006-04-19019 April 2006 Technical Specification Bases Manual, IP-SMM-AD-103 ML0706801542006-02-13013 February 2006 (2) ENN-NDE-10.01, Rev. 2; VT-1 Examination, 02/13/2006 ML0706801572006-02-0202 February 2006 (3) ENN-NDE-10.03, Rev. 1; VT-3 Examination, 02/02/2006 ML0613201192006-01-19019 January 2006 E-mail from D. Croulet of Entergy to J. Noggle of USNRC, Regarding NRC Visitors January 301 Through February 3rd ML0532004452005-10-28028 October 2005 Technical Specification Bases Changes ML0527705332005-08-19019 August 2005 Offsite Dose Calculation Manual, Rev. 9 ML0524102942005-08-17017 August 2005 Update for IP3 Technical Requirements Manual ML0516700722005-06-0303 June 2005 IP-SNM-AD-104, Rev 0, Site Management Manual Controlled Document Transmittal Form - Procedures. CNRO-2005-00024, Entergy Quality Assurance Program Manual, Revision 122005-04-0606 April 2005 Entergy Quality Assurance Program Manual, Revision 12 ML0510201362005-03-31031 March 2005 Update for IP3 Technical Requirements Manual ML0503303642005-01-19019 January 2005 Transmittal of Indian Point, Unit 3 Technical Specifications Bases ML0435703832004-12-15015 December 2004 Enclosure B to NL-04-156, Engineering Standards Manual IES-3B, Rev 0, Instrument Loop Accuracy and Setpoint Calculation Methodology (P3) ML0431504202004-10-23023 October 2004 Technical Specification Bases ML0426601612004-09-10010 September 2004 IPEC Site Management Manual, Revision 0 to IP-SMM-AD-103 2024-04-23
[Table view] Category:Topical Report
MONTHYEARML0505502212005-02-11011 February 2005 Updated Errata Pages for WCAP-16212-NP ML0423902142004-08-20020 August 2004 Westinghouse Owners Group Request to Withdraw WCAP-16168-NP, Risk-Informed Extension of Reactor Vessel In-Service Inspection Interval, (PA-MSC-0120) ML0422604992004-08-0303 August 2004 Errata Pages for WCAP-16157-NP, Indian Point Nuclear Generating, Unit 2, Stretch Power Uprate NSSS and BOP Licensing Report. NL-04-092, Capsule X Material Surveillance Report2004-07-29029 July 2004 Capsule X Material Surveillance Report ML0332302252003-11-12012 November 2003 Submittal of WCAP-16084-NP, Development of Risk-Informed Safety Analysis Approach and Pilot Application. ML0315705082003-05-0707 May 2003 WCAP-14936, Code Qualification Document for Best Estimate Small Break LOCA Analysis, Revision 0, August 2001 and WCAP-14936-NP, Revision 0, April 2003, Abstract Through Section 35 ML0315705012003-05-0707 May 2003 WCAP-14936, Code Qualification Document for Best Estimate Small Break LOCA Analysis, Revision 0, August 2001 and WCAP-14936-NP, Revision 0, April 2003, Sections 9 Through 23 ML0315702742003-05-0707 May 2003 WCAP-14936, Code Qualification Document for Best Estimate Small Break LOCA Analysis, Revision 0, August 2001 and WCAP-14936-NP, Revision 0, April 2003, Table of Contents Through Figure 8-34 ML0226001222002-09-30030 September 2002 WCAP-15940, Power Calorimetric Uncertainty for 1.4-Percent Uprating for Indian Point, Unit No. 3. ML0223900822002-08-31031 August 2002 to WCAP-15909-NP, Regulatory Guide 1.121 Analysis for Indian Point Unit 2 Replacement Steam Generators. NL-02-112, Proposed Steam Generator Examination Program - 2002 Refueling Outage (2R15)2002-08-21021 August 2002 Proposed Steam Generator Examination Program - 2002 Refueling Outage (2R15) NL-02-082, License Amendment Request (LAR No. 02-010) - Regarding Indian Point Energy Center, Unit No. 2 Technical Specifications Requirements for Control Rod Misalignment & Rod Position Indication2002-07-0909 July 2002 License Amendment Request (LAR No. 02-010) - Regarding Indian Point Energy Center, Unit No. 2 Technical Specifications Requirements for Control Rod Misalignment & Rod Position Indication ML0732705072002-06-30030 June 2002 WCAP-12655, Rev. 2, Emergency Diesel Generator Loading Study, Indiain Point Unit 2. 2005-02-11
[Table view] |
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AE SEnterg Entergy Nuclear Northeast Entergy Nuclear Operations, Inc Indian Point Energy Center 295 Broadway, Suite 1 PO Box 249 Buchanan, NY 10511-0249 August 21, 2002 Re: Indian Point Unit No. 2 Docket No. 50-247 NL-02-112 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station O-P1-17 Washington, DC 20555-0001
Subject:
Proposed Steam Generator Examination Program - 2002 Refueling Outage (2R15)
Reference:
- 1) Entergy letter to NRC, "Response to Request for Additional Information Regarding Steam Generator Surveillance Requirements, Indian Point Nuclear Generating Unit 2 (TAC No. MB0770)," dated November 5, 2001
- 2) Entergy letter to NRC, "Steam Generator Inspection Commitment (TAC No.
MB0770)," dated December 7, 2001
- 3) NRC letter to Consolidated Edison, "Request for Additional Information Regarding Steam Generator Surveillance Requirements, Indian Point Nuclear Generating Unit No. 2 (TAC No. MB0770)," dated September 5, 2001 Pursuant to the requirements of Indian Point Unit 2 Technical Specification 4.13.C.1, Entergy Nuclear Operations, Inc. (ENO) hereby submits its proposed steam generator examination program (Attachment 1) to be conducted during the 2002 refueling outage (2R15). This examination program was developed in accordance with industry guidelines defined in Nuclear Energy Institute (NEI) 97-06: "Steam Generator Program Guidelines," Rev. 1, and Electric Power Research Institute (EPRI) Report TR-109569-V1R5: "PWR Steam Generator Examination Guidelines," Rev. 5.
By letter dated November 5, 2001 (Reference 1), ENO provided responses to the staff's request for additional information relative to a proposed amendment regarding revised steam generator primary to secondary leakage limits, and steam generator tube inservice surveillance requirements. By Reference 1, ENO committed to include with its steam generator examination plan submitted in accordance with Technical Specification 4.13.C.1, the plugging criteria, and a description of the methodology used for its development. Subsequently, in a telephone call on November 28, 2001, the NRC further requested that the subject submittal include certain specific 1\Apv~J-items. Reference 2 summarized the specific items to be addressed.
NL-02-112 Page 2 of 4 ENO contracted Westinghouse Electric Corporation to perform a Regulatory Guide 1.121 analysis to determine steam generator tube structural limits. The results from this analysis are provided in WCAP-15909-P, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators," dated August 2002 (Proprietary). The structural analysis addresses all anticipated degradation forms except circumferential cracking. With the exception of the locked tube/support plate condition, various tube loading scenarios were evaluated. The locked tube/support plate condition is not expected to develop at IP-2 due to the new steam generator's broached stainless steel support plates. The structural limits established by the analysis substantiate the tube acceptance criteria identified in the Technical Specifications. Based upon the completion of this analysis, ENO is providing a supplemental response (Attachment 2) to Request No. 1 of the NRC's Request for Additional Information Regarding Steam Generator Surveillance Requirements dated September 5, 2001 (Reference 3).
Accordingly, ENO is enclosing the following additional items:
- 1. One (1) copy of WCAP-15909-P, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators," dated August 2002 (Proprietary).
- 2. One (1) copy of WCAP-15909-NP, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators," dated August 2002 (Non-Proprietary).
Also enclosed are a Westinghouse authorization letter dated August 6, 2002 (CAW-02-1544),
accompanying affidavit, Proprietary Information Notice, and Copyright Notice. As Item 1 contains information proprietary to Westinghouse Electric Corporation, it is accompanied by an affidavit signed by Westinghouse, the owner of the information. The affidavit sets forth the basis on which the information may be withheld from public disclosure by the NRC and addresses with specificity the considerations listed in paragraph (b)(4) of Section 2.790 of the Commission's regulations. Accordingly, it is respectfully requested that the information that is proprietary to Westinghouse be withheld from public disclosure in accordance with 10 CFR 2.790 of the Commission's regulations.
Correspondence with respect to the copyright on proprietary aspects of the items listed above or the supporting affidavit should reference CAW-02-1544 and should be addressed to H. A. Sepp, Regulatory and Licensing Engineering, Westinghouse Electric Corporation, P. 0. Box 355, Pittsburgh, Pennsylvania 15230-0355.
No new regulatory commitments are being made by ENO in this correspondence.
NL-02-112 Page 3 of 4 Should you or your staff have any questions regarding this matter, please contact Mr. John McCann, Manager, Licensing at (914) 734-5074.
Fred Dacimo Vice President - Operations Indian Point 2
Attachment:
- 1. Proposed Steam Generator Examination Program 2002 Refueling Outage
- 2. Supplemental Response to Request No. 1 for NRC Request for Additional Information Regarding Steam Generator Surveillance Requirements, Indian Point Unit No. 2 (TAC No. MBI0770), dated September 5, 2001.
- 3. WCAP-15909-P, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators," dated August 2002 (Proprietary).
- 4. WCAP-15909-NP, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators," dated August 2002 (Non-Proprietary).
- 5. Westinghouse letter dated August 6, 2002 (CAW-02-1544)
NL-02-112 Page 4 of 4 C: Mr. Hubert J. Miller (w/att)
Regional Administrator-Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Mr. Patrick D. Milano, Senior Project Manager, Section 1 (w/att 2 copies)
Project Directorate I Division of Licensing Project Management U.S. Nuclear Regulatory Commission Mail Stop O-8-2C Washington, DC 20555 Senior Resident Inspector (w/att)
U.S. Nuclear Regulatory Commission P.O. Box 38 Buchanan, NY 10511 Mayor, Village of Buchanan (w/att 1,2) 236 Tate Avenue Buchanan, NY 10511 Mr. Paul Eddy (w/ att 1,2)
NYS Department of Public Service 3 Empire Plaza Albany, NY 12223 Mr. William Flynn (w/ att 1,2)
NYS ERDA Corporate Plaza West 286 Washington Ave. Extension Albany, NY 12203
ATTACHMENT 1 TO NL-02-112 Proposed Steam Generator Examination Program 2002 Refueling Outage Entergy Nuclear Operations, Inc.
Indian Point Unit No. 2 Docket No. 50-247
NL-02-112 Attachment 1 Page 1 of 6 Indian Point 2 Proposed Steam Generator Examination Program 2002 Refueling Outage A comprehensive steam generator (SG) examination program has been developed for implementation at Indian Point 2 (IP-2) for the first inservice inspection of the replacement steam generators during the Fall 2002 refueling outage (2R15). The examination program and methods comply with the IP-2 Technical Specifications and IP-2 Station Administrative Order (SAO) 180: "Administrative Steam Generator Program Plan." The steam generator examination program was developed in accordance with industry guidelines defined by the Nuclear Energy Institute (NEI) 97-06: "Steam Generator Program Guidelines," Rev. 1, and Electric Power Research Institute (EPRI) Report TR-109569-V1R5: "PWR Steam Generator Examination Guidelines," Rev. 5.
The steam generator examination program incorporates both primary and secondary-side inspections. The scope of the inspections to be performed and the methods employed are detailed in Westinghouse Electric Nuclear Services Report No. SG-SGDA-02-029: "Steam Generator Degradation Assessment for Indian Point Unit 2 RFO 15," Rev. 0. (Reference 1). The degradation assessment defines an integrated plan for the detection, quantification and assessment of degradation of both primary and secondary side steam generator components that could affect structural integrity, pressure boundary leak tightness, and operating reliability.
The primary-side examination plan utilizes eddy current test (ECT) methods to detect and assess potential steam generator tube degradation, and visual inspection to assess the condition of the primary channel head, steam generator tube plugs, and tube-to-tubesheet seal welds. The secondary-side examination plan assesses steam generator internals, both in bundle and steam drum, and top of tubesheet regions. Visual examination is utilized to detect loose parts and to assess other secondary-side component conditions that could affect the structural integrity and leak tightness of pressure boundaries.
Elements of the primary and secondary-side inspections described herein address compliance with Technical Specifications, NEI 97-06, and industry guidelines. ENO's compliance with NEI 97-06 is mandated by SAO-180 Administrative Steam Generator Program Plan, which provides for management discretion to define the scope and frequency of certain steam generator examinations that go beyond the requirements of the Technical Specifications. To the extent that the steam generator examination plan for the Fall 2002 exceeds existing Technical Specification requirements, no new licensing commitments are intended or implied in this plan. Specific details of the 2002 refueling outage steam generator examination program are summarized below.
NL-02-112 Attachment 1 Page 2 of 6 Steam Generator Primary-Side Inspection Primary-side steam generator examinations are summarized in Table 1. One hundred percent (100%) of active steam generator tubes will be examined from tube end to tube end utilizing eddy current test (ECT) methods as specified in the Degradation Assessment (Ref. 1). A full length bobbin probe inspection will be performed of the tubes in Rows 3 and higher. In Rows 1 and 2, a bobbin probe inspection will be performed of the hot and cold straight leg sections inclusive of the upper support plate, while Ubends in these two rows will be inspected by rotating Plus Point probe. In addition 20% of hot leg tubes in four steam generators will be inspected at the top of the tubesheet +/- 3 inches by rotating Plus Point probe.
Potential and actual indications of degradation by the bobbin probe will be further characterized and confirmed by rotating Plus Point probe. Row 1 and Row 2 Ubends that exhibit unresolved rotating probe signals may also be inspected by high frequency Plus Point rotating probe. The basis used to determine the scope of any selected inspection sample or need to perform an expansion of the inspection scope shall comply with the requirements of the Technical Specification 4.13 and the EPRI PWR Steam Generator Examination Guidelines Rev. 5.
Discretionary ECT testing may include the use of high frequency rotating Plus Point probe in a random selection of Row 1 and 2 Ubends. Other inspection probes and methods may be used at the discretion of ENO. Supplementing steam generator tube ECT inspections, visual inspection will be performed of the primary channel heads and tubesheet, including steam generator tube to tubesheet seal welds and previously plugged tubes (two tubes in SG 24 were plugged at the factory during manufacturing), in accordance with the requirements of the Westinghouse SG Technical Manual and site procedures.
The ECT methods employed to inspect steam generator tubes meet the requirements of the EPRI PWR Steam Generator Examination Guidelines, Rev. 5, and are qualified in accordance with Appendix H. ECT data analysts will be qualified using a site specific training program in accordance with Appendix G of the same EPRI guideline document. Bobbin probe inspection will be performed of all straight leg tube sections and Ubends in Rows 3 and higher with the maximum diameter probe feasible, which is typically a 720 mil diameter probe. While there is no expectation that any significant tube diameter restriction will be encountered, a tube that does not permit passage of the 720 mil diameter probe will be tested through the region of the restriction with progressively smaller qualified probes as required down to a 610 mil diameter probe, and the cause of the restriction will be assessed. Unrestricted portions of the same tube will be tested with the largest practical diameter probe size from either hot and/or cold leg sides in accordance with EPRI Appendix H qualified procedures. The 610 mil bobbin probe will be used only for gauging. If the tube does not permit passage of the 610 mil bobbin probe it will be plugged. Any tube portion whose inspection is limited to use of the 610 mil bobbin probe, shall
NL-02-112 Attachment 1 Page 3 of 6 also be inspected by rotating Plus Point probe. Depending on the cause of the restriction, if this latter inspection data establishes that the tube is not defective, the tube will remain in service.
The results of ECT shall be reviewed, and degraded and defective steam generator tubes shall be identified. The cause of degradation and degradation measurement parameters in degraded steam generator tubes shall be assessed against established structural limits (Ref. 2) and Technical Specification criteria, and the result shall be incorporated in the Operational Assessment. If any defective tubes are detected, a bounding selection of defective tubes shall be pressure tested and the results shall be compared against performance criteria for structural integrity and accident leakage and incorporated into the Condition Monitoring Assessment. For tubes with existing degradation, the Operational Assessment shall suitably account for uncertainties in eddy current measurements and continued tube wall degradation between consecutive inspection periods.
Degraded tubes, as defined by TS 4.13.A.1.d, shall be considered acceptable for continued service only if the degradation meets the more restrictive of the requirements of TS 4.13.B.1 or the required industry standard (NEI 97-06) operational assessment for the next period that conservatively demonstrates continued structural integrity including consideration of ECT error and degradation growth. Tubes that contain degradation that exceeds the more limiting requirement shall be either repaired or removed from service by plugging. ENO may administratively plug tubes for other reasons. Prior to leaving a degraded tube in service, Entergy will submit to the NRC the bases of such decision including the method of inspection, the plugging criterion used, and a description of the methodology used to develop this criterion.
Steam Generator Secondary-Side Inspection The steam generator secondary-side examination plan assesses steam generator internals, both in bundle and steam drum, and top of tubesheet regions. Visual inspection is utilized to assess the presence of loose parts or other steam generator secondary-side component conditions that could affect the structural integrity of the primary boundary and leak tightness.
The secondary-side inspection will incorporate sludge lancing and foreign object search and retrieval (FOSAR). In-bundle inspection will be performed in approximately every fifth column.
The upper bundle inspection will be performed by both looking up from the bottom and also by removing the inspection ports located above the top support plate. This inspection will be performed on all four steam generators. On one steam generator, the secondary side manway will be removed to perform a visual inspection of upper parts of the steam generator. This inspection will include but not be limited to the "J" nozzles, the feedring, and risers. Discrepant and unusual conditions will be noted and dispositioned in accordance with ENO procedure.
NL-02-112 Attachment 1 Page 4 of 6
References:
- 1. Westinghouse Electric Nuclear Services Report No. SG-SGDA-02-029: "Steam Generator Degradation Assessment for Indian Point Unit 2 RFO15," Rev. 0
- 2. Westinghouse Electric Company Report WCAP-15909: "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators"
NL-02-112 Attachment 1 Page 5 of 6 Table 1: Steam Generator Primary Side Inspection Plan for 2R15 Inspection Inspection Scope Number of Steam Generators ECT Bobbin Coil 100% of tubes - end to end' Four steam generators ECT Rotating Probe (Plus Point) Row 1 and Row 2 U-bends Four steam generators ECT Rotating Probe (Plus Point) 20% of hot leg tubes at the top of tubesheet +/- 3 Four steam generators inches ECT Rotating Probe (Hi-Freq Plus Point) Sample Row 1 and Row 2 U-bends Two steam generators ECT Rotating Probe (Plus Point) Indications of degradation by Bobbin probe To be determined Visual Channel head, cladding, plugs, seal welds Four steam generators Notes:
- 1) Bobbin coil is not qualified for Row 1 and Row 2 U-bends.
NL-02-112 Attachment 1 Page 6 of 6 Table 2: Steam Generator Secondary Side Inspection Plan for 2R15 Task and Inspection Method Inspection Scope Number of Steam Generators Sludge lancing Top of tubesheet Four steam generators In-bundle FOSAR - visual Top of tubesheet and tube bundle Four steam generators Outer annulus visual Region between wrapper and outer shell Four steam generators Upper internals visual Steam drum, J-tubes, feed ring One steam generator Transition cone visual Girthweld region One steam generator Support plates visual Support plates One steam generator
ATTACHMENT 2 TO NL-02-112 Supplemental Response to Request No. 1 for NRC Request for Additional Information Regarding Steam Generator Surveillance Requirements, Indian Point Unit No. 2 (TAC No.
MB0770), dated September 5, 2001 Entergy Nuclear Operations, Inc.
Indian Point Unit No. 2 Docket No. 50-247
NL-02-112 Attachment 2 Page 1 of 1 Supplemental Response to Request for Additional Information Request No. 1 The Basis section of TS 4.13 states that steam generator tube burst and collapse tests have demonstrated that tubes having wall thickness of not less than 0.025 inch have adequate margins of safety. In the December 11 letter, the licensee did not indicate what guidelines, if any, were used to obtain these results. Provide a summary of the analysis, including the loads considered, tube support plate conditions (locked or unlocked), and a list of any guidelines (e.g., NRC Regulatory Guide 1.121, "Bases for Plugging Degraded PWR Steam Generator Tubes"), used to support the proposed minimum wall thickness and plugging criteria.
Response to Request No. 1 A Regulatory Guide 1.121 analysis has been performed to determine tube structural limits for Indian Point 2 steam generator tubing. A summary of this analysis is provided in WCAP-15909:
"Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators."
The analysis performed assumes uniform wall thinning in both axial and circumferential directions.
This assumption bounds both localized wall loss such as pitting corrosion and single axial throughwall or partial depth cracks. The structural limit criteria developed are not applicable to circumferential cracks. The analysis addresses regions of steam generator tubes corresponding to anti-vibration bar intersections, support plate intersections, and straight leg regions of the tube, including the tubesheet region. The worst case scenario calculated demonstrates that remaining tube wall thickness can be 0.024 inch, and still exhibit adequate margin of safety against steam generator tube burst or collapse. For small pits and wear scars, remaining wall thickness could be as low as 0.016 inch. The Regulatory Guide 1.121 analysis therefore substantiates the adequacy of current Technical Specification Basis.
The evaluation further confirms leak-before-break behavior utilizing test data on leakage rates and burst strength as a function of through wall crack length. Compliance to existing Technical Specification leak limits provides reasonable assurance that plant shutdown can be achieved before a leaking tube would rupture under normal operating or accident conditions.
Any decision to leave degraded tubes in service at Indian Point 2 will be documented in the Condition Monitoring and Operational Assessment (CMOA) Report and justified in accordance with the requirements of the Steam Generator Program Plan, NEI 97-06 and EPRI Steam Generator Examination Guidelines Rev. 5. The basis to leave degraded tubes in service will duly consider ECT inaccuracy and projected degradation growth rate over the next operating cycle.
ATTACHMENT 4 TO NL-02-112 WCAP-15909-NP, "Regulatory Guide 1.121 Analysis for the Indian Point Unit 2 Steam Generators,"
dated August 2002 (Non-Proprietary)
Entergy Nuclear Operations, Inc.
Indian Point Unit No. 2 Docket No. 50-247