ML11207A434
| ML11207A434 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/18/2011 |
| From: | Swift P Constellation Energy Group, EDF Development, Nine Mile Point |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML11207A434 (13) | |
Text
This letter forwards proprietary information in accordance with 10 CFR 2.390. The balance of this letter may be considered non-proprietary upon removal of Attachment 4.
P.O. Box 63 CENG
.~oo Lycoming, NY 13093 a joint venture of 0Consteflatlon EOna-w
ŽeDF NINE MILE POINT NUCLEAR STATION July 18, 2011 U.S. Nuclear Regulatory Commission Washington, D.C. 20555-0001 ATTENTION:
Document Control Desk
SUBJECT:
Nine Mile Point Nuclear Station Unit No. 1; Docket No. 50-220 Fourth Inservice Inspection Interval First Inservice Inspection Period 2011 Owner's Activity Report for Refueling Outage 21 Inservice Examinations Pursuant to 10 CFR 50.55a, Nine Mile Point Nuclear Station, LLC (NMPNS) is submitting Attachment 1, Fourth Inservice Inspection Interval First Inservice Inspection Period 2011 Owner's Activity Report, for Nine Mile Point Unit I (NMP1).
This report summarizes the results of examinations performed during the last refueling outage (RFO-21) of the First Inservice Inspection Period of the Fourth Ten-Year Inspection Interval (December 26, 2009 through December 25, 2019).
This activity report meets the requirements of the American Society of Mechanical Engineers (ASME),
Code Case N-532-4, "Alternative Requirements to Repair and Replacement Documentation Requirements and Inservice Summary Report Preparation and Submission as Required by IWA-4000 and IWA-6000,Section XI, Division 1," as approved for use by Regulatory Guide 1.147, "Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1.", Nine Mile Point Unit I Steam Dryer Support Bracket Flaw Evaluation, delineates the flaw evaluation performed for the indications identified in the NMPI steam dryer support brackets during RFO-21. Attachment 4 was prepared by Structural Integrity Associates, Inc (SAI) and includes information provided by the Electric Power Research Institute (EPRI).
- 4.'(47 This letter forwards proprietary information in accordance with 10 CFR 2.390. The balance of this letter may be considered non-proprietary upon removal of Attachment 4.
Document Control Desk July 18, 2011 Page 2 The information provided by EPRI is considered to contain proprietary information exempt from disclosure pursuant to 10 CFR 2.390. Therefore, on behalf of EPRI, NMPNS hereby makes application to withhold this attachment from public disclosure in accordance with 10 CFR 2.390(b)(1). The affidavit from EPRI detailing the reason for the request to withhold the proprietary information is provided in. Attachment 2 contains a non-proprietary version of the SAI flaw evaluation.
Should you have any questions regarding the information in this submittal, please contact John J. Dosa, Director Licensing, at (315) 349-5219.
Very truly yours, Paul M. Swift Manager Engineering Services PMS/MHS Attachments:
- 1. Fourth Inservice Inspection Interval First Inservice Inspection Period 2011 Owner's Activity Report for RFO-21 Inservice Examinations
- 2. Nine Mile Point Unit I Steam Dryer Support Bracket Flaw Evaluation (non -
proprietary version)
- 4. Nine Mile Point Unit 1 Steam Dryer Support Bracket Flaw Evaluation (proprietary version) cc:
NRC Regional Administrator, Region I NRC Project Manager NRC Senior Resident Inspector
ATTACHMENT 1 FOURTH INSERVICE INSPECTION INTERVAL FIRST INSERVICE INSPECTION PERIOD 2011 OWNER'S ACTIVITY REPORT FOR RFO-21 INSERVICE EXAMINATIONS Nine Mile Point Nuclear Station, LLC July 18,2011
Constellation Energy Group Nine Mile Point Nuclear Station FOURTH INSERVICE INSPECTION INTERVAL FIRST INSERVICE INSPECTION PERIOD 2011 OWNER'S ACTIVITY REPORT FOR RFO-21 INSERVICE EXAMINATIONS Prepared For Nine Mile Point Nuclear Station Unit I P.O. Box 63, Lake Road Lycoming, New York 13093 Commercial Service Date:
December 26, 1969 NRC Docket Number:
50-220 Document Number:
NMPi-OAR-004-0 2 1 Revision Number:
00 Date:
June 20, 2011 I
Nine Mile Point Nuclear Station Unit I CNG-NMPI-OAR-004-21 AM Constellation Energy Grou FOURTH INSERVICE INSPECTION Rev.
00 Nine Mile Point INTERVAL Nuclear Station 2011 OWNER'S ACTIVITY REPORT Date: June 20, 2011 FOR INSERVICE EXAMINATIONS Page 2
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TABLE OF CONTENTS T a ble o f C o nte nts....................................................................................................................................................
2 R e cord o f R e visio n.....................................................................................................................................................
3 A b stra ct.......................................................................................................................................................................
4 Form OAR-1 Owner's Activity Report for ASME Section XI Inspection & Testing Plans....................................
6 Table 1 Items with Flaws or Relevant Conditions that Required Evaluation for Continued Service.....................
7 Table 2 Abstract of Repairs, Replacements, or Corrective Measures Required for Continued Service.............. 8
Nine Mile Point Nuclear Station Unit 1 CNG-NMP1-OAR-004-21 0
CorkstelLation EneOy Group FOURTH INSERVICE INSPECTION Rev.
00
.ni m....
INTERVAL Nine Mile Point Nucear Station 2011 OWNER'S ACTIVITY REPORT Date: June 20, 2011 FOR INSERVICE EXAMINATIONS Page 3
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00 June 15,2011 Entire Document Initial issue of Owner's Activity Report for ASME Section XI Inservice Inspection, Containment Inservice Examinations, and Pressure Tests and Alternate Risk-Informed Inspection in accordance with the requirements of ASME Code Case N-532-4.
Nine Mile Point Nuclear Station Unit I CNG-NMPI-OAR-004-21 0 Ccw Gamu FOURTH INSERVICE INSPECTION Rev.
00 INTERVAL Nine Mile Point Date: June 20, 2011 Nudear Station 2011 OWNER'S ACTIVITY REPORT FOR INSERVICE EXAMINATIONS Page 4
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ABSTRACT ASME Section XI Code Case N-532-4 requires submission of the Owner's Activity Report to the regulatory and enforcement authorities having jurisdiction at the plant site within 90 calendar days of the completion of each refueling outage.
This Owner's Activity Report summarizes the results of the Nine Mile Point Nuclear Station (NMPNS), Unit 1, American Society of Mechanical Engineers (ASME)Section XI In-service Inspection, Risk-Informed Inspection, Containment In-service Examinations, and Pressure Tests performed during Refueling Outage Twenty-One (RFO-21), from March 20, 2011 through April 20, 2011, and the First outage of the Fourth In-service Inspection Period that started on August 23, 2009 and is scheduled to end on August 22, 2012.
The attached Table I and 2 include flaws and conditions (those meeting the requirements of Code Case N-532-
- 4) identified since the last Owner's Activity Report following Refueling Outage RFO-20.
As an alternate to the requirements of the ASME, Boiler and Pressure Vessel Code (B&PVC),Section XI, Article IWA-6000, NMPNS is implementing ASME Code Case N-532-4, Alternative Requirements to Repair and Replacement Documentation Requirements and In-service Summary Report Preparation and Submission as Required by IWA-4000 and IWA-6000,Section XI, Division 1". Regulatory Guide 1.147, Revision 15, approved ASME Code Case N-532-4 for use. This Report complies with the requirements of Code Case N-532-4 and the conditions identified in RG 1.147.
OWNER'S ACTIVITY REPORTS - FORM OAR-1 Owner's Activity Reports Form OAR-I's were prepared and certified upon completion of the Nine Mile Point Unit 1, 2011 refueling outage (RFO-21) examination activity in accordance with the following NMPNS inspection plans and schedules:
CNG-NMPI-ISI-004, Fourth Ten-Year In-service Inspection Plan and Implementing Schedule, (includes the Alternate Risk-Informed Inspection Program CNG-NMPI-CISI-002, Second Containment In-service Inspection Plan and Implementing Schedule.
NMP1 -PT-003, Inservice Pressure Testing Program Plan In addition to the Owner's Activity Report, Form OAR-I, the following Tables are also included:
- a.
Items with Flaws or Relevant Conditions that Require Evaluation for Continued Service, Table 1, provides a listing of item(s) with flaws or relevant conditions that required evaluation to determine acceptability for continued service, whether or not the flaw or relevant condition was discovered during a scheduled examination or test, and provides such Information as Examination Category, Examination Item Number, Item Description, Flaw Characterization (as required by IWA-3300).
- b.
Abstract of Repairs, Replacements or Corrective Measures Required for Continued Service,
Nine Mile Point Nuclear Station Unit I CNG-NMP1-OAR-004-21 Energy Grou FOURTH INSERVICE INSPECTION Rev.
00 Energy QUP INTERVAL Nine Mile Point Date: June 20, 2011 Nudear Station 2011 OWNER'S ACTIVITY REPORT FOR INSERVICE EXAMINATIONS Page 5
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Table 2, identifies those items containing flaws or relevant conditions that exceeded Division 1 acceptance criteria shall be provided with the information and format of Table 2. This information is required even if the discovery of the flaw or relevant condition that necessitated the repair/replacement activity did not result from an examination or test required by Division 1. If the acceptance criterion for a particular item is not specified in Division 1, the provisions of IWA-3100(b) shall be used to determine which repair/replacement activities are required to be included in the abstract.
In accordance with ASME Section Xl, IWB-2412(a), IWC-2412, IWD-2412 IWE-2412(a), and IWF-2410(b) and with the exception of the examinations that may be deferred until the end of the inspection interval as specified in Table IWB-2500-1, IWC-2500-1, IWD-2500-1, IWF-2500-1 and IWE-2500-1, including those examinations which NMPNS has requested and received approval in the form of proposed alternatives in accordance with 10CFR50.55a(a)(3), the required examinations in each examination category have been completed for the First In-service Inspection Period in accordance with Tables IWB-2412-1, IWC-2412-1, IWD-2412-1, IWE-2412-1, and IWF-2410-2.
Nine Mile Point Nuclear Station Unit I CNG-NMPI-OAR-004-21 OConstellation Energy Group FOURTH INSERVICE INSPECTION Rev.
00 n...
INTERVAL Nine Mile FointDaeJue1,21 Nuce Stdon 2011 OWNER'S ACTIVITY REPORT Date: June 15, 2011 FOR INSERVICE EXAMINATIONS Page 6
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FORM OAR-1 OWNER'S ACTIVITY REPORT As required by the provisions of the ASME Code Case N-532-4 Report Number, NMPI -OAR-004-021 III I IIIIII Nin9 Mile Point Nuclear Station. P. O. Box 63. Lvqoming, New York 1:*093 Plant Nine Mile Point Nuclear Station. P. 0. Box 63, Lycomina. New York 13093 (Name and Address of Plant).
Plant Unit 1
Commercial Service Date December 26, 1969 Refueling Outage Number RFO-21 Current Inspection Interval 4th Interval for ISI & PT. 2no Interval fo! CISI Auaust 23. 2009 to Auaust 22. 2019 Firs~t in..nnnAr' Inmenai' n PAr~ind Current Inspection Pnrifvl V~ 9flflQ tn Aainai~t 72 2fl12 riod At in"af ?-'A 7009 to At inalat 22 2017 (1st, zn., 3rd)
Edition and Addenda of Section Xl applicable to the Inspection Plans 2004 Edition, No Addenda Date and Revision of Inspection Plans CNG-NMP1-ISI-004. Revision 01, December 2. 2010 (QS). CNG-NMP1-CISI-002.
Revision 01. December 2. 2010 lContainment IS11 NMPJ-PT-O03 Revision 04. March 15. 2011 (Pressure Test)
Edition and Addenda of ASME Section XA applicable to Repair/Replacement activities, if different than the Inspection Plan N!IA I'sanrme C"ile I:ditinn/Ad~rkanida
,w,....
....-,(if aoolUcable)
CERTIFICATE OF CONFORMANCE I certify that (a) the statements made in this report are correct; (b) the examinations and tests meet the Inspection Plan as required by the ASME Code,Section XI; and (c) the repair/replacement activities and evaluations supporting the completion of RFO.. 1 conform to the requirements of Section Xl.
tng o ge number)
Sign (fGen ral S§r*ev*-
a ginee ng Programs)
Date 6 X;t x' la.,
, (
CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of V07..
and employed by
'e..
of Rgirfo), 6r have inspected the items described in this owners Activity Report and state that to the best of my knowledgb and belief, the Owner has performed all activities represented by this report in accordance with the requirements of Section XI.
By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the repair/replacement activities and evaluation described in this report. Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal Injury or property damage or a loss of any kind arising from or connn e
inspection.
Commissions eVIS/ /-*7 A.-.,, i VY W5.-
61i- ?/lnspectoes Signature National Board, State, Province, and Endorsements
Nine Mile Point Nuclear Station Unit I CNG-NMP1-OAR-004-21 0 Conrgyll on FOURTH INSERVICE INSPECTION Rev.
00 Energy Group INTERVAL Nine Mile Point Date: June 20, 2011 Nuclear Station 2011 OWNER'S ACTIVITY REPORT FOR INSERVICE EXAMINATIONS Page 7
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TABLE I ITEMS WITH FLAWS OR RELEVANT CONDITIONS THAT REQUIRED EVALUATION FOR CONTINUED SERVICE As required by the provisions of the ASME Code Case N-532-4 EVALUATION DESCRIPTION EXAMINATION ITEM ITEM CATEGORY NUMBER DESCRIPTION B-A B1.40 Reactor Vessel Head -
Condition Report CR-2011-003409 documents the identification of a to - Flange Weld flaw exceeding the acceptance criteria of IWB-3510. The indication is subsurface, is 1.239" in the through wall dimension, and 79" long.
The flaw has been determined to be an original fabrication defect.
A flaw evaluation was performed for the indication per the ASME Section XI (2004 Edition) acceptance criteria. The evaluation follows the similar approach used in Structural Integrity Report,
'Nine Mile Point Unit 1 RPV Closure Head Flaw Evaluation,' SIR 036, Rev. 0, July, 2003. The end of evaluation period of 60 years was used. The allowable flaw size for the circumferential flaw in the RPV closure head weld was calculated to be 1.99 inches. It is shown that the final flaw size at the end of evaluation period is still below the allowable flaw size. Thus, the indication is acceptable for continued operation.
The evaluation performed in support of this condition was submitted to the NRC for their approval on June 28, 2011.
B-N-2 B13.30 Reactor Vessel Interior Condition Reports CR-2011-002755 and CR-2011-002866 Attachment Weld -
document the identification of a relevant indication exceeding the Beyond Beltline Region acceptance criteria of IWB-3520.2. During visual examination of (Steam Dryer Support steam dryer support bracket lug (1-587C) at 230', indications were Bracket) noted in the bracket base material, right side (231 deg.) and top of the bracket lug. The indication runs for a length of 3.250" and transverses around the top right comer and continues for approximately 1.00".
Similar indications were detected in the dryer support bracket lugs at the 50 and 130 deg azimuth locations (Exam Id's 1-587A and 1-587B, respectively). Follow-up informational ultrasonic (UT) exams confirmed the indication lengths seen visually and determined the indications were relatively shallow. The UT indications are located entirely within the base metal of the bracket and run parallel to the vessel attachment weld such that they are not considered a threat to propagate into and/or through the vessel attachment weld toward the vessel.
The supporting Engineering Evaluation concluded that the indication is acceptable for continued service for at least one additional operating cycle. In accordance with IWB-3144(b) the engineering evaluation of the exam results is submitted as an attachment to this Owner's Activity Report.
Nine Mile Point Nuclear Station Unit I CNG-NMPI-OAR-004-21 Energy Group FOURTH INSERVICE INSPECTION Rev.
00 INTERVAL Nine Mile Point INTERVAL Nuclear Station 2011 OWNER'S ACTIVITY REPORT Date: June 20, 2011 FOR INSERVICE EXAMINATIONS Page 8
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TABLE 2 ABSTRACT OF REPAIRIREPLACEMENT ACTIVITIES REQUIRED FOR CONTINUED SERVICE As required by the provisions of the ASME Code Case N-532-4 REPAIRIREPLACE DESCRIPTION MENT CODE ITEM OF DATE PLAN NUMBER CLASS DESCRIPTION WORK COMPLETED None I
I I
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1 I
I I
t I
I I
1 4.
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Nine Mile Point Nuclear Station Unit I CNG-NMPI-OAR-004-21 EneMg Gmu~p FOURTH INSERVICE INSPECTION Rev.
00 Nine Mile Point INTERVAL Nuclear Station 2011 OWNER'S ACTIVITY REPORT Date: June 20, 2011 FOR INSERVICE EXAMINATIONS Page 9
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END OF INSERVICE INSPECTION OWNER'S ACTIVITY REPORT FOR REFUELING OUTAGE TWENTY-ONE (RFO-21)
ATTACHMENT 2 NINE MILE POINT UNIT 1 STEAM DRYER BRACKET FLAW EVALUATION (NON-PROPRIETARY VERSION)
Nine Mile Point Nuclear Station, LLC July 18, 2011