ML060950290

2006/03/22-GALL AMP: XI.M5, BWR Feedwater Nozzle (Audit Worksheet, GALL Report AMP)

ML060950290
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	03/22/2006
From:	Morgan M NRC/NRR/ADRO/DLR/RLRC
To:	Office of Nuclear Reactor Regulation
morgan M NRR/NRC/DLR/RLRC, 415-2232
Shared Package
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References
%dam200611, TAC MC9668
Download: ML060950290 (6)

Text

AUDIT WORKSHEET GALL REPORT AMP PLANT: ______________________________

LRA AMP: __________________________ REVIEWER: ______________________

GALL AMP: XI.M5, BWR Feedwater Nozzle DATE: __________________________

Program Auditable GALL Criteria Documentation of Audit Finding Element Program A. This program includes (a) enhanced inservice inspection (ISI) Consistent with GALL AMP: Yes No Description in accordance with the requirements of the American Society of Document(s) used to confirm Criteria:

Mechanical Engineers (ASME) Code,Section XI, Subsection IWB, Table IWB 2500-1 (2001 edition including the 2002 and 2003 Addenda) and the recommendation of General Electric (GE) NE-523-A71-0594, and Comment:

B. (b) system modifications to mitigate cracking. The program Consistent with GALL AMP: Yes No specifies periodic ultrasonic inspection of critical regions of the Document(s) used to confirm Criteria:

boiling water reactor (BWR) feedwater nozzle.

Comment:

1. Scope of A. The program includes enhanced ISI to monitor the effects of Consistent with GALL AMP: Yes No Program cracking on the intended function of the component, and Document(s) used to confirm Criteria:

Comment:

B. systems modifications to mitigate cracking. Consistent with GALL AMP: Yes No Document(s) used to confirm Criteria:

Comment:

XI.M5 BWR Feedwater Nozzle 1

Program Auditable GALL Criteria Documentation of Audit Finding Element

2. Preventive A. Mitigation occurs by systems modifications, such as removal Consistent with GALL AMP: Yes No Actions of stainless steel cladding and installation of improved spargers. Document(s) used to confirm Criteria:

Comment:

B. Mitigation is also accomplished by changes to plant-operating Consistent with GALL AMP: Yes No procedures, such as improved feedwater control and rerouting Document(s) used to confirm Criteria:

of the reactor water cleanup system, to decrease the magnitude

and frequency of temperature fluctuations.

Comment:

3. Parameters A. The aging management program (AMP) monitors the effects Consistent with GALL AMP: Yes No Monitored/ of cracking on the intended function of the component by Document(s) used to confirm Criteria:

Inspected detection and sizing of cracks by ISI in accordance with ASME Section XI, Subsection IWB and the recommendation of GE NE-523-A71-0594.

Comment:

4. Detection of A. The extent and schedule of the inspection prescribed by the Consistent with GALL AMP: Yes No Aging Effects program are designed to ensure that aging effects will be Document(s) used to confirm Criteria:

discovered and repaired before the loss of intended function of the component. Inspection can reveal cracking. GE NE-523-A71-0594 specifies ultrasonic testing (UT) of specific regions of the blend radius and bore. The UT examination techniques and Comment:

personnel qualifications are in accordance with the guidelines of GE NE-523-A71-0594. Based on the inspection method and techniques and plant-specific fracture mechanics assessments, the inspection schedule is in accordance with Table 6-1 of GE NE-523-A71-0594. Leakage monitoring may be used to modify the inspection interval.

5. Monitoring A. Inspections scheduled in accordance with GE NE-523-A71- Consistent with GALL AMP: Yes No and Trending 0594 provide timely detection of cracks. Document(s) used to confirm Criteria:

XI.M5 BWR Feedwater Nozzle 2

Program Auditable GALL Criteria Documentation of Audit Finding Element Comment:

6. Acceptance A. Any cracking is evaluated in accordance with IWB-3100 by Consistent with GALL AMP: Yes No Criteria comparing inspection results with the acceptance standards of Document(s) used to confirm Criteria:

IWB-3400 and IWB-3500.

Comment:

7. Corrective A. Repair is performed in conformance with IWB-4000 and Consistent with GALL AMP: Yes No Actions replacement in accordance with IWB-7000. As discussed in the Document(s) used to confirm Criteria:

appendix to this report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the corrective actions.

Comment:

8. A. Site quality assurance (QA) procedures, review and approval Consistent with GALL AMP: Yes No Confirmation processes, and administrative controls are implemented in Document(s) used to confirm Criteria:

Process accordance with the requirements of 10 CFR Part 50, Appendix B. As discussed in the appendix to this report, the staff finds the requirements of 10 CFR Part 50, Appendix B, acceptable to address the confirmation process and Comment:

administrative controls.

9. A. See Item 8, above. Consistent with GALL AMP: Yes No Administrative Document(s) used to confirm Criteria:

Controls Comment:

10. Operating A. Cracking has occurred in several BWR plants (NUREG-0619, Consistent with GALL AMP: Yes No Experience NRC Generic Letter 81-11). This AMP has been implemented Document(s) used to confirm Criteria:

for nearly 25 years and has been found to be effective in managing the effect of cracking on the intended function of feedwater nozzles.

Comment:

XI.M5 BWR Feedwater Nozzle 3

EXCEPTIONS Item Program Elements LRA Exception Description Basis for Accepting Exception Documents Reviewed Number (Identifier, Para.# and/or Page #)

1.

2.

ENHANCEMENTS Item Program Elements LRA Enhancement Description Basis for Accepting Enhancement Documents Reviewed Number (Identifier, Para.# and/or Page #)

1.

2.

DOCUMENT REVIEWED DURING AUDIT Document Number Identifier (number) Title Revision and/or Date 1.

2.

3.

4.

.

XI.M5 BWR Feedwater Nozzle 4