ULNRC-06370, Supplement to Request 14R-04 for Relief from ASME Section XI Code Inservice Inspection Requirements
| ML17135A395 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 05/15/2017 |
| From: | Wink R Ameren Missouri, Union Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| TAC MF8524, ULNRC-06370 | |
| Download: ML17135A395 (6) | |
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- s Ameren MISSOURI CaIIav,a Pluni May 15.2017 ULNRC-063 70 U.S. Nuclear Regulatory Commission Attn
- Document Control Desk Washington. DC 20555-0001 10 CfR 50.55a Ladies and Gentlemen:
DOCKET NUMBER 50-183 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.
RENEWED FACILITY OPERATING LICENSE NPF-30 SUPPLEMENT TO REQUEST IIR-Ol FOR RELIEF FROM ASNIE SECTION XI CODE INSERVICE INSPECT1ON REQU1REMENTS (TAC NO. MF8521)
Reference:
1.
ULNRC-06333. Request for Relief from Requirements of ASME Section XI Code Inservice Inspection Requirements (Relief Request 14R-04). dated October 25. 2016 (ADAMS Accession No. /ML16299A451)
Pursuant to 10 CFR 50.55a(g)(5)fiii). Reference 1 transmitted a request for relief from the requirements of ASME Section XI Appendix VIII for qualification of ultrasonic testing (UT) that will be performed on eight dissimilar metal (DM) nozzle-to-safe end welds and eight austenitic safe end-to-piping welds that are listed in the relief request. on the basis that the accuracy requirement of Supplement 14 to Appendix VIII was impractical to achieve.
The requested relief is intended for the fourth 10-year inservice inspection interval of Callaways Inservice Inspection (151) Program. With regard to the American Society of MechanicaL Engineers (ASME) Boiler and Pressure Vessel Code, i.e..Section XI, Rules and Inservice Inspection of Nuclear Power Ptant Components. the Code Edition and Addenda applicable to Callaways fourth 10-year ISI interval is the 2007 Edition through 2008 Addenda. Supporting information and essential details for the requested Code relief. including proposed alternative and basis for use, were provided in Relief Request 14R-04 attached to the Reference 1 Letter.
P.O. Box 620 Ftilton, MO 65251 AmerenMissouri.com
ULNRC-063 70 May 15. 2017 Page 2 After submittal of Relief Request 14R-04 via Reference 1. it was found that that the relief request had inapptopriately cited superseded ASME Code Case N-716. which had not been approved for use by the NRC Staff The appropriate reference is to ASJvIE Code Case N-? 16-1. which was approved for use in Regulatory Guide 1.147. Rev. 17. Thus, to be clear, the austenitic welds that are listed in the relief request are categorized in accordance with ASME Code Case N-716-l. A corrected page for previously submitted Relief Request 14R-04 is attached.
This letter does not contain new commitments.
If there are any questions, please contact me at 573-676-8719.
Sincerely.
Z2L
?%f 4
R. C. Wink Manaer. Reu1atory Affairs JPK
Attachment:
Corrected Page (Page 1 of 5) for 10 CFR 50.55a Request Number 14R-04
ULNRC-063 70 May 15. 2017 Page 3 cc:
Mr. Kriss M. Kennedy Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington. TX 7601 1-45 Ii Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman. MO 65077 Mr. L. John Klos Proj ect Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 08H4 Washington. DC 20555-0001
ULNRC-063 70 May 15. 2017 Page 4 Index and send hardcopy to QA File A160.0761 Hardcopy:
Certuec Corporation 6100 Western Place. Suite 1050 Fort Worth. TX 76107 (Certrec receives ALL attachments as long as they are non-safeguards and ma be publicly disclosed.)
Electronic distribution for the following can be made via Other Situations ULNRC Distribution:
F. M. Diva T. F. Herrmairn B. L. Cox R. C. Wink T. B. Elwood Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. Jay Silberg (Pillsbury Winthrop Shaw Pittman LLP)
Missouri Public Service Commission
AHachment to U LNRC-063 70 Page 1 of2 Attachment to ULNRC-06370 Corrected Page (Page 1 of 5) for 10 CFR 50.55a Request Number 14R-04 1 Page
Attachment to ULNRC-063 70 Page 2 of 2 10 CFR 50.55a Request Number 14R-04 Proposed Alternative In Accordance with 10 CFR 50.55a(g)(5)(iii)
--Inservice Inspection Impracticality-1.
ASME Code Component(s) Affected The components covered under relief request 14R-04 include four dissimilar metal hot-leg welds.
four dissimilar metal cold-leg welds, and eight austenitic welds. The inspections of the dissimilar metal welds are conducted according to ASME Code Case N-770-l. Inspection hem A-2. Unmitigated butt weld at Hot Leg operating temperature (-2410) 625°f (329°C). and Inspection Item B. Unmitigated btitt weld at Cold Leg operating temperature (-2410) 525°F (274°C) and < 580°f (304°C). The dissimilar metal welds are detailed in Table 1.
The austenitic welds are inspected in accordance with Callaways risk-informed ISI program. In accordance with ASME Code Case N-716-l. these welds are categorized as Inspection Category RA Item Number Ri.20. Elements not Subject to a Damage Mechanism. The austenitic welds are detailed in Table 2.
Table 1: Large Bore Dissimilar Metal (DM) Welds Weld N-770-1 Inner Nominal Wall Designation Item Weld Description Diameter Thickness 2-RV-301-121-A A-2 Loop I outlet nozzle to safe-end 29 in.
1.5 in.
2-RV-301-121-B A-2 Loop 2 outlet nozzle to safe-end 29 in.
2.5 in.
2-RV-301-121-C A-2 Loop 3 outlet nozzle to safe-end 29 in.
2.5 in.
2-RV-301-121-D A-2 Loop 4 otittet nozzle to safe-end 29 in.
2.5 in.
2-RV-302-12l-A B
Loop I inlet safe-end to nozzle 27.5 in 2.3$ in.
2-RV-302-121-B B
Loop 2 inlet safe-end to nozzle 27.5 in 2.3$ in.
2-RV-302-121-C B
Loop 3 inlet safe-end to nozzle 27.5 in 2.3$ in.
2-RV-302-121-D B
Loop 4 inlet safe-end to nozzle 27.5 in 2.3$ in.
Table 2: Large Bore Austenitic Welds Weld Inner Nominal Walt Designation Weld Description Diameter Thickness 2-BB-0l-F103 Loop 1 outlet safe-end to pipe 29 in.
2.5 in.
2-BB-0l-f 102 Loop 1 inlet elbow to safe-end 27.5 in 2.3$ in.
2-B3-01-f203 Loop 2 outlet safe-end to pipe 29 in.
2.5 in.
2-BB-01-f202 Loop 2 inlet elbow to safe-end 27.5 in 2.38 in.
2-BB-0J-f303 Loop 3 outlet safe-end to pipe 29 in.
2.5 in.
2-BB-01-F302 Loop 3 inlet elbow to safe-end 27.5 in 2.38 in.
2-BB-01-F403 Loop 4 outlet safe-end to pipe 29 in.
2.5 in.
2-BB-01-f402 Loop 4 inlet elbow to safe-end 27.5 in 2.38 in.