ML12255A054
| ML12255A054 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 09/07/2012 |
| From: | Kadokami E, Schultz M Mitsubishi Heavy Industries, Ltd |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 47990, UET-20120105 | |
| Download: ML12255A054 (3) | |
Text
0910712012 U.S. Nuclear Regulatory Commission Operations Center Event Report Paze I Part 21 (PAR)
Event#
47990 Rep Org: MITSUBISHI HEAVY INDUSTRIES, LTD.
Notification Date I Time: 04/19/2012 12:33 (EDT)
Supplier: MITSUBISHI HEAVY INDUSTRIES, LTD.
Event Date I Time: 02/13/2012 (EDT)
Last Modification: 09/07/2012 Region:
1 Docket #:
City: ARLINGTON Agreement State:
Yes County:
License #:
State: VA NRC Notified by: MIKE SCHULTZ Notifications: CHRISTOPHER CAHILL RIDO HQ Ops Officer: HOWIE CROUCH STEVEN VIAS R2DO Emergency Class: NON EMERGENCY DAVE PASSEHL R3DO 10 CFR Section:
HEATHER GEPFORD R4DO 21.21 (a)(2)
INTERIM EVAL OF DEVIATION PART 21 GRP (EMAIL)
PART 21 - STEAM GENERATOR TUBE WEAR ADJACENT TO RETAINER BARS The following information was obtained from Mitsubishi Heavy Industries, LTD on April 19, 2012 was inadvertently added to Event Notification#47833 as an update to that event. The vendor's intent was to issue two interim reports; one for San Onofre Nuclear Generating Station (SONGS) Unit 2 and one for SONGS Unit 3. The information was obtained via fax:
"On January 31, 2012, San Onofre Unit 3 shut down due to indications of a steam generator tube leak. Steam generator tube inspections confirmed one small leak on one tube in one of the two steam generators. Continuing inspections of 100% of the steam generator tubes in both Unit 3 steam generators discovered unexpected wear, including tube to tube as well as tube to tube support structural wear. Inspection, testing, and analysis of SG tube integrity in both Unit 3 SGs is ongoing. In-situ pressure testing identified eight Unit 3 SG tubes that did not meet the target performance criteria in Technical Specification for tube integrity. One of the failed tubes was the leaking tube that required the Unit 3 shutdown.
"Discovery date: February 21, 2012 "Evaluation completion schedule date: August 31, 2012" Interim Report: U21-019-IR Reference Document: UET-20120105 Original notifications (per EN 47833) were made to R1DO (Joustra), R2DO (Nease), R3DO (Peterson), R4DO (O'Keefe), and Part 21 Group via email.
.I (-ý.
09/07/2012 U.S. Nuclear Regulatory Commission Operations Center Event Report Paze 2 Part 21 (PAR)
Event #
47990 Notified R1 DO (Cahill), R2DO (Vias), R3DO (Passehl), R4DO (Gepford) and Part 21 Groups via email.
UPDATE FROM MITSUBISHI HEAVY INDUSTRIES, LTD VIA FAX ON 6/4/12 AT 1145 EDT ***
The vendor reported that eight Unit 3 SG tubes did not meet the target performance criteria in Technical Specifications for tube integrity.
Notified R1 DO (Cahill), R2DO (Vias), R3DO (Passehl), R4DO (Gepford) and Part 21 Groups via email.
- *
- UPDATE FROM MITSUBISHI HEAVY INDSUSTRIES, LTD VIA FAX ON 9/7/12 AT 1539 EDT * * *
"MHI evaluated that the deviation contains a reportable defect for San Onofre Nuclear Generating Station Unit 2 and 3."
Notified R4DO (Gaddy) and Part 21 Reactor Group.
4 MITSUBISHI HEAVY INDUSTRIES, LTD.
16-5, KONAN 2-CHOME, MINATO-KU Document Control Desk Ret: UET-20120201 Rev.0 U.S. Nuclear Regulatory Commission Date: September 7, 2012 Washington, DC 20555-0001
Subject:
Notification of a defect under 10 CFR 21.21 (d)(3)(i)
- 1. Interim Reports and Evaluation Results Mitsubishi Heavy Industries, LTD (MHI) has identified steam generator tube wear for San Onofre Nuclear Generating Station. MHI had generated the following two interim reports for these tube wear and submitted them to U.S. Nuclear Regulatory Commission (NRC). MHI completed evaluation of a defect.
Interim Report I (No.U21-018-IR Revision 1 with a letter UET-20120089 Revision 1)
Title:
Steam Generator tube wear adjacent to retainer bars Evaluation Result:
MHI evaluated that the deviation contains a reportable defect for San Onofre Nuclear Generating Station Unit 2 and 3.
Interim Report 2 (No.U21-019-IR Revision 1 with a letter UET-20120105 Revision 1)
Title:
Steam Generator tube to tube wear Evaluation Result:
MHI evaluated that the deviation contains a reportable defect for San Onofre Nuclear Generating Station Unit 2 and 3.
- 2. The written report The written reports pursuant to 10 CFR 21.21 (d)(4) will be submitted to NRC by October 6. 2012.
Yours very truly, Ei Kadokami Senior Vice President Deputy Head of Nuclear Energy Systems Head of Nuclear Energy Systems Head of Kobe shipyard & Machinery Works Mitsubishi Heavy Industries, Ltd.