ML20236K930

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Forwards Status on VSC-24 Weld Issues for Info Purposes. Future Events & Dates Subject to Change.Provides Outline of Internal Plan to Complete CAL Items.Requests Maintaining Guide as Internal Planning Guide
ML20236K930
Person / Time
Site: Palisades, Point Beach, Arkansas Nuclear, 07201007  Entergy icon.png
Issue date: 03/26/1998
From: Howe A
NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
To: Everett J, Jorgensen B, Spitzberg D
NRC, NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
Shared Package
ML20236K829 List:
References
FOIA-98-188 NUDOCS 9807100144
Download: ML20236K930 (5)
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l T' o From: Allen Howej A/en tJ l To:

ARD1.ARP1.JVE, ARD1.ARP1.DBS, CHD1.CHP2.BLJ, CHD1.... /M f i Date: 3/26/98 8:34am

Subject:

VSC-24 Weld lasues Status I am providing you the attached status on the VSC-24 weld issues for your information. As always, future events and dates are subject to change. This does, however, provide a general outline of SFPO's intemal plan to complete the CAL items. As this is an intemal planning guide, I request that you maintain it as one. Please contact me or Tim Kobetz if you have any questions. Thanks Allen i CC: emh1, tjk1, ekb1 l

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~2' 9807100144 900630 PDR FOIA '

DUM POR 1ve,S,98 - 188 ~

'T VSC 24 FABRICATION AND WELDING ISSUES TAC # L21140 Last Update: March 25,1998 Project Manager: Tim Kobotz Wold Team: A. Howe (Team Leader), K. Battige, G.Homeeth, M.Vassilaros, H. Lee, R.Parkhill, C.Interrante, E.Hackett T= Target: C= Complete: TBD=To be determened MILESTONES DATE TEAM lasue supplemental CALs to utilities 9/5/97C Kobotz Receive Consumers Enerov's CAL response (Palisades) 9/19/97C Receive Sierra Nuclear Corporation's (SNC) RAI response 9/19/97C Receive WEPCo's CAL response (Point Beach) 9/22/97C Receive Entergy's CAL response (ANO) 3/12/98C NRC review CAL responses and trubate RAls to resolve questens 9/19/97- Weld Team 11/6/97 VSC-24 Owners Group verbalty commets to perform UT 11/13/97C NRC issues letter to SNC desertbing commitments made to VSC 24 12/09/97C Kobotz Owners Group at a meetino December 4,1997 SNC sutwruts revised calculation for allowable flew deferubon in structural 12/17/97C lid weld SNC sutwruts schedule to qualify UT process 12/73/97C NRC completes review of revised allowable flaw size definition and 2/12/98C Wold Team notifies SNC that it is acceptable NRC observaten of implementaten of flaws into MSB mock-up 1/2W98C Battes & Parkhill l NRC inspection of P-Scan UT quehfcation process at ANO 3/20/98C Howe, Battige, Contractors NRC inspection of " Time of Flight

  • UT C =% process at Paheados 4/24/98T Howe, Bathge, Contractors NRC completes independent fracture toughness techng and venication Spring /98T Weld Team RES of allowable flew definihon SNC sutmts revised calculaten for allowable flew delmibon in structural Spnng/98T lid weld usine fracture toughness testing resuNs,. Also SNC submits flew size acceptance ciiteria.

NRC completes techrucal review of an outstar.dmg RAI and CAL issues Late Wold Team issue Closeout Evaluation Report Sprino/98T Perform inspechons at ANO 6/98T Howe, Battige, Homeeth, Paa'an IV issue ANO inspechon Report; Ult CAL 6/98T Howe, Battge, Homseth, PW IV Perform inopochons at Pomt Beach 7/98T Kobotz, Bathge Region til MILESTONES DATE TEAM lasue Point Beach inspection Report; Lift CAL 7/98T Kobotz, Balbge PW lli Perform inspechons at Palasades Fall /98T Kobotz, Battige Reg 6on lli issue Paheados inspechon Report; Lift CAL Fall /98T Kobotz, Bathge Raf=t 111 inspect Point Beach cask loadena (1st load since H2 ionihon) TBD TBD inspection ANO cask loadma TBD TBD inspection Palisades cask loadme TBD TBD inspect Point Beach UT of previously loaded casks TBD TBD inspechon Pensades UT of previously loaded casks TBD TBD inspection ANO UT of previously loaded casks TBD TBD Bnef Desenchon Since 1992, NRC has contmuod to identify QA problems with SNC. In Spring 1997, NRC identified significant failures by SNC to perform effective corrective actions. One of the failures involved inadequate follow up to weld cracking problems encountered at ANO and Palisades during the loading of casks. In response, in

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  • May 1997 CALs were issued to SNC and the user utilities (Pahsados, Point Beach and ANO) to resolve the welding problems before loading additional casks (the CALs were supplemented in September). During the investigation into 'j the welding problems, SNC became aware that March Metalfab (MMI), a subcontractor, had not documented all welding performed on the casks during fabrication. The E ::C- ik , also revealed that hydrogen induced cracking appeared to be the most likely contributor to the weld problems at ANO. At Palisades, the weld crack was caused by an existing condebon in the shell material which opened up during the shield-lid welding process. The crack l propagated along grain boundarios of a pre existing weld of unknown origin. Cracking identified at Point Beach was l attributed to poorjoint fit-up.

Currently, three primary problems exist; (1) welding procedures must be developed to inhibit hydrogen induced cracking. (2) due to the uncertainty of SNC's QA program and the identification of undocumented wolds,liconeses

! must certify the integrity of casks to be loaded in the future, and (3) NRC must confirm the integrity of previously l

loaded casks or require the casks be unloaded.

i Current Status. Transducer failures delayed w,-;E ':-, of P Scan demonstration at ANO. " Time of Flight" planned for Paheados during the week of MINV98 Fracture toughness testing of weld specimens by the licensees is ongoing Potential Problem / Resolution NONE Resource Exoendrture Approximately 0.5 FTE 1

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,, Mall Envelope Info: (351 A596D.A46 : 17 : 42080)

Subject:

VSC 24 Weld issues Status Creation Date: 3/26/98 8:34am From: Allen Howe Created By: WND1.WNP7:AGH1 Recipients Action Date & Time Post Office ARD1.ARP1 DBS (David Spitzberg)

JVE (J. Vincent Everett)

Post Office CHD1.CHP2 BLJ (Bruce Jorgensen)

RBL (Ross Landsman)

Post Office TWD2.TWP0 emh1 CC (Edwin Hackett)

Post Office WND1.WNP7 ckb1 CC (Charles (Ken) Battige) tjk1 CC (Timothy Kobetz)

Post Office WND2.WNP3 LLG (Linda Gundrum)

PMR (Phillip Ray)

RGS (Robert Schaaf)

WDR (William Reckley)

Domain. Post Office Delivered Route ARD1.ARP1 Pending ARD1.ARP1 CHD1.CHP2 Pending CHD1.CHP2 TWD2.TWP0 Pending TWD2.TWP0 WND1.WNP7 Pending WND1.WNP7 WND2.WNP3 Pending WND2.WNP3 Files Size Date & Time MILESTON.R1 35088 03/25/98 07:56am MESSAGE 420 03/26/98 08:34am View 4109 03/26/98 03:34am Options Auto Delete: No Expiration Date: None Notify Recipients: No Priority: Normal Reply Requested: No Return Notification:: None Concealed

Subject:

No Security: Normal

o To Be Delivered: Im m ediato Status Tracking: Allinformation l

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